Kubernetes Blog

merges

$ kubectl debug node/mynode -it --image=busybox --profile=netadmin

apiVersion: v1
kind: Pod
metadata:
  name: example-pod
spec:
  containers:
  - name: example-container
    image: customapp:latest
    env:
    - name: REQUIRED_ENV_VAR
      value: "value1"

# partial_container.yaml
env:
  - name: REQUIRED_ENV_VAR
    value: value2

kubectl debug example-pod -it --image=customapp --custom=partial_container.yaml

{
  "ports": [
    {
      "containerPort": 80
    }
  ],
  "resources": {
    "limits": {
      "cpu": "0.5",
      "memory": "512Mi"
    },
    "requests": {
      "cpu": "0.2",
      "memory": "256Mi"
    }
  },
  "env": [
    {
      "name": "REQUIRED_ENV_VAR",
      "value": "value2"
    }
  ]
}

apiVersion: v1
kind: Pod
metadata:
  name: implicit-groups
spec:
  securityContext:
    runAsUser: 1000
    runAsGroup: 3000
    supplementalGroups: [4000]
  containers:
  - name: ctr
    image: registry.k8s.io/e2e-test-images/agnhost:2.45
    command: [ "sh", "-c", "sleep 1h" ]
    securityContext:
      allowPrivilegeEscalation: false

# Create the Pod:
$ kubectl apply -f https://k8s.io/blog/2024-08-22-Fine-grained-SupplementalGroups-control/implicit-groups.yaml

# Verify that the Pod's Container is running:
$ kubectl get pod implicit-groups

# Check the id command
$ kubectl exec implicit-groups -- id

uid=1000 gid=3000 groups=3000,4000,50000

$ kubectl exec implicit-groups -- cat /etc/group
...
user-defined-in-image:x:1000:
group-defined-in-image:x:50000:user-defined-in-image

apiVersion: v1
kind: Pod
metadata:
  name: strict-supplementalgroups-policy
spec:
  securityContext:
    runAsUser: 1000
    runAsGroup: 3000
    supplementalGroups: [4000]
    supplementalGroupsPolicy: Strict
  containers:
  - name: ctr
    image: registry.k8s.io/e2e-test-images/agnhost:2.45
    command: [ "sh", "-c", "sleep 1h" ]
    securityContext:
      allowPrivilegeEscalation: false

# Create the Pod:
$ kubectl apply -f https://k8s.io/blog/2024-08-22-Fine-grained-SupplementalGroups-control/strict-supplementalgroups-policy.yaml

# Verify that the Pod's Container is running:
$ kubectl get pod strict-supplementalgroups-policy

# Check the process identity:
kubectl exec -it strict-supplementalgroups-policy -- id

uid=1000 gid=3000 groups=3000,4000

...
status:
  containerStatuses:
  - name: ctr
    user:
      linux:
        gid: 3000
        supplementalGroups:
        - 3000
        - 4000
        uid: 1000
...

apiVersion: v1
kind: Node
...
status:
  features:
    supplementalGroupsPolicy: true

$ kubectl exec -v=8 nginx -- date
GET https://127.0.0.1:43251/api/v1/namespaces/default/pods/nginx/exec?command=date…
Request Headers:
    Connection: Upgrade
    Upgrade: websocket
    Sec-Websocket-Protocol: v5.channel.k8s.io
    User-Agent: kubectl/v1.31.0 (linux/amd64) kubernetes/6911225

Response Status: 101 Switching Protocols in 3 milliseconds
Response Headers:
    Upgrade: websocket
    Connection: Upgrade
    Sec-Websocket-Accept: j0/jHW9RpaUoGsUAv97EcKw8jFM=
    Sec-Websocket-Protocol: v5.channel.k8s.io

podFailurePolicy:
  rules:
  - action: Ignore
    onPodConditions:
    - type: DisruptionTarget
  - action: FailJob
    onPodConditions:
    - type: ConfigIssue
  - action: FailJob
    onExitCodes:
      operator: In
      values: [ 42 ]

apiVersion: apps/v1
kind: Deployment
metadata:
  name: application-server
...
  affinity:
    podAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
      - labelSelector:
          matchExpressions:
          - key: app
            operator: In
            values:
            - database
        topologyKey: topology.kubernetes.io/zone
        matchLabelKeys:
        - pod-template-hash

kind: Pod
metadata:
  name: application-server
  labels:
    pod-template-hash: xyz
...
  affinity:
    podAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
      - labelSelector:
          matchExpressions:
          - key: app
            operator: In
            values:
            - database
          - key: pod-template-hash # Added from matchLabelKeys; Only Pods from the same replicaset will match this affinity.
            operator: In
            values:
            - xyz
        topologyKey: topology.kubernetes.io/zone
        matchLabelKeys:
        - pod-template-hash

affinity:
  podAffinity:      # ensures the pods of this tenant land on the same node pool
    requiredDuringSchedulingIgnoredDuringExecution:
    - matchLabelKeys:
        - tenant
      topologyKey: node-pool
  podAntiAffinity:  # ensures only Pods from this tenant lands on the same node pool
    requiredDuringSchedulingIgnoredDuringExecution:
    - mismatchLabelKeys:
        - tenant
      labelSelector:
        matchExpressions:
        - key: tenant
          operator: Exists
      topologyKey: node-pool

kind: Pod
metadata:
  name: application-server
  labels:
    tenant: service-a
spec: 
  affinity:
    podAffinity:      # ensures the pods of this tenant land on the same node pool
      requiredDuringSchedulingIgnoredDuringExecution:
      - matchLabelKeys:
          - tenant
        topologyKey: node-pool
        labelSelector:
          matchExpressions:
          - key: tenant
            operator: In
            values:
            - service-a 
    podAntiAffinity:  # ensures only Pods from this tenant lands on the same node pool
      requiredDuringSchedulingIgnoredDuringExecution:
      - mismatchLabelKeys:
          - tenant
        labelSelector:
          matchExpressions:
          - key: tenant
            operator: Exists
          - key: tenant
            operator: NotIn
            values:
            - service-a
        topologyKey: node-pool

kubectl get pvc example-vanilla-block-pvc

NAME                        STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS               AGE
example-vanilla-block-pvc   Bound    pvc-6791fdd4-5fad-438e-a7fb-16410363e3da   5Gi        RWO            example-vanilla-block-sc   19s

kubectl delete pv pvc-6791fdd4-5fad-438e-a7fb-16410363e3da

persistentvolume "pvc-6791fdd4-5fad-438e-a7fb-16410363e3da" deleted
^C

kubectl get pv pvc-6791fdd4-5fad-438e-a7fb-16410363e3da

NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS        CLAIM                               STORAGECLASS               REASON   AGE
pvc-6791fdd4-5fad-438e-a7fb-16410363e3da   5Gi        RWO            Delete           Terminating   default/example-vanilla-block-pvc   example-vanilla-block-sc            2m23s

kubectl delete pvc example-vanilla-block-pvc

persistentvolumeclaim "example-vanilla-block-pvc" deleted

kubectl get pv pvc-6791fdd4-5fad-438e-a7fb-16410363e3da

Error from server (NotFound): persistentvolumes "pvc-6791fdd4-5fad-438e-a7fb-16410363e3da" not found

kubectl get pv pvc-a7b7e3ba-f837-45ba-b243-dec7d8aaed53 -o yaml

apiVersion: v1
kind: PersistentVolume
metadata:
  annotations:
    pv.kubernetes.io/provisioned-by: csi.vsphere.vmware.com
  creationTimestamp: "2021-11-17T19:28:56Z"
  finalizers:
  - kubernetes.io/pv-protection
  - external-provisioner.volume.kubernetes.io/finalizer
  name: pvc-a7b7e3ba-f837-45ba-b243-dec7d8aaed53
  resourceVersion: "194711"
  uid: 087f14f2-4157-4e95-8a70-8294b039d30e
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 1Gi
  claimRef:
    apiVersion: v1
    kind: PersistentVolumeClaim
    name: example-vanilla-block-pvc
    namespace: default
    resourceVersion: "194677"
    uid: a7b7e3ba-f837-45ba-b243-dec7d8aaed53
  csi:
    driver: csi.vsphere.vmware.com
    fsType: ext4
    volumeAttributes:
      storage.kubernetes.io/csiProvisionerIdentity: 1637110610497-8081-csi.vsphere.vmware.com
      type: vSphere CNS Block Volume
    volumeHandle: 2dacf297-803f-4ccc-afc7-3d3c3f02051e
  persistentVolumeReclaimPolicy: Delete
  storageClassName: example-vanilla-block-sc
  volumeMode: Filesystem
status:
  phase: Bound

…
kind: Pod
spec:
  containers:
    - …
      volumeMounts:
        - name: my-volume
          mountPath: /path/to/directory
  volumes:
    - name: my-volume
      image:
        reference: my-image:tag

apiVersion: v1
kind: Pod
metadata:
  name: pod
spec:
  containers:
    - name: test
      image: registry.k8s.io/e2e-test-images/echoserver:2.3
      volumeMounts:
        - name: volume
          mountPath: /volume
  volumes:
    - name: volume
      image:
        reference: quay.io/crio/artifact:v1
        pullPolicy: IfNotPresent

kubectl apply -f pod.yaml

kubectl exec -it pod -- sh

/ # ls /volume
dir   file
/ # cat /volume/file
2
/ # ls /volume/dir
file
/ # cat /volume/dir/file
1

apiVersion: storage.k8s.io/v1alpha1
kind: VolumeAttributesClass
metadata:
  name: silver
driverName: your-csi-driver
parameters:
  provisioned-iops: "500"
  provisioned-throughput: "50MiB/s"
---
apiVersion: storage.k8s.io/v1alpha1
kind: VolumeAttributesClass
metadata:
  name: gold
driverName: your-csi-driver
parameters:
  provisioned-iops: "10000"
  provisioned-throughput: "500MiB/s"

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: test-pv-claim
spec:
  storageClassName: any-storage-class
  volumeAttributesClassName: silver
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 64Gi

kubectl patch pvc test-pv-claim -p '{"spec": "volumeAttributesClassName": "gold"}'

 KUBE_FEATURE_MyFeature=true

 KUBE_FEATURE_MyFeature=false

import (
 “k8s.io/client-go/features”
)

type AlwaysEnabledGates struct{}

func (AlwaysEnabledGates) Enabled(features.Feature) bool {
 return true
}

func init() {
 features.ReplaceFeatureGates(AlwaysEnabledGates{})
}

apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: color-canary
  namespace: faces
spec:
  parentRefs:
    - name: color
      kind: Service
      group: ""
      port: 80
  rules:
  - backendRefs:
    - name: color
      port: 80
      weight: 50
    - name: color2
      port: 80
      weight: 50

apiVersion: gateway.networking.k8s.io/v1
kind: Gateway
metadata:
  name: client-validation-basic
spec:
  gatewayClassName: acme-lb
  listeners:
    name: foo-https
    protocol: HTTPS
    port: 443
    hostname: foo.example.com
  tls:
    certificateRefs:
      kind: Secret
      group: ""
      name: foo-example-com-cert
    frontendValidation:
      caCertificateRefs:
        kind: ConfigMap
        group: ""
        name: foo-example-com-ca-cert

apiVersion: gateway.networking.k8s.io/v1alpha2
kind: BackendLBPolicy
metadata:
  name: lb-policy
  namespace: foo-ns
spec:
  targetRefs:
  - group: core
    kind: service
    name: foo
  sessionPersistence:
    sessionName: foo-session
    absoluteTimeout: 1h
    idleTimeout: 30m
    type: Cookie
    cookieConfig:
      lifetimeType: Session

// Exec prepares a streaming endpoint to execute a command in the container.
rpc Exec(ExecRequest) returns (ExecResponse) {}

// Attach prepares a streaming endpoint to attach to a running container.
rpc Attach(AttachRequest) returns (AttachResponse) {}

// PortForward prepares a streaming endpoint to forward ports from a PodSandbox.
rpc PortForward(PortForwardRequest) returns (PortForwardResponse) {}

message ExecResponse {
    // Fully qualified URL of the exec streaming server.
    string url = 1;
}

message AttachResponse {
    // Fully qualified URL of the attach streaming server.
    string url = 1;
}

message PortForwardResponse {
    // Fully qualified URL of the port-forward streaming server.
    string url = 1;
}

// Runtime is the interface to execute the commands and provide the streams.
type Runtime interface {
        Exec(ctx context.Context, containerID string, cmd []string, in io.Reader, out, err io.WriteCloser, tty bool, resize <-chan remotecommand.TerminalSize) error
        Attach(ctx context.Context, containerID string, in io.Reader, out, err io.WriteCloser, tty bool, resize <-chan remotecommand.TerminalSize) error
        PortForward(ctx context.Context, podSandboxID string, port int32, stream io.ReadWriteCloser) error
}

func (s StreamService) Exec(
    ctx context.Context,
    containerID string,
    cmd []string,
    stdin io.Reader, stdout, stderr io.WriteCloser,
    tty bool,
    resizeChan <-chan remotecommand.TerminalSize,
) error {
    // Retrieve the container by the provided containerID
    // …

    // Update the container status and verify that the workload is running
    // …

    // Execute the command and stream the data
    return s.runtimeServer.Runtime().ExecContainer(
        s.ctx, c, cmd, stdin, stdout, stderr, tty, resizeChan,
    )
}

func (s StreamService) PortForward(
    ctx context.Context,
    podSandboxID string,
    port int32,
    stream io.ReadWriteCloser,
) error {
    // Retrieve the pod sandbox by the provided podSandboxID
    sandboxID, err := s.runtimeServer.PodIDIndex().Get(podSandboxID)
    sb := s.runtimeServer.GetSandbox(sandboxID)
    // …

    // Get the network namespace path on disk for that sandbox
    netNsPath := sb.NetNsPath()
    // …

    // Enter the network namespace and stream the data
    return s.runtimeServer.Runtime().PortForwardContainer(
        ctx, sb.InfraContainer(), netNsPath, port, stream,
    )
}

kubectl describe volumesnapshot -n <namespace> <name>

kind: VolumeSnapshotContent
metadata:
  annotations:
    - snapshot.storage.kubernetes.io/allow-volume-mode-change: "true"
...

apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshotContent
metadata:
  annotations:
  - snapshot.storage.kubernetes.io/allow-volume-mode-change: "true"
  name: <volume-snapshot-content-name>
spec:
  deletionPolicy: Delete
  driver: hostpath.csi.k8s.io
  source:
    snapshotHandle: <snapshot-handle>
  sourceVolumeMode: Filesystem
  volumeSnapshotRef:
    name: <volume-snapshot-name>
    namespace: <namespace>

apiVersion: apiserver.config.k8s.io/v1beta1
kind: AuthorizationConfiguration
authorizers:
  - type: Webhook
    # Name used to describe the authorizer
    # This is explicitly used in monitoring machinery for metrics
    # Note:
    #   - Validation for this field is similar to how K8s labels are validated today.
    # Required, with no default
    name: webhook
    webhook:
      # The duration to cache 'authorized' responses from the webhook
      # authorizer.
      # Same as setting `--authorization-webhook-cache-authorized-ttl` flag
      # Default: 5m0s
      authorizedTTL: 30s
      # The duration to cache 'unauthorized' responses from the webhook
      # authorizer.
      # Same as setting `--authorization-webhook-cache-unauthorized-ttl` flag
      # Default: 30s
      unauthorizedTTL: 30s
      # Timeout for the webhook request
      # Maximum allowed is 30s.
      # Required, with no default.
      timeout: 3s
      # The API version of the authorization.k8s.io SubjectAccessReview to
      # send to and expect from the webhook.
      # Same as setting `--authorization-webhook-version` flag
      # Required, with no default
      # Valid values: v1beta1, v1
      subjectAccessReviewVersion: v1
      # MatchConditionSubjectAccessReviewVersion specifies the SubjectAccessReview
      # version the CEL expressions are evaluated against
      # Valid values: v1
      # Required, no default value
      matchConditionSubjectAccessReviewVersion: v1
      # Controls the authorization decision when a webhook request fails to
      # complete or returns a malformed response or errors evaluating
      # matchConditions.
      # Valid values:
      #   - NoOpinion: continue to subsequent authorizers to see if one of
      #     them allows the request
      #   - Deny: reject the request without consulting subsequent authorizers
      # Required, with no default.
      failurePolicy: Deny
      connectionInfo:
        # Controls how the webhook should communicate with the server.
        # Valid values:
        # - KubeConfig: use the file specified in kubeConfigFile to locate the
        #   server.
        # - InClusterConfig: use the in-cluster configuration to call the
        #   SubjectAccessReview API hosted by kube-apiserver. This mode is not
        #   allowed for kube-apiserver.
        type: KubeConfig
        # Path to KubeConfigFile for connection info
        # Required, if connectionInfo.Type is KubeConfig
        kubeConfigFile: /kube-system-authz-webhook.yaml
        # matchConditions is a list of conditions that must be met for a request to be sent to this
        # webhook. An empty list of matchConditions matches all requests.
        # There are a maximum of 64 match conditions allowed.
        #
        # The exact matching logic is (in order):
        #   1. If at least one matchCondition evaluates to FALSE, then the webhook is skipped.
        #   2. If ALL matchConditions evaluate to TRUE, then the webhook is called.
        #   3. If at least one matchCondition evaluates to an error (but none are FALSE):
        #      - If failurePolicy=Deny, then the webhook rejects the request
        #      - If failurePolicy=NoOpinion, then the error is ignored and the webhook is skipped
      matchConditions:
      # expression represents the expression which will be evaluated by CEL. Must evaluate to bool.
      # CEL expressions have access to the contents of the SubjectAccessReview in v1 version.
      # If version specified by subjectAccessReviewVersion in the request variable is v1beta1,
      # the contents would be converted to the v1 version before evaluating the CEL expression.
      #
      # Documentation on CEL: https://kubernetes.io/docs/reference/using-api/cel/
      #
      # only send resource requests to the webhook
      - expression: has(request.resourceAttributes)
      # only intercept requests to kube-system
      - expression: request.resourceAttributes.namespace == 'kube-system'
      # don't intercept requests from kube-system service accounts
      - expression: !('system:serviceaccounts:kube-system' in request.user.groups)
  - type: Node
    name: node
  - type: RBAC
    name: rbac
  - type: Webhook
    name: in-cluster-authorizer
    webhook:
      authorizedTTL: 5m
      unauthorizedTTL: 30s
      timeout: 3s
      subjectAccessReviewVersion: v1
      failurePolicy: NoOpinion
      connectionInfo:
        type: InClusterConfig

apiVersion: apiserver.config.k8s.io/v1beta1
kind: AuthorizationConfiguration
authorizers:
  - type: Webhook
    name: system-crd-protector
    webhook:
      unauthorizedTTL: 30s
      timeout: 3s
      subjectAccessReviewVersion: v1
      matchConditionSubjectAccessReviewVersion: v1
      failurePolicy: Deny
      connectionInfo:
        type: KubeConfig
        kubeConfigFile: /files/kube-system-authz-webhook.yaml
      matchConditions:
      # only send resource requests to the webhook
      - expression: has(request.resourceAttributes)
      # only intercept requests for CRDs
      - expression: request.resourceAttributes.resource.resource = "customresourcedefinitions"
      - expression: request.resourceAttributes.resource.group = ""
      # only intercept update, patch, delete, or deletecollection requests
      - expression: request.resourceAttributes.verb in ['update', 'patch', 'delete','deletecollection']
  - type: Node
  - type: RBAC

apiVersion: apiserver.config.k8s.io/v1beta1
kind: AuthorizationConfiguration
authorizers:
  - type: Webhook
    name: system-crd-protector
    webhook:
      unauthorizedTTL: 30s
      timeout: 3s
      subjectAccessReviewVersion: v1
      matchConditionSubjectAccessReviewVersion: v1
      failurePolicy: Deny
      connectionInfo:
        type: KubeConfig
        kubeConfigFile: /files/kube-system-authz-webhook.yaml
      matchConditions:
      # only send resource requests to the webhook
      - expression: has(request.resourceAttributes)
      # only intercept requests for CRDs
      - expression: request.resourceAttributes.resource.resource = "customresourcedefinitions"
      - expression: request.resourceAttributes.resource.group = ""
      # only intercept update, patch, delete, or deletecollection requests
      - expression: request.resourceAttributes.verb in ['update', 'patch', 'delete','deletecollection']
  - type: Node
  - type: RBAC
  - name: opa
    type: Webhook
    webhook:
      unauthorizedTTL: 30s
      timeout: 3s
      subjectAccessReviewVersion: v1
      matchConditionSubjectAccessReviewVersion: v1
      failurePolicy: Deny
      connectionInfo:
        type: KubeConfig
        kubeConfigFile: /files/opa-default-authz-webhook.yaml
      matchConditions:
      # only send resource requests to the webhook
      - expression: has(request.resourceAttributes)
      # only intercept requests to default namespace
      - expression: request.resourceAttributes.namespace == 'default'
      # don't intercept requests from default service accounts
      - expression: !('system:serviceaccounts:default' in request.user.groups)

kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
featureGates:
  StructuredAuthorizationConfiguration: true  # enabled by default in v1.30
kubeadmConfigPatches:
  - |
    kind: ClusterConfiguration
    metadata:
      name: config
    apiServer:
      extraArgs:
        authorization-config: "/files/authorization_config.yaml"
      extraVolumes:
      - name: files
        hostPath: "/files"
        mountPath: "/files"
        readOnly: true    
nodes:
- role: control-plane
  extraMounts:
  - hostPath: files
    containerPath: /files

apiVersion: apiserver.config.k8s.io/v1beta1
kind: AuthenticationConfiguration
# Someone with a valid token from either of these issuers could authenticate
# against this cluster.
jwt:
- issuer:
    url: https://issuer1.example.com
    audiences:
    - audience1
    - audience2
    audienceMatchPolicy: MatchAny
  claimValidationRules:
    expression: 'claims.hd == "example.com"'
    message: "the hosted domain name must be example.com"
  claimMappings:
    username:
      expression: 'claims.username'
    groups:
      expression: 'claims.groups'
    uid:
      expression: 'claims.uid'
    extra:
    - key: 'example.com/tenant'
      expression: 'claims.tenant'
  userValidationRules:
  - expression: "!user.username.startsWith('system:')"
    message: "username cannot use reserved system: prefix"
# second authenticator that exposes the discovery document at a different location
# than the issuer
- issuer:
    url: https://issuer2.example.com
    discoveryURL: https://discovery.example.com/.well-known/openid-configuration
    audiences:
    - audience3
    - audience4
    audienceMatchPolicy: MatchAny
  claimValidationRules:
    expression: 'claims.hd == "example.com"'
    message: "the hosted domain name must be example.com"
  claimMappings:
    username:
      expression: 'claims.username'
    groups:
      expression: 'claims.groups'
    uid:
      expression: 'claims.uid'
    extra:
    - key: 'example.com/tenant'
      expression: 'claims.tenant'
  userValidationRules:
  - expression: "!user.username.startsWith('system:')"
    message: "username cannot use reserved system: prefix"

--oidc-issuer-url=https://issuer.example.com
--oidc-client-id=example-client-id
--oidc-username-claim=username
--oidc-groups-claim=groups
--oidc-username-prefix=oidc:
--oidc-groups-prefix=oidc:
--oidc-required-claim="hd=example.com"
--oidc-required-claim="admin=true"
--oidc-ca-file=/path/to/ca.pem

apiVersion: apiserver.config.k8s.io/v1beta1
kind: AuthenticationConfiguration
jwt:
- issuer:
    url: https://issuer.example.com
    audiences:
    - example-client-id
    certificateAuthority: <value is the content of file /path/to/ca.pem>
  claimMappings:
    username:
      claim: username
      prefix: "oidc:"
    groups:
      claim: groups
      prefix: "oidc:"
  claimValidationRules:
  - claim: hd
    requiredValue: "example.com"
  - claim: admin
    requiredValue: "true"

func verifyDeployment(deploy *appsv1.Deployment) error {
	var errs []error
	for i, c := range deploy.Spec.Template.Spec.Containers {
		if c.Name == "" {
			return fmt.Errorf("container %d has no name", i)
		}
		if c.SecurityContext == nil {
			errs = append(errs, fmt.Errorf("container %q does not have SecurityContext", c.Name))
		}
		if c.SecurityContext.RunAsNonRoot == nil || !*c.SecurityContext.RunAsNonRoot {
			errs = append(errs, fmt.Errorf("container %q must set RunAsNonRoot to true in its SecurityContext", c.Name))
		}
		if c.SecurityContext.ReadOnlyRootFilesystem == nil || !*c.SecurityContext.ReadOnlyRootFilesystem {
			errs = append(errs, fmt.Errorf("container %q must set ReadOnlyRootFilesystem to true in its SecurityContext", c.Name))
		}
		if c.SecurityContext.AllowPrivilegeEscalation != nil && *c.SecurityContext.AllowPrivilegeEscalation {
			errs = append(errs, fmt.Errorf("container %q must NOT set AllowPrivilegeEscalation to true in its SecurityContext", c.Name))
		}
		if c.SecurityContext.Privileged != nil && *c.SecurityContext.Privileged {
			errs = append(errs, fmt.Errorf("container %q must NOT set Privileged to true in its SecurityContext", c.Name))
		}
	}
	return errors.NewAggregate(errs)
}

apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingAdmissionPolicy
metadata:
  name: "pod-security.policy.example.com"
spec:
  failurePolicy: Fail
  matchConstraints:
    resourceRules:
    - apiGroups:   ["apps"]
      apiVersions: ["v1"]
      operations:  ["CREATE", "UPDATE"]
      resources:   ["deployments"]
  validations:
  - expression: object.spec.template.spec.containers.all(c, has(c.securityContext) && has(c.securityContext.runAsNonRoot) && c.securityContext.runAsNonRoot)
    message: 'all containers must set runAsNonRoot to true'
  - expression: object.spec.template.spec.containers.all(c, has(c.securityContext) && has(c.securityContext.readOnlyRootFilesystem) && c.securityContext.readOnlyRootFilesystem)
    message: 'all containers must set readOnlyRootFilesystem to true'
  - expression: object.spec.template.spec.containers.all(c, !has(c.securityContext) || !has(c.securityContext.allowPrivilegeEscalation) || !c.securityContext.allowPrivilegeEscalation)
    message: 'all containers must NOT set allowPrivilegeEscalation to true'
  - expression: object.spec.template.spec.containers.all(c, !has(c.securityContext) || !has(c.securityContext.Privileged) || !c.securityContext.Privileged)
    message: 'all containers must NOT set privileged to true'

kubectl get -oyaml validatingadmissionpolicies/pod-security.policy.example.com

  status:
    typeChecking:
      expressionWarnings:
      - fieldRef: spec.validations[3].expression
        warning: |
          apps/v1, Kind=Deployment: ERROR: <input>:1:76: undefined field 'Privileged'
           | object.spec.template.spec.containers.all(c, !has(c.securityContext) || !has(c.securityContext.Privileged) || !c.securityContext.Privileged)
           | ...........................................................................^
          ERROR: <input>:1:128: undefined field 'Privileged'
           | object.spec.template.spec.containers.all(c, !has(c.securityContext) || !has(c.securityContext.Privileged) || !c.securityContext.Privileged)
           | ...............................................................................................................................^          

apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingAdmissionPolicy
metadata:
  name: "pod-security.policy.example.com"
spec:
  failurePolicy: Fail
  matchConstraints:
    resourceRules:
    - apiGroups:   ["apps"]
      apiVersions: ["v1"]
      operations:  ["CREATE", "UPDATE"]
      resources:   ["deployments"]
  validations:
  - expression: object.spec.template.spec.containers.all(c, has(c.securityContext) && has(c.securityContext.runAsNonRoot) && c.securityContext.runAsNonRoot)
    message: 'all containers must set runAsNonRoot to true'
  - expression: object.spec.template.spec.containers.all(c, has(c.securityContext) && has(c.securityContext.readOnlyRootFilesystem) && c.securityContext.readOnlyRootFilesystem)
    message: 'all containers must set readOnlyRootFilesystem to true'
  - expression: object.spec.template.spec.containers.all(c, !has(c.securityContext) || !has(c.securityContext.allowPrivilegeEscalation) || !c.securityContext.allowPrivilegeEscalation)
    message: 'all containers must NOT set allowPrivilegeEscalation to true'
  - expression: object.spec.template.spec.containers.all(c, !has(c.securityContext) || !has(c.securityContext.privileged) || !c.securityContext.privileged)
    message: 'all containers must NOT set privileged to true'

kubectl create namespace policy-test

apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingAdmissionPolicyBinding
metadata:
  name: "pod-security.policy-binding.example.com"
spec:
  policyName: "pod-security.policy.example.com"
  validationActions: ["Warn"]
  matchResources:
    namespaceSelector:
      matchLabels:
        "kubernetes.io/metadata.name": "policy-test"

kubectl create -n policy-test -f- <<EOF
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: nginx
  name: nginx
spec:
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx
        name: nginx
        securityContext:
          privileged: true
          allowPrivilegeEscalation: true
EOF

Warning: Validation failed for ValidatingAdmissionPolicy 'pod-security.policy.example.com' with binding 'pod-security.policy-binding.example.com': all containers must set runAsNonRoot to true
Warning: Validation failed for ValidatingAdmissionPolicy 'pod-security.policy.example.com' with binding 'pod-security.policy-binding.example.com': all containers must set readOnlyRootFilesystem to true
Warning: Validation failed for ValidatingAdmissionPolicy 'pod-security.policy.example.com' with binding 'pod-security.policy-binding.example.com': all containers must NOT set allowPrivilegeEscalation to true
Warning: Validation failed for ValidatingAdmissionPolicy 'pod-security.policy.example.com' with binding 'pod-security.policy-binding.example.com': all containers must NOT set privileged to true
Error from server: error when creating "STDIN": admission webhook "webhook.example.com" denied the request: [container "nginx" must set RunAsNonRoot to true in its SecurityContext, container "nginx" must set ReadOnlyRootFilesystem to true in its SecurityContext, container "nginx" must NOT set AllowPrivilegeEscalation to true in its SecurityContext, container "nginx" must NOT set Privileged to true in its SecurityContext]

apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingAdmissionPolicy
metadata:
  name: "pod-security.policy.example.com"
spec:
  failurePolicy: Fail
  matchConstraints:
    resourceRules:
    - apiGroups:   ["apps"]
      apiVersions: ["v1"]
      operations:  ["CREATE", "UPDATE"]
      resources:   ["deployments"]
  variables:
  - name: containers
    expression: object.spec.template.spec.containers
  - name: securityContexts
    expression: 'variables.containers.map(c, c.?securityContext)'
  validations:
  - expression: variables.securityContexts.all(c, c.?runAsNonRoot == optional.of(true))
    message: 'all containers must set runAsNonRoot to true'
  - expression: variables.securityContexts.all(c, c.?readOnlyRootFilesystem == optional.of(true))
    message: 'all containers must set readOnlyRootFilesystem to true'
  - expression: variables.securityContexts.all(c, c.?allowPrivilegeEscalation != optional.of(true))
    message: 'all containers must NOT set allowPrivilegeEscalation to true'
  - expression: variables.securityContexts.all(c, c.?privileged != optional.of(true))
    message: 'all containers must NOT set privileged to true'

apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingAdmissionPolicyBinding
metadata:
  name: "pod-security.policy-binding.example.com"
spec:
  policyName: "pod-security.policy.example.com"
  validationActions: ["Deny"]
  matchResources:
    namespaceSelector:
      matchLabels:
        "kubernetes.io/metadata.name": "policy-test"

kubectl create -n policy-test -f- <<EOF
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: nginx
  name: nginx
spec:
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx
        name: nginx
        securityContext:
          privileged: true
          allowPrivilegeEscalation: true
EOF

The deployments "nginx" is invalid: : ValidatingAdmissionPolicy 'pod-security.policy.example.com' with binding 'pod-security.policy-binding.example.com' denied request: all containers must set runAsNonRoot to true

histogram_quantile(0.95, sum(rate(apiserver_validating_admission_policy_check_duration_seconds_bucket{policy="pod-security.policy.example.com"}[5m])) by (le)) 

rate(apiserver_validating_admission_policy_check_total{policy="pod-security.policy.example.com"}[5m])

---
apiVersion: v1
kind: Pod
spec:
  volumes:
    - name: mnt
      hostPath:
        path: /mnt
  containers:
    - volumeMounts:
        - name: mnt
          mountPath: /mnt
          readOnly: true

---
apiVersion: v1
kind: Pod
spec:
  volumes:
    - name: mnt
      hostPath:
        path: /mnt
  containers:
    - volumeMounts:
        - name: mnt
          mountPath: /mnt
          readOnly: true
          # NEW
          # Possible values are `Enabled`, `IfPossible`, and `Disabled`.
          # Needs to be specified in conjunction with `readOnly: true`.
          recursiveReadOnly: Enabled
arch: amd64
platform: metal
secureboot: false
version: v1.6.4
input:
  kernel:
    path: /usr/install/amd64/vmlinuz
  initramfs:
    path: /usr/install/amd64/initramfs.xz
  baseInstaller:
    imageRef: ghcr.io/siderolabs/installer:v1.6.4
  systemExtensions:
    - imageRef: ghcr.io/siderolabs/amd-ucode:20240115
    - imageRef: ghcr.io/siderolabs/amdgpu-firmware:20240115
    - imageRef: ghcr.io/siderolabs/bnx2-bnx2x:20240115
    - imageRef: ghcr.io/siderolabs/i915-ucode:20240115
    - imageRef: ghcr.io/siderolabs/intel-ice-firmware:20240115
    - imageRef: ghcr.io/siderolabs/intel-ucode:20231114
    - imageRef: ghcr.io/siderolabs/qlogic-firmware:20240115
    - imageRef: ghcr.io/siderolabs/drbd:9.2.6-v1.6.4
    - imageRef: ghcr.io/siderolabs/zfs:2.1.14-v1.6.4
output:
  kind: installer
  outFormat: raw

cat config.yaml | docker run --rm -i -v /dev:/dev --privileged "ghcr.io/siderolabs/imager:v1.6.4" - 

NAMESPACE                        NAME                        AGE    READY   STATUS
cozy-cert-manager                cert-manager                4m1s   True    Release reconciliation succeeded
cozy-cert-manager                cert-manager-issuers        4m1s   True    Release reconciliation succeeded
cozy-cilium                      cilium                      4m1s   True    Release reconciliation succeeded
cozy-cluster-api                 capi-operator               4m1s   True    Release reconciliation succeeded
cozy-cluster-api                 capi-providers              4m1s   True    Release reconciliation succeeded
cozy-dashboard                   dashboard                   4m1s   True    Release reconciliation succeeded
cozy-fluxcd                      cozy-fluxcd                 4m1s   True    Release reconciliation succeeded
cozy-grafana-operator            grafana-operator            4m1s   True    Release reconciliation succeeded
cozy-kamaji                      kamaji                      4m1s   True    Release reconciliation succeeded
cozy-kubeovn                     kubeovn                     4m1s   True    Release reconciliation succeeded
cozy-kubevirt-cdi                kubevirt-cdi                4m1s   True    Release reconciliation succeeded
cozy-kubevirt-cdi                kubevirt-cdi-operator       4m1s   True    Release reconciliation succeeded
cozy-kubevirt                    kubevirt                    4m1s   True    Release reconciliation succeeded
cozy-kubevirt                    kubevirt-operator           4m1s   True    Release reconciliation succeeded
cozy-linstor                     linstor                     4m1s   True    Release reconciliation succeeded
cozy-linstor                     piraeus-operator            4m1s   True    Release reconciliation succeeded
cozy-mariadb-operator            mariadb-operator            4m1s   True    Release reconciliation succeeded
cozy-metallb                     metallb                     4m1s   True    Release reconciliation succeeded
cozy-monitoring                  monitoring                  4m1s   True    Release reconciliation succeeded
cozy-postgres-operator           postgres-operator           4m1s   True    Release reconciliation succeeded
cozy-rabbitmq-operator           rabbitmq-operator           4m1s   True    Release reconciliation succeeded
cozy-redis-operator              redis-operator              4m1s   True    Release reconciliation succeeded
cozy-telepresence                telepresence                4m1s   True    Release reconciliation succeeded
cozy-victoria-metrics-operator   victoria-metrics-operator   4m1s   True    Release reconciliation succeeded

./op-readiness --kubeconfig $KUBE_CONFIG --category Core.Concurrent

/test operational-tests-capz-windows-2019

apiVersion: v1
kind: Pod
metadata:
  name: pod
spec:
  containers:
    - name: container
      image: nginx:1.25.3
      securityContext:
        seccompProfile:
          type: Localhost
          localhostProfile: nginx-1.25.3.json

kubectl get pods

NAME   READY   STATUS                 RESTARTS   AGE
pod    0/1     CreateContainerError   0          38s

kubectl describe pod/pod | tail

Tolerations:                 node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                             node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
  Type     Reason     Age                 From               Message
  ----     ------     ----                ----               -------
  Normal   Scheduled  117s                default-scheduler  Successfully assigned default/pod to 127.0.0.1
  Normal   Pulling    117s                kubelet            Pulling image "nginx:1.25.3"
  Normal   Pulled     111s                kubelet            Successfully pulled image "nginx:1.25.3" in 5.948s (5.948s including waiting)
  Warning  Failed     7s (x10 over 111s)  kubelet            Error: setup seccomp: unable to load local profile "/var/lib/kubelet/seccomp/nginx-1.25.3.json": open /var/lib/kubelet/seccomp/nginx-1.25.3.json: no such file or directory
  Normal   Pulled     7s (x9 over 111s)   kubelet            Container image "nginx:1.25.3" already present on machine

apiVersion: v1
kind: Pod
metadata:
  name: pod
  annotations:
    seccomp-profile.kubernetes.cri-o.io/POD: quay.io/crio/seccomp:v2
spec: …

oras pull quay.io/crio/seccomp:v2

Downloading 92d8ebfa89aa seccomp.json
Downloaded  92d8ebfa89aa seccomp.json
Pulled [registry] quay.io/crio/seccomp:v2
Digest: sha256:f0205dac8a24394d9ddf4e48c7ac201ca7dcfea4c554f7ca27777a7f8c43ec1b

jq . seccomp.json | head

{
  "defaultAction": "SCMP_ACT_ERRNO",
  "defaultErrnoRet": 38,
  "defaultErrno": "ENOSYS",
  "archMap": [
    {
      "architecture": "SCMP_ARCH_X86_64",
      "subArchitectures": [
        "SCMP_ARCH_X86",
        "SCMP_ARCH_X32"

# Inspect the plain manifest of the image
skopeo inspect --raw docker://quay.io/crio/seccomp:v2 | jq .

{
  "schemaVersion": 2,
  "mediaType": "application/vnd.oci.image.manifest.v1+json",
  "config":
    {
      "mediaType": "application/vnd.cncf.seccomp-profile.config.v1+json",
      "digest": "sha256:ca3d163bab055381827226140568f3bef7eaac187cebd76878e0b63e9e442356",
      "size": 3,
    },
  "layers":
    [
      {
        "mediaType": "application/vnd.oci.image.layer.v1.tar",
        "digest": "sha256:92d8ebfa89aa6dd752c6443c27e412df1b568d62b4af129494d7364802b2d476",
        "size": 18853,
        "annotations": { "org.opencontainers.image.title": "seccomp.json" },
      },
    ],
  "annotations": { "org.opencontainers.image.created": "2024-02-26T09:03:30Z" },
}

[crio.runtime]
default_runtime = "crun"

[crio.runtime.runtimes.crun]
allowed_annotations = [
    "seccomp-profile.kubernetes.cri-o.io",
]

cat pod.yaml

apiVersion: v1
kind: Pod
metadata:
  name: pod
spec:
  containers:
    - name: container
      image: nginx:1.25.3
      securityContext:
        seccompProfile:
          type: Unconfined

kubectl apply -f pod.yaml

kubectl get pods

NAME   READY   STATUS    RESTARTS   AGE
pod    1/1     Running   0          15s

export CONTAINER_ID=$(sudo crictl ps --name container -q)
sudo crictl inspect $CONTAINER_ID | jq .info.runtimeSpec.linux.seccomp

null

apiVersion: v1
kind: Pod
metadata:
  name: pod
  annotations:
    seccomp-profile.kubernetes.cri-o.io/container: quay.io/crio/seccomp:v2
spec:
  containers:
    - name: container
      image: nginx:1.25.3

kubectl delete pod/pod

pod "pod" deleted

kubectl apply -f pod.yaml

pod/pod created

WARN[…] Allowed annotations are specified for workload [seccomp-profile.kubernetes.cri-o.io]
INFO[…] Found container specific seccomp profile annotation: seccomp-profile.kubernetes.cri-o.io/container=quay.io/crio/seccomp:v2  id=26ddcbe6-6efe-414a-88fd-b1ca91979e93 name=/runtime.v1.RuntimeService/CreateContainer
INFO[…] Pulling OCI artifact from ref: quay.io/crio/seccomp:v2  id=26ddcbe6-6efe-414a-88fd-b1ca91979e93 name=/runtime.v1.RuntimeService/CreateContainer
INFO[…] Retrieved OCI artifact seccomp profile of len: 18853  id=26ddcbe6-6efe-414a-88fd-b1ca91979e93 name=/runtime.v1.RuntimeService/CreateContainer

export CONTAINER_ID=$(sudo crictl ps --name container -q)
sudo crictl inspect $CONTAINER_ID | jq .info.runtimeSpec.linux.seccomp | head

{
  "defaultAction": "SCMP_ACT_ERRNO",
  "defaultErrnoRet": 38,
  "architectures": [
    "SCMP_ARCH_X86_64",
    "SCMP_ARCH_X86",
    "SCMP_ARCH_X32"
  ],
  "syscalls": [
    {

apiVersion: v1
kind: Pod
metadata:
  name: pod
  annotations:
    seccomp-profile.kubernetes.cri-o.io/POD: quay.io/crio/seccomp:v2
spec:
  containers:
    - name: container
      image: nginx:1.25.3

podman build \
    --annotation seccomp-profile.kubernetes.cri-o.io=quay.io/crio/seccomp:v2 \
    -t quay.io/crio/nginx-seccomp:v2 .

skopeo inspect --raw docker://quay.io/crio/nginx-seccomp:v2 |
    jq '.annotations."seccomp-profile.kubernetes.cri-o.io"'

"quay.io/crio/seccomp:v2"

apiVersion: v1
kind: Pod
metadata:
  name: pod
  # no Pod annotations set
spec:
  containers:
    - name: container
      image: quay.io/crio/nginx-seccomp:v2

kubectl delete pod/pod

pod "pod" deleted

kubectl apply -f pod.yaml

pod/pod created

INFO[…] Found image specific seccomp profile annotation: seccomp-profile.kubernetes.cri-o.io=quay.io/crio/seccomp:v2  id=c1f22c59-e30e-4046-931d-a0c0fdc2c8b7 name=/runtime.v1.RuntimeService/CreateContainer
INFO[…] Pulling OCI artifact from ref: quay.io/crio/seccomp:v2  id=c1f22c59-e30e-4046-931d-a0c0fdc2c8b7 name=/runtime.v1.RuntimeService/CreateContainer
INFO[…] Retrieved OCI artifact seccomp profile of len: 18853  id=c1f22c59-e30e-4046-931d-a0c0fdc2c8b7 name=/runtime.v1.RuntimeService/CreateContainer
INFO[…] Created container 116a316cd9a11fe861dd04c43b94f45046d1ff37e2ed05a4e4194fcaab29ee63: default/pod/container  id=c1f22c59-e30e-4046-931d-a0c0fdc2c8b7 name=/runtime.v1.RuntimeService/CreateContainer

export CONTAINER_ID=$(sudo crictl ps --name container -q)
sudo crictl inspect $CONTAINER_ID | jq .info.runtimeSpec.linux.seccomp | head

{
  "defaultAction": "SCMP_ACT_ERRNO",
  "defaultErrnoRet": 38,
  "architectures": [
    "SCMP_ARCH_X86_64",
    "SCMP_ARCH_X86",
    "SCMP_ARCH_X32"
  ],
  "syscalls": [
    {

skopeo inspect --raw docker://quay.io/crio/nginx-seccomp:v2-container |
    jq '.annotations."seccomp-profile.kubernetes.cri-o.io/container1"'

"quay.io/crio/seccomp:v2"

echo "{}" > config.json
oras push \
    --config config.json:application/vnd.cncf.seccomp-profile.config.v1+json \
     quay.io/crio/seccomp:v2 seccomp.json

[storage]
# Default storage driver
driver = "overlay"
# Temporary storage location
runroot = "/var/run/containers/storage"
# Primary read/write location of container storage 
graphroot = "/var/lib/containers/storage"

semanage fcontext -a -e /var/lib/containers/storage <YOUR-STORAGE-PATH>
restorecon -R -v <YOUR-STORAGE-PATH>

apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: "192.168.0.8"
port: 20250
serializeImagePulls: false
evictionHard:
    memory.available:  "100Mi"
    nodefs.available:  "10%"
    nodefs.inodesFree: "5%"
    imagefs.available: "15%"
    imagefs.inodesFree: "5%"
evictionSoft:
    memory.available:  "100Mi"
    nodefs.available:  "10%"
    nodefs.inodesFree: "5%"
    imagefs.available: "15%"
    imagefs.inodesFree: "5%"
evictionSoftGracePeriod:
    memory.available:  "1m30s"
    nodefs.available:  "2m"
    nodefs.inodesFree: "2m"
    imagefs.available: "2m"
    imagefs.inodesFree: "2m"
evictionMaxPodGracePeriod: 60s

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: single-writer-only
spec:
  accessModes:
  - ReadWriteOncePod # Allows only a single pod to access single-writer-only.
  resources:
    requests:
      storage: 1Gi

---
apiVersion: v1
kind: Secret
metadata:
  name: test-secret
  namespace: default
data:
  stringData:
    username: admin
    password: t0p-Secret

---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: csi-blockstorage-sc
parameters:
  csi.storage.k8s.io/node-expand-secret-name: test-secret
  csi.storage.k8s.io/node-expand-secret-namespace: default
provisioner: blockstorage.cloudprovider.example
reclaimPolicy: Delete
volumeBindingMode: Immediate
allowVolumeExpansion: true

--feature-gates="...,VolumeAttributesClass=true"

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: csi-sc-example
provisioner: pd.csi.storage.gke.io
parameters:
  disk-type: "hyperdisk-balanced"
volumeBindingMode: WaitForFirstConsumer

apiVersion: storage.k8s.io/v1alpha1
kind: VolumeAttributesClass
metadata:
  name: silver
driverName: pd.csi.storage.gke.io
parameters:
  provisioned-iops: "3000"
  provisioned-throughput: "50"

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: test-pv-claim
spec:
  storageClassName: csi-sc-example
  volumeAttributesClassName: silver
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 64Gi

kubectl get pvc

apiVersion: storage.k8s.io/v1alpha1
kind: VolumeAttributesClass
metadata:
  name: gold
driverName: pd.csi.storage.gke.io
parameters:
  iops: "4000"
  throughput: "60"

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: test-pv-claim
spec:
  storageClassName: csi-sc-example
  volumeAttributesClassName: gold
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 64Gi

kubectl describe pvc <PVC_NAME>

--feature-gates=DisableCloudProviders=false,DisableKubeletCloudCredentialProviders=false

apiVersion: gateway.networking.k8s.io/v1alpha2
kind: BackendTLSPolicy
metadata:
  name: tls-upstream-dev
spec:
  targetRef:
    kind: Service
    name: dev-service
    group: ""
  tls:
    wellKnownCACerts: "System"
    hostname: dev.example.com

apiVersion: gateway.networking.k8s.io/v1alpha2
kind: BackendTLSPolicy
metadata:
  name: tls-upstream-auth
spec:
  targetRef:
    kind: Service
    name: auth-service
    group: ""
  tls:
    caCertRefs:
      - kind: ConfigMapReference
        name: auth-cert
        group: ""
    hostname: auth.example.com

apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: timeout-example
spec:
  parentRefs:
  - name: example-gateway
  rules:
  - matches:
    - path:
        type: PathPrefix
        value: /timeout
    timeouts:
      request: 10s
      backendRequest: 2s
    backendRefs:
    - name: timeout-svc
      port: 8080

apiVersion: gateway.networking.k8s.io/v1
kind: Gateway
metadata:
  name: hello-world
spec:
  infrastructure:
    labels:
      app.kubernetes.io/name: hello-world

apiVersion: v1
kind: Service
metadata:
  name: store
spec:
  selector:
    app: store
  ports:
  - protocol: TCP
    appProtocol: kubernetes.io/h2c
    port: 8080
    targetPort: 8080

# List all policies in the cluster. This will also give the resource they bind
# to.
gwctl get policies -A
# List all available policy types.
gwctl get policycrds
# Describe all HTTPRoutes in namespace ns2. (Output includes effective policies)
gwctl describe httproutes -n ns2
# Describe a single HTTPRoute in the default namespace. (Output includes
# effective policies)
gwctl describe httproutes my-httproute-1
# Describe all Gateways across all namespaces. (Output includes effective
# policies)
gwctl describe gateways -A
# Describe a single GatewayClass. (Output includes effective policies)
gwctl describe gatewayclasses foo-com-external-gateway-class

go install github.com/kubernetes-sigs/ingress2gateway@v0.1.0

ingress2gateway print

--feature-gates="...,PersistentVolumeLastPhaseTransitionTime=true"

kubectl get pv <pv-name> -o jsonpath='{.status.lastPhaseTransitionTime}'

mkdir ~/tmp

cat > /etc/sysctl.d/99-k8s-cri.conf << EOF
net.bridge.bridge-nf-call-iptables=1
net.ipv4.ip_forward=1
net.bridge.bridge-nf-call-ip6tables=1
EOF

echo -e overlay\\nbr_netfilter > /etc/modules-load.d/k8s.conf

dnf -y install iptables-legacy

update-alternatives --set iptables /usr/sbin/iptables-legacy

touch /etc/systemd/zram-generator.conf
systemctl mask systemd-zram-setup@.service
sed -i '/ swap / s/^$.*$$/#\1/g' /etc/fstab

systemctl disable --now firewalld

systemctl disable --now systemd-resolved

sed -i '/\[main\]/a dns=default' /etc/NetworkManager/NetworkManager.conf

unlink /etc/resolv.conf || true
touch /etc/resolv.conf

setenforce 0

reboot

# Set architecture variables
UARCH=$(uname -m)

if [["$UARCH" == "arm64" || "$UARCH" == "aarch64"]]; then

    ARCH="aarch64"
    K8s_ARCH="arm64"

else

    ARCH="x86_64"
    K8s_ARCH="amd64"

fi

CNI_PLUGINS_VERSION="v1.3.0"
CRICTL_VERSION="v1.27.0"
KUBE_RELEASE="v1.27.3"
RELEASE_VERSION="v0.15.1"
K9S_VERSION="v0.27.4"

mkdir download && cd download

curl -O https://download.docker.com/linux/fedora/37/${ARCH}/stable/Packages/docker-ce-cli-23.0.2-1.fc37.${ARCH}.rpm

curl -O https://download.docker.com/linux/fedora/37/${ARCH}/stable/Packages/containerd.io-1.6.19-3.1.fc37.${ARCH}.rpm

curl -O https://download.docker.com/linux/fedora/37/${ARCH}/stable/Packages/docker-compose-plugin-2.17.2-1.fc37.${ARCH}.rpm

curl -O https://download.docker.com/linux/fedora/37/${ARCH}/stable/Packages/docker-ce-rootless-extras-23.0.2-1.fc37.${ARCH}.rpm

curl -O https://download.docker.com/linux/fedora/37/${ARCH}/stable/Packages/docker-ce-23.0.2-1.fc37.${ARCH}.rpm

curl -O https://download-ib01.fedoraproject.org/pub/fedora/linux/releases/37/Everything/${ARCH}/os/Packages/l/libcgroup-3.0-1.fc37.${ARCH}.rpm

echo -e "\nDownload Kubernetes Binaries"

curl -L -O "https://github.com/containernetworking/plugins/releases/download/${CNI_PLUGINS_VERSION}/cni-plugins-linux-${K8s_ARCH}-${CNI_PLUGINS_VERSION}.tgz"

curl -L -O "https://github.com/kubernetes-sigs/cri-tools/releases/download/${CRICTL_VERSION}/crictl-${CRICTL_VERSION}-linux-${K8s_ARCH}.tar.gz"

curl -L --remote-name-all https://dl.k8s.io/release/${KUBE_RELEASE}/bin/linux/${K8s_ARCH}/{kubeadm,kubelet}

curl -L -O "https://raw.githubusercontent.com/kubernetes/release/${RELEASE_VERSION}/cmd/kubepkg/templates/latest/deb/kubelet/lib/systemd/system/kubelet.service"

curl -L -O "https://raw.githubusercontent.com/kubernetes/release/${RELEASE_VERSION}/cmd/kubepkg/templates/latest/deb/kubeadm/10-kubeadm.conf"

curl -L -O "https://dl.k8s.io/release/${KUBE_RELEASE}/bin/linux/${K8s_ARCH}/kubectl"

echo -e "\nDownload dependencies"

curl -O "https://dl.fedoraproject.org/pub/fedora/linux/releases/37/Everything/${ARCH}/os/Packages/s/socat-1.7.4.2-3.fc37.${ARCH}.rpm"

curl -O "https://dl.fedoraproject.org/pub/fedora/linux/releases/37/Everything/${ARCH}/os/Packages/l/libcgroup-3.0-1.fc37.${ARCH}.rpm"

curl -O "https://dl.fedoraproject.org/pub/fedora/linux/releases/37/Everything/${ARCH}/os/Packages/c/conntrack-tools-1.4.6-4.fc37.${ARCH}.rpm"

curl -LO "https://github.com/derailed/k9s/releases/download/${K9S_VERSION}/k9s_Linux_${K8s_ARCH}.tar.gz"

curl -LO "https://raw.githubusercontent.com/flannel-io/flannel/master/Documentation/kube-flannel.yml"

images=(
    "registry.k8s.io/kube-apiserver:${KUBE_RELEASE}"
    "registry.k8s.io/kube-controller-manager:${KUBE_RELEASE}"
    "registry.k8s.io/kube-scheduler:${KUBE_RELEASE}"
    "registry.k8s.io/kube-proxy:${KUBE_RELEASE}"
    "registry.k8s.io/pause:3.9"
    "registry.k8s.io/etcd:3.5.7-0"
    "registry.k8s.io/coredns/coredns:v1.10.1"
    "registry:2.8.2"
    "flannel/flannel:v0.22.0"
    "flannel/flannel-cni-plugin:v1.1.2"
)

for image in "${images[@]}"; do
    # Pull the image from the registry
    docker pull "$image"

    # Save the image to a tar file on the local disk
    image_name=$(echo "$image" | sed 's|/|_|g' | sed 's/:/_/g')
    docker save -o "${image_name}.tar" "$image"

done

scp -i <<SSH_KEY>> <<FILE>> <<AIRGAP_VM_USER>>@<<AIRGAP_VM_IP>>:~/tmp/

UARCH=$(uname -m)
# Set architecture variables

if [["$UARCH" == "arm64" || "$UARCH" == "aarch64"]]; then

    ARCH="aarch64"
    K8s_ARCH="arm64"

else

    ARCH="x86_64"
    K8s_ARCH="amd64"

fi

# Set environment variables
CNI_PLUGINS_VERSION="v1.3.0"
CRICTL_VERSION="v1.27.0"
KUBE_RELEASE="v1.27.3"
RELEASE_VERSION="v0.15.1"
K9S_VERSION="v0.27.4"

cd ~/tmp/

dnf -y install ./*.rpm

mkdir -p /opt/cni/bin
tar -C /opt/cni/bin -xz -f "cni-plugins-linux-${K8s_ARCH}-v1.3.0.tgz"
tar -C /usr/local/bin-xz -f "crictl-v1.27.0-linux-${K8s_ARCH}.tar.gz"

chmod +x kubeadm kubelet kubectl
mv kubeadm kubelet kubectl /usr/local/bin

mkdir -p /etc/systemd/system/kubelet.service.d

sed "s:/usr/bin:/usr/local/bin:g" 10-kubeadm.conf > /etc/systemd/system/kubelet.service.d/10-kubeadm.conf

sed -i 's/^disabled_plugins = \["cri"\]/#&/' /etc/containerd/config.toml

echo '{

"exec-opts": ["native.cgroupdriver=systemd"],

"insecure-registries" : ["localhost:5000"],

"allow-nondistributable-artifacts": ["localhost:5000"],

"log-driver": "json-file",

"log-opts": {

"max-size": "100m"

},

"group": "rnd",

"storage-driver": "overlay2",

"storage-opts": [

"overlay2.override_kernel_check=true"

]

}' > /etc/docker/daemon.json

systemctl restart docker
systemctl enable docker

systemctl enable --now containerd
systemctl enable --now kubelet

docker load -i registry_2.8.2.tar
docker run -d -p 5000:5000 --restart=always --name registry registry:2.8.2

docker load -i flannel_flannel_v0.22.0.tar
docker load -i flannel_flannel-cni-plugin_v1.1.2.tar
docker tag flannel/flannel:v0.22.0 localhost:5000/flannel/flannel:v0.22.0
docker tag flannel/flannel-cni-plugin:v1.1.1 localhost:5000/flannel/flannel-cni-plugin:v1.1.1
docker push localhost:5000/flannel/flannel:v0.22.0
docker push localhost:5000/flannel/flannel-cni-plugin:v1.1.1

images_files=(
    "registry.k8s.io/kube-apiserver:${KUBE_RELEASE}"
    "registry.k8s.io/kube-controller-manager:${KUBE_RELEASE}"
    "registry.k8s.io/kube-scheduler:${KUBE_RELEASE}"
    "registry.k8s.io/kube-proxy:${KUBE_RELEASE}"
    "registry.k8s.io/pause:3.9"
    "registry.k8s.io/etcd:3.5.7-0"
    "registry.k8s.io/coredns/coredns:v1.10.1"
    
)


for index in "${!image_files[@]}"; do

    if [[-f "${image_files[$index]}" ]]; then

        # The below line loads the images where they need to be on the VM
        ctr -n k8s.io images import ${image_files[$index]}

    else

        echo "File ${image_files[$index]} not found!" 1>&2

    fi

done

if systemctl is-active --quiet kubelet; then

    # Reset the Kubernetes cluster

    echo "A Kubernetes cluster is already running. Resetting the cluster..."

    kubeadm reset -f

fi

# OK for a demo; use secure credentials in production!

DOCKER_USER=user
DOCKER_PASS=pass
echo ${DOCKER_PASS} | docker login --username=${DOCKER_USER} --password-stdin localhost:5000

echo "---

apiVersion: kubeadm.k8s.io/v1beta3
kind: ClusterConfiguration
clusterName: kubernetes
kubernetesVersion: v1.27.3
networking:
    dnsDomain: cluster.local
    podSubnet: 10.244.0.0/16 # --pod-network-cidr
    serviceSubnet: 10.96.0.0/12
---
apiVersion: kubeadm.k8s.io/v1beta3
kind: InitConfiguration
localAPIEndpoint:
    advertiseAddress: 10.10.10.10 # Update to the IP address of the air gap VM
    bindPort: 6443
nodeRegistration:
    criSocket: unix:///run/containerd/containerd.sock # or rely on autodetection
    name: airgap # this must match the hostname of the air gap VM
# Since this is a single node cluster, this taint has to be commented out,
# otherwise the coredns pods will not come up.
# taints:
# - effect: NoSchedule
# key: node-role.kubernetes.io/master" > kubeadm_cluster.yaml

kubeadm init --config kubeadm_config.yaml

export KUBECONFIG=/etc/kubernetes/admin.conf

until kubectl get nodes; do
    echo -e "\nWaiting for API server to respond..." 1>&2
    sleep 5

done

sed -i 's/image: docker\.io/image: localhost:5000/g' kube-flannel.yaml
kubectl apply -f kube-flannel.yaml

UARCH=$(uname -m)
# Reset the architecture variables if needed
if [["$UARCH" == "arm64" || "$UARCH" == "aarch64"]]; then

    ARCH="aarch64"
    K8s_ARCH="arm64"

else

    ARCH="x86_64"
    K8s_ARCH="amd64"

fi

curl -LO https://get.helm.sh/helm-v3.12.2-linux-${K8s_ARCH}.tar.gz

helm repo add https://stefanprodan.github.io/podinfo
helm fetch podinfo/podinfo --version 6.4.0
docker pull ghcr.io/stefanprodan/podinfo:6.4.0

docker save -o podinfo_podinfo-6.4.0.tar ghcr.io/stefanprodan/podinfo


### Transfer the image across the air gap

Reuse the `~/tmp` directory created on the air gapped VM to transport these artifacts across the air gap:

```bash
scp -i <<SSH_KEY>> <<FILE>> <<AIRGAP_VM_USER>>@<<AIRGAP_VM_IP>>:~/tmp/

cd ~/tmp

tar -zxvf helm-v3.0.0-linux-amd64.tar.gz
mv linux-amd64/helm /usr/local/bin/helm

docker load -i podinfo_podinfo-6.4.0.tar
docker tag podinfo/podinfo:6.4.0 localhost:5000/podinfo/podinfo:6.4.0
docker push localhost:5000/podinfo/podinfo:6.4.0

# Outside of a demo or lab environment, use lower (or even least) privilege
# credentials to manage your workloads.
export KUBECONFIG=/etc/kubernetes/admin.conf
helm install podinfo ./podinfo-6.4.0.tgz --set image.repository=localhost:5000/podinfo/podinfo

kubectl get pods -n default

k9s

UARCH=$(uname -m)
# Set the architecture variables if needed
if [["$UARCH" == "arm64" || "$UARCH" == "aarch64"]]; then

    ARCH="aarch64"
    K8s_ARCH="arm64"

else

    ARCH="x86_64"
    K8s_ARCH="amd64"

fi

export ZARF_VERSION=v0.28.3

curl -LO "https://github.com/defenseunicorns/zarf/releases/download/${ZARF_VERSION}/zarf_${ZARF_VERSION}_Linux_${K8s_ARCH}"

curl -LO "https://github.com/defenseunicorns/zarf/releases/download/${ZARF_VERSION}/zarf-init-${K8s_ARCH}-${ZARF_VERSION}.tar.zst"

echo 'kind: ZarfPackageConfig
metadata:
    name: podinfo
    description: "Deploy helm chart for the podinfo application in K8s via zarf"
components:
    - name: podinfo
        required: true
        charts:
            - name: podinfo
              version: 6.4.0
              namespace: podinfo-helm-namespace
              releaseName: podinfo
              url: https://stefanprodan.github.io/podinfo
        images:
        - ghcr.io/stefanprodan/podinfo:6.4.0' > zarf.yaml

zarf package create --confirm

ls zarf-package-*

zarf-package-podinfo-arm64.tar.zst

scp -i <<SSH_KEY>> <<FILE>> <<AIRGAP_VM_USER>>@<<AIRGAP_VM_IP>>:~/tmp/

cd ~/tmp

export KUBECONFIG=/etc/kubernetes/admin.conf

export ZARF_VERSION=$(zarf version)

chmod +x zarf && sudo mv zarf /usr/bin

mv zarf-init-arm64-${ZARF_VERSION}.tar.zst /usr/bin

zarf init --confirm --components=git-server

zarf package deploy

cat <<EOF | tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://pkgs.k8s.io/core:/stable:/v1.28/rpm/
enabled=1
gpgcheck=1
gpgkey=https://pkgs.k8s.io/core:/stable:/v1.28/rpm/repodata/repomd.xml.key
EOF

cat <<EOF | tee /etc/yum.repos.d/cri-o.repo
[cri-o]
name=CRI-O
baseurl=https://pkgs.k8s.io/addons:/cri-o:/prerelease:/main/rpm/
enabled=1
gpgcheck=1
gpgkey=https://pkgs.k8s.io/addons:/cri-o:/prerelease:/main/rpm/repodata/repomd.xml.key
EOF

dnf install -y \
    conntrack \
    container-selinux \
    ebtables \
    ethtool \
    iptables \
    socat

dnf install -y --repo cri-o --repo kubernetes \
    cri-o \
    kubeadm \
    kubectl \
    kubelet

apt-get update
apt-get install -y software-properties-common curl

curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.28/deb/Release.key |
    gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.28/deb/ /" |
    tee /etc/apt/sources.list.d/kubernetes.list

curl -fsSL https://pkgs.k8s.io/addons:/cri-o:/prerelease:/main/deb/Release.key |
    gpg --dearmor -o /etc/apt/keyrings/cri-o-apt-keyring.gpg
echo "deb [signed-by=/etc/apt/keyrings/cri-o-apt-keyring.gpg] https://pkgs.k8s.io/addons:/cri-o:/prerelease:/main/deb/ /" |
    tee /etc/apt/sources.list.d/cri-o.list

apt-get update
apt-get install -y cri-o kubelet kubeadm kubectl

systemctl start crio.service

# kubeadm init --feature-gates=EtcdLearnerMode=true ...
kubeadm init --config=kubeadm-config.yaml

apiVersion: kubeadm.k8s.io/v1beta3
kind: ClusterConfiguration
featureGates:
  EtcdLearnerMode: true

ETCDCTL_API=3 etcdctl --endpoints 127.0.0.1:2379 \
  --cert=/etc/kubernetes/pki/etcd/server.crt \
  --key=/etc/kubernetes/pki/etcd/server.key \
  --cacert=/etc/kubernetes/pki/etcd/ca.crt \
  member list
...
dc543c4d307fadb9, started, node1, https://10.6.177.40:2380, https://10.6.177.40:2379, false

deb [signed-by=/etc/apt/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main

[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
enabled=1
gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
exclude=kubelet kubeadm kubectl

apiVersion: gateway.networking.k8s.io/v1beta1
kind: HTTPRoute
metadata:
  name: bar-route
spec:
  parentRefs:
  - group: ""
    kind: Service
    name: demo-app
    port: 5000
  rules:
  - matches:
    - headers:
      - type: Exact
        name: env
        value: v1
    backendRefs:
    - name: demo-app-v1
      port: 5000
  - backendRefs:
    - name: demo-app-v2
      port: 5000

apiVersion: v1
kind: Pod
spec:
  initContainers:
  - name: secret-fetch
    image: secret-fetch:1.0
  - name: network-proxy
    image: network-proxy:1.0
    restartPolicy: Always
  containers:
  ...

# this fragment goes into the kubelet's configuration file
memorySwap:
  swapBehavior: UnlimitedSwap

dd if=/dev/zero of=/swapfile bs=128M count=32
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile
swapon -s # enable the swap file only until this node is rebooted

---
apiVersion: "kubeadm.k8s.io/v1beta3"
kind: InitConfiguration
---
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
failSwapOn: false
featureGates:
  NodeSwap: true
memorySwap:
  swapBehavior: LimitedSwap

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: podresources-monitoring-app
  namespace: monitoring
spec:
  selector:
    matchLabels:
      name: podresources-monitoring
  template:
    metadata:
      labels:
        name: podresources-monitoring
    spec:
      containers:
      - args:
        - --podresources-socket=unix:///host-podresources/kubelet.sock
        command:
        - /bin/podresources-monitor
        image: podresources-monitor:latest  # just for an example
        volumeMounts:
        - mountPath: /host-podresources
          name: host-podresources
      serviceAccountName: podresources-monitor
      volumes:
      - hostPath:
          path: /var/lib/kubelet/pod-resources
          type: Directory
        name: host-podresources

 /job:worker/task:4: Duplicate task registration with task_name=/job:worker/replica:0/task:4

kind: Job
metadata:
  name: new
  ...
spec:
  podReplacementPolicy: Failed
  ...

kubectl get jobs/myjob -o=jsonpath='{.items[*].status.terminating}'

3 # three Pods are terminating and have not yet reached the Failed phase

apiVersion: batch/v1
kind: Job
metadata:
  name: job-backoff-limit-per-index-execute-all
spec:
  completions: 8
  parallelism: 2
  completionMode: Indexed
  backoffLimitPerIndex: 1
  template:
    spec:
      restartPolicy: Never
      containers:
      - name: example # this example container returns an error, and fails,
                      # when it is run as the second or third index in any Job
                      # (even after a retry)        
        image: python
        command:
        - python3
        - -c
        - |
          import os, sys, time
          id = int(os.environ.get("JOB_COMPLETION_INDEX"))
          if id == 1 or id == 2:
            sys.exit(1)
          time.sleep(1)          

kubectl get pods -l job-name=job-backoff-limit-per-index-execute-all

NAME                                              READY   STATUS      RESTARTS   AGE
job-backoff-limit-per-index-execute-all-0-b26vc   0/1     Completed   0          49s
job-backoff-limit-per-index-execute-all-1-6j5gd   0/1     Error       0          49s
job-backoff-limit-per-index-execute-all-1-6wd82   0/1     Error       0          37s
job-backoff-limit-per-index-execute-all-2-c66hg   0/1     Error       0          32s
job-backoff-limit-per-index-execute-all-2-nf982   0/1     Error       0          43s
job-backoff-limit-per-index-execute-all-3-cxmhf   0/1     Completed   0          33s
job-backoff-limit-per-index-execute-all-4-9q6kq   0/1     Completed   0          28s
job-backoff-limit-per-index-execute-all-5-z9hqf   0/1     Completed   0          28s
job-backoff-limit-per-index-execute-all-6-tbkr8   0/1     Completed   0          23s
job-backoff-limit-per-index-execute-all-7-hxjsq   0/1     Completed   0          22s

kubectl get jobs job-backoff-limit-per-index-fail-index -o yaml

  status:
    completedIndexes: 0,3-7
    failedIndexes: 1,2
    succeeded: 6
    failed: 4
    conditions:
    - message: Job has failed indexes
      reason: FailedIndexes
      status: "True"
      type: Failed

kubectl taint nodes <node-name> node.kubernetes.io/out-of-service=nodeshutdown:NoExecute

echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.28/deb/ /" | sudo tee /etc/apt/sources.list.d/kubernetes.list

curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.28/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg

sudo apt-get update

cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://pkgs.k8s.io/core:/stable:/v1.28/rpm/
enabled=1
gpgcheck=1
gpgkey=https://pkgs.k8s.io/core:/stable:/v1.28/rpm/repodata/repomd.xml.key
exclude=kubelet kubeadm kubectl cri-tools kubernetes-cni
EOF

{
  "default": [{ "type": "reject" }],
  "transports": {
    "docker": {
      "quay.io/crio/signed": [
        {
          "type": "sigstoreSigned",
          "signedIdentity": { "type": "matchRepository" },
          "fulcio": {
            "oidcIssuer": "https://github.com/login/oauth",
            "subjectEmail": "sgrunert@redhat.com",
            "caData": "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"
          },
          "rekorPublicKeyData": "LS0tLS1CRUdJTiBQVUJMSUMgS0VZLS0tLS0KTUZrd0V3WUhLb1pJemowQ0FRWUlLb1pJemowREFRY0RRZ0FFMkcyWSsydGFiZFRWNUJjR2lCSXgwYTlmQUZ3cgprQmJtTFNHdGtzNEwzcVg2eVlZMHp1ZkJuaEM4VXIvaXk1NUdoV1AvOUEvYlkyTGhDMzBNOStSWXR3PT0KLS0tLS1FTkQgUFVCTElDIEtFWS0tLS0tCg=="
        }
      ]
    }
  }
}

> sudo crio --log-level debug --signature-policy ./policy.json

> sudo crictl -D pull quay.io/crio/signed
DEBU[…] get image connection
DEBU[…] PullImageRequest: &PullImageRequest{Image:&ImageSpec{Image:quay.io/crio/signed,Annotations:map[string]string{},},Auth:nil,SandboxConfig:nil,}
DEBU[…] PullImageResponse: &PullImageResponse{ImageRef:quay.io/crio/signed@sha256:18b42e8ea347780f35d979a829affa178593a8e31d90644466396e1187a07f3a,}
Image is up to date for quay.io/crio/signed@sha256:18b42e8ea347780f35d979a829affa178593a8e31d90644466396e1187a07f3a

DEBU[…] IsRunningImageAllowed for image docker:quay.io/crio/signed:latest
DEBU[…]  Using transport "docker" specific policy section quay.io/crio/signed
DEBU[…] Reading /var/lib/containers/sigstore/crio/signed@sha256=18b42e8ea347780f35d979a829affa178593a8e31d90644466396e1187a07f3a/signature-1
DEBU[…] Looking for sigstore attachments in quay.io/crio/signed:sha256-18b42e8ea347780f35d979a829affa178593a8e31d90644466396e1187a07f3a.sig
DEBU[…] GET https://quay.io/v2/crio/signed/manifests/sha256-18b42e8ea347780f35d979a829affa178593a8e31d90644466396e1187a07f3a.sig
DEBU[…] Content-Type from manifest GET is "application/vnd.oci.image.manifest.v1+json"
DEBU[…] Found a sigstore attachment manifest with 1 layers
DEBU[…] Fetching sigstore attachment 1/1: sha256:8276724a208087e73ae5d9d6e8f872f67808c08b0acdfdc73019278807197c45
DEBU[…] Downloading /v2/crio/signed/blobs/sha256:8276724a208087e73ae5d9d6e8f872f67808c08b0acdfdc73019278807197c45
DEBU[…] GET https://quay.io/v2/crio/signed/blobs/sha256:8276724a208087e73ae5d9d6e8f872f67808c08b0acdfdc73019278807197c45
DEBU[…]  Requirement 0: allowed
DEBU[…] Overall: allowed

> jq '.transports.docker."quay.io/crio/signed"[0].fulcio.subjectEmail = "wrong@mail.com"' policy.json > new-policy.json
> mv new-policy.json policy.json

> sudo crictl rmi quay.io/crio/signed

> sudo crictl pull quay.io/crio/signed
FATA[…] pulling image: rpc error: code = Unknown desc = Source image rejected: Required email wrong@mail.com not found (got []string{"sgrunert@redhat.com"})

> sed -i 's;quay.io/crio/signed;quay.io/crio/unsigned;' policy.json

> sudo crictl pull quay.io/crio/unsigned
FATA[…] pulling image: rpc error: code = Unknown desc = SignatureValidationFailed: Source image rejected: A signature was required, but no signature exists

> cosign verify registry.k8s.io/kube-apiserver-amd64:v1.28.0-alpha.3 \
    --certificate-identity krel-trust@k8s-releng-prod.iam.gserviceaccount.com \
    --certificate-oidc-issuer https://accounts.google.com \
    | jq -r '.[0].critical.identity."docker-reference"'
…

registry.k8s.io/kubernetes/kube-apiserver-amd64

> cosign verify registry.k8s.io/kube-apiserver-amd64:v1.28.0-alpha.2 \
    --certificate-identity krel-trust@k8s-releng-prod.iam.gserviceaccount.com \
    --certificate-oidc-issuer https://accounts.google.com \
    | jq -r '.[0].critical.identity."docker-reference"'
…

asia-northeast2-docker.pkg.dev/k8s-artifacts-prod/images/kubernetes/kube-apiserver-amd64

apiVersion: v1
kind: Pod
metadata:
  name: pod
spec:
  containers:
    - name: container
      image: quay.io/crio/unsigned

> kubectl apply -f pod.yaml
pod/pod created

> kubectl get pods
NAME   READY   STATUS                      RESTARTS   AGE
pod    0/1     SignatureValidationFailed   0          4s

> kubectl describe pod pod | tail -n8
  Type     Reason     Age                From               Message
  ----     ------     ----               ----               -------
  Normal   Scheduled  58s                default-scheduler  Successfully assigned default/pod to 127.0.0.1
  Normal   BackOff    22s (x2 over 55s)  kubelet            Back-off pulling image "quay.io/crio/unsigned"
  Warning  Failed     22s (x2 over 55s)  kubelet            Error: ImagePullBackOff
  Normal   Pulling    9s (x3 over 58s)   kubelet            Pulling image "quay.io/crio/unsigned"
  Warning  Failed     6s (x3 over 55s)   kubelet            Failed to pull image "quay.io/crio/unsigned": SignatureValidationFailed: Source image rejected: A signature was required, but no signature exists
  Warning  Failed     6s (x3 over 55s)   kubelet            Error: SignatureValidationFailed

apiVersion: security-profiles-operator.x-k8s.io/v1beta1
kind: SeccompProfile
metadata:
  name: test
spec:
  defaultAction: SCMP_ACT_ERRNO
  baseProfileName: oci://ghcr.io/security-profiles/runc:v1.1.5
  syscalls:
    - action: SCMP_ACT_ALLOW
      names:
        - uname

> kubectl describe seccompprofile test
Name:         test
Namespace:    security-profiles-operator
Labels:       spo.x-k8s.io/profile-id=SeccompProfile-test
Annotations:  syscalls:
                [{"names":["arch_prctl","brk","capget","capset","chdir","clone","close",...
API Version:  security-profiles-operator.x-k8s.io/v1beta1

> export USERNAME=my-user
> export PASSWORD=my-pass
> spoc push -f ./examples/baseprofile-crun.yaml ghcr.io/security-profiles/crun:v1.8.3
16:35:43.899886 Pushing profile ./examples/baseprofile-crun.yaml to: ghcr.io/security-profiles/crun:v1.8.3
16:35:43.899939 Creating file store in: /tmp/push-3618165827
16:35:43.899947 Adding profile to store: ./examples/baseprofile-crun.yaml
16:35:43.900061 Packing files
16:35:43.900282 Verifying reference: ghcr.io/security-profiles/crun:v1.8.3
16:35:43.900310 Using tag: v1.8.3
16:35:43.900313 Creating repository for ghcr.io/security-profiles/crun
16:35:43.900319 Using username and password
16:35:43.900321 Copying profile to repository
16:35:46.976108 Signing container image
Generating ephemeral keys...
Retrieving signed certificate...

        Note that there may be personally identifiable information associated with this signed artifact.
        This may include the email address associated with the account with which you authenticate.
        This information will be used for signing this artifact and will be stored in public transparency logs and cannot be removed later.

By typing 'y', you attest that you grant (or have permission to grant) and agree to have this information stored permanently in transparency logs.
Your browser will now be opened to:
https://oauth2.sigstore.dev/auth/auth?access_type=…
Successfully verified SCT...
tlog entry created with index: 16520520
Pushing signature to: ghcr.io/security-profiles/crun

> spoc pull ghcr.io/security-profiles/runc:v1.1.5
16:32:29.795597 Pulling profile from: ghcr.io/security-profiles/runc:v1.1.5
16:32:29.795610 Verifying signature

Verification for ghcr.io/security-profiles/runc:v1.1.5 --
The following checks were performed on each of these signatures:
  - Existence of the claims in the transparency log was verified offline
  - The code-signing certificate was verified using trusted certificate authority certificates

[{"critical":{"identity":{"docker-reference":"ghcr.io/security-profiles/runc"},…}}]
16:32:33.208695 Creating file store in: /tmp/pull-3199397214
16:32:33.208713 Verifying reference: ghcr.io/security-profiles/runc:v1.1.5
16:32:33.208718 Creating repository for ghcr.io/security-profiles/runc
16:32:33.208742 Using tag: v1.1.5
16:32:33.208743 Copying profile from repository
16:32:34.119652 Reading profile
16:32:34.119677 Trying to unmarshal seccomp profile
16:32:34.120114 Got SeccompProfile: runc-v1.1.5
16:32:34.120119 Saving profile in: /tmp/profile.yaml

package main

import (
	"syscall"
)

func main() {
	utsname := syscall.Utsname{}
	if err := syscall.Uname(&utsname); err != nil {
		panic(err)
	}
}

> go build -o main main.go
> ldd ./main
        not a dynamic executable

> sudo ./spoc record ./main
10:08:25.591945 Loading bpf module
10:08:25.591958 Using system btf file
libbpf: loading object 'recorder.bpf.o' from buffer
…
libbpf: prog 'sys_enter': relo #3: patched insn #22 (ALU/ALU64) imm 16 -> 16
10:08:25.610767 Getting bpf program sys_enter
10:08:25.610778 Attaching bpf tracepoint
10:08:25.611574 Getting syscalls map
10:08:25.611582 Getting pid_mntns map
10:08:25.613097 Module successfully loaded
10:08:25.613311 Processing events
10:08:25.613693 Running command with PID: 336007
10:08:25.613835 Received event: pid: 336007, mntns: 4026531841
10:08:25.613951 No container ID found for PID (pid=336007, mntns=4026531841, err=unable to find container ID in cgroup path)
10:08:25.614856 Processing recorded data
10:08:25.614975 Found process mntns 4026531841 in bpf map
10:08:25.615110 Got syscalls: read, close, mmap, rt_sigaction, rt_sigprocmask, madvise, nanosleep, clone, uname, sigaltstack, arch_prctl, gettid, futex, sched_getaffinity, exit_group, openat
10:08:25.615195 Adding base syscalls: access, brk, capget, capset, chdir, chmod, chown, close_range, dup2, dup3, epoll_create1, epoll_ctl, epoll_pwait, execve, faccessat2, fchdir, fchmodat, fchown, fchownat, fcntl, fstat, fstatfs, getdents64, getegid, geteuid, getgid, getpid, getppid, getuid, ioctl, keyctl, lseek, mkdirat, mknodat, mount, mprotect, munmap, newfstatat, openat2, pipe2, pivot_root, prctl, pread64, pselect6, readlink, readlinkat, rt_sigreturn, sched_yield, seccomp, set_robust_list, set_tid_address, setgid, setgroups, sethostname, setns, setresgid, setresuid, setsid, setuid, statfs, statx, symlinkat, tgkill, umask, umount2, unlinkat, unshare, write
10:08:25.616293 Wrote seccomp profile to: /tmp/profile.yaml
10:08:25.616298 Unloading bpf module

> cat /tmp/profile.yaml

apiVersion: security-profiles-operator.x-k8s.io/v1beta1
kind: SeccompProfile
metadata:
  creationTimestamp: null
  name: main
spec:
  architectures:
    - SCMP_ARCH_X86_64
  defaultAction: SCMP_ACT_ERRNO
  syscalls:
    - action: SCMP_ACT_ALLOW
      names:
        - access
        - arch_prctl
        - brk
        - …
        - uname
        - …
status: {}

> sudo ./spoc record --type raw-seccomp ./main
…
52.628827 Wrote seccomp profile to: /tmp/profile.json

> jq . /tmp/profile.json

{
  "defaultAction": "SCMP_ACT_ERRNO",
  "architectures": ["SCMP_ARCH_X86_64"],
  "syscalls": [
    {
      "names": ["access", "…", "write"],
      "action": "SCMP_ACT_ALLOW"
    }
  ]
}

> sudo ./spoc run ./main
10:29:58.153263 Reading file /tmp/profile.yaml
10:29:58.153311 Assuming YAML profile
10:29:58.154138 Setting up seccomp
10:29:58.154178 Load seccomp profile
10:29:58.154189 Starting audit log enricher
10:29:58.154224 Enricher reading from file /var/log/audit/audit.log
10:29:58.155356 Running command with PID: 437880
>

> jq 'del(.syscalls[0].names[] | select(. == "uname"))' /tmp/profile.json > /tmp/no-uname-profile.json

> sudo ./spoc run -p /tmp/no-uname-profile.json ./main
10:39:12.707798 Reading file /tmp/no-uname-profile.json
10:39:12.707892 Setting up seccomp
10:39:12.707920 Load seccomp profile
10:39:12.707982 Starting audit log enricher
10:39:12.707998 Enricher reading from file /var/log/audit/audit.log
10:39:12.709164 Running command with PID: 480512
panic: operation not permitted

goroutine 1 [running]:
main.main()
        /path/to/main.go:10 +0x85
10:39:12.713035 Unable to run: launch runner: wait for command: exit status 2

> jq '.defaultAction = "SCMP_ACT_LOG"' /tmp/no-uname-profile.json > /tmp/no-uname-profile-log.json

> sudo ./spoc run -p /tmp/no-uname-profile-log.json ./main
10:48:07.470126 Reading file /tmp/no-uname-profile-log.json
10:48:07.470234 Setting up seccomp
10:48:07.470245 Load seccomp profile
10:48:07.470302 Starting audit log enricher
10:48:07.470339 Enricher reading from file /var/log/audit/audit.log
10:48:07.470889 Running command with PID: 522268
10:48:07.472007 Seccomp: uname (63)

root@vbuild:~/go/src/k8s.io/kubernetes# FEATURE_GATES=InPlacePodVerticalScaling=true ./hack/local-up-cluster.sh
go version go1.20.2 linux/arm64
+++ [0320 13:52:02] Building go targets for linux/arm64
    k8s.io/kubernetes/cmd/kubectl (static)
    k8s.io/kubernetes/cmd/kube-apiserver (static)
    k8s.io/kubernetes/cmd/kube-controller-manager (static)
    k8s.io/kubernetes/cmd/cloud-controller-manager (non-static)
    k8s.io/kubernetes/cmd/kubelet (non-static)
...
...
Logs:
  /tmp/etcd.log
  /tmp/kube-apiserver.log
  /tmp/kube-controller-manager.log

  /tmp/kube-proxy.log
  /tmp/kube-scheduler.log
  /tmp/kubelet.log

To start using your cluster, you can open up another terminal/tab and run:

  export KUBECONFIG=/var/run/kubernetes/admin.kubeconfig
  cluster/kubectl.sh

Alternatively, you can write to the default kubeconfig:

  export KUBERNETES_PROVIDER=local

  cluster/kubectl.sh config set-cluster local --server=https://localhost:6443 --certificate-authority=/var/run/kubernetes/server-ca.crt
  cluster/kubectl.sh config set-credentials myself --client-key=/var/run/kubernetes/client-admin.key --client-certificate=/var/run/kubernetes/client-admin.crt
  cluster/kubectl.sh config set-context local --cluster=local --user=myself
  cluster/kubectl.sh config use-context local
  cluster/kubectl.sh

apiVersion: v1
kind: Service
metadata:
  name: minio
spec:
  ports:
  - name: api
    nodePort: 30009
    port: 9000
    protocol: TCP
    targetPort: 9000
  selector:
    app: minio
  type: NodePort

KUBECTL_APPLYSET=true kubectl apply -f <directory/> --prune --applyset=<name>

NAME        STATUS    VOLUME                                     CAPACITY   ACCESSMODES   AGE
pvc-0       Bound     pvc-a42d7ea2-e3df-11ed-b5ea-0242ac120002   1Gi        RWO           48s
pvc-1       Bound     pvc-a42d81b8-e3df-11ed-b5ea-0242ac120002   1Gi        RWO           48s

% kubectl label pvc pvc-0 group=myGroup
persistentvolumeclaim/pvc-0 labeled

% kubectl label pvc pvc-1 group=myGroup
persistentvolumeclaim/pvc-1 labeled

apiVersion: groupsnapshot.storage.k8s.io/v1alpha1
kind: VolumeGroupSnapshot
metadata:
  name: new-group-snapshot-demo
  namespace: demo-namespace
spec:
  volumeGroupSnapshotClassName: csi-groupSnapclass
  source:
    selector:
      matchLabels:
        group: myGroup

snapshot-62abb5db7204ac6e4c1198629fec533f2a5d9d60ea1a25f594de0bf8866c7947-2023-04-26-2.20.4
snapshot-2026811eb9f0787466171fe189c805a22cdb61a326235cd067dc3a1ac0104900-2023-04-26-2.20.4

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc0-restore
  namespace: demo-namespace
spec:
  storageClassName: csi-hostpath-sc
  dataSource:
    name: snapshot-62abb5db7204ac6e4c1198629fec533f2a5d9d60ea1a25f594de0bf8866c7947-2023-04-26-2.20.4
    kind: VolumeSnapshot
    apiGroup: snapshot.storage.k8s.io
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

apiVersion: v1
kind: Pod
metadata:
  name: example
spec:
  containers:
  - name: nginx
    resources:
      requests:
        memory: "64Mi"
        cpu: "250m"
      limits:
        memory: "64Mi"
        cpu: "500m"

memory.min =  pod.spec.containers[i].resources.requests[memory]

memory.min = \sum_{i=0}^{no. of pods}pod.spec.containers[i].resources.requests[memory]

memory.min = \sum_{i}^{no. of nodes}\sum_{j}^{no. of pods}pod[i].spec.containers[j].resources.requests[memory]

apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
featureGates:
  MemoryQoS: true

type: ContainerResource
containerResource:
  name: cpu
  container: application
  target:
    type: Utilization
    averageUtilization: 60

type: Resource
resource:
  name: cpu
  target:
    type: Utilization
    averageUtilization: 60

sum{the resource usage of each container} / sum{the resource request of each container}

kubectl create ns kep-3335

helm repo add bitnami https://charts.bitnami.com/bitnami
helm install redis --namespace kep-3335 \
  bitnami/redis-cluster \
  --set persistence.size=1Gi \
  --set cluster.nodes=6

kubectl exec -it redis-redis-cluster-0 -- /bin/bash -c \
  "redis-cli -c -h redis-redis-cluster -a $(kubectl get secret redis-redis-cluster -o jsonpath="{.data.redis-password}" | base64 -d) CLUSTER NODES;"

2ce30362c188aabc06f3eee5d92892d95b1da5c3 10.104.0.14:6379@16379 myself,master - 0 1669764411000 3 connected 10923-16383                                                                                                                                              
7743661f60b6b17b5c71d083260419588b4f2451 10.104.0.16:6379@16379 slave 2ce30362c188aabc06f3eee5d92892d95b1da5c3 0 1669764410000 3 connected                                                                                             
961f35e37c4eea507cfe12f96e3bfd694b9c21d4 10.104.0.18:6379@16379 slave a8765caed08f3e185cef22bd09edf409dc2bcc61 0 1669764411000 1 connected                                                                                                             
7136e37d8864db983f334b85d2b094be47c830e5 10.104.0.15:6379@16379 slave 2cff613d763b22c180cd40668da8e452edef3fc8 0 1669764412595 2 connected                                                                                                                    
a8765caed08f3e185cef22bd09edf409dc2bcc61 10.104.0.19:6379@16379 master - 0 1669764411592 1 connected 0-5460                                                                                                                                                   
2cff613d763b22c180cd40668da8e452edef3fc8 10.104.0.17:6379@16379 master - 0 1669764410000 2 connected 5461-10922

helm install redis --namespace kep-3335 \
  bitnami/redis-cluster \
  --set persistence.size=1Gi \
  --set cluster.nodes=0 \
  --set redis.extraEnvVars\[0\].name=REDIS_NODES,redis.extraEnvVars\[0\].value="redis-redis-cluster-headless.kep-3335.svc.cluster.local" \
  --set existingSecret=redis-redis-cluster

kubectl patch sts redis-redis-cluster -p '{"spec": {"replicas": 5}}'

kubectl get pvc redis-data-redis-redis-cluster-5 -o yaml | yq 'del(.metadata.uid, .metadata.resourceVersion, .metadata.annotations, .metadata.finalizers, .status)' > /tmp/pvc-redis-data-redis-redis-cluster-5.yaml
kubectl get pv $(yq '.spec.volumeName' /tmp/pvc-redis-data-redis-redis-cluster-5.yaml) -o yaml | yq 'del(.metadata.uid, .metadata.resourceVersion, .metadata.annotations, .metadata.finalizers, .spec.claimRef, .status)' > /tmp/pv-redis-data-redis-redis-cluster-5.yaml
kubectl get secret redis-redis-cluster -o yaml | yq 'del(.metadata.uid, .metadata.resourceVersion)' > /tmp/secret-redis-redis-cluster.yaml

kubectl create -f /tmp/pv-redis-data-redis-redis-cluster-5.yaml
kubectl create -f /tmp/pvc-redis-data-redis-redis-cluster-5.yaml
kubectl create -f /tmp/secret-redis-redis-cluster.yaml

kubectl patch sts redis-redis-cluster -p '{"spec": {"ordinals": {"start": 5}, "replicas": 1}}'

kubectl exec -it redis-redis-cluster-5 -- /bin/bash -c \
  "redis-cli -c -h redis-redis-cluster -a $(kubectl get secret redis-redis-cluster -o jsonpath="{.data.redis-password}" | base64 -d) CLUSTER NODES;"

2cff613d763b22c180cd40668da8e452edef3fc8 10.104.0.17:6379@16379 master - 0 1669766684000 2 connected 5461-10922
7136e37d8864db983f334b85d2b094be47c830e5 10.108.0.22:6379@16379 myself,slave 2cff613d763b22c180cd40668da8e452edef3fc8 0 1669766685609 2 connected
2ce30362c188aabc06f3eee5d92892d95b1da5c3 10.104.0.14:6379@16379 master - 0 1669766684000 3 connected 10923-16383
961f35e37c4eea507cfe12f96e3bfd694b9c21d4 10.104.0.18:6379@16379 slave a8765caed08f3e185cef22bd09edf409dc2bcc61 0 1669766683600 1 connected
a8765caed08f3e185cef22bd09edf409dc2bcc61 10.104.0.19:6379@16379 master - 0 1669766685000 1 connected 0-5460
7743661f60b6b17b5c71d083260419588b4f2451 10.104.0.16:6379@16379 slave 2ce30362c188aabc06f3eee5d92892d95b1da5c3 0 1669766686613 3 connected

# Fetch kubelet logs from a node named node-1.example
kubectl get --raw "/api/v1/nodes/node-1.example/proxy/logs/?query=kubelet"

# Fetch kubelet logs from a node named node-1.example that have the word "error"
kubectl get --raw "/api/v1/nodes/node-1.example/proxy/logs/?query=kubelet&pattern=error"

kubectl get --raw "/api/v1/nodes/<insert-node-name-here>/proxy/logs/?query=/<insert-log-file-name-here>"

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: single-writer-only
spec:
  accessModes:
  - ReadWriteOncePod # Allow only a single pod to access single-writer-only.
  resources:
    requests:
      storage: 1Gi

...
topologySpreadConstraints:
- maxSkew: 1
  minDomains: 5 # requires 5 Nodes at least (because each Node has a unique hostname).
  whenUnsatisfiable: DoNotSchedule # minDomains is valid only when DoNotSchedule is used.
  topologyKey: kubernetes.io/hostname
  labelSelector:
    matchLabels:
        foo: bar

apiVersion: v1
kind: Pod
metadata:
  name: example-pod
spec:
  # Configure a topology spread constraint
  topologySpreadConstraints:
    - maxSkew: <integer>
      # ...
      nodeAffinityPolicy: [Honor|Ignore]
      nodeTaintsPolicy: [Honor|Ignore]
  # other Pod fields go here

topologySpreadConstraints:
    - maxSkew: 1
      topologyKey: kubernetes.io/hostname
      whenUnsatisfiable: DoNotSchedule
      labelSelector:
        matchLabels:
          app: foo
      matchLabelKeys:
        - pod-template-hash

apiVersion: admissionregistration.k8s.io/v1alpha1
kind: ValidatingAdmissionPolicy
metadata:
  name: "kubescape-c-0017-deny-resources-with-mutable-container-filesystem"
spec:
  failurePolicy: Fail
  matchConstraints:
    resourceRules:
    - apiGroups:   [""]
      apiVersions: ["v1"]
      operations:  ["CREATE", "UPDATE"]
      resources:   ["pods"]
    - apiGroups:   ["apps"]
      apiVersions: ["v1"]
      operations:  ["CREATE", "UPDATE"]
      resources:   ["deployments","replicasets","daemonsets","statefulsets"]
    - apiGroups:   ["batch"]
      apiVersions: ["v1"]
      operations:  ["CREATE", "UPDATE"]
      resources:   ["jobs","cronjobs"]
  validations:
    - expression: "object.kind != 'Pod' || object.spec.containers.all(container, has(container.securityContext) && has(container.securityContext.readOnlyRootFilesystem) &&  container.securityContext.readOnlyRootFilesystem == true)"
      message: "Pods having containers with mutable filesystem not allowed! (see more at https://hub.armosec.io/docs/c-0017)"
    - expression: "['Deployment','ReplicaSet','DaemonSet','StatefulSet','Job'].all(kind, object.kind != kind) || object.spec.template.spec.containers.all(container, has(container.securityContext) && has(container.securityContext.readOnlyRootFilesystem) &&  container.securityContext.readOnlyRootFilesystem == true)"
      message: "Workloads having containers with mutable filesystem not allowed! (see more at https://hub.armosec.io/docs/c-0017)"
    - expression: "object.kind != 'CronJob' || object.spec.jobTemplate.spec.template.spec.containers.all(container, has(container.securityContext) && has(container.securityContext.readOnlyRootFilesystem) &&  container.securityContext.readOnlyRootFilesystem == true)"
      message: "CronJob having containers with mutable filesystem not allowed! (see more at https://hub.armosec.io/docs/c-0017)"

minikube start --kubernetes-version=1.26.1 --extra-config=apiserver.runtime-config=admissionregistration.k8s.io/v1alpha1  --feature-gates='ValidatingAdmissionPolicy=true'

# Install configuration CRD
kubectl apply -f https://github.com/kubescape/cel-admission-library/releases/latest/download/policy-configuration-definition.yaml
# Install basic configuration
kubectl apply -f https://github.com/kubescape/cel-admission-library/releases/latest/download/basic-control-configuration.yaml
# Install policies
kubectl apply -f https://github.com/kubescape/cel-admission-library/releases/latest/download/kubescape-validating-admission-policies.yaml

# Create a binding
kubectl apply -f - <<EOT
apiVersion: admissionregistration.k8s.io/v1alpha1
kind: ValidatingAdmissionPolicyBinding
metadata:
  name: c0017-binding
spec:
  policyName: kubescape-c-0017-deny-mutable-container-filesystem
  matchResources:
    namespaceSelector:
      matchLabels:
        policy: enforced
EOT

# Create a namespace for running the example
kubectl create namespace policy-example
kubectl label namespace policy-example 'policy=enforced'

# The next line should fail
kubectl -n policy-example run nginx --image=nginx --restart=Never

The pods "nginx" is invalid: : ValidatingAdmissionPolicy 'kubescape-c-0017-deny-mutable-container-filesystem' with binding 'c0017-binding' denied request: Pods having containers with mutable filesystem not allowed! (see more at https://hub.armosec.io/docs/c-0017)

apiVersion: admissionregistration.k8s.io/v1alpha1
kind: ValidatingAdmissionPolicyBinding
metadata:
  name: c0001-binding
spec:
  policyName: kubescape-c-0001-deny-forbidden-container-registries
  paramRef:
    name: basic-control-configuration
  matchResources:
    namespaceSelector:
      matchLabels:
        policy: enforced

kubectl run hello-world -ti --rm --image=registry.k8s.io/busybox:latest --restart=Never -- date

$ kubectl run hello-world -ti --rm --image=registry.k8s.io/busybox:latest --restart=Never -- date
Fri Feb 31 07:07:07 UTC 2023
pod "hello-world" deleted

FailedCreatePodSandBox: Failed to create pod sandbox: rpc error: code = Unknown desc = Error response from daemon: Head “https://us-west1-docker.pkg.dev/v2/k8s-artifacts-prod/images/pause/manifests/3.8”: x509: certificate signed by unknown authority

kubectl get pods --all-namespaces -o jsonpath="{.items[*].spec.containers[*].image}" |\
tr -s '[[:space:]]' '\n' |\
sort |\
uniq -c

kubectl krew install community-images

kubectl community-images

apiVersion: v1
kind: Pod
metadata:
  name: counters
spec:
  containers:
  - name: counter
    image: quay.io/adrianreber/counter:blog

$ kubectl get pod counters --template '{{.status.podIP}}'
10.88.0.25
$ curl 10.88.0.25:8088/create?test-file
$ curl 10.88.0.25:8088/secret?RANDOM_1432_KEY
$ curl 10.88.0.25:8088

# run this on the node where that Pod is executing
curl -X POST "https://localhost:10250/checkpoint/default/counters/counter"

--insecure --cert /var/run/kubernetes/client-admin.crt --key /var/run/kubernetes/client-admin.key

$ checkpointctl show checkpoint.tar --print-stats
+-----------+----------------------------------+--------------+---------+---------------------+--------+------------+------------+-------------------+
| CONTAINER |              IMAGE               |      ID      | RUNTIME |       CREATED       | ENGINE |     IP     | CHKPT SIZE | ROOT FS DIFF SIZE |
+-----------+----------------------------------+--------------+---------+---------------------+--------+------------+------------+-------------------+
| counter   | quay.io/adrianreber/counter:blog | 059a219a22e5 | runc    | 2023-03-02T06:06:49 | CRI-O  | 10.88.0.23 | 8.6 MiB    | 3.0 KiB           |
+-----------+----------------------------------+--------------+---------+---------------------+--------+------------+------------+-------------------+
CRIU dump statistics
+---------------+-------------+--------------+---------------+---------------+---------------+
| FREEZING TIME | FROZEN TIME | MEMDUMP TIME | MEMWRITE TIME | PAGES SCANNED | PAGES WRITTEN |
+---------------+-------------+--------------+---------------+---------------+---------------+
| 100809 us     | 119627 us   | 11602 us     | 7379 us       |          7800 |          2198 |
+---------------+-------------+--------------+---------------+---------------+---------------+

$ tar xvf rootfs-diff.tar
home/counter/logfile
home/counter/test-file

$ cat home/counter/logfile
10.88.0.1 - - [02/Mar/2023 06:07:29] "GET /create?test-file HTTP/1.1" 200 -
10.88.0.1 - - [02/Mar/2023 06:07:40] "GET /secret?RANDOM_1432_KEY HTTP/1.1" 200 -
10.88.0.1 - - [02/Mar/2023 06:07:43] "GET / HTTP/1.1" 200 -
$ cat home/counter/test-file
test-file 

$ crit show checkpoint/pstree.img | jq .entries[].pid
1
7
8

$ crit show checkpoint/core-1.img | jq .entries[0].tc.comm
"bash"
$ crit show checkpoint/core-7.img | jq .entries[0].tc.comm
"counter.py"
$ crit show checkpoint/core-8.img | jq .entries[0].tc.comm
"tee"

$ crictl inspect --output go-template --template "{{(index .info.pid)}}" 059a219a22e56
722520
$ ps auxf | grep -A 2 722520
fedora    722520  \_ bash -c /home/counter/counter.py 2>&1 | tee /home/counter/logfile
fedora    722541      \_ /usr/bin/python3 /home/counter/counter.py
fedora    722542      \_ /usr/bin/coreutils --coreutils-prog-shebang=tee /usr/bin/tee /home/counter/logfile
$ cat /proc/722520/comm
bash
$ cat /proc/722541/comm
counter.py
$ cat /proc/722542/comm
tee

$ crit show checkpoint/utsns-12.img
{
    "magic": "UTSNS",
    "entries": [
        {
            "nodename": "counters",
            "domainname": "(none)"
        }
    ]
}

$ ls  checkpoint/pages-*
checkpoint/pages-1.img  checkpoint/pages-2.img  checkpoint/pages-3.img

$ grep -ao RANDOM_1432_KEY checkpoint/pages-*
checkpoint/pages-2.img:RANDOM_1432_KEY

$ /home/criu/coredump/coredump-python3
$ ls -al core*
core.1  core.7  core.8

$ echo info registers | gdb --core checkpoint/core.1 -q

[New LWP 1]

Core was generated by `bash -c /home/counter/counter.py 2>&1 | tee /home/counter/logfile'.

#0  0x00007fefba110198 in ?? ()
(gdb)
rax            0x3d                61
rbx            0x8                 8
rcx            0x7fefba11019a      140667595587994
rdx            0x0                 0
rsi            0x7fffed9c1110      140737179816208
rdi            0xffffffff          4294967295
rbp            0x1                 0x1
rsp            0x7fffed9c10e8      0x7fffed9c10e8
r8             0x1                 1
r9             0x0                 0
r10            0x0                 0
r11            0x246               582
r12            0x0                 0
r13            0x7fffed9c1170      140737179816304
r14            0x0                 0
r15            0x0                 0
rip            0x7fefba110198      0x7fefba110198
eflags         0x246               [ PF ZF IF ]
cs             0x33                51
ss             0x2b                43
ds             0x0                 0
es             0x0                 0
fs             0x0                 0
gs             0x0                 0

kubectl get pods --all-namespaces -o jsonpath="{.items[*].spec.containers[*].image}" |\
tr -s '[[:space:]]' '\n' |\
sort |\
uniq -c

$ kubectl get priorityclass
NAME                      VALUE        GLOBAL-DEFAULT   AGE
system-cluster-critical   2000000000   false            82m
system-node-critical      2000001000   false            82m

---
# development
apiVersion: v1
kind: Pod
metadata:
  name: dev-nginx
  labels:
    env: dev
spec:
  containers:
  - name: dev-nginx
    image: nginx
    resources:
      requests:
        memory: "256Mi"
        cpu: "0.2"
      limits:
        memory: ".5Gi"
        cpu: "0.5"

---
# preproduction
apiVersion: v1
kind: Pod
metadata:
  name: preprod-nginx
  labels:
    env: preprod
spec:
  containers:
  - name: preprod-nginx
    image: nginx
    resources:
      requests:
        memory: "1.5Gi"
        cpu: "1.5"
      limits:
        memory: "2Gi"
        cpu: "2"

---
# production
apiVersion: v1
kind: Pod
metadata:
  name: prod-nginx
  labels:
    env: prod
spec:
  containers:
  - name: prod-nginx
    image: nginx
    resources:
      requests:
        memory: "2Gi"
        cpu: "2"
      limits:
        memory: "2Gi"
        cpu: "2"

$ kubectl get pods --show-labels
NAME            READY   STATUS    RESTARTS   AGE   LABELS
dev-nginx       1/1     Running   0          55s   env=dev
preprod-nginx   1/1     Running   0          55s   env=preprod
prod-nginx      0/1     Pending   0          55s   env=prod

$ kubectl get events
...
...
5s          Warning   FailedScheduling   pod/prod-nginx      0/2 nodes are available: 1 Insufficient cpu, 2 Insufficient memory.

apiVersion: scheduling.k8s.io/v1
kind: PriorityClass
metadata:
  name: PRIORITYCLASS_NAME
value: 0 # any integer value between -1000000000 to 1000000000 
description: >-
  (Optional) description goes here!  
globalDefault: false # or true. Only one PriorityClass can be the global default.

apiVersion: scheduling.k8s.io/v1
kind: PriorityClass
metadata:
  name: dev-pc
value: 1000000
globalDefault: false
description: >-
  (Optional) This priority class should only be used for all development pods.  

apiVersion: scheduling.k8s.io/v1
kind: PriorityClass
metadata:
  name: preprod-pc
value: 2000000
globalDefault: false
description: >-
  (Optional) This priority class should only be used for all preprod pods.  

apiVersion: scheduling.k8s.io/v1
kind: PriorityClass
metadata:
  name: prod-pc
value: 4000000
globalDefault: false
description: >-
  (Optional) This priority class should only be used for all prod pods.  

$ kubectl get pc
NAME                      VALUE        GLOBAL-DEFAULT   AGE
dev-pc                    1000000      false            3m13s
preprod-pc                2000000      false            2m3s
prod-pc                   4000000      false            7s
system-cluster-critical   2000000000   false            82m
system-node-critical      2000001000   false            82m

$ kubectl get pods --show-labels
NAME            READY   STATUS    	RESTARTS   AGE   LABELS
dev-nginx       1/1     Terminating	0          55s   env=dev
preprod-nginx   1/1     Running   	0          55s   env=preprod
prod-nginx      0/1     Pending   	0          55s   env=prod

Warning   FailedScheduling   pod/prod-nginx    0/2 nodes are available: 1 Insufficient cpu, 2 Insufficient memory.
Normal    Preempted          pod/dev-nginx     by default/prod-nginx on node node01
Normal    Killing            pod/dev-nginx     Stopping container dev-nginx
Normal    Scheduled          pod/prod-nginx    Successfully assigned default/prod-nginx to node01
Normal    Pulling            pod/prod-nginx    Pulling image "nginx"
Normal    Pulled             pod/prod-nginx    Successfully pulled image "nginx"
Normal    Created            pod/prod-nginx    Created container prod-nginx
Normal    Started            pod/prod-nginx    Started container prod-nginx

apiVersion: policy/v1
kind: PodDisruptionBudget
metadata:
  name: nginx-pdb
spec:
  selector:
    matchLabels:
      app: nginx
  maxUnavailable: 1
  unhealthyPodEvictionPolicy: AlwaysAllow

storageClassName
storageClassName
storageClassName
storageClassName
storageClassName
storageClassName
--feature-gates="...,RetroactiveDefaultStorageClass=true"

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc-1
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

kubectl get pvc

NAME      STATUS    VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
pvc-1     Pending   

kubectl patch sc -p '{"metadata":{"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'

storageclass.storage.k8s.io/my-storageclass patched

kubectl get pvc

NAME      STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS      AGE
pvc-1     Bound    pvc-06a964ca-f997-4780-8627-b5c3bf5a87d8   1Gi        RWO            my-storageclass   87m

  - apiGroups: ["gateway.networking.k8s.io"]
    resources: ["referencegrants"]
    verbs: ["get", "list", "watch"]

      - args:
        - -v=5
        - --csi-address=/csi/csi.sock
        - --feature-gates=Topology=true
        - --feature-gates=CrossNamespaceVolumeDataSource=true
        image: csi-provisioner:latest
        imagePullPolicy: IfNotPresent
        name: csi-provisioner

apiVersion: gateway.networking.k8s.io/v1beta1
kind: ReferenceGrant
metadata:
  name: allow-prod-pvc
  namespace: prod
spec:
  from:
  - group: ""
    kind: PersistentVolumeClaim
    namespace: dev
  to:
  - group: snapshot.storage.k8s.io
    kind: VolumeSnapshot
    name: new-snapshot-demo

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: example-pvc
  namespace: dev
spec:
  storageClassName: example
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  dataSourceRef:
    apiGroup: snapshot.storage.k8s.io
    kind: VolumeSnapshot
    name: new-snapshot-demo
    namespace: prod
  volumeMode: Filesystem

apiVersion: v1
kind: Service
metadata:
  name: my-service
spec:
  selector:
    app.kubernetes.io/name: my-app
  ports:
    - protocol: TCP
      port: 80
      targetPort: 9376
  type: LoadBalancer

NAME       READY   STATUS            RESTARTS   AGE
test-pod   0/1     SchedulingGated   0          10s

{
  "apiVersion": "kubelet.k8s.io/v1",
  "kind": "CredentialProviderResponse",
  "auth": {
    "cacheDuration": "6h",
    "private-registry.io/my-app": {
      "username": "exampleuser",
      "password": "token12345"
    }
  }
}

{
  "apiVersion": "kubelet.k8s.io/v1",
  "kind": "CredentialProviderResponse",
  "auth": {
    "cacheKeyType": "Registry",
    "private-registry.io/my-app": {
      "username": "exampleuser",
      "password": "token12345"
    }
  }
}

kind: CredentialProviderConfig
apiVersion: kubelet.config.k8s.io/v1
providers:
- name: auth-provider-gcp
  apiVersion: credentialprovider.kubelet.k8s.io/v1
  matchImages:
  - "container.cloud.google.com"
  - "gcr.io"
  - "*.gcr.io"
  - "*.pkg.dev"
  args:
  - get-credentials
  - --v=3
  defaultCacheDuration: 1m

apiVersion: admissionregistration.k8s.io/v1alpha1
kind: ValidatingAdmissionPolicy
metadata:
  name: "demo-policy.example.com"
spec:
  matchConstraints:
    resourceRules:
    - apiGroups:   ["apps"]
      apiVersions: ["v1"]
      operations:  ["CREATE", "UPDATE"]
      resources:   ["deployments"]
  validations:
    - expression: "object.spec.replicas <= 5"

apiVersion: admissionregistration.k8s.io/v1alpha1
kind: ValidatingAdmissionPolicyBinding
metadata:
  name: "demo-binding-test.example.com"
spec:
  policyName: "demo-policy.example.com"
  matchResources:
    namespaceSelector:
      matchExpressions:
      - key: environment
        operator: In
        values:
        - test

apiVersion: admissionregistration.k8s.io/v1alpha1
kind: ValidatingAdmissionPolicy
metadata:
  name: "demo-policy.example.com"
spec:
  paramKind:
    apiVersion: rules.example.com/v1 # You also need a CustomResourceDefinition for this API
    kind: ReplicaLimit
  matchConstraints:
    resourceRules:
    - apiGroups:   ["apps"]
      apiVersions: ["v1"]
      operations:  ["CREATE", "UPDATE"]
      resources:   ["deployments"]
  validations:
    - expression: "object.spec.replicas <= params.maxReplicas"

apiVersion: admissionregistration.k8s.io/v1alpha1
kind: ValidatingAdmissionPolicyBinding
metadata:
  name: "demo-binding-production.example.com"
spec:
  policyName: "demo-policy.example.com"
  paramRef:
    name: "demo-params-production.example.com"
  matchResources:
    namespaceSelector:
      matchExpressions:
      - key: environment
        operator: In
        values:
        - production

apiVersion: rules.example.com/v1 # defined via a CustomResourceDefinition
kind: ReplicaLimit
metadata:
  name: "demo-params-production.example.com"
maxReplicas: 1000

kubectl taint nodes <node-name> node.kubernetes.io/out-of-service=nodeshutdown:NoExecute

apiVersion: resource.k8s.io/v1alpha1
kind: ResourceClass
name: resource.example.com
driverName: resource-driver.example.com

---
apiVersion: cats.resource.example.com/v1
kind: ClaimParameters
name: large-black-cats
spec:
  color: black
  size: large
---
apiVersion: resource.k8s.io/v1alpha1
kind: ResourceClaimTemplate
metadata:
  name: large-black-cats
spec:
  spec:
    resourceClassName: resource.example.com
    parametersRef:
      apiGroup: cats.resource.example.com
      kind: ClaimParameters
      name: large-black-cats
–--
apiVersion: v1
kind: Pod
metadata:
  name: pod-with-cats
spec:
  containers: # two example containers; each container claims one cat resource
  - name: first-example
    image: ubuntu:22.04
    command: ["sleep", "9999"]
    resources:
      claims:
      - name: cat-0
  - name: second-example
    image: ubuntu:22.04
    command: ["sleep", "9999"]
    resources:
      claims:
      - name: cat-1
  resourceClaims:
  - name: cat-0
    source:
      resourceClaimTemplateName: large-black-cats
  - name: cat-1
    source:
      resourceClaimTemplateName: large-black-cats

$ hack/install-etcd.sh
...

$ RUNTIME_CONFIG=resource.k8s.io/v1alpha1 \
  FEATURE_GATES=DynamicResourceAllocation=true \
  DNS_ADDON="coredns" \
  CGROUP_DRIVER=systemd \
  CONTAINER_RUNTIME_ENDPOINT=unix:///var/run/crio/crio.sock \
  LOG_LEVEL=6 \
  ENABLE_CSI_SNAPSHOTTER=false \
  API_SECURE_PORT=6444 \
  ALLOW_PRIVILEGED=1 \
  PATH=$(pwd)/third_party/etcd:$PATH \
  ./hack/local-up-cluster.sh -O
...

$ export KUBECONFIG=/var/run/kubernetes/admin.kubeconfig

$ go run ./test/e2e/dra/test-driver --feature-gates ContextualLogging=true -v=5 controller

$ sudo mkdir -p /var/run/cdi && \
  sudo chmod a+rwx /var/run/cdi /var/lib/kubelet/plugins_registry /var/lib/kubelet/plugins/
$ go run ./test/e2e/dra/test-driver --feature-gates ContextualLogging=true -v=6 kubelet-plugin

$ kubectl create -f test/e2e/dra/test-driver/deploy/example/resourceclass.yaml
resourceclass.resource.k8s.io/example created

$ kubectl create -f test/e2e/dra/test-driver/deploy/example/pod-inline.yaml
configmap/test-inline-claim-parameters created
resourceclaimtemplate.resource.k8s.io/test-inline-claim-template created
pod/test-inline-claim created

$ kubectl get resourceclaims
NAME                         RESOURCECLASSNAME   ALLOCATIONMODE         STATE                AGE
test-inline-claim-resource   example             WaitForFirstConsumer   allocated,reserved   8s

$ kubectl get pods
NAME                READY   STATUS      RESTARTS   AGE
test-inline-claim   0/2     Completed   0          21s

$ kubectl logs test-inline-claim with-resource | grep user_a
user_a='b'

FROM mcr.microsoft.com/oss/kubernetes/windows-host-process-containers-base-image:v1.0.0

curl -sSfL https://dl.k8s.io/release/v1.26.0-rc.1/bin/linux/amd64/kubectl -o kubectl
curl -sSfL https://dl.k8s.io/release/v1.26.0-rc.1/bin/linux/amd64/kubectl.sig -o kubectl.sig
curl -sSfL https://dl.k8s.io/release/v1.26.0-rc.1/bin/linux/amd64/kubectl.cert -o kubectl.cert

COSIGN_EXPERIMENTAL=1 cosign verify-blob kubectl --signature kubectl.sig --certificate kubectl.cert

tlog entry verified with uuid: 5d54b39222e3fa9a21bcb0badd8aac939b4b0d1d9085b37f1f10b18a8cd24657 index: 8173886
Verified OK

rekor-cli get --uuid 5d54b39222e3fa9a21bcb0badd8aac939b4b0d1d9085b37f1f10b18a8cd24657

LogID: c0d23d6ad406973f9559f3ba2d1ca01f84147d8ffc5b8445c224f98b9591801d
Index: 8173886
IntegratedTime: 2022-11-30T18:59:07Z
UUID: 24296fb24b8ad77a5d54b39222e3fa9a21bcb0badd8aac939b4b0d1d9085b37f1f10b18a8cd24657
Body: {
  "HashedRekordObj": {
    "data": {
      "hash": {
        "algorithm": "sha256",
        "value": "982dfe7eb5c27120de6262d30fa3e8029bc1da9e632ce70570e9c921d2851fc2"
      }
    },
    "signature": {
      "content": "MEQCIH0e1/0svxMoLzjeyhAaLFSHy5ZaYy0/2iQl2t3E0Pj4AiBsWmwjfLzrVyp9/v1sy70Q+FHE8miauOOVkAW2lTYVug==",
      "publicKey": {
        "content": "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"
      }
    }
  }
}

COSIGN_EXPERIMENTAL=1 cosign verify-blob kubectl \
    --signature https://dl.k8s.io/release/v1.26.0-rc.1/bin/linux/amd64/kubectl.sig \
    --certificate https://dl.k8s.io/release/v1.26.0-rc.1/bin/linux/amd64/kubectl.cert

tlog entry verified with uuid: 5d54b39222e3fa9a21bcb0badd8aac939b4b0d1d9085b37f1f10b18a8cd24657 index: 8173886
Verified OK

curl -X POST "https://localhost:10250/checkpoint/namespace/podId/container"

curl -X POST "https://localhost:10250/checkpoint/default/counters/counter"

--insecure --cert /var/run/kubernetes/client-admin.crt --key /var/run/kubernetes/client-admin.key

crictl runp pod-config.json

crictl create <POD_ID> container-config.json pod-config.json

{
  "metadata": {
      "name": "counter"
  },
  "image":{
      "image": "/var/lib/kubelet/checkpoints/<checkpoint-archive>.tar"
  }
}

newcontainer=$(buildah from scratch)
buildah add $newcontainer /var/lib/kubelet/checkpoints/checkpoint-<pod-name>_<namespace-name>-<container-name>-<timestamp>.tar /
buildah config --annotation=io.kubernetes.cri-o.annotations.checkpoint.name=<container-name> $newcontainer
buildah commit $newcontainer checkpoint-image:latest
buildah rm $newcontainer

buildah push localhost/checkpoint-image:latest container-image-registry.example/user/checkpoint-image:latest

apiVersion: v1
kind: Pod
metadata:
  namePrefix: example-
spec:
  containers:
  - name: <container-name>
    image: container-image-registry.example/user/checkpoint-image:latest
  nodeName: <destination-node>

{
  "defaultAction": "SCMP_ACT_ERRNO",
  "defaultErrnoRet": 38,
  "defaultErrno": "ENOSYS",
  "syscalls": [
    {
      "names": ["chmod", "chown", "open", "write"],
      "action": "SCMP_ACT_ALLOW"
    }
  ]
}

> cat /etc/crio/crio.conf.d/02-runtimes.conf

[crio.runtime]
default_runtime = "runc"

[crio.runtime.runtimes.runc]
allowed_annotations = [ "io.kubernetes.cri-o.seccompNotifierAction" ]

> sudo ./bin/crio --enable-metrics
…
INFO[…] Starting seccomp notifier watcher
INFO[…] Serving metrics on :9090 via HTTP
…

apiVersion: v1
kind: Pod
metadata:
  name: nginx
  annotations:
    io.kubernetes.cri-o.seccompNotifierAction: "stop"
spec:
  restartPolicy: Never
  containers:
    - name: nginx
      image: nginx:1.23.2
      securityContext:
        seccompProfile:
          type: RuntimeDefault

> kubectl apply -f nginx.yaml

> kubectl get pods -o wide
NAME    READY   STATUS    RESTARTS   AGE     IP          NODE        NOMINATED NODE   READINESS GATES
nginx   1/1     Running   0          3m39s   10.85.0.3   127.0.0.1   <none>           <none>

> curl 10.85.0.3
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
…

…
INFO[…] Injecting seccomp notifier into seccomp profile of container 662a3bb0fdc7dd1bf5a88a8aa8ef9eba6296b593146d988b4a9b85822422febb
…

> kubectl exec -it nginx -- bash

root@nginx:/# chroot /tmp
chroot: cannot change root directory to '/tmp': Function not implemented
root@nginx:/# command terminated with exit code 137

> kubectl get pods
NAME    READY   STATUS           RESTARTS   AGE
nginx   0/1     seccomp killed   0          96s

> kubectl describe pod nginx
Name:             nginx
…
Containers:
  nginx:
    …
    State:          Terminated
      Reason:       seccomp killed
      Message:      Used forbidden syscalls: chroot (1x)
      Exit Code:    137
      Started:      Mon, 14 Nov 2022 12:19:46 +0100
      Finished:     Mon, 14 Nov 2022 12:20:26 +0100
…

> kubectl exec -it nginx -- chroot /tmp
chroot: cannot change root directory to '/tmp': Function not implemented
command terminated with exit code 125
> kubectl exec -it nginx -- chroot /tmp
chroot: cannot change root directory to '/tmp': Function not implemented
command terminated with exit code 125
> kubectl exec -it nginx -- swapoff -a
command terminated with exit code 32
> kubectl exec -it nginx -- swapoff -a
command terminated with exit code 32

> kubectl describe pod nginx | grep Message
      Message:      Used forbidden syscalls: chroot (2x), swapoff (2x)

> curl -sf localhost:9090/metrics | grep seccomp_notifier
# HELP container_runtime_crio_containers_seccomp_notifier_count_total Amount of containers stopped because they used a forbidden syscalls by their name
# TYPE container_runtime_crio_containers_seccomp_notifier_count_total counter
container_runtime_crio_containers_seccomp_notifier_count_total{name="…",syscalls="chroot (1x)"} 1
container_runtime_crio_containers_seccomp_notifier_count_total{name="…",syscalls="chroot (2x), swapoff (2x)"} 1

INFO[…] The seccomp profile default action SCMP_ACT_ERRNO cannot be overridden to SCMP_ACT_NOTIFY,
        which means that syscalls using that default action can't be traced by the notifier

apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
featureGates:
  KubeletTracing: true
tracing:
  samplingRatePerMillion: 1000000

cat /etc/crio/crio.conf.d/99-tracing.conf

[crio.tracing]
enable_tracing = true
tracing_sampling_rate_per_million = 1000000

cat /etc/crio/crio.conf.d/99-runtimes.conf

[crio.runtime]
default_runtime = "runc"

[crio.runtime.runtimes.runc]
runtime_type = "pod"
monitor_path = "/path/to/conmonrs" # or will be looked up in $PATH

ScopeSpans #0
ScopeSpans SchemaURL:
InstrumentationScope go.opentelemetry.io/otel/sdk/tracer
Span #0
    Trace ID       : 71896e69f7d337730dfedb6356e74f01
    Parent ID      : a2a7714534c017e6
    ID             : 1d27dbaf38b9da8b
    Name           : github.com/cri-o/cri-o/server.(*Server).filterSandboxList
    Kind           : SPAN_KIND_INTERNAL
    Start time     : 2022-11-15 09:50:20.060325562 +0000 UTC
    End time       : 2022-11-15 09:50:20.060326291 +0000 UTC
    Status code    : STATUS_CODE_UNSET
    Status message :
Span #1
    Trace ID       : 71896e69f7d337730dfedb6356e74f01
    Parent ID      : a837a005d4389579
    ID             : a2a7714534c017e6
    Name           : github.com/cri-o/cri-o/server.(*Server).ListPodSandbox
    Kind           : SPAN_KIND_INTERNAL
    Start time     : 2022-11-15 09:50:20.060321973 +0000 UTC
    End time       : 2022-11-15 09:50:20.060330602 +0000 UTC
    Status code    : STATUS_CODE_UNSET
    Status message :
Span #2
    Trace ID       : fae6742709d51a9b6606b6cb9f381b96
    Parent ID      : 3755d12b32610516
    ID             : 0492afd26519b4b0
    Name           : github.com/cri-o/cri-o/server.(*Server).filterContainerList
    Kind           : SPAN_KIND_INTERNAL
    Start time     : 2022-11-15 09:50:20.0607746 +0000 UTC
    End time       : 2022-11-15 09:50:20.060795505 +0000 UTC
    Status code    : STATUS_CODE_UNSET
    Status message :
Events:
SpanEvent #0
     -> Name: log
     -> Timestamp: 2022-11-15 09:50:20.060778668 +0000 UTC
     -> DroppedAttributesCount: 0
     -> Attributes::
          -> id: Str(adf791e5-2eb8-4425-b092-f217923fef93)
          -> log.message: Str(No filters were applied, returning full container list)
          -> log.severity: Str(DEBUG)
          -> name: Str(/runtime.v1.RuntimeService/ListContainers)

kubectl run -it --rm --restart=Never --image=alpine alpine -- echo hi

hi
pod "alpine" deleted

FailedCreatePodSandBox: Failed to create pod sandbox: rpc error: code = Unknown desc = Error response from daemon: Head “https://us-west1-docker.pkg.dev/v2/k8s-artifacts-prod/images/pause/manifests/3.8”: x509: certificate signed by unknown authority

kubeadm init --image-repository=k8s.gcr.io

apiVersion: kubeadm.k8s.io/v1beta3
kind: ClusterConfiguration
imageRepository: "k8s.gcr.io"

kubelet --pod-infra-container-image=k8s.gcr.io/pause:3.5

---
apiVersion: kueue.x-k8s.io/v1alpha2
kind: ResourceFlavor
metadata:
  name: ondemand
  labels:
    instance-type: ondemand 
---
apiVersion: kueue.x-k8s.io/v1alpha2
kind: ResourceFlavor
metadata:
  name: spot
  labels:
    instance-type: spot
taints:
- effect: NoSchedule
  key: spot
  value: "true"

apiVersion: kueue.x-k8s.io/v1alpha2
kind: ClusterQueue
metadata:
  name: research-pool
spec:
  namespaceSelector: {}
  resources:
  - name: "cpu"
    flavors:
    - name: ondemand
      quota:
        min: 1000
    - name: spot
      quota:
        min: 2000

apiVersion: kueue.x-k8s.io/v1alpha2
kind: LocalQueue
metadata:
  name: training
  namespace: team-ml
spec:
  clusterQueue: research-pool

apiVersion: batch/v1
kind: Job
metadata:
  generateName: sample-job-
  annotations:
    kueue.x-k8s.io/queue-name: training
spec:
  parallelism: 3
  completions: 3
  template:
    spec:
      tolerations:
      - key: spot
        operator: "Exists"
        effect: "NoSchedule"
      containers:
      - name: example-batch-workload
        image: registry.example/batch/calculate-pi:3.14
        args: ["30s"]
        resources:
          requests:
            cpu: 1
      restartPolicy: Never

apiVersion: v1
kind: Pod
spec:
  hostUsers: false
  containers:
  - name: nginx
    image: docker.io/nginx

rule: |
    self.maximumSize > self.minimumSize    
message: 'Maximum size must be greater than minimum size.'

// +groupName=stable.example.com
// +versionName=v1
package v1

package v1

import (
   metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)

// An empty CRD as an example of defining a type using controller tools
// +kubebuilder:storageversion
// +kubebuilder:subresource:status
type TestCRD struct {
   metav1.TypeMeta   `json:",inline"`
   metav1.ObjectMeta `json:"metadata,omitempty"`

   Spec   TestCRDSpec   `json:"spec,omitempty"`
   Status TestCRDStatus `json:"status,omitempty"`
}

type TestCRDStatus struct {}
type TestCRDSpec struct {
   // You will fill this in as you go along
}

//go:build tools

package celimmutabilitytutorial

// Force direct dependency on code-generator so that it may be executed with go run
import (
   _ "sigs.k8s.io/controller-tools/cmd/controller-gen"
)

package celimmutabilitytutorial

//go:generate go run sigs.k8s.io/controller-tools/cmd/controller-gen crd paths=./pkg/apis/... output:dir=./crds

cd cel-immutability-tutorial
go mod init <your-org>/<your-module-name>
go mod tidy
go generate ./...

// +kubebuilder:validation:XValidation:rule="!has(oldSelf.value) || has(self.value)", message="Value is required once set"
type ImmutableSinceFirstWrite struct {
   metav1.TypeMeta   `json:",inline"`
   metav1.ObjectMeta `json:"metadata,omitempty"`

   // +kubebuilder:validation:Optional
   // +kubebuilder:validation:XValidation:rule="self == oldSelf",message="Value is immutable"
   // +kubebuilder:validation:MaxLength=512
   Value string `json:"value"`
}

# Ensure the CRD yaml is generated by controller-gen
go generate ./...
kubectl apply -f crds/stable.example.com_immutablesincefirstwrites.yaml

customresourcedefinition.apiextensions.k8s.io/immutablesincefirstwrites.stable.example.com created

kubectl apply -f - <<EOF
---
apiVersion: stable.example.com/v1
kind: ImmutableSinceFirstWrite
metadata:
  name: test1
EOF

immutablesincefirstwrite.stable.example.com/test1 created

kubectl apply -f - <<EOF
---
apiVersion: stable.example.com/v1
kind: ImmutableSinceFirstWrite
metadata:
  name: test1
value: Hello, world!
EOF

immutablesincefirstwrite.stable.example.com/test1 configured

kubectl apply -f - <<EOF
---
apiVersion: stable.example.com/v1
kind: ImmutableSinceFirstWrite
metadata:
  name: test1
value: Hello, new world!
EOF

The ImmutableSinceFirstWrite "test1" is invalid: value: Invalid value: "string": Value is immutable

kubectl apply -f - <<EOF
---
apiVersion: stable.example.com/v1
kind: ImmutableSinceFirstWrite
metadata:
  name: test1
EOF

The ImmutableSinceFirstWrite "test1" is invalid: <nil>: Invalid value: "object": Value is required once set

openAPIV3Schema:
  properties:
    value:
      maxLength: 512
      type: string
      x-kubernetes-validations:
      - message: Value is immutable
        rule: self == oldSelf
  type: object
  x-kubernetes-validations:
  - message: Value is required once set
    rule: '!has(oldSelf.value) || has(self.value)'

type ImmutableSinceCreation struct {
   metav1.TypeMeta   `json:",inline"`
   metav1.ObjectMeta `json:"metadata,omitempty"`

   // +kubebuilder:validation:Required
   // +kubebuilder:validation:XValidation:rule="self == oldSelf",message="Value is immutable"
   // +kubebuilder:validation:MaxLength=512
   Value string `json:"value"`
}

# Ensure the CRD yaml is generated by controller-gen
go generate ./...
kubectl apply -f crds/stable.example.com_immutablesincecreations.yaml

customresourcedefinition.apiextensions.k8s.io/immutablesincecreations.stable.example.com created

kubectl apply -f - <<EOF
apiVersion: stable.example.com/v1
kind: ImmutableSinceCreation
metadata:
  name: test1
EOF

The ImmutableSinceCreation "test1" is invalid:
* value: Required value
* <nil>: Invalid value: "null": some validation rules were not checked because the object was invalid; correct the existing errors to complete validation

kubectl apply -f - <<EOF
apiVersion: stable.example.com/v1
kind: ImmutableSinceCreation
metadata:
  name: test1
value: Hello, world!
EOF

immutablesincecreation.stable.example.com/test1 created

kubectl apply -f - <<EOF
apiVersion: stable.example.com/v1
kind: ImmutableSinceCreation
metadata:
  name: test1
value: Hello, new world!
EOF

The ImmutableSinceCreation "test1" is invalid: value: Invalid value: "string": Value is immutable

kubectl apply -f - <<EOF
apiVersion: stable.example.com/v1
kind: ImmutableSinceCreation
metadata:
  name: test1
EOF

The ImmutableSinceCreation "test1" is invalid:
* value: Required value
* <nil>: Invalid value: "null": some validation rules were not checked because the object was invalid; correct the existing errors to complete validation

openAPIV3Schema:
  properties:
    value:
      maxLength: 512
      type: string
      x-kubernetes-validations:
      - message: Value is immutable
        rule: self == oldSelf
  required:
  - value
  type: object

// +kubebuilder:validation:XValidation:rule="!has(oldSelf.value) || has(self.value)", message="Value is required once set"
type AppendOnlyList struct {
   metav1.TypeMeta   `json:",inline"`
   metav1.ObjectMeta `json:"metadata,omitempty"`

   // +kubebuilder:validation:Optional
   // +kubebuilder:validation:MaxItems=100
   // +kubebuilder:validation:XValidation:rule="oldSelf.all(x, x in self)",message="Values may only be added"
   Values []v1.EphemeralContainer `json:"value"`
}

# Ensure the CRD yaml is generated by controller-gen
go generate ./...
kubectl apply -f crds/stable.example.com_appendonlylists.yaml

customresourcedefinition.apiextensions.k8s.io/appendonlylists.stable.example.com created

kubectl apply -f - <<EOF
---
apiVersion: stable.example.com/v1
kind: AppendOnlyList
metadata:
  name: testlist
value:
  - name: container1
    image: nginx/nginx
EOF

appendonlylist.stable.example.com/testlist created

kubectl apply -f - <<EOF
---
apiVersion: stable.example.com/v1
kind: AppendOnlyList
metadata:
  name: testlist
value:
  - name: container1
    image: nginx/nginx
  - name: container2
    image: mongodb/mongodb
EOF

appendonlylist.stable.example.com/testlist configured

kubectl apply -f - <<EOF
---
apiVersion: stable.example.com/v1
kind: AppendOnlyList
metadata:
  name: testlist
value:
  - name: container1
    image: nginx/nginx
EOF

The AppendOnlyList "testlist" is invalid: value: Invalid value: "array": Values may only be added

kubectl apply -f - <<EOF
---
apiVersion: stable.example.com/v1
kind: AppendOnlyList
metadata:
  name: testlist
EOF

The AppendOnlyList "testlist" is invalid: <nil>: Invalid value: "object": Value is required once set

openAPIV3Schema:
  properties:
    value:
      items: ...
      maxItems: 100
      type: array
      x-kubernetes-validations:
      - message: Values may only be added
        rule: oldSelf.all(x, x in self)
  type: object
  x-kubernetes-validations:
  - message: Value is required once set
    rule: '!has(oldSelf.value) || has(self.value)'

// A map which does not allow keys to be removed or their values changed once set. New keys may be added, however.
// +kubebuilder:validation:XValidation:rule="!has(oldSelf.values) || has(self.values)", message="Value is required once set"
type MapAppendOnlyKeys struct {
	metav1.TypeMeta   `json:",inline"`
	metav1.ObjectMeta `json:"metadata,omitempty"`

	// +kubebuilder:validation:Optional
	// +kubebuilder:validation:MaxProperties=10
	// +kubebuilder:validation:XValidation:rule="oldSelf.all(key, key in self && self[key] == oldSelf[key])",message="Keys may not be removed and their values must stay the same"
	Values map[string]string `json:"values,omitempty"`
}

# Ensure the CRD yaml is generated by controller-gen
go generate ./...
kubectl apply -f crds/stable.example.com_mapappendonlykeys.yaml

customresourcedefinition.apiextensions.k8s.io/mapappendonlykeys.stable.example.com created

kubectl apply -f - <<EOF
---
apiVersion: stable.example.com/v1
kind: MapAppendOnlyKeys
metadata:
  name: testmap
values:
    key1: value1
EOF

mapappendonlykeys.stable.example.com/testmap created

kubectl apply -f - <<EOF
---
apiVersion: stable.example.com/v1
kind: MapAppendOnlyKeys
metadata:
  name: testmap
values:
    key1: value1
    key2: value2
EOF

mapappendonlykeys.stable.example.com/testmap configured

kubectl apply -f - <<EOF
---
apiVersion: stable.example.com/v1
kind: MapAppendOnlyKeys
metadata:
  name: testmap
values:
    key1: value1
EOF

The MapAppendOnlyKeys "testmap" is invalid: values: Invalid value: "object": Keys may not be removed and their values must stay the same

kubectl apply -f - <<EOF
---
apiVersion: stable.example.com/v1
kind: MapAppendOnlyKeys
metadata:
  name: testmap
EOF

The MapAppendOnlyKeys "testmap" is invalid: <nil>: Invalid value: "object": Value is required once set

openAPIV3Schema:
  description: A map which does not allow keys to be removed or their values
    changed once set. New keys may be added, however.
  properties:
    values:
      additionalProperties:
        type: string
      maxProperties: 10
      type: object
      x-kubernetes-validations:
      - message: Keys may not be removed and their values must stay the same
        rule: oldSelf.all(key, key in self && self[key] == oldSelf[key])
  type: object
  x-kubernetes-validations:
  - message: Value is required once set
    rule: '!has(oldSelf.values) || has(self.values)'

apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
    ...
    openAPIV3Schema:
      type: object
      properties:
        spec:
          type: object
          x-kubernetes-validations:
            - rule: "self.minReplicas <= self.replicas && self.replicas <= self.maxReplicas"
              message: "replicas should be in the range minReplicas..maxReplicas."
          properties:
            replicas:
              type: integer
            ...

type: integer
minimum: 0
maximum: 100
type:
maxItems: 100
type: string
format: date-time
x-kubernetes-validations:
  - rule: "self >= timestamp('2000-01-01T00:00:00.000Z')"
type: object
properties:
  set1:
    type: array
    x-kubernetes-list-type: set
  set2: ...
  x-kubernetes-validations:
    - rule: "!self.set1.all(e, !(e in self.set2))"
csi.storage.k8s.io/node-expand-secret-name: test-secret
csi.storage.k8s.io/node-expand-secret-namespace: default

apiVersion: v1
kind: Secret
metadata:
  name: test-secret
  namespace: default
data:
stringData:
  username: admin
  password: t0p-Secret

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: csi-blockstorage-sc
parameters:
  csi.storage.k8s.io/node-expand-secret-name: test-secret   # the name of the Secret
  csi.storage.k8s.io/node-expand-secret-namespace: default  # the namespace that the Secret is in
provisioner: blockstorage.cloudprovider.example
reclaimPolicy: Delete
volumeBindingMode: Immediate
allowVolumeExpansion: true

apiVersion: v1
kind: PersistentVolume
metadata:
  annotations:
    pv.kubernetes.io/provisioned-by: blockstorage.cloudprovider.example
  creationTimestamp: "2022-08-26T15:14:07Z"
  finalizers:
  - kubernetes.io/pv-protection
  name: pvc-95eb531a-d675-49f6-940b-9bc3fde83eb0
  resourceVersion: "420263"
  uid: 6fa824d7-8a06-4e0c-b722-d3f897dcbd65
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 6Gi
  claimRef:
    apiVersion: v1
    kind: PersistentVolumeClaim
    name: csi-pvc
    namespace: default
    resourceVersion: "419862"
    uid: 95eb531a-d675-49f6-940b-9bc3fde83eb0
  csi:
    driver: blockstorage.cloudprovider.example
    nodeExpandSecretRef:
      name: test-secret
      namespace: default
    volumeAttributes:
      storage.kubernetes.io/csiProvisionerIdentity: 1648042783218-8081-blockstorage.cloudprovider.example
    volumeHandle: e21c7809-aabb-11ec-917a-2e2e254eb4cf
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: topology.hostpath.csi/node
          operator: In
          values:
          - racknode01
  persistentVolumeReclaimPolicy: Delete
  storageClassName: csi-blockstorage-sc
  volumeMode: Filesystem
status:
  phase: Bound

I0330 03:29:51.966241       1 server.go:101] GRPC call: /csi.v1.Node/NodeExpandVolume
I0330 03:29:51.966261       1 server.go:105] GRPC request: {"capacity_range":{"required_bytes":7516192768},"secrets":"***stripped***","staging_target_path":"/var/lib/kubelet/plugins/kubernetes.io/csi/blockstorage.cloudprovider.example/f7c62e6e08ce21e9b2a95c841df315ed4c25a15e91d8fcaf20e1c2305e5300ab/globalmount","volume_capability":{"AccessType":{"Mount":{}},"access_mode":{"mode":7}},"volume_id":"e21c7809-aabb-11ec-917a-2e2e254eb4cf","volume_path":"/var/lib/kubelet/pods/bcb1b2c4-5793-425c-acf1-47163a81b4d7/volumes/kubernetes.io~csi/pvc-95eb531a-d675-49f6-940b-9bc3fde83eb0/mount"}
I0330 03:29:51.966360       1 nodeserver.go:459] req:volume_id:"e21c7809-aabb-11ec-917a-2e2e254eb4cf" volume_path:"/var/lib/kubelet/pods/bcb1b2c4-5793-425c-acf1-47163a81b4d7/volumes/kubernetes.io~csi/pvc-95eb531a-d675-49f6-940b-9bc3fde83eb0/mount" capacity_range:<required_bytes:7516192768 > staging_target_path:"/var/lib/kubelet/plugins/kubernetes.io/csi/blockstorage.cloudprovider.example/f7c62e6e08ce21e9b2a95c841df315ed4c25a15e91d8fcaf20e1c2305e5300ab/globalmount" volume_capability:<mount:<> access_mode:<mode:SINGLE_NODE_MULTI_WRITER > > secrets:<key:"XXXXXX" value:"XXXXX" > secrets:<key:"XXXXX" value:"XXXXXX" >

apiVersion: v1
kind: Pod
metadata:
  name: frontend
spec:
  containers:
  - name: app
    image: images.my-company.example/app:v4
    resources:
      requests:
        ephemeral-storage: "8Gi"
      limits:
        ephemeral-storage: "12Gi"
    volumeMounts:
    - name: ephemeral
      mountPath: "/tmp"
  - name: log-aggregator
    image: images.my-company.example/log-aggregator:v6
    resources:
      requests:
        ephemeral-storage: "2Gi"
    volumeMounts:
    - name: ephemeral
      mountPath: "/tmp"
  volumes:
    - name: ephemeral
      emptyDir: {}
        sizeLimit: 5Gi

apiVersion: v1
kind: ResourceQuota
metadata:
  name: storage-resources
spec:
  hard:
    requests.ephemeral-storage: "10Gi"
    limits.ephemeral-storage: "20Gi"

apiVersion: v1
kind: LimitRange
metadata:
  name: storage-limit-range
spec:
  limits:
  - default:
      ephemeral-storage: 10Gi
    defaultRequest:
      ephemeral-storage: 5Gi
    type: Container

kubectl rollout restart daemonset <name_of_the_daemonset>
kubectl get pods -w

$ kubectl describe pod nginx1
Name:             nginx1
Namespace:        default
...
Conditions:
  Type              Status
  PodHasNetwork     True
  Initialized       True
  Ready             True
  ContainersReady   True
  PodScheduled      True

$ kubectl describe pod nginx2
Name:             nginx2
Namespace:        default
...
Conditions:
  Type              Status
  PodHasNetwork     False
  Initialized       True
  Ready             False
  ContainersReady   False
  PodScheduled      True

apiVersion: storage.k8s.io/v1
kind: CSIDriver
metadata:
  name: secrets-store.csi.k8s.io
spec:
  podInfoOnMount: true
  attachRequired: false
  volumeLifecycleModes:
  - Ephemeral

kind: Pod
apiVersion: v1
metadata:
  name: my-csi-app-inline
spec:
  containers:
    - name: my-frontend
      image: busybox
      volumeMounts:
      - name: secrets-store-inline
        mountPath: "/mnt/secrets-store"
        readOnly: true
      command: [ "sleep", "1000000" ]
  volumes:
    - name: secrets-store-inline
      csi:
        driver: secrets-store.csi.k8s.io
        readOnly: true
        volumeAttributes:
          secretProviderClass: "my-provider"

      csi:
        driver: block.csi.vendor.example
        volumeAttributes:
          foo: bar

pods "admin-pod" is forbidden: violates PodSecurity "restricted:latest": non-default capabilities (container "admin" must not include "SYS_ADMIN" in securityContext.capabilities.add), unrestricted capabilities (container "admin" must not include "SYS_ADMIN" in securityContext.capabilities.add)

pods "admin-pod" is forbidden: violates PodSecurity "restricted:latest": unrestricted capabilities (container "admin" must not include "SYS_ADMIN" in securityContext.capabilities.add)

Warning: frontend-h23gf2: allowPrivilegeEscalation != false
Warning: myjob-g342hj (and 6 other pods): host namespaces, allowPrivilegeEscalation != false Warning: backend-j23h42 (and 1 other pod): non-default capabilities, unrestricted capabilities

Warning: namespace 'kube-system' is exempt from Pod Security, and the policy (enforce=baseline:latest) will be ignored

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: web
  namespace: default
spec:
  podManagementPolicy: OrderedReady  # you must set OrderedReady
  replicas: 5
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      # image changed since publication (previously used registry "k8s.gcr.io")
      - image: registry.k8s.io/nginx-slim:0.8
        imagePullPolicy: IfNotPresent
        name: nginx
  updateStrategy:
    rollingUpdate:
      maxUnavailable: 2 # this is the new alpha field, whose default value is 1
      partition: 0
    type: RollingUpdate

kubectl get pods --watch 

NAME    READY   STATUS    RESTARTS   AGE
web-0   1/1     Running   0          85s
web-1   1/1     Running   0          2m6s
web-2   1/1     Running   0          106s
web-3   1/1     Running   0          2m47s
web-4   1/1     Running   0          2m27s
web-4   1/1     Terminating   0          5m43s ----> start terminating 4
web-3   1/1     Terminating   0          6m3s  ----> start terminating 3
web-3   0/1     Terminating   0          6m7s
web-3   0/1     Pending       0          0s
web-3   0/1     Pending       0          0s
web-4   0/1     Terminating   0          5m48s
web-4   0/1     Terminating   0          5m48s
web-3   0/1     ContainerCreating   0          2s
web-3   1/1     Running             0          2s
web-4   0/1     Pending             0          0s
web-4   0/1     Pending             0          0s
web-4   0/1     ContainerCreating   0          0s
web-4   1/1     Running             0          1s
web-2   1/1     Terminating         0          5m46s ----> start terminating 2 (only after both 4 and 3 are running)
web-1   1/1     Terminating         0          6m6s  ----> start terminating 1
web-2   0/1     Terminating         0          5m47s
web-1   0/1     Terminating         0          6m7s
web-1   0/1     Pending             0          0s
web-1   0/1     Pending             0          0s
web-1   0/1     ContainerCreating   0          1s
web-1   1/1     Running             0          2s
web-2   0/1     Pending             0          0s
web-2   0/1     Pending             0          0s
web-2   0/1     ContainerCreating   0          0s
web-2   1/1     Running             0          1s
web-0   1/1     Terminating         0          6m6s ----> start terminating 0 (only after 2 and 1 are running)
web-0   0/1     Terminating         0          6m7s
web-0   0/1     Pending             0          0s
web-0   0/1     Pending             0          0s
web-0   0/1     ContainerCreating   0          0s
web-0   1/1     Running             0          1s

I1112 14:06:35.783529  328441 structured_logging.go:51] "using InfoS" longData={Name:long Data:Multiple
lines
with quite a bit
of text. internal:0}
I1112 14:06:35.783549  328441 structured_logging.go:52] "using InfoS with\nthe message across multiple lines" int=1 stringData="long: Multiple\nlines\nwith quite a bit\nof text." str="another value"

I1126 10:31:50.378204  121736 structured_logging.go:59] "using InfoS" longData=<
	{Name:long Data:Multiple
	lines
	with quite a bit
	of text. internal:0}
 >
I1126 10:31:50.378228  121736 structured_logging.go:60] "using InfoS with\nthe message across multiple lines" int=1 stringData=<
	long: Multiple
	lines
	with quite a bit
	of text.
 > str="another value"

$ cd $GOPATH/src/k8s.io/kubernetes/staging/src/k8s.io/component-base/logs/example/cmd/
$ go run . --help
...
      --feature-gates mapStringBool  A set of key=value pairs that describe feature gates for alpha/experimental features. Options are:
                                     AllAlpha=true|false (ALPHA - default=false)
                                     AllBeta=true|false (BETA - default=false)
                                     ContextualLogging=true|false (ALPHA - default=false)
$ go run . --feature-gates ContextualLogging=true
...
I0404 18:00:02.916429  451895 logger.go:94] "example/myname: runtime" foo="bar" duration="1m0s"
I0404 18:00:02.916447  451895 logger.go:95] "example: another runtime" foo="bar" duration="1m0s"

apiVersion: v1
kind: Service
metadata:
  labels:
    k8s-app: kube-dns
    kubernetes.io/cluster-service: "true"
    kubernetes.io/name: CoreDNS
  name: kube-dns
  namespace: kube-system
spec:
  clusterIP: 10.96.0.10
  ports:
  - name: dns
    port: 53
    protocol: UDP
    targetPort: 53
  - name: dns-tcp
    port: 53
    protocol: TCP
    targetPort: 53
  selector:
    k8s-app: kube-dns
  type: ClusterIP

$ kubectl get pod -o wide
NAME    READY   STATUS        RESTARTS   AGE   IP           NODE                      NOMINATED NODE   READINESS GATES
web-0   1/1     Running       0          100m   10.244.2.4   k8s-node-876-1639279816   <none>           <none>
web-1   1/1     Terminating   0          100m   10.244.1.3   k8s-node-433-1639279804   <none>           <none>

$ kubectl taint nodes <node-name> node.kubernetes.io/out-of-service=nodeshutdown:NoExecute

$ kubectl get pod -o wide
NAME    READY   STATUS    RESTARTS   AGE    IP           NODE                      NOMINATED NODE   READINESS GATES
web-0   1/1     Running   0          150m   10.244.2.4   k8s-node-876-1639279816   <none>           <none>
web-1   1/1     Running   0          10m    10.244.1.7   k8s-node-433-1639279804   <none>           <none>

kubectl get volumesnapshot -n <namespace>

kind: VolumeSnapshotContent
metadata:
  annotations:
    - snapshot.storage.kubernetes.io/allowVolumeModeChange: "true"
...

apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshotContent
metadata:
  annotations:
  - snapshot.storage.kubernetes.io/allowVolumeModeChange: "true"
  name: new-snapshot-content-test
spec:
  deletionPolicy: Delete
  driver: hostpath.csi.k8s.io
  source:
    snapshotHandle: 7bdd0de3-aaeb-11e8-9aae-0242ac110002
  sourceVolumeMode: Filesystem
  volumeSnapshotRef:
    name: new-snapshot-test
    namespace: default

kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/volume-data-source-validator/v1.0.1/client/config/crd/populator.storage.k8s.io_volumepopulators.yaml
kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/volume-data-source-validator/v1.0.1/deploy/kubernetes/rbac-data-source-validator.yaml
kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/volume-data-source-validator/v1.0.1/deploy/kubernetes/setup-data-source-validator.yaml

kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/lib-volume-populator/v1.0.1/example/hello-populator/crd.yaml
kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/lib-volume-populator/87a47467b86052819e9ad13d15036d65b9a32fbb/example/hello-populator/deploy.yaml

apiVersion: hello.example.com/v1alpha1
kind: Hello
metadata:
  name: example-hello
spec:
  fileName: example.txt
  fileContents: Hello, world!

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: example-pvc
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 10Mi
  dataSourceRef:
    apiGroup: hello.example.com
    kind: Hello
    name: example-hello
  volumeMode: Filesystem

apiVersion: batch/v1
kind: Job
metadata:
  name: example-job
spec:
  template:
    spec:
      containers:
        - name: example-container
          image: busybox:latest
          command:
            - cat
            - /mnt/example.txt
          volumeMounts:
            - name: vol
              mountPath: /mnt
      restartPolicy: Never
      volumes:
        - name: vol
          persistentVolumeClaim:
            claimName: example-pvc

kubectl wait --for=condition=Complete job/example-job

kubectl logs job/example-job

Hello, world!

gcloud container clusters create test-grpc \
    --enable-kubernetes-alpha \
    --no-enable-autorepair \
    --no-enable-autoupgrade \
    --release-channel=rapid \
    --cluster-version=1.23

gcloud container clusters get-credentials test-grpc

---
apiVersion: v1
kind: Pod
metadata:
  name: test-grpc
spec:
  containers:
  - name: agnhost
    # image changed since publication (previously used registry "k8s.gcr.io")
    image: registry.k8s.io/e2e-test-images/agnhost:2.35
    command: ["/agnhost", "grpc-health-checking"]
    ports:
    - containerPort: 5000
    - containerPort: 8080
    readinessProbe:
      grpc:
        port: 5000

kubectl apply -f test.yaml
kubectl describe test-grpc

Conditions:
  Type              Status
  Initialized       True
  Ready             True
  ContainersReady   True
  PodScheduled      True

kubectl port-forward test-grpc 8080:8080

curl http://localhost:8080/make-not-serving

kubectl describe pod test-grpc

Conditions:
  Type              Status
  Initialized       True
  Ready             False
  ContainersReady   False
  PodScheduled      True

...

  Warning  Unhealthy  2s (x6 over 42s)  kubelet            Readiness probe failed: service unhealthy (responded with "NOT_SERVING")

curl http://localhost:8080/make-serving
kubectl describe test-grpc

Conditions:
  Type              Status
  Initialized       True
  Ready             True
  ContainersReady   True
  PodScheduled      True

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: myclaim
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi # specify new size here

kubectl describe pvc <pvc>

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: gp2-default
provisioner: kubernetes.io/aws-ebs
parameters:
  secretNamespace: ""
  secretName: ""
allowVolumeExpansion: true

capabilities:
  drop:
  - ALL
  add:
  - NET_BIND_SERVICE
  - SYS_CHROOT

controller:
  image:
    chroot: true

location /randomthing/ {
      alias /;
      autoindex on;
}

apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingWebhookConfiguration
metadata:
  name: example-validating-webhook-config
webhooks:
  - name: validate-pod-interaction.example.com
    sideEffects: None
    rules:
      - apiGroups: ["*"]
        apiVersions: ["*"]
        operations: ["CONNECT"]
        resources: ["pods/exec", "pods/attach"]
    failurePolicy: Fail
    clientConfig:
      service:
        # reference to kube-exec-controller service deployed inside the K8s cluster
        name: example-service
        namespace: kube-exec-controller
        path: "/admit-pod-interaction"
      caBundle: "{{VALUE}}" # PEM encoded CA bundle to validate kube-exec-controller's certificate
    admissionReviewVersions: ["v1", "v1beta1"]

$ kubectl get pod --show-labels
NAME      READY  STATUS   RESTARTS  AGE  LABELS
test-pod  1/1    Running  0         2s   box.com/podInitialInteractionTimestamp=1632524400,box.com/podInteractorUsername=username-1,box.com/podTTLDuration=1h0m0s

$ kubectl describe pod test-pod
...
Events:
Type       Reason            Age     From                            Message
----       ------            ----    ----                            -------
Warning    PodInteraction    5s      admission-controller-service    Pod was interacted with 'kubectl exec' command by user 'username-1' initially at time 2021-09-24 16:00:00 -0800 PST
Warning    PodInteraction    5s      admission-controller-service    Pod will be evicted at time 2021-09-24 17:00:00 -0800 PST (in about 1h0m0s).

$ kubectl pi get test-pod
POD-NAME  INTERACTOR  POD-TTL  EXTENSION  EXTENSION-REQUESTER  EVICTION-TIME
test-pod  username-1  1h0m0s   /          /                    2021-09-24 17:00:00 -0800 PST

$ kubectl pi extend test-pod --duration=30m
Successfully extended the termination time of pod/test-pod with a duration=30m
 
$ kubectl pi get test-pod
POD-NAME  INTERACTOR  POD-TTL  EXTENSION  EXTENSION-REQUESTER  EVICTION-TIME
test-pod  username-1  1h0m0s   30m        username-2           2021-09-24 17:30:00 -0800 PST

kubectl get pvc example-vanilla-block-pvc

NAME                        STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS               AGE
example-vanilla-block-pvc   Bound    pvc-6791fdd4-5fad-438e-a7fb-16410363e3da   5Gi        RWO            example-vanilla-block-sc   19s

kubectl delete pv pvc-6791fdd4-5fad-438e-a7fb-16410363e3da

persistentvolume "pvc-6791fdd4-5fad-438e-a7fb-16410363e3da" deleted
^C

kubectl get pv pvc-6791fdd4-5fad-438e-a7fb-16410363e3da

NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS        CLAIM                               STORAGECLASS               REASON   AGE
pvc-6791fdd4-5fad-438e-a7fb-16410363e3da   5Gi        RWO            Delete           Terminating   default/example-vanilla-block-pvc   example-vanilla-block-sc            2m23s

kubectl delete pvc example-vanilla-block-pvc

persistentvolumeclaim "example-vanilla-block-pvc" deleted

kubectl get pv pvc-6791fdd4-5fad-438e-a7fb-16410363e3da

Error from server (NotFound): persistentvolumes "pvc-6791fdd4-5fad-438e-a7fb-16410363e3da" not found

kubectl get pv pvc-a7b7e3ba-f837-45ba-b243-dec7d8aaed53 -o yaml

apiVersion: v1
kind: PersistentVolume
metadata:
  annotations:
    pv.kubernetes.io/provisioned-by: csi.vsphere.vmware.com
  creationTimestamp: "2021-11-17T19:28:56Z"
  finalizers:
  - kubernetes.io/pv-protection
  - external-provisioner.volume.kubernetes.io/finalizer
  name: pvc-a7b7e3ba-f837-45ba-b243-dec7d8aaed53
  resourceVersion: "194711"
  uid: 087f14f2-4157-4e95-8a70-8294b039d30e
spec:
  accessModes:
  - ReadWriteOnce
  capacity:
    storage: 1Gi
  claimRef:
    apiVersion: v1
    kind: PersistentVolumeClaim
    name: example-vanilla-block-pvc
    namespace: default
    resourceVersion: "194677"
    uid: a7b7e3ba-f837-45ba-b243-dec7d8aaed53
  csi:
    driver: csi.vsphere.vmware.com
    fsType: ext4
    volumeAttributes:
      storage.kubernetes.io/csiProvisionerIdentity: 1637110610497-8081-csi.vsphere.vmware.com
      type: vSphere CNS Block Volume
    volumeHandle: 2dacf297-803f-4ccc-afc7-3d3c3f02051e
  persistentVolumeReclaimPolicy: Delete
  storageClassName: example-vanilla-block-sc
  volumeMode: Filesystem
status:
  phase: Bound

kind create cluster --image kindest/node:v1.23.0

kubectl cluster-info --context kind-kind

kubectl get nodes

NAME                 STATUS   ROLES                  AGE   VERSION
kind-control-plane   Ready    control-plane,master   54m   v1.23.0

kubectl -n kube-system exec kube-apiserver-kind-control-plane -it -- kube-apiserver -h | grep "default enabled ones"

...
      --enable-admission-plugins strings
admission plugins that should be enabled in addition
to default enabled ones (NamespaceLifecycle, LimitRanger,
ServiceAccount, TaintNodesByCondition, PodSecurity, Priority,
DefaultTolerationSeconds, DefaultStorageClass,
StorageObjectInUseProtection, PersistentVolumeClaimResize,
RuntimeClass, CertificateApproval, CertificateSigning,
CertificateSubjectRestriction, DefaultIngressClass,
MutatingAdmissionWebhook, ValidatingAdmissionWebhook,
ResourceQuota).
...

kubectl create namespace verify-pod-security
kubectl label namespace verify-pod-security pod-security.kubernetes.io/enforce=restricted
# The following command does NOT create a workload (--dry-run=server)
kubectl -n verify-pod-security run test --dry-run=server --image=busybox --privileged
kubectl delete namespace verify-pod-security

Error from server (Forbidden): pods "test" is forbidden: violates PodSecurity "restricted:latest": privileged (container "test" must not set securityContext.privileged=true), allowPrivilegeEscalation != false (container "test" must set securityContext.allowPrivilegeEscalation=false), unrestricted capabilities (container "test" must set securityContext.capabilities.drop=["ALL"]), runAsNonRoot != true (pod or container "test" must set securityContext.runAsNonRoot=true), seccompProfile (pod or container "test" must set securityContext.seccompProfile.type to "RuntimeDefault" or "Localhost")

kubectl create namespace verify-pod-security

# enforces a "restricted" security policy and audits on restricted
kubectl label --overwrite ns verify-pod-security \
  pod-security.kubernetes.io/enforce=restricted \
  pod-security.kubernetes.io/audit=restricted

cat <<EOF | kubectl -n verify-pod-security apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: busybox-privileged
spec:
  containers:
  - name: busybox
    image: busybox
    args:
    - sleep
    - "1000000"
    securityContext:
      allowPrivilegeEscalation: true
EOF

Error from server (Forbidden): error when creating "STDIN": pods "busybox-privileged" is forbidden: violates PodSecurity "restricted:latest": allowPrivilegeEscalation != false (container "busybox" must set securityContext.allowPrivilegeEscalation=false), unrestricted capabilities (container "busybox" must set securityContext.capabilities.drop=["ALL"]), runAsNonRoot != true (pod or container "busybox" must set securityContext.runAsNonRoot=true), seccompProfile (pod or container "busybox" must set securityContext.seccompProfile.type to "RuntimeDefault" or "Localhost")

# enforces a "privileged" security policy and warns / audits on baseline
kubectl label --overwrite ns verify-pod-security \
  pod-security.kubernetes.io/enforce=privileged \
  pod-security.kubernetes.io/warn=baseline \
  pod-security.kubernetes.io/audit=baseline

cat <<EOF | kubectl -n verify-pod-security apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: busybox-privileged
spec:
  containers:
  - name: busybox
    image: busybox
    args:
    - sleep
    - "1000000"
    securityContext:
      allowPrivilegeEscalation: true
EOF

pod/busybox-privileged created

kubectl -n verify-pod-security delete pod busybox-privileged

# enforces a "restricted" security policy and audits on restricted
kubectl label --overwrite ns verify-pod-security \
  pod-security.kubernetes.io/enforce=restricted \
  pod-security.kubernetes.io/audit=restricted

cat <<EOF | kubectl -n verify-pod-security apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: busybox-baseline
spec:
  containers:
  - name: busybox
    image: busybox
    args:
    - sleep
    - "1000000"
    securityContext:
      allowPrivilegeEscalation: false
      capabilities:
        add:
          - NET_BIND_SERVICE
          - CHOWN
EOF

Error from server (Forbidden): error when creating "STDIN": pods "busybox-baseline" is forbidden: violates PodSecurity "restricted:latest": unrestricted capabilities (container "busybox" must set securityContext.capabilities.drop=["ALL"]; container "busybox" must not include "CHOWN" in securityContext.capabilities.add), runAsNonRoot != true (pod or container "busybox" must set securityContext.runAsNonRoot=true), seccompProfile (pod or container "busybox" must set securityContext.seccompProfile.type to "RuntimeDefault" or "Localhost")

# enforces a "baseline" security policy and warns / audits on restricted
kubectl label --overwrite ns verify-pod-security \
  pod-security.kubernetes.io/enforce=baseline \
  pod-security.kubernetes.io/warn=restricted \
  pod-security.kubernetes.io/audit=restricted

cat <<EOF | kubectl -n verify-pod-security apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: busybox-baseline
spec:
  containers:
  - name: busybox
    image: busybox
    args:
    - sleep
    - "1000000"
    securityContext:
      allowPrivilegeEscalation: false
      capabilities:
        add:
          - NET_BIND_SERVICE
          - CHOWN
EOF

Warning: would violate PodSecurity "restricted:latest": unrestricted capabilities (container "busybox" must set securityContext.capabilities.drop=["ALL"]; container "busybox" must not include "CHOWN" in securityContext.capabilities.add), runAsNonRoot != true (pod or container "busybox" must set securityContext.runAsNonRoot=true), seccompProfile (pod or container "busybox" must set securityContext.seccompProfile.type to "RuntimeDefault" or "Localhost")
pod/busybox-baseline created

kubectl -n verify-pod-security delete pod busybox-baseline

# enforces a "restricted" security policy and audits on restricted
kubectl label --overwrite ns verify-pod-security \
  pod-security.kubernetes.io/enforce=restricted \
  pod-security.kubernetes.io/audit=restricted

cat <<EOF | kubectl -n verify-pod-security apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: busybox-restricted
spec:
  containers:
  - name: busybox
    image: busybox
    args:
    - sleep
    - "1000000"
    securityContext:
      allowPrivilegeEscalation: false
      capabilities:
        add:
          - NET_BIND_SERVICE
EOF

Error from server (Forbidden): error when creating "STDIN": pods "busybox-restricted" is forbidden: violates PodSecurity "restricted:latest": unrestricted capabilities (container "busybox" must set securityContext.capabilities.drop=["ALL"]), runAsNonRoot != true (pod or container "busybox" must set securityContext.runAsNonRoot=true), seccompProfile (pod or container "busybox" must set securityContext.seccompProfile.type to "RuntimeDefault" or "Localhost")

cat <<EOF | kubectl -n verify-pod-security apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: busybox-restricted
spec:
  containers:
  - name: busybox
    image: busybox
    args:
    - sleep
    - "1000000"
    securityContext:
      seccompProfile:
        type: RuntimeDefault
      runAsNonRoot: true
      allowPrivilegeEscalation: false
      capabilities:
        drop:
          - ALL
        add:
          - NET_BIND_SERVICE
EOF

pod/busybox-restricted created

NAME               READY   STATUS                       RESTARTS   AGE
busybox-restricted   0/1     CreateContainerConfigError   0          2m26s

Events:
  Type     Reason     Age                    From               Message
  ----     ------     ----                   ----               -------
  Warning  Failed     2m29s (x8 over 3m55s)  kubelet            Error: container has runAsNonRoot and image will run as root (pod: "busybox-restricted_verify-pod-security(a4c6a62d-2166-41a9-b288-20df17cf5c90)", container: busybox)

# delete the original pod
kubectl -n verify-pod-security delete pod busybox-restricted

# create the pod again with new runAsUser
cat <<EOF | kubectl -n verify-pod-security apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: busybox-restricted
spec:
  securityContext:
    runAsUser: 65534
  containers:
  - name: busybox
    image: busybox
    args:
    - sleep
    - "1000000"
    securityContext:
      seccompProfile:
        type: RuntimeDefault
      runAsNonRoot: true
      allowPrivilegeEscalation: false
      capabilities:
        drop:
          - ALL
        add:
          - NET_BIND_SERVICE
EOF

NAME                 READY   STATUS    RESTARTS   AGE
busybox-restricted   1/1     Running   0          25s

kubectl delete namespace verify-pod-security

# if using docker, shell into the control plane
docker exec -it kind-control-plane bash

# list running containers
crictl ps

# inspect each one by container ID
crictl inspect <CONTAINER ID>

kind delete cluster

cat <<EOF > pod-security.yaml
apiVersion: apiserver.config.k8s.io/v1
kind: AdmissionConfiguration
plugins:
- name: PodSecurity
  configuration:
    apiVersion: pod-security.admission.config.k8s.io/v1beta1
    kind: PodSecurityConfiguration
    defaults:
      enforce: "baseline"
      enforce-version: "latest"
      audit: "baseline"
      audit-version: "latest"
      warn: "restricted"
      warn-version: "latest"
    exemptions:
      # Array of authenticated usernames to exempt.
      usernames: []
      # Array of runtime class names to exempt.
      runtimeClasses: []
      # Array of namespaces to exempt.
      namespaces: [kube-system]
EOF

cat <<EOF > kind-config.yaml
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
nodes:
- role: control-plane
  kubeadmConfigPatches:
  - |
    kind: ClusterConfiguration
    apiServer:
        # enable admission-control-config flag on the API server
        extraArgs:
          admission-control-config-file: /etc/kubernetes/policies/pod-security.yaml
        # mount new file / directories on the control plane
        extraVolumes:
          - name: policies
            hostPath: /etc/kubernetes/policies
            mountPath: /etc/kubernetes/policies
            readOnly: true
            pathType: "DirectoryOrCreate"
  # mount the local file on the control plane
  extraMounts:
  - hostPath: ./pod-security.yaml
    containerPath: /etc/kubernetes/policies/pod-security.yaml
    readOnly: true
EOF

kind create cluster --image kindest/node:v1.23.0 --config kind-config.yaml

kubectl describe namespace default

Name:         default
Labels:       kubernetes.io/metadata.name=default
Annotations:  <none>
Status:       Active

No resource quota.

No LimitRange resource.

kubectl create namespace test-defaults
kubectl describe namespace test-defaults

Name:         test-defaults
Labels:       kubernetes.io/metadata.name=test-defaults
Annotations:  <none>
Status:       Active

No resource quota.

No LimitRange resource.

cat <<EOF | kubectl -n test-defaults apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: busybox-privileged
spec:
  containers:
  - name: busybox
    image: busybox
    args:
    - sleep
    - "1000000"
    securityContext:
      allowPrivilegeEscalation: true
EOF

Warning: would violate PodSecurity "restricted:latest": allowPrivilegeEscalation != false (container "busybox" must set securityContext.allowPrivilegeEscalation=false), unrestricted capabilities (container "busybox" must set securityContext.capabilities.drop=["ALL"]), runAsNonRoot != true (pod or container "busybox" must set securityContext.runAsNonRoot=true), seccompProfile (pod or container "busybox" must set securityContext.seccompProfile.type to "RuntimeDefault" or "Localhost")
pod/busybox-privileged created

# if using docker, shell into the control plane
docker exec -it kind-control-plane bash

# cat out the file we mounted
cat /etc/kubernetes/policies/pod-security.yaml

# check the api server logs
cat /var/log/containers/kube-apiserver*.log 

# check the api server config
cat /etc/kubernetes/manifests/kube-apiserver.yaml 

# delete the original pod
kubectl -n test-defaults delete pod busybox-privileged

cat <<EOF | kubectl -n test-defaults apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: busybox-privileged
spec:
  containers:
  - name: busybox
    image: busybox
    args:
    - sleep
    - "1000000"
  hostNetwork: true
EOF

Error from server (Forbidden): error when creating "STDIN": pods "busybox-privileged" is forbidden: violates PodSecurity "baseline:latest": host namespaces (hostNetwork=true)

kubectl get --raw /metrics | grep pod_security_evaluations_total

# HELP pod_security_evaluations_total [ALPHA] Number of policy evaluations that occurred, not counting ignored or exempt requests.
# TYPE pod_security_evaluations_total counter
pod_security_evaluations_total{decision="allow",mode="enforce",policy_level="baseline",policy_version="latest",request_operation="create",resource="pod",subresource=""} 2
pod_security_evaluations_total{decision="allow",mode="enforce",policy_level="privileged",policy_version="latest",request_operation="create",resource="pod",subresource=""} 0
pod_security_evaluations_total{decision="allow",mode="enforce",policy_level="privileged",policy_version="latest",request_operation="update",resource="pod",subresource=""} 0
pod_security_evaluations_total{decision="deny",mode="audit",policy_level="baseline",policy_version="latest",request_operation="create",resource="pod",subresource=""} 1
pod_security_evaluations_total{decision="deny",mode="enforce",policy_level="baseline",policy_version="latest",request_operation="create",resource="pod",subresource=""} 1
pod_security_evaluations_total{decision="deny",mode="warn",policy_level="restricted",policy_version="latest",request_operation="create",resource="controller",subresource=""} 2
pod_security_evaluations_total{decision="deny",mode="warn",policy_level="restricted",policy_version="latest",request_operation="create",resource="pod",subresource=""} 2

kind delete cluster

{"authorization.k8s.io/decision":"allow","authorization.k8s.io/reason":"","pod-security.kubernetes.io/audit":"allowPrivilegeEscalation != false (container \"busybox\" must set securityContext.allowPrivilegeEscalation=false), unrestricted capabilities (container \"busybox\" must set securityContext.capabilities.drop=[\"ALL\"]), runAsNonRoot != true (pod or container \"busybox\" must set securityContext.runAsNonRoot=true), seccompProfile (pod or container \"busybox\" must set securityContext.seccompProfile.type to \"RuntimeDefault\" or \"Localhost\")"}}

apiVersion: audit.k8s.io/v1
kind: Policy
rules:
- level: RequestResponse
  resources:
    - group: "" # core API group
      resources: ["pods", "pods/ephemeralcontainers", "podtemplates", "replicationcontrollers"]
    - group: "apps"
      resources: ["daemonsets", "deployments", "replicasets", "statefulsets"]
    - group: "batch"
      resources: ["cronjobs", "jobs"]
  verbs: ["create", "update"]
  omitStages:
    - "RequestReceived"
    - "ResponseStarted"
    - "Panic"

apiVersion: v1
kind: Pod
metadata:
  name: example
spec:
  containers:
  - name: nginx
    resources:
      requests:
        memory: "64Mi"
        cpu: "250m"
      limits:
        memory: "64Mi"
        cpu: "500m"

{
        "type": "<string>",
        "path": "<string>",
        "major": <int64>,
        "minor": <int64>,
        "fileMode": <uint32>,
        "uid": <uint32>,
        "gid": <uint32>
},

$ ls -l /dev/dri/
total 0
drwxr-xr-x. 2 root root         80 19.10. 10:21 by-path
crw-rw----+ 1 root video  226,   0 19.10. 10:42 card0
crw-rw-rw-. 1 root render 226, 128 19.10. 10:21 renderD128
$ grep -e video -e render /etc/group
video:x:39:
render:x:997:

$ ls -l /dev/dri/
total 0
drwxr-xr-x 2 root root         80 19.10. 17:36 by-path
crw-rw---- 1 root video  226,   0 19.10. 17:36 card0
crw-rw---- 1 root render 226, 128 19.10. 17:36 renderD128
$ grep -e video -e render /etc/group
video:x:44:
render:x:133:

{
        "type": "c",
        "path": "/dev/foo",
        "major": 123,
        "minor": 4,
        "fileMode": 438,
        "uid": <runAsUser>,
        "gid": <runAsGroup>
},

[plugins]
  [plugins."io.containerd.grpc.v1.cri"]
    device_ownership_from_security_context = true

[crio.runtime]
device_ownership_from_security_context = true

...
metadata:
  name: qat-dpdk
spec:
  securityContext:
    runAsUser: 1000
    runAsGroup: 2000
    fsGroup: 3000
  containers:
  - name: crypto-perf
    image: intel/crypto-perf:devel
    ...
    resources:
      requests:
        cpu: "3"
        memory: "128Mi"
        qat.intel.com/generic: '4'
        hugepages-2Mi: "128Mi"
      limits:
        cpu: "3"
        memory: "128Mi"
        qat.intel.com/generic: '4'
        hugepages-2Mi: "128Mi"
  ...

$ kubectl exec -it qat-dpdk -c crypto-perf -- id

uid=1000 gid=2000 groups=2000,3000

$ kubectl exec -it qat-dpdk -c crypto-perf -- ls -la /dev/vfio
total 0
drwxr-xr-x 2 root root      140 Sep  7 10:55 .
drwxr-xr-x 7 root root      380 Sep  7 10:55 ..
crw------- 1 1000 2000 241,   0 Sep  7 10:55 58
crw------- 1 1000 2000 241,   2 Sep  7 10:55 60
crw------- 1 1000 2000 241,  10 Sep  7 10:55 68
crw------- 1 1000 2000 241,  11 Sep  7 10:55 69
crw-rw-rw- 1 1000 2000  10, 196 Sep  7 10:55 vfio

$ kubectl exec -it qat-dpdk -c crypto-perf -- ls -la /dev/hugepages/

total 0
drwxrwsr-x 2 root 3000   0 Sep  7 10:55 .
drwxr-xr-x 7 root root 380 Sep  7 10:55 ..

apiVersion: v1
kind: Service
metadata:
  name: kpng-example
  labels:
    service.kubernetes.io/service-proxy-name: kpng-example
spec:
  clusterIP: None
  ipFamilyPolicy: RequireDualStack
  externalIPs:
  - 10.0.0.55
  - 1000::55
  selector:
    app: kpng-alpine
  ports:
  - port: 6000

kpng kube --service-proxy-name=kpng-example to-api

$ kubectl apply -f kpng-example.yaml
$ kpng-json | jq     # (this is the backend)
{
  "Service": {
    "Namespace": "default",
    "Name": "kpng-example",
    "Type": "ClusterIP",
    "IPs": {
      "ClusterIPs": {},
      "ExternalIPs": {
        "V4": [
          "10.0.0.55"
        ],
        "V6": [
          "1000::55"
        ]
      },
      "Headless": true
    },
    "Ports": [
      {
        "Protocol": 1,
        "Port": 6000,
        "TargetPort": 6000
      }
    ]
  },
  "Endpoints": [
    {
      "IPs": {
        "V6": [
          "1100::202"
        ]
      },
      "Local": true
    },
    {
      "IPs": {
        "V4": [
          "11.0.2.2"
        ]
      },
      "Local": true
    },
    {
      "IPs": {
        "V4": [
          "11.0.1.2"
        ]
      }
    },
    {
      "IPs": {
        "V6": [
          "1100::102"
        ]
      }
    }
  ]
}

package main
import (
        "os"
        "encoding/json"
        "sigs.k8s.io/kpng/client"
)
func main() {
        client.Run(jsonPrint)
}
func jsonPrint(items []*client.ServiceEndpoints) {
        enc := json.NewEncoder(os.Stdout)
        for _, item := range items {
                _ = enc.Encode(item)
        }
}

ip6tables -t nat -A PREROUTING -d 1000::55/128 -j DNAT --to-destination 1100::202

xip=$(cat /tmp/out | jq -r .Service.IPs.ExternalIPs.V6[0])
podip=$(cat /tmp/out | jq -r '.Endpoints[]|select(.Local == true)|select(.IPs.V6 != null)|.IPs.V6[0]')
ip6tables -t nat -A PREROUTING -d $xip/128 -j DNAT --to-destination $podip

CALLOUT=jq kpng-callout

---
apiVersion: cluster.x-k8s.io/v1beta1
kind: ClusterClass
metadata:
  name: my-amazing-cluster-class
spec:
  controlPlane:
    ref:
      apiVersion: controlplane.cluster.x-k8s.io/v1beta1
      kind: KubeadmControlPlaneTemplate
      name: high-availability-control-plane
    machineInfrastructure:
      ref:
        apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
        kind: DockerMachineTemplate
        name: control-plane-machine
  workers:
    machineDeployments:
      - class: type1-workers
        template:
          bootstrap:
            ref:
              apiVersion: bootstrap.cluster.x-k8s.io/v1beta1
              kind: KubeadmConfigTemplate
              name: type1-bootstrap
          infrastructure:
            ref:
              apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
              kind: DockerMachineTemplate
              name: type1-machine
      - class: type2-workers
        template:
          bootstrap:
            ref:
              apiVersion: bootstrap.cluster.x-k8s.io/v1beta1
              kind: KubeadmConfigTemplate
              name: type2-bootstrap
          infrastructure:
            ref:
              kind: DockerMachineTemplate
              apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
              name: type2-machine
  infrastructure:
    ref:
      apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
      kind: DockerClusterTemplate
      name: cluster-infrastructure

---
apiVersion: cluster.x-k8s.io/v1beta1
 kind: Cluster
 metadata:
   name: my-amazing-cluster
   namespace: bar
 spec:
   topology: # define a managed topology
     class: my-amazing-cluster-class # use the ClusterClass mentioned earlier
     version: v1.21.2
     controlPlane:
       replicas: 3
     workers:
       machineDeployments:
       - class: type1-workers
         name: big-pool-of-machines
         replicas: 5
       - class: type2-workers
         name: small-pool-of-machines
         replicas: 1

kubectl -n <namespace> get pvc <pvc-name> -o jsonpath='{.spec.volumeName}'

pvc-3096b3ba-38b6-4fd1-a42f-ec99176ed0d90

gcloud compute disks snapshot <cloud-disk-id> --project=<gcp-project-id> --snapshot-names=<set-new-snapshot-name> --zone=<availability-zone> --storage-location=<region>

aws ec2 create-snapshot --volume-id '<volume-id>' --description '<set-new-snapshot-name>' --tag-specifications 'ResourceType=snapshot'

"SnapshotId": "snap-09ed24a70bc19bbe4"

gcloud compute snapshots --project=<gcp-project-id> describe <new-snapshot-name> | grep id:

id: 6645363163809389170

---
apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshotContent
metadata:
 name: postgresql-orders-db-sandbox01
 namespace: sandbox01
spec:
 deletionPolicy: Retain
 driver: pd.csi.storage.gke.io
 source:
   snapshotHandle: 'gcp/projects/staging-eu-castai-vt5hy2/global/snapshots/6645363163809389170'
 volumeSnapshotRef:
   kind: VolumeSnapshot
   name: postgresql-orders-db-snap
   namespace: sandbox01
---
apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshot
metadata:
 name: postgresql-orders-db-snap
 namespace: sandbox01
spec:
 source:
   volumeSnapshotContentName: postgresql-orders-db-sandbox01

  driver: ebs.csi.aws.com
  source:
    snapshotHandle: "snap-07ff83d328c981c98"

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
 name: postgres-pv-claim
 namespace: sandbox01
spec:
 dataSource:
   kind: VolumeSnapshot
   name: postgresql-orders-db-snap
   apiGroup: snapshot.storage.k8s.io
 accessModes:
   - ReadWriteOnce
 resources:
   requests:
     storage: 21Gi

kubectl -n <namespace> get volumesnapshotContent,volumesnapshot,pvc,pod

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: shared-cache
spec:
  accessModes:
  - ReadWriteMany # Allow many nodes to access shared-cache simultaneously.
  resources:
    requests:
      storage: 1Gi

Events:
  Type     Reason            Age   From               Message
  ----     ------            ----  ----               -------
  Warning  FailedScheduling  1s    default-scheduler  0/1 nodes are available: 1 node has pod using PersistentVolumeClaim with the same name and ReadWriteOncePod access mode.

--feature-gates="...,ReadWriteOncePod=true"

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: single-writer-only
spec:
  accessModes:
  - ReadWriteOncePod # Allow only a single pod to access single-writer-only.
  resources:
    requests:
      storage: 1Gi

kubectl patch pv cat-pictures-pv -p '{"spec":{"persistentVolumeReclaimPolicy":"Retain"}}'

kubectl scale --replicas=0 deployment cat-pictures-writer
kubectl delete pvc cat-pictures-pvc
kubectl patch pv cat-pictures-pv -p '{"spec":{"claimRef":{"uid":""}}}'

kubectl patch pv cat-pictures-pv -p '{"spec":{"accessModes":["ReadWriteOncePod"]}}'

# IMPORTANT: Make sure to edit your PVC in cat-pictures-pvc.yaml before applying. You need to:
# - Set ReadWriteOncePod as the only access mode
# - Set spec.volumeName to "cat-pictures-pv"

kubectl apply -f cat-pictures-pvc.yaml
kubectl apply -f cat-pictures-writer-deployment.yaml

kubectl patch pv cat-pictures-pv -p '{"spec":{"persistentVolumeReclaimPolicy":"Delete"}}'

diff --git a/pkg/gce-pd-csi-driver/utils.go b/pkg/gce-pd-csi-driver/utils.go
index 281242c..b6c5229 100644
--- a/pkg/gce-pd-csi-driver/utils.go
+++ b/pkg/gce-pd-csi-driver/utils.go
@@ -123,6 +123,8 @@ func validateAccessMode(am *csi.VolumeCapability_AccessMode) error {
        case csi.VolumeCapability_AccessMode_SINGLE_NODE_READER_ONLY:
        case csi.VolumeCapability_AccessMode_MULTI_NODE_READER_ONLY:
        case csi.VolumeCapability_AccessMode_MULTI_NODE_MULTI_WRITER:
+       case csi.VolumeCapability_AccessMode_SINGLE_NODE_SINGLE_WRITER:
+       case csi.VolumeCapability_AccessMode_SINGLE_NODE_MULTI_WRITER:
        default:
                return fmt.Errorf("%v access mode is not supported for for PD", am.GetMode())
        }

diff --git a/pkg/gce-pd-csi-driver/gce-pd-driver.go b/pkg/gce-pd-csi-driver/gce-pd-driver.go
index 45903f3..0d7ea26 100644
--- a/pkg/gce-pd-csi-driver/gce-pd-driver.go
+++ b/pkg/gce-pd-csi-driver/gce-pd-driver.go
@@ -56,6 +56,8 @@ func (gceDriver *GCEDriver) SetupGCEDriver(name, vendorVersion string, extraVolu
                csi.VolumeCapability_AccessMode_SINGLE_NODE_WRITER,
                csi.VolumeCapability_AccessMode_MULTI_NODE_READER_ONLY,
                csi.VolumeCapability_AccessMode_MULTI_NODE_MULTI_WRITER,
+               csi.VolumeCapability_AccessMode_SINGLE_NODE_SINGLE_WRITER,
+               csi.VolumeCapability_AccessMode_SINGLE_NODE_MULTI_WRITER,
        }
        gceDriver.AddVolumeCapabilityAccessModes(vcam)
        csc := []csi.ControllerServiceCapability_RPC_Type{
@@ -67,12 +69,14 @@ func (gceDriver *GCEDriver) SetupGCEDriver(name, vendorVersion string, extraVolu
                csi.ControllerServiceCapability_RPC_EXPAND_VOLUME,
                csi.ControllerServiceCapability_RPC_LIST_VOLUMES,
                csi.ControllerServiceCapability_RPC_LIST_VOLUMES_PUBLISHED_NODES,
+               csi.ControllerServiceCapability_RPC_SINGLE_NODE_MULTI_WRITER,
        }
        gceDriver.AddControllerServiceCapabilities(csc)
        ns := []csi.NodeServiceCapability_RPC_Type{
                csi.NodeServiceCapability_RPC_STAGE_UNSTAGE_VOLUME,
                csi.NodeServiceCapability_RPC_EXPAND_VOLUME,
                csi.NodeServiceCapability_RPC_GET_VOLUME_STATS,
+               csi.NodeServiceCapability_RPC_SINGLE_NODE_MULTI_WRITER,
        }
        gceDriver.AddNodeServiceCapabilities(ns)

apiVersion: apiserver.config.k8s.io/v1alpha1
kind: TracingConfiguration
# 1% sampling rate
samplingRatePerMillion: 10000

kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/volume-data-source-validator/master/client/config/crd/populator.storage.k8s.io_volumepopulators.yaml
kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/volume-data-source-validator/master/deploy/kubernetes/rbac-data-source-validator.yaml
kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/volume-data-source-validator/master/deploy/kubernetes/setup-data-source-validator.yaml

kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/lib-volume-populator/master/example/hello-populator/crd.yaml
kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/lib-volume-populator/master/example/hello-populator/deploy.yaml

apiVersion: hello.k8s.io/v1alpha1
kind: Hello
metadata:
  name: example-hello
spec:
  fileName: example.txt
  fileContents: Hello, world!

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: example-pvc
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 10Mi
  dataSourceRef:
    apiGroup: hello.k8s.io
    kind: Hello
    name: example-hello
  volumeMode: Filesystem

apiVersion: batch/v1
kind: Job
metadata:
  name: example-job
spec:
  template:
    spec:
      containers:
        - name: example-container
          image: busybox:latest
          command:
            - cat
            - /mnt/example.txt
          volumeMounts:
            - name: vol
              mountPath: /mnt
      restartPolicy: Never
      volumes:
        - name: vol
          persistentVolumeClaim:
            claimName: example-pvc

kubectl wait --for=condition=Complete job/example-job

kubectl logs job/example-job
Hello, world!

apiVersion: v1
kind: Pod
metadata:
  name: test-pod
spec:
  containers:
    - name: test-container
      image: nginx:1.21

CONTAINER_ID=$(sudo crictl ps -q --name=test-container)
sudo crictl inspect $CONTAINER_ID | jq .info.runtimeSpec.linux.seccomp

{
  "defaultAction": "SCMP_ACT_ERRNO",
  "architectures": ["SCMP_ARCH_X86_64", "SCMP_ARCH_X86", "SCMP_ARCH_X32"],
  "syscalls": [
    {
      "names": ["_llseek", "_newselect", "accept", …, "write", "writev"],
      "action": "SCMP_ACT_ALLOW"
    },
    …
  ]
}

apiVersion: v1
kind: Pod
metadata:
  name: test-pod
spec:
  containers:
    - name: test-container-nginx
      image: nginx:1.21
      securityContext:
        seccompProfile:
          type: Unconfined
    - name: test-container-redis
      image: redis:6.2

sudo crictl inspect $(sudo crictl ps -q --name=test-container-nginx) |
    jq '.info.runtimeSpec.linux.seccomp == null'
true

sudo crictl inspect $(sudo crictl ps -q --name=test-container-redis) |
    jq '.info.runtimeSpec.linux.seccomp != null'
true

sudo crictl inspectp (sudo crictl pods -q --name test-pod) |
    jq '.info.runtimeSpec.linux.seccomp != null'
true

memorySwap:
  swapBehavior: LimitedSwap

import (
         ...
         v1ac "k8s.io/client-go/applyconfigurations/autoscaling/v1"
)

hpaApplyConfig := v1ac.HorizontalPodAutoscaler(autoscalerName, ns).
         WithSpec(v1ac.HorizontalPodAutoscalerSpec().
                  WithMinReplicas(0)
         )

return hpav1client.Apply(ctx, hpaApplyConfig, metav1.ApplyOptions{FieldManager: "mycontroller", Force: true})

apiVersion: autoscaling/v1
kind: HorizontalPodAutoscaler
metadata:
    name: myHPA
    namespace: myNamespace
spec:
    minReplicas: 0

hpa := v1.HorizontalPodAutoscaler{
         TypeMeta: metav1.TypeMeta{
                  APIVersion: "autoscaling/v1",
                  Kind:       "HorizontalPodAutoscaler",
         },
         ObjectMeta: ObjectMeta{
                  Namespace: ns,
                  Name:      autoscalerName,
         },
         Spec: v1.HorizontalPodAutoscalerSpec{
                  MinReplicas: pointer.Int32Ptr(0),
         },
}

kind: HorizontalPodAutoscaler
apiVersion: autoscaling/v1
metadata
  name: myHPA
  namespace: myNamespace
  creationTimestamp: null
spec:
  scaleTargetRef:
    kind: ""
    name: ""
  minReplicas: 0
  maxReplicas: 0

fieldMgr := "my-field-manager"
deploymentClient := clientset.AppsV1().Deployments("default")

// read, could also be read from a shared informer
deployment, err := deploymentClient.Get(ctx, "example-deployment", metav1.GetOptions{})
if err != nil {
  // handle error
}

// extract
deploymentApplyConfig, err := appsv1ac.ExtractDeployment(deployment, fieldMgr)
if err != nil {
  // handle error
}

// modify-in-place
deploymentApplyConfig.Spec.Template.Spec.WithContainers(corev1ac.Container().
	WithName("modify-slice").
	WithImage("nginx:1.14.2"),
)

// apply
applied, err := deploymentClient.Apply(ctx, deploymentApplyConfig, metav1.ApplyOptions{FieldManager: fieldMgr})

kubectl convert -f ./legacy-ingress.yaml --output-version networking.k8s.io/v1

kubectl label my-pod my-label-key=my-label-value

$ operator-sdk version
operator-sdk version: "v1.4.2", commit: "4b083393be65589358b3e0416573df04f4ae8d9b", kubernetes version: "v1.19.4", go version: "go1.15.8", GOOS: "darwin", GOARCH: "amd64"

mkdir label-operator && cd label-operator

# Feel free to change the domain and repo values.
operator-sdk init --domain=padok.fr --repo=github.com/busser/label-operator

operator-sdk create api --group=core --version=v1 --kind=Pod --controller=true --resource=false

func (r *PodReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
    _ = r.Log.WithValues("pod", req.NamespacedName)

    // your logic here

    return ctrl.Result{}, nil
}

func (r *PodReconciler) SetupWithManager(mgr ctrl.Manager) error {
    return ctrl.NewControllerManagedBy(mgr).
        // Uncomment the following line adding a pointer to an instance of the controlled resource as an argument
        // For().
        Complete(r)
}

package controllers

import (
    // other imports...
    corev1 "k8s.io/api/core/v1"
    // other imports...
)

func (r *PodReconciler) SetupWithManager(mgr ctrl.Manager) error {
    return ctrl.NewControllerManagedBy(mgr).
        For(&corev1.Pod{}).
        Complete(r)
}

// +kubebuilder:rbac:groups=core,resources=pods,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=core,resources=pods/status,verbs=get;update;patch
// +kubebuilder:rbac:groups=core,resources=pods/finalizers,verbs=update

// +kubebuilder:rbac:groups=core,resources=pods,verbs=get;list;watch;update;patch

const (
    addPodNameLabelAnnotation = "padok.fr/add-pod-name-label"
    podNameLabel              = "padok.fr/pod-name"
)

// Reconcile handles a reconciliation request for a Pod.
// If the Pod has the addPodNameLabelAnnotation annotation, then Reconcile
// will make sure the podNameLabel label is present with the correct value.
// If the annotation is absent, then Reconcile will make sure the label is too.
func (r *PodReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
    log := r.Log.WithValues("pod", req.NamespacedName)

    /*
        Step 0: Fetch the Pod from the Kubernetes API.
    */

    var pod corev1.Pod
    if err := r.Get(ctx, req.NamespacedName, &pod); err != nil {
        log.Error(err, "unable to fetch Pod")
        return ctrl.Result{}, err
    }

    return ctrl.Result{}, nil
}

package controllers

import (
    // other imports...
    apierrors "k8s.io/apimachinery/pkg/api/errors"
    // other imports...
)

    /*
        Step 0: Fetch the Pod from the Kubernetes API.
    */

    var pod corev1.Pod
    if err := r.Get(ctx, req.NamespacedName, &pod); err != nil {
        if apierrors.IsNotFound(err) {
            // we'll ignore not-found errors, since we can get them on deleted requests.
            return ctrl.Result{}, nil
        }
        log.Error(err, "unable to fetch Pod")
        return ctrl.Result{}, err
    }

    /*
        Step 1: Add or remove the label.
    */

    labelShouldBePresent := pod.Annotations[addPodNameLabelAnnotation] == "true"
    labelIsPresent := pod.Labels[podNameLabel] == pod.Name

    if labelShouldBePresent == labelIsPresent {
        // The desired state and actual state of the Pod are the same.
        // No further action is required by the operator at this moment.
        log.Info("no update required")
        return ctrl.Result{}, nil
    }

    if labelShouldBePresent {
        // If the label should be set but is not, set it.
        if pod.Labels == nil {
            pod.Labels = make(map[string]string)
        }
        pod.Labels[podNameLabel] = pod.Name
        log.Info("adding label")
    } else {
        // If the label should not be set but is, remove it.
        delete(pod.Labels, podNameLabel)
        log.Info("removing label")
    }

    /*
        Step 2: Update the Pod in the Kubernetes API.
    */

    if err := r.Update(ctx, &pod); err != nil {
        log.Error(err, "unable to update Pod")
        return ctrl.Result{}, err
    }

    /*
        Step 2: Update the Pod in the Kubernetes API.
    */

    if err := r.Update(ctx, &pod); err != nil {
        if apierrors.IsConflict(err) {
            // The Pod has been updated since we read it.
            // Requeue the Pod to try to reconciliate again.
            return ctrl.Result{Requeue: true}, nil
        }
        if apierrors.IsNotFound(err) {
            // The Pod has been deleted since we read it.
            // Requeue the Pod to try to reconciliate again.
            return ctrl.Result{Requeue: true}, nil
        }
        log.Error(err, "unable to update Pod")
        return ctrl.Result{}, err
    }

    return ctrl.Result{}, nil
}

make run

kubectl run --image=nginx my-nginx

INFO    controllers.Pod no update required  {"pod": "default/my-nginx"}
INFO    controllers.Pod no update required  {"pod": "default/my-nginx"}
INFO    controllers.Pod no update required  {"pod": "default/my-nginx"}
INFO    controllers.Pod no update required  {"pod": "default/my-nginx"}

$ kubectl get pod my-nginx --show-labels
NAME       READY   STATUS    RESTARTS   AGE   LABELS
my-nginx   1/1     Running   0          11m   run=my-nginx

kubectl annotate pod my-nginx padok.fr/add-pod-name-label=true

INFO    controllers.Pod adding label    {"pod": "default/my-nginx"}

$ kubectl get pod my-nginx --show-labels
NAME       READY   STATUS    RESTARTS   AGE   LABELS
my-nginx   1/1     Running   0          13m   padok.fr/pod-name=my-nginx,run=my-nginx

kubectl create configmap mymap
configmap/mymap created

kubectl get configmap/mymap
NAME    DATA   AGE
mymap   0      12s

kubectl delete configmap/mymap
configmap "mymap" deleted

kubectl get configmap/mymap
Error from server (NotFound): configmaps "mymap" not found

cat <<EOF | kubectl create -f -
apiVersion: v1
kind: ConfigMap
metadata:
  name: mymap
  finalizers:
  - kubernetes
EOF

kubectl delete configmap/mymap &
configmap "mymap" deleted
jobs
[1]+  Running kubectl delete configmap/mymap

kubectl get configmap/mymap -o yaml
apiVersion: v1
kind: ConfigMap
metadata:
  creationTimestamp: "2020-10-22T21:30:18Z"
  deletionGracePeriodSeconds: 0
  deletionTimestamp: "2020-10-22T21:30:34Z"
  finalizers:
  - kubernetes
  name: mymap
  namespace: default
  resourceVersion: "311456"
  selfLink: /api/v1/namespaces/default/configmaps/mymap
  uid: 93a37fed-23e3-45e8-b6ee-b2521db81638

kubectl patch configmap/mymap \
    --type json \
    --patch='[ { "op": "remove", "path": "/metadata/finalizers" } ]'
configmap/mymap patched
[1]+  Done  kubectl delete configmap/mymap

kubectl get configmap/mymap -o yaml
Error from server (NotFound): configmaps "mymap" not found

cat <<EOF | kubectl create -f -
apiVersion: v1
kind: ConfigMap
metadata:
  name: mymap-parent
EOF
CM_UID=$(kubectl get configmap mymap-parent -o jsonpath="{.metadata.uid}")

cat <<EOF | kubectl create -f -
apiVersion: v1
kind: ConfigMap
metadata:
  name: mymap-child
  ownerReferences:
  - apiVersion: v1
    kind: ConfigMap
    name: mymap-parent
    uid: $CM_UID
EOF

kubectl get configmap
NAME           DATA   AGE
mymap-child    0      12m4s
mymap-parent   0      12m4s

kubectl delete configmap/mymap-child
configmap "mymap-child" deleted

kubectl get configmap
NAME           DATA   AGE
mymap-parent   0      12m10s

kubectl get configmap
NAME           DATA   AGE
mymap-child    0      10m2s
mymap-parent   0      10m2s

kubectl delete configmap/mymap-parent
configmap "mymap-parent" deleted

kubectl get configmap
No resources found in default namespace.

kubectl get configmap
NAME           DATA   AGE
mymap-child    0      13m8s
mymap-parent   0      13m8s

kubectl delete --cascade=orphan configmap/mymap-parent
configmap "mymap-parent" deleted

kubectl get configmap
NAME          DATA   AGE
mymap-child   0      13m21s

kubectl proxy --port=8080 &
Starting to serve on 127.0.0.1:8080

curl -X DELETE \
  localhost:8080/api/v1/namespaces/default/configmaps/mymap-parent \
  -d '{ "kind":"DeleteOptions", "apiVersion":"v1", "propagationPolicy":"Background" }' \
  -H "Content-Type: application/json"
{
  "kind": "Status",
  "apiVersion": "v1",
  "metadata": {},
  "status": "Success",
  "details": { ... }
}

cat <<EOF | curl -X PUT \
  localhost:8080/api/v1/namespaces/test/finalize \
  -H "Content-Type: application/json" \
  --data-binary @-
{
  "kind": "Namespace",
  "apiVersion": "v1",
  "metadata": {
    "name": "test"
  },
  "spec": {
    "finalizers": null
  }
}
EOF

var metricDefinition = kubemetrics.CounterOpts{
    Name: "some_metric",
    Help: "some description",
    StabilityLevel: kubemetrics.STABLE,
}

kind: HTTPRoute
apiVersion: networking.x-k8s.io/v1alpha1
metadata:
  name: foo-route
  namespace: foo
  labels:
    gateway: external-https-prod
spec:
  hostnames:
  - "foo.example.com"
  rules:
  - matches:
    - path:
        type: Prefix
        value: /login
    forwardTo:
    - serviceName: foo-auth
      port: 8080
  - matches:
    - path:
        type: Prefix
        value: /home
    forwardTo:
    - serviceName: foo-home
      port: 8080
  - matches:
    - path:
        type: Prefix
        value: /
    forwardTo:
    - serviceName: foo-404
      port: 8080

kind: HTTPRoute
apiVersion: networking.x-k8s.io/v1alpha1
metadata:
  name: bar-route
  namespace: bar
  labels:
    gateway: external-https-prod
spec:
  hostnames:
  - "bar.example.com"
  rules:
  - forwardTo:
    - serviceName: bar-v1
      port: 8080
      weight: 90
    - serviceName: bar-v2
      port: 8080
      weight: 10
  - matches:
    - headers:
        values:
          env: canary
    forwardTo:
    - serviceName: bar-v2
      port: 8080

kind: Gateway
apiVersion: networking.x-k8s.io/v1alpha1
metadata:
  name: prod-web
spec:
  gatewayClassName: acme-lb
  listeners:  
  - protocol: HTTPS
    port: 443
    routes:
      kind: HTTPRoute
      selector:
        matchLabels:
          gateway: external-https-prod
      namespaces:
        from: All
    tls:
      certificateRef:
        name: admin-controlled-cert

# Matches the required kind selector on the Gateway
kind: HTTPRoute
apiVersion: networking.x-k8s.io/v1alpha1
metadata:
  name: foo-route
  namespace: foo-ns
  labels:

    # Matches the required label selector on the Gateway
    gateway: external-https-prod
...

kubelet-node ~ # systemd-inhibit --list
    Who: kubelet (UID 0/root, PID 1515/kubelet)
    What: shutdown
    Why: Kubelet needs time to handle node shutdown
    Mode: delay

1 inhibitors listed.

kubectl annotate service quote a8r.io/owner=”@sally”

Name:              quote
Namespace:         default
Labels:            <none>
Annotations:       a8r.io/owner: @sally
Selector:          app=quote
Type:              ClusterIP
IP:                10.109.142.131
Port:              http  80/TCP
TargetPort:        8080/TCP
Endpoints:         <none>
Session Affinity:  None
Events:            <none>

apiVersion: v1
kind: Service
metadata:
  name: quote
  annotations:
    a8r.io/owner: “@sally”
spec:
  ports:
  - name: http
    port: 80
    targetPort: 8080
  selector:
    app: quote

metadata:
  creationTimestamp: null
  name: allow-ingress-port-80
spec:
  ingress:
  - ports:
    - port: serve-80-tcp
  podSelector: {}

Nov  4 16:58:43.449: INFO: expected:

-   x/a x/b x/c y/a y/b y/c z/a z/b z/c
x/a .   .   .   .   .   .   .   .   .
x/b .   .   .   .   .   .   .   .   .
x/c .   .   .   .   .   .   .   .   .
y/a .   .   .   .   .   .   .   .   .
y/b .   .   .   .   .   .   .   .   .
y/c .   .   .   .   .   .   .   .   .
z/a .   .   .   .   .   .   .   .   .
z/b .   .   .   .   .   .   .   .   .
z/c .   .   .   .   .   .   .   .   .

Nov  4 16:58:43.449: INFO: observed:

-   x/a x/b x/c y/a y/b y/c z/a z/b z/c
x/a X   X   X   X   X   X   X   X   X
x/b X   X   X   X   X   X   X   X   X
x/c X   X   X   X   X   X   X   X   X
y/a .   .   .   .   .   .   .   .   .
y/b .   .   .   .   .   .   .   .   .
y/c .   .   .   .   .   .   .   .   .
z/a .   .   .   .   .   .   .   .   .
z/b .   .   .   .   .   .   .   .   .
z/c .   .   .   .   .   .   .   .   .

apiVersion: batch/v1
kind: Job
metadata:
  name: cyclonus
spec:
  template:
    spec:
      restartPolicy: Never
      containers:
        - command:
            - ./cyclonus
            - generate
            - --perturbation-wait-seconds=15
            - --server-protocol=tcp,udp
          name: cyclonus
          imagePullPolicy: IfNotPresent
          image: mfenwick100/cyclonus:latest
      serviceAccount: cyclonus

test cases to run by tag:
- target: 6
- peer-ipblock: 4
- udp: 16
- delete-pod: 1
- conflict: 16
- multi-port/protocol: 14
- ingress: 51
- all-pods: 14
- egress: 51
- all-namespaces: 10
- sctp: 10
- port: 56
- miscellaneous: 22
- direction: 100
- multi-peer: 0
- any-port-protocol: 2
- set-namespace-labels: 1
- upstream-e2e: 0
- allow-all: 6
- namespaces-by-label: 6
- deny-all: 10
- pathological: 6
- action: 6
- rule: 30
- policy-namespace: 4
- example: 0
- tcp: 16
- target-namespace: 3
- named-port: 24
- update-policy: 1
- any-peer: 2
- target-pod-selector: 3
- IP-block-with-except: 2
- pods-by-label: 6
- numbered-port: 28
- protocol: 42
- peer-pods: 20
- create-policy: 2
- policy-stack: 0
- any-port: 14
- delete-namespace: 1
- delete-policy: 1
- create-pod: 1
- IP-block-no-except: 2
- create-namespace: 1
- set-pod-labels: 1
testing 112 cases

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  creationTimestamp: null
  name: base
  namespace: x
spec:
  egress:
  - ports:
    - port: 81
    to:
    - namespaceSelector:
        matchExpressions:
        - key: ns
          operator: In
          values:
          - "y"
          - z
      podSelector:
        matchExpressions:
        - key: pod
          operator: In
          values:
          - a
          - b
  - ports:
    - port: 53
      protocol: UDP
  ingress:
  - from:
    - namespaceSelector:
        matchExpressions:
        - key: ns
          operator: In
          values:
          - x
          - "y"
      podSelector:
        matchExpressions:
        - key: pod
          operator: In
          values:
          - b
          - c
    ports:
    - port: 80
      protocol: TCP
  podSelector:
    matchLabels:
      pod: a
  policyTypes:
  - Ingress
  - Egress

0 wrong, 0 ignored, 81 correct
+--------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| TCP/80 | X/A | X/B | X/C | Y/A | Y/B | Y/C | Z/A | Z/B | Z/C |
| TCP/81 |     |     |     |     |     |     |     |     |     |
| UDP/80 |     |     |     |     |     |     |     |     |     |
| UDP/81 |     |     |     |     |     |     |     |     |     |
+--------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| x/a    | X   | X   | X   | X   | X   | X   | X   | X   | X   |
|        | X   | X   | X   | .   | .   | X   | .   | .   | X   |
|        | X   | X   | X   | X   | X   | X   | X   | X   | X   |
|        | X   | X   | X   | X   | X   | X   | X   | X   | X   |
+--------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| x/b    | .   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
+--------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| x/c    | .   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
+--------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| y/a    | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
+--------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| y/b    | .   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
+--------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| y/c    | .   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
+--------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| z/a    | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
+--------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| z/b    | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
+--------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| z/c    | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
|        | X   | .   | .   | .   | .   | .   | .   | .   | .   |
+--------+-----+-----+-----+-----+-----+-----+-----+-----+-----+

kubernetes.io/metadata.name: <name-of-namespace>

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: test-network-policy
  namespace: default
spec:
  podSelector:
    matchLabels:
      role: db
  policyTypes:
  - Ingress
  # Allow inbound traffic to Pods labelled role=db, in the namespace 'default'
  # provided that the source is a Pod in the namespace 'my-namespace'
  ingress:
  - from:
    - namespaceSelector:
        matchLabels:
          kubernetes.io/metadata.name: my-namespace

apiVersion: batch/v1
kind: Job
metadata:
  name: 'sample-job'
spec:
  completions: 3
  parallelism: 3
  completionMode: Indexed
  template:
    spec:
      restartPolicy: Never
      containers:
      - command:
        - 'bash'
        - '-c'
        - 'echo "My partition: ${JOB_COMPLETION_INDEX}"'
        image: 'docker.io/library/bash'
        name: 'sample-load'

apiVersion: batch/v1
kind: Job
metadata:
  name: my-job
spec:
  suspend: true
  parallelism: 2
  completions: 10
  template:
    spec:
      containers:
      - name: my-container
        image: busybox
        command: ["sleep", "5"]
      restartPolicy: Never

$ curl -sL http://127.0.01:8080/metrics


# HELP DCGM_FI_DEV_SM_CLOCK SM clock frequency (in MHz).
# TYPE DCGM_FI_DEV_SM_CLOCK gauge
# HELP DCGM_FI_DEV_MEM_CLOCK Memory clock frequency (in MHz).
# TYPE DCGM_FI_DEV_MEM_CLOCK gauge
# HELP DCGM_FI_DEV_MEMORY_TEMP Memory temperature (in C).
# TYPE DCGM_FI_DEV_MEMORY_TEMP gauge
...
DCGM_FI_DEV_SM_CLOCK{gpu="0", UUID="GPU-604ac76c-d9cf-fef3-62e9-d92044ab6e52",container="foo",namespace="bar",pod="baz"} 139
DCGM_FI_DEV_MEM_CLOCK{gpu="0", UUID="GPU-604ac76c-d9cf-fef3-62e9-d92044ab6e52",container="foo",namespace="bar",pod="baz"} 405
DCGM_FI_DEV_MEMORY_TEMP{gpu="0", UUID="GPU-604ac76c-d9cf-fef3-62e9-d92044ab6e52",container="foo",namespace="bar",pod="baz"} 9223372036854775794

service PodResourcesLister {
    rpc List(ListPodResourcesRequest) returns (ListPodResourcesResponse) {}
    rpc GetAllocatableResources(AllocatableResourcesRequest) returns (AllocatableResourcesResponse) {}

    // Kubernetes 1.21
    rpc Watch(WatchPodResourcesRequest) returns (stream WatchPodResourcesResponse) {}
}

func main() {
	ctx, cancel := context.WithTimeout(context.Background(), connectionTimeout)
	defer cancel()

	socket := "/var/lib/kubelet/pod-resources/kubelet.sock"
	conn, err := grpc.DialContext(ctx, socket, grpc.WithInsecure(), grpc.WithBlock(),
		grpc.WithDialer(func(addr string, timeout time.Duration) (net.Conn, error) {
			return net.DialTimeout("unix", addr, timeout)
		}),
	)

	if err != nil {
		panic(err)
	}

    client := podresourcesapi.NewPodResourcesListerClient(conn)
    resp, err := client.List(ctx, &podresourcesapi.ListPodResourcesRequest{})
	if err != nil {
		panic(err)
	}
	net.Printf("%+v\n", resp)
}

securityContext:
  runAsUser: 1000
  runAsGroup: 3000
  fsGroup: 2000
  fsGroupChangePolicy: "OnRootMismatch"

apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshotClass
metadata:
  name: test-snapclass
driver: testdriver.csi.k8s.io
deletionPolicy: Delete
parameters:
  csi.storage.k8s.io/snapshotter-secret-name: mysecret
  csi.storage.k8s.io/snapshotter-secret-namespace: mysecretnamespace

apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshot
metadata:
  name: test-snapshot
  namespace: ns1
spec:
  volumeSnapshotClassName: test-snapclass
  source:
    persistentVolumeClaimName: test-pvc

apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshotContent
metadata:
  name: test-content
spec:
  deletionPolicy: Delete
  driver: testdriver.csi.k8s.io
  source:
    snapshotHandle: 7bdd0de3-xxx
  volumeSnapshotRef:
    name: test-snapshot
    namespace: default

apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshot
metadata:
  name: test-snapshot
spec:
  source:
        volumeSnapshotContentName: test-content

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc-restore
  namespace: demo-namespace
spec:
  storageClassName: test-storageclass
  dataSource:
    name: test-snapshot
    kind: VolumeSnapshot
    apiGroup: snapshot.storage.k8s.io
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

apiVersion: addons.x-k8s.io/v1alpha1
kind: Generic
metadata:
 	name: generic-sample
spec:
  objectKind:
  kind: NodeLocalDNS
  version: "v1alpha1"
  group: addons.x-k8s.io
channel: "../nodelocaldns/channels"

klog.InfoS("Pod status updated", "pod", klog.KObj(pod), "status", status)

I1025 00:15:15.525108       1 controller_utils.go:116] "Pod status updated" pod="kube-system/kubedns" status="ready"

{
  "ts": 1580306777.04728,
  "msg": "Pod status updated",
  "pod": {
    "name": "coredns",
    "namespace": "kube-system"
  },
  "status": "ready"
}

kubectl get --raw /metrics | prom2json | jq '
  .[] | select(.name=="apiserver_requested_deprecated_apis").metrics[].labels
'

{
  "group": "extensions",
  "removed_release": "1.22",
  "resource": "ingresses",
  "subresource": "",
  "version": "v1beta1"
}
{
  "group": "rbac.authorization.k8s.io",
  "removed_release": "1.22",
  "resource": "clusterroles",
  "subresource": "",
  "version": "v1beta1"
}

kubectl get --raw /metrics | prom2json | jq '
  # set $deprecated to a list of deprecated APIs
  [
    .[] | 
    select(.name=="apiserver_requested_deprecated_apis").metrics[].labels |
    {group,version,resource}
  ] as $deprecated 
  
  |
  
  # select apiserver_request_total metrics which are deprecated
  .[] | select(.name=="apiserver_request_total").metrics[] |
  select(.labels | {group,version,resource} as $key | $deprecated | index($key))
'

{
  "labels": {
    "code": "0",
    "component": "apiserver",
    "contentType": "application/vnd.kubernetes.protobuf;stream=watch",
    "dry_run": "",
    "group": "extensions",
    "resource": "ingresses",
    "scope": "cluster",
    "subresource": "",
    "verb": "WATCH",
    "version": "v1beta1"
  },
  "value": "21"
}
{
  "labels": {
    "code": "200",
    "component": "apiserver",
    "contentType": "application/vnd.kubernetes.protobuf",
    "dry_run": "",
    "group": "extensions",
    "resource": "ingresses",
    "scope": "cluster",
    "subresource": "",
    "verb": "LIST",
    "version": "v1beta1"
  },
  "value": "1"
}
{
  "labels": {
    "code": "200",
    "component": "apiserver",
    "contentType": "application/json",
    "dry_run": "",
    "group": "rbac.authorization.k8s.io",
    "resource": "clusterroles",
    "scope": "cluster",
    "subresource": "",
    "verb": "LIST",
    "version": "v1beta1"
  },
  "value": "1"
}

apiserver_requested_deprecated_apis{removed_release="1.22"} * on(group,version,resource,subresource)
group_right() apiserver_request_total

apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
  name: crontabs.example.com
spec:
  versions:
  - name: v1alpha1
    # This indicates the v1alpha1 version of the custom resource is deprecated.
    # API requests to this version receive a warning in the server response.
    deprecated: true
    # This overrides the default warning returned to clients making v1alpha1 API requests.
    deprecationWarning: "example.com/v1alpha1 CronTab is deprecated; use example.com/v1 CronTab (see http://example.com/v1alpha1-v1)"
    ...

  - name: v1beta1
    # This indicates the v1beta1 version of the custom resource is deprecated.
    # API requests to this version receive a warning in the server response.
    # A default warning message is returned for this version.
    deprecated: true
    ...

  - name: v1
    ...

{
  "apiVersion": "admission.k8s.io/v1",
  "kind": "AdmissionReview",
  "response": {
    "uid": "<value from request.uid>",
    "allowed": true,
    "warnings": [
      ".spec.memory: requests >1GB do not work on Fridays"
    ]
  }
}

import (
  "os"
  "k8s.io/client-go/rest"
  "k8s.io/kubectl/pkg/util/term"
  ...
)

func main() {
  rest.SetDefaultWarningHandler(
    rest.NewWarningWriter(os.Stderr, rest.WarningWriterOptions{
        // only print a given warning the first time we receive it
        Deduplicate: true,
        // highlight the output with color when the output supports it
        Color: term.AllowsColorOutput(os.Stderr),
      },
    ),
  )

  ...

import (
  "k8s.io/client-go/rest"
  "k8s.io/client-go/kubernetes"
)

func getClientWithoutWarnings(config *rest.Config) (kubernetes.Interface, error) {
  // copy to avoid mutating the passed-in config
  config = rest.CopyConfig(config)
  // set the warning handler for this client to ignore warnings
  config.WarningHandler = rest.NoWarnings{}
  // construct and return the client
  return kubernetes.NewForConfig(config)
}

git clone --branch=kubernetes-1-19-blog-post https://github.com/intel/pmem-csi.git
cd pmem-csi
export TEST_KUBERNETES_VERSION=1.19 TEST_FEATURE_GATES=CSIStorageCapacity=true,GenericEphemeralVolume=true TEST_PMEM_REGISTRY=intel
make start && echo && test/setup-deployment.sh

The test cluster is ready. Log in with [...]/pmem-csi/_work/pmem-govm/ssh.0, run
kubectl once logged in.  Alternatively, use kubectl directly with the
following env variable:
   KUBECONFIG=[...]/pmem-csi/_work/pmem-govm/kube.config

secret/pmem-csi-registry-secrets created
secret/pmem-csi-node-secrets created
serviceaccount/pmem-csi-controller created
...
To try out the pmem-csi driver ephemeral volumes:
   cat deploy/kubernetes-1.19/pmem-app-ephemeral.yaml |
   [...]/pmem-csi/_work/pmem-govm/ssh.0 kubectl create -f -

kubectl get \
        -o go-template='{{range .items}}{{if eq .storageClassName "pmem-csi-sc-late-binding"}}{{.metadata.name}} {{.nodeTopology.matchLabels}} {{.capacity}}
{{end}}{{end}}' \
        csistoragecapacities

csisc-2js6n map[pmem-csi.intel.com/node:pmem-csi-pmem-govm-worker2] 30716Mi
csisc-sqdnt map[pmem-csi.intel.com/node:pmem-csi-pmem-govm-worker1] 30716Mi
csisc-ws4bv map[pmem-csi.intel.com/node:pmem-csi-pmem-govm-worker3] 30716Mi

kubectl describe csistoragecapacities/csisc-6cw8j

Name:         csisc-sqdnt
Namespace:    default
Labels:       <none>
Annotations:  <none>
API Version:  storage.k8s.io/v1alpha1
Capacity:     30716Mi
Kind:         CSIStorageCapacity
Metadata:
  Creation Timestamp:  2020-08-11T15:41:03Z
  Generate Name:       csisc-
  Managed Fields:
    ...
  Owner References:
    API Version:     apps/v1
    Controller:      true
    Kind:            StatefulSet
    Name:            pmem-csi-controller
    UID:             590237f9-1eb4-4208-b37b-5f7eab4597d1
  Resource Version:  2994
  Self Link:         /apis/storage.k8s.io/v1alpha1/namespaces/default/csistoragecapacities/csisc-sqdnt
  UID:               da36215b-3b9d-404a-a4c7-3f1c3502ab13
Node Topology:
  Match Labels:
    pmem-csi.intel.com/node:  pmem-csi-pmem-govm-worker1
Storage Class Name:           pmem-csi-sc-late-binding
Events:                       <none>

# This example Pod definition demonstrates
# how to use generic ephemeral inline volumes
# with a PMEM-CSI storage class.
kind: Pod
apiVersion: v1
metadata:
  name: my-csi-app-inline-volume
spec:
  containers:
    - name: my-frontend
      image: intel/pmem-csi-driver-test:v0.7.14
      command: [ "sleep", "100000" ]
      volumeMounts:
      - mountPath: "/data"
        name: my-csi-volume
  volumes:
  - name: my-csi-volume
    ephemeral:
      volumeClaimTemplate:
        spec:
          accessModes:
          - ReadWriteOnce
          resources:
            requests:
              storage: 4Gi
          storageClassName: pmem-csi-sc-late-binding

kubectl get pods/my-csi-app-inline-volume -o wide

NAME                       READY   STATUS    RESTARTS   AGE     IP          NODE                         NOMINATED NODE   READINESS GATES
my-csi-app-inline-volume   1/1     Running   0          6m58s   10.36.0.2   pmem-csi-pmem-govm-worker1   <none>           <none>

kubectl get pvc/my-csi-app-inline-volume-my-csi-volume

NAME                                     STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS               AGE
my-csi-app-inline-volume-my-csi-volume   Bound    pvc-c11eb7ab-a4fa-46fe-b515-b366be908823   4Gi        RWO            pmem-csi-sc-late-binding   9m21s

kubectl get -o yaml pvc/my-csi-app-inline-volume-my-csi-volume

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  annotations:
    pv.kubernetes.io/bind-completed: "yes"
    pv.kubernetes.io/bound-by-controller: "yes"
    volume.beta.kubernetes.io/storage-provisioner: pmem-csi.intel.com
    volume.kubernetes.io/selected-node: pmem-csi-pmem-govm-worker1
  creationTimestamp: "2020-08-11T15:44:57Z"
  finalizers:
  - kubernetes.io/pvc-protection
  managedFields:
    ...
  name: my-csi-app-inline-volume-my-csi-volume
  namespace: default
  ownerReferences:
  - apiVersion: v1
    blockOwnerDeletion: true
    controller: true
    kind: Pod
    name: my-csi-app-inline-volume
    uid: 75c925bf-ca8e-441a-ac67-f190b7a2265f
...

csisc-2js6n map[pmem-csi.intel.com/node:pmem-csi-pmem-govm-worker2] 30716Mi
csisc-sqdnt map[pmem-csi.intel.com/node:pmem-csi-pmem-govm-worker1] 26620Mi
csisc-ws4bv map[pmem-csi.intel.com/node:pmem-csi-pmem-govm-worker3] 30716Mi

$ kubectl hns create svc1-team-a -n team-a

$ kubectl hns tree team-a
# Output:
team-a
└── svc1-team-a

$ kubectl describe rolebinding sres -n svc1-team-a
# Output:
Name:         sres
Labels:       hnc.x-k8s.io/inheritedFrom=team-a  # inserted by HNC
Annotations:  <none>
Role:
  Kind:  ClusterRole
  Name:  admin
Subjects: ...

kind: NetworkPolicy
apiVersion: networking.k8s.io/v1
metadata:
  name: allow-team-a
  namespace: team-a
spec:
  ingress:
  - from:
    - namespaceSelector:
        matchExpressions:
          - key: 'team-a.tree.hnc.x-k8s.io/depth' # Label created by HNC
            operator: Exists

kubectl create namespace kuberhealthy

kubectl config set-context --current --namespace=kuberhealthy 

helm repo add kuberhealthy https://comcast.github.io/kuberhealthy/helm-repos

helm install kuberhealthy kuberhealthy/kuberhealthy --set prometheus.enabled=true,prometheus.enableAlerting=true,prometheus.enableScraping=true,prometheus.serviceMonitor=true

helm install kuberhealthy kuberhealthy/kuberhealthy --set prometheus.enabled=true,prometheus.enableAlerting=true,prometheus.enableScraping=true

helm install kuberhealthy kuberhealthy/kuberhealthy

{
    "OK": true,
    "Errors": [],
    "CheckDetails": {
        "kuberhealthy/daemonset": {
            "OK": true,
            "Errors": [],
            "RunDuration": "22.512278967s",
            "Namespace": "kuberhealthy",
            "LastRun": "2020-04-06T23:20:31.7176964Z",
            "AuthoritativePod": "kuberhealthy-67bf8c4686-mbl2j",
            "uuid": "9abd3ec0-b82f-44f0-b8a7-fa6709f759cd"
        },
        "kuberhealthy/deployment": {
            "OK": true,
            "Errors": [],
            "RunDuration": "29.142295647s",
            "Namespace": "kuberhealthy",
            "LastRun": "2020-04-06T23:20:31.7176964Z",
            "AuthoritativePod": "kuberhealthy-67bf8c4686-mbl2j",
            "uuid": "5f0d2765-60c9-47e8-b2c9-8bc6e61727b2"
        },
        "kuberhealthy/dns-status-internal": {
            "OK": true,
            "Errors": [],
            "RunDuration": "2.43940936s",
            "Namespace": "kuberhealthy",
            "LastRun": "2020-04-06T23:20:44.6294547Z",
            "AuthoritativePod": "kuberhealthy-67bf8c4686-mbl2j",
            "uuid": "c85f95cb-87e2-4ff5-b513-e02b3d25973a"
        }
    },
    "CurrentMaster": "kuberhealthy-7cf79bdc86-m78qr"
}

prometheus.io/path: /metrics
prometheus.io/port: "80"
prometheus.io/scrape: "true"

- job_name: 'kuberhealthy'
  scrape_interval: 1m
  honor_labels: true
  metrics_path: /metrics
  kubernetes_sd_configs:
  - role: service
    namespaces:
      names:
        - kuberhealthy
  relabel_configs:
    - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape]
      action: keep
      regex: true

- job_name: kuberhealthy
  scrape_interval: 1m
  honor_labels: true
  metrics_path: /metrics
  static_configs:
    - targets:
      - kuberhealthy.kuberhealthy.svc.cluster.local:80

1 - (sum(count_over_time(kuberhealthy_check{check="kuberhealthy/deployment", status="0"}[30d])) OR vector(0)) / sum(count_over_time(kuberhealthy_check{check="kuberhealthy/deployment", status="1"}[30d]))

avg(kuberhealthy_check_duration_seconds{check="kuberhealthy/deployment"}) 

> export GITHUB_TOKEN=<MY-SECRET-TOKEN>
> ./main export
INFO | Getting GITHUB_TOKEN from environment variable
INFO | Dumping all issues
INFO | Pulling 90929 items
INFO | 1: Unit test coverage in Kubelet is lousy. (~30%)
INFO | 2: Better error messages if go isn't installed, or if gcloud is old.
INFO | 3: Need real cluster integration tests
INFO | 4: kubelet should know which containers it is managing
… [just wait 8 hours] …

> ./main export --update-api
INFO | Getting GITHUB_TOKEN from environment variable
INFO | Retrieving issues and PRs
INFO | Updating API
INFO | Got update timestamp: 2020-05-09T10:57:40.854151
INFO | 90786: Automated cherry pick of #90749: fix: azure disk dangling attach issue
INFO | 90674: Switch core master base images from debian to distroless
INFO | 90086: Handling error returned by request.Request.ParseForm()
INFO | 90544: configurable weight on the CPU and memory
INFO | 87746: Support compiling Kubelet w/o docker/docker
INFO | Using already extracted data from data/data.pickle
INFO | Loading pickle dataset
INFO | Parsed 34380 issues and 55832 pull requests (90212 items)
INFO | Updating data
INFO | Updating issue 90786 (updated at 2020-05-09T10:59:43Z)
INFO | Updating issue 90674 (updated at 2020-05-09T10:58:27Z)
INFO | Updating issue 90086 (updated at 2020-05-09T10:58:26Z)
INFO | Updating issue 90544 (updated at 2020-05-09T10:57:51Z)
INFO | Updating issue 87746 (updated at 2020-05-09T11:01:51Z)
INFO | Saving data

> ./main analyze --created
INFO | Using already extracted data from data/data.pickle
INFO | Loading pickle dataset
INFO | Parsed 34380 issues and 55832 pull requests (90212 items)

> ./main analyze --created-vs-closed

> ./main analyze --created-vs-closed --pull-requests

```release-note
I changed something extremely important and you should note that.
```

> ./main analyze --labels-by-group

> ./main analyze --labels-by-name --pull-requests

> ./main analyze --release-notes-stats

[
  …
  "hostname",
  "hostname address",
  "hostname and",
  "hostname as",
  "hostname being",
  "hostname bug",
  …
]

> ./main train
INFO | Using already extracted data from data/data.pickle
INFO | Loading pickle dataset
INFO | Parsed 34380 issues and 55832 pull requests (90212 items)
INFO | Training for label 'kind/bug'
INFO | 6980 items selected
INFO | Using 5584 training and 1395 testing texts
INFO | Number of classes: 2
INFO | Vocabulary len: 51772
INFO | Wrote features to file data/features.json
INFO | Using units: 1
INFO | Using activation function: sigmoid
INFO | Created model with 2 layers and 64 units
INFO | Compiling model
INFO | Starting training
Train on 5584 samples, validate on 1395 samples
Epoch 1/1000
5584/5584 - 3s - loss: 0.6895 - acc: 0.6789 - val_loss: 0.6856 - val_acc: 0.6860
Epoch 2/1000
5584/5584 - 2s - loss: 0.6822 - acc: 0.6827 - val_loss: 0.6782 - val_acc: 0.6860
Epoch 3/1000
…
Epoch 68/1000
5584/5584 - 2s - loss: 0.2587 - acc: 0.9257 - val_loss: 0.4847 - val_acc: 0.7728
INFO | Confusion matrix:
[[920  32]
 [291 152]]
INFO | Confusion matrix normalized:
[[0.966 0.034]
 [0.657 0.343]]
INFO | Saving model to file data/model.h5
INFO | Validation accuracy: 0.7727598547935486, loss: 0.48470408514836355

> ./main predict --test
INFO | Testing positive text:

        Fix concurrent map access panic
        Don't watch .mount cgroups to reduce number of inotify watches
        Fix NVML initialization race condition
        Fix brtfs disk metrics when using a subdirectory of a subvolume

INFO | Got prediction result: 0.9940581321716309
INFO | Matched expected positive prediction result
INFO | Testing negative text:

        action required
        1. Currently, if users were to explicitly specify CacheSize of 0 for
           KMS provider, they would end-up with a provider that caches up to
           1000 keys. This PR changes this behavior.
           Post this PR, when users supply 0 for CacheSize this will result in
           a validation error.
        2. CacheSize type was changed from int32 to *int32. This allows
           defaulting logic to differentiate between cases where users
           explicitly supplied 0 vs. not supplied any value.
        3. KMS Provider's endpoint (path to Unix socket) is now validated when
           the EncryptionConfiguration files is loaded. This used to be handled
           by the GRPCService.

INFO | Got prediction result: 0.1251964420080185
INFO | Matched expected negative prediction result

./main predict "My dudes, if you can understand SYN-ACK, you can understand consent"
INFO  | Got prediction result: 0.1251964420080185
ERROR | Result is lower than selected threshold 0.6

> curl https://kfserving.k8s.saschagrunert.de/v1/models/kubernetes-analysis:predict \
    -d '{"text": "my test text"}'
{"result": 0.1251964420080185}

# Edit the sudoers with the visudo command
sudo visudo

# Change the %sudo group to be password-less
%sudo   ALL=(ALL:ALL) NOPASSWD: ALL

# Press CTRL+X to exit
# Press Y to save
# Press Enter to confirm

# Update the repositories and list of the packages available
sudo apt update
# Update the system based on the packages installed > the "-y" will approve the change automatically
sudo apt upgrade -y

# Try to see if the docker cli and daemon are installed
docker version
# Same for kubectl
kubectl version

# Try to see if the docker cli and daemon are installed
docker version
# Same for kubectl
kubectl version

# Download the latest version of KinD
curl -Lo ./kind https://github.com/kubernetes-sigs/kind/releases/download/v0.7.0/kind-linux-amd64
# Make the binary executable
chmod +x ./kind
# Move the binary to your executable path
sudo mv ./kind /usr/local/bin/

# Check if the KUBECONFIG is not set
echo $KUBECONFIG
# Check if the .kube directory is created > if not, no need to create it
ls $HOME/.kube
# Create the cluster and give it a name (optional)
kind create cluster --name wslkind
# Check if the .kube has been created and populated with files
ls $HOME/.kube

# Check how many nodes it created
kubectl get nodes
# Check the services for the whole cluster
kubectl get all --all-namespaces

# Delete the existing cluster
kind delete cluster --name wslkind
# Create a config file for a 3 nodes cluster
cat << EOF > kind-3nodes.yaml
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
nodes:
  - role: control-plane
  - role: worker
  - role: worker
EOF
# Create a new cluster with the config file
kind create cluster --name wslkindmultinodes --config ./kind-3nodes.yaml
# Check how many nodes it created
kubectl get nodes

# Check the services for the whole cluster
kubectl get all --all-namespaces

# Install the Dashboard application into our cluster
kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-rc6/aio/deploy/recommended.yaml
# Check the resources it created based on the new namespace created
kubectl get all -n kubernetes-dashboard

# Start a kubectl proxy
kubectl proxy
# Enter the URL on your browser: http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/

# Create a new ServiceAccount
kubectl apply -f - <<EOF
apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin-user
  namespace: kubernetes-dashboard
EOF
# Create a ClusterRoleBinding for the ServiceAccount
kubectl apply -f - <<EOF
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: admin-user
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: admin-user
  namespace: kubernetes-dashboard
EOF

# Get the Token for the ServiceAccount
kubectl -n kubernetes-dashboard describe secret $(kubectl -n kubernetes-dashboard get secret | grep admin-user | awk '{print $1}')
# Copy the token and copy it into the Dashboard login and press "Sign in"

# Download the latest version of Minikube
curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
# Make the binary executable
chmod +x ./minikube
# Move the binary to your executable path
sudo mv ./minikube /usr/local/bin/

# Create a minikube one node cluster
minikube start --driver=none

# Install the conntrack package
sudo apt install -y conntrack

# Create a minikube one node cluster
minikube start --driver=none
# We got a permissions error > try again with sudo
sudo minikube start --driver=none

# Install the needed packages
sudo apt install -yqq daemonize dbus-user-session fontconfig

# Create the start-systemd-namespace script
sudo vi /usr/sbin/start-systemd-namespace
#!/bin/bash

SYSTEMD_PID=$(ps -ef | grep '/lib/systemd/systemd --system-unit=basic.target$' | grep -v unshare | awk '{print $2}')
if [ -z "$SYSTEMD_PID" ] || [ "$SYSTEMD_PID" != "1" ]; then
    export PRE_NAMESPACE_PATH="$PATH"
    (set -o posix; set) | \
        grep -v "^BASH" | \
        grep -v "^DIRSTACK=" | \
        grep -v "^EUID=" | \
        grep -v "^GROUPS=" | \
        grep -v "^HOME=" | \
        grep -v "^HOSTNAME=" | \
        grep -v "^HOSTTYPE=" | \
        grep -v "^IFS='.*"$'\n'"'" | \
        grep -v "^LANG=" | \
        grep -v "^LOGNAME=" | \
        grep -v "^MACHTYPE=" | \
        grep -v "^NAME=" | \
        grep -v "^OPTERR=" | \
        grep -v "^OPTIND=" | \
        grep -v "^OSTYPE=" | \
        grep -v "^PIPESTATUS=" | \
        grep -v "^POSIXLY_CORRECT=" | \
        grep -v "^PPID=" | \
        grep -v "^PS1=" | \
        grep -v "^PS4=" | \
        grep -v "^SHELL=" | \
        grep -v "^SHELLOPTS=" | \
        grep -v "^SHLVL=" | \
        grep -v "^SYSTEMD_PID=" | \
        grep -v "^UID=" | \
        grep -v "^USER=" | \
        grep -v "^_=" | \
        cat - > "$HOME/.systemd-env"
    echo "PATH='$PATH'" >> "$HOME/.systemd-env"
    exec sudo /usr/sbin/enter-systemd-namespace "$BASH_EXECUTION_STRING"
fi
if [ -n "$PRE_NAMESPACE_PATH" ]; then
    export PATH="$PRE_NAMESPACE_PATH"
fi

# Create the enter-systemd-namespace
sudo vi /usr/sbin/enter-systemd-namespace
#!/bin/bash

if [ "$UID" != 0 ]; then
    echo "You need to run $0 through sudo"
    exit 1
fi

SYSTEMD_PID="$(ps -ef | grep '/lib/systemd/systemd --system-unit=basic.target$' | grep -v unshare | awk '{print $2}')"
if [ -z "$SYSTEMD_PID" ]; then
    /usr/sbin/daemonize /usr/bin/unshare --fork --pid --mount-proc /lib/systemd/systemd --system-unit=basic.target
    while [ -z "$SYSTEMD_PID" ]; do
        SYSTEMD_PID="$(ps -ef | grep '/lib/systemd/systemd --system-unit=basic.target$' | grep -v unshare | awk '{print $2}')"
    done
fi

if [ -n "$SYSTEMD_PID" ] && [ "$SYSTEMD_PID" != "1" ]; then
    if [ -n "$1" ] && [ "$1" != "bash --login" ] && [ "$1" != "/bin/bash --login" ]; then
        exec /usr/bin/nsenter -t "$SYSTEMD_PID" -a \
            /usr/bin/sudo -H -u "$SUDO_USER" \
            /bin/bash -c 'set -a; source "$HOME/.systemd-env"; set +a; exec bash -c '"$(printf "%q" "$@")"
    else
        exec /usr/bin/nsenter -t "$SYSTEMD_PID" -a \
            /bin/login -p -f "$SUDO_USER" \
            $(/bin/cat "$HOME/.systemd-env" | grep -v "^PATH=")
    fi
    echo "Existential crisis"
fi

# Edit the permissions of the enter-systemd-namespace script
sudo chmod +x /usr/sbin/enter-systemd-namespace
# Edit the bash.bashrc file
sudo sed -i 2a"# Start or enter a PID namespace in WSL2\nsource /usr/sbin/start-systemd-namespace\n" /etc/bash.bashrc

# Check if the KUBECONFIG is not set
echo $KUBECONFIG
# Check if the .kube directory is created > if not, no need to create it
ls $HOME/.kube
# Check if the .minikube directory is created > if yes, delete it
ls $HOME/.minikube
# Create the cluster with sudo
sudo minikube start --driver=none

# Change the owner of the .kube and .minikube directories
sudo chown -R $USER $HOME/.kube $HOME/.minikube
# Check the access and if the cluster is running
kubectl cluster-info
# Check the resources created
kubectl get all --all-namespaces

# Enable the Dashboard service
sudo minikube dashboard
# Access the Dashboard from a browser on Windows side

# Get all the services from the dashboard namespace
kubectl get all --namespace kubernetes-dashboard

# Edit the Dashoard service
kubectl edit service/kubernetes-dashboard --namespace kubernetes-dashboard
# Go to the very end and remove the last 2 lines
status:
  loadBalancer: {}
# Change the type from ClusterIO to LoadBalancer
  type: LoadBalancer
# Save the file

# Get all the services from the dashboard namespace
kubectl get all --namespace kubernetes-dashboard
# Access the Dashboard from a browser on Windows side with the URL: localhost:<port exposed>

spec:
  topologySpreadConstraints:
  - maxSkew: <integer>
    topologyKey: <string>
    whenUnsatisfiable: <string>
    labelSelector: <object>

apiVersion: kubescheduler.config.k8s.io/v1alpha2
kind: KubeSchedulerConfiguration
profiles:
  pluginConfig:
  - name: PodTopologySpread
    args:
      defaultConstraints:
      - maxSkew: 1
        topologyKey: example.com/rack
        whenUnsatisfiable: ScheduleAnyway

curl -sL https://run.solo.io/gloo/install | sh
export PATH=$HOME/.gloo/bin:$PATH

➜ glooctl version
Client: {"version":"1.3.15"}
Server: version undefined, could not find any version of gloo running

glooctl install gateway

Creating namespace gloo-system... Done.
Starting Gloo installation...

Gloo was successfully installed!

➜ kubectl get pod -n gloo-system
NAME                             READY   STATUS    RESTARTS   AGE
discovery-58f8856bd7-4fftg       1/1     Running   0          13s
gateway-66f86bc8b4-n5crc         1/1     Running   0          13s
gateway-proxy-5ff99b8679-tbp65   1/1     Running   0          13s
gloo-66b8dc8868-z5c6r            1/1     Running   0          13s

apiVersion: apps/v1
kind: Deployment
metadata:
  name: echo-v1
spec:
  replicas: 1
  selector:
    matchLabels:
      app: echo
      version: v1
  template:
    metadata:
      labels:
        app: echo
        version: v1
    spec:
      containers:
        # Shout out to our friends at Hashi for this useful test server
        - image: hashicorp/http-echo
          args:
            - "-text=version:v1"
            - -listen=:8080
          imagePullPolicy: Always
          name: echo-v1
          ports:
            - containerPort: 8080

apiVersion: v1
kind: Service
metadata:
  name: echo
spec:
  ports:
    - port: 80
      targetPort: 8080
      protocol: TCP
  selector:
    app: echo

kubectl apply -f https://raw.githubusercontent.com/solo-io/gloo-ref-arch/blog-30-mar-20/platform/prog-delivery/two-phased-with-os-gloo/1-setup/echo.yaml

namespace/echo created
deployment.apps/echo-v1 created
service/echo created

➜ kubectl get all -n echo
NAME                           READY   STATUS    RESTARTS   AGE
pod/echo-v1-66dbfffb79-287s5   1/1     Running   0          6s

NAME           TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)   AGE
service/echo   ClusterIP   10.55.252.216   <none>        80/TCP    6s

NAME                      READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/echo-v1   1/1     1            1           7s

NAME                                 DESIRED   CURRENT   READY   AGE
replicaset.apps/echo-v1-66dbfffb79   1         1         1       7s

apiVersion: gloo.solo.io/v1
kind: Upstream
metadata:
  name: echo
  namespace: gloo-system
spec:
  kube:
    selector:
      app: echo
    serviceName: echo
    serviceNamespace: echo
    servicePort: 8080
    subsetSpec:
      selectors:
        - keys:
            - version

apiVersion: gateway.solo.io/v1
kind: VirtualService
metadata:
  name: echo
  namespace: gloo-system
spec:
  virtualHost:
    domains:
      - "*"
    routes:
      - matchers:
          - prefix: /
        routeAction:
          single:
            upstream:
              name: echo
              namespace: gloo-system

kubectl apply -f https://raw.githubusercontent.com/solo-io/gloo-ref-arch/blog-30-mar-20/platform/prog-delivery/two-phased-with-os-gloo/1-setup/upstream.yaml
kubectl apply -f https://raw.githubusercontent.com/solo-io/gloo-ref-arch/blog-30-mar-20/platform/prog-delivery/two-phased-with-os-gloo/1-setup/vs.yaml

➜ curl $(glooctl proxy url)/
version:v1

apiVersion: gateway.solo.io/v1
kind: VirtualService
metadata:
  name: echo
  namespace: gloo-system
spec:
  virtualHost:
    domains:
      - "*"
    routes:
      - matchers:
          - prefix: /
        routeAction:
          single:
            upstream:
              name: echo
              namespace: gloo-system
            subset:
              values:
                version: v1

kubectl apply -f https://raw.githubusercontent.com/solo-io/gloo-ref-arch/blog-30-mar-20/platform/prog-delivery/two-phased-with-os-gloo/2-initial-subset-routing-to-v2/vs-1.yaml

➜ curl $(glooctl proxy url)/
version:v1

apiVersion: apps/v1
kind: Deployment
metadata:
  name: echo-v2
spec:
  replicas: 1
  selector:
    matchLabels:
      app: echo
      version: v2
  template:
    metadata:
      labels:
        app: echo
        version: v2
    spec:
      containers:
        - image: hashicorp/http-echo
          args:
            - "-text=version:v2"
            - -listen=:8080
          imagePullPolicy: Always
          name: echo-v2
          ports:
            - containerPort: 8080

kubectl apply -f https://raw.githubusercontent.com/solo-io/gloo-ref-arch/blog-30-mar-20/platform/prog-delivery/two-phased-with-os-gloo/2-initial-subset-routing-to-v2/echo-v2.yaml

➜ kubectl get pod -n echo
NAME                       READY   STATUS    RESTARTS   AGE
echo-v1-66dbfffb79-2qw86   1/1     Running   0          5m25s
echo-v2-86584fbbdb-slp44   1/1     Running   0          93s

➜ curl $(glooctl proxy url)/
version:v1

apiVersion: gateway.solo.io/v1
kind: VirtualService
metadata:
  name: echo
  namespace: gloo-system
spec:
  virtualHost:
    domains:
      - "*"
    routes:
      - matchers:
          - headers:
              - name: stage
                value: canary
            prefix: /
        routeAction:
          single:
            upstream:
              name: echo
              namespace: gloo-system
            subset:
              values:
                version: v2
      - matchers:
          - prefix: /
        routeAction:
          single:
            upstream:
              name: echo
              namespace: gloo-system
            subset:
              values:
                version: v1

kubectl apply -f https://raw.githubusercontent.com/solo-io/gloo-ref-arch/blog-30-mar-20/platform/prog-delivery/two-phased-with-os-gloo/2-initial-subset-routing-to-v2/vs-2.yaml

➜ curl $(glooctl proxy url)/
version:v1

➜ curl $(glooctl proxy url)/ -H "stage: canary"
version:v2

apiVersion: gateway.solo.io/v1
kind: VirtualService
metadata:
  name: echo
  namespace: gloo-system
spec:
  virtualHost:
    domains:
      - "*"
    routes:
      # We'll keep our route from before if we want to continue testing with this header
      - matchers:
          - headers:
              - name: stage
                value: canary
            prefix: /
        routeAction:
          single:
            upstream:
              name: echo
              namespace: gloo-system
            subset:
              values:
                version: v2
      # Now we'll route the rest of the traffic to the upstream, load balanced across the two subsets.
      - matchers:
          - prefix: /
        routeAction:
          multi:
            destinations:
              - destination:
                  upstream:
                    name: echo
                    namespace: gloo-system
                  subset:
                    values:
                      version: v1
                weight: 100
              - destination:
                  upstream:
                    name: echo
                    namespace: gloo-system
                  subset:
                    values:
                      version: v2
                weight: 0

kubectl apply -f https://raw.githubusercontent.com/solo-io/gloo-ref-arch/blog-30-mar-20/platform/prog-delivery/two-phased-with-os-gloo/3-progressive-traffic-shift-to-v2/vs-1.yaml

➜ curl $(glooctl proxy url)/
version:v1

apiVersion: gateway.solo.io/v1
kind: VirtualService
metadata:
  name: echo
  namespace: gloo-system
spec:
  virtualHost:
    domains:
      - "*"
    routes:
      - matchers:
          - headers:
              - name: stage
                value: canary
            prefix: /
        routeAction:
          single:
            upstream:
              name: echo
              namespace: gloo-system
            subset:
              values:
                version: v2
      - matchers:
          - prefix: /
        routeAction:
          multi:
            destinations:
              - destination:
                  upstream:
                    name: echo
                    namespace: gloo-system
                  subset:
                    values:
                      version: v1
                # Update the weight so 50% of the traffic hits v1
                weight: 50
              - destination:
                  upstream:
                    name: echo
                    namespace: gloo-system
                  subset:
                    values:
                      version: v2
                # And 50% is routed to v2
                weight: 50

kubectl apply -f https://raw.githubusercontent.com/solo-io/gloo-ref-arch/blog-30-mar-20/platform/prog-delivery/two-phased-with-os-gloo/3-progressive-traffic-shift-to-v2/vs-2.yaml

➜ curl $(glooctl proxy url)/
version:v1
➜ curl $(glooctl proxy url)/
version:v2
➜ curl $(glooctl proxy url)/
version:v1

apiVersion: gateway.solo.io/v1
kind: VirtualService
metadata:
  name: echo
  namespace: gloo-system
spec:
  virtualHost:
    domains:
      - "*"
    routes:
      - matchers:
          - headers:
              - name: stage
                value: canary
            prefix: /
        routeAction:
          single:
            upstream:
              name: echo
              namespace: gloo-system
            subset:
              values:
                version: v2
      - matchers:
          - prefix: /
        routeAction:
          multi:
            destinations:
              - destination:
                  upstream:
                    name: echo
                    namespace: gloo-system
                  subset:
                    values:
                      version: v1
                # No traffic will be sent to v1 anymore
                weight: 0
              - destination:
                  upstream:
                    name: echo
                    namespace: gloo-system
                  subset:
                    values:
                      version: v2
                # Now all the traffic will be routed to v2
                weight: 100

kubectl apply -f https://raw.githubusercontent.com/solo-io/gloo-ref-arch/blog-30-mar-20/platform/prog-delivery/two-phased-with-os-gloo/3-progressive-traffic-shift-to-v2/vs-3.yaml

➜ curl $(glooctl proxy url)/
version:v2
➜ curl $(glooctl proxy url)/
version:v2
➜ curl $(glooctl proxy url)/
version:v2

apiVersion: gateway.solo.io/v1
kind: VirtualService
metadata:
  name: echo
  namespace: gloo-system
spec:
  virtualHost:
    domains:
      - "*"
    routes:
      - matchers:
          - prefix: /
        routeAction:
          single:
            upstream:
              name: echo
              namespace: gloo-system
            subset:
              values:
                version: v2

kubectl apply -f https://raw.githubusercontent.com/solo-io/gloo-ref-arch/blog-30-mar-20/platform/prog-delivery/two-phased-with-os-gloo/4-decommissioning-v1/vs.yaml

kubectl delete deploy -n echo echo-v1

➜ curl $(glooctl proxy url)/
version:v2

apiVersion: controlplane.cluster.x-k8s.io/v1alpha3
kind: KubeadmControlPlane
metadata:
  name: example
spec:
  infrastructureTemplate:
    apiVersion: infrastructure.cluster.x-k8s.io/v1alpha3
    kind: DockerMachineTemplate
    name: example
    namespace: default
  kubeadmConfigSpec:
    clusterConfiguration:
  replicas: 3
  version: 1.16.3

kubectl apply -f example-docker-control-plane.yaml

kubectl scale kubeadmcontrolplane example  --replicas=5

kubeadmcontrolplane.controlplane.cluster.x-k8s.io/example scaled

kubectl patch kubeadmcontrolplane example --type=json -p '[{"op": "replace", "path": "/spec/version", "value": "1.16.4"}]'

apiVersion: infrastructure.cluster.x-k8s.io/v1alpha3
kind: DockerCluster
metadata:
  name: example
spec:
  controlPlaneEndpoint:
    host: 172.17.0.4
    port: 6443
  failureDomains:
    domain-one:
      controlPlane: true
    domain-two:
      controlPlane: true
    domain-three:
      controlPlane: false

apiVersion: cluster.x-k8s.io/v1alpha3
kind: MachineHealthCheck
metadata:
  name: example-node-unhealthy-5m
spec:
  clusterName: example
  maxUnhealthy: 33%
  nodeStartupTimeout: 10m
  selector:
    matchLabels:
      nodepool: nodepool-0
  unhealthyConditions:
  - type: Ready
    status: Unknown
    timeout: 300s
  - type: Ready
    status: "False"
    timeout: 300s

apiVersion: "networking.k8s.io/v1beta1"
kind: "IngressClass"
metadata:
  name: "external-lb"
spec:
  controller: "example.com/ingress-controller"
  parameters:
    apiGroup: "k8s.example.com/v1alpha"
    kind: "IngressParameters"
    name: "external-lb"

apiVersion: "networking.k8s.io/v1beta1"
kind: "Ingress"
metadata:
  name: "example-ingress"
spec:
  ingressClassName: "external-lb"
  rules:
  - host: "*.example.com"
    http:
      paths:
      - path: "/example"
        pathType: "Prefix"
        backend:
          serviceName: "example-service"
          servicePort: 80

--topology-manager-policy=
    [none | best-effort | restricted | single-numa-node]

--feature-gates="...,TopologyManager=<true|false>"

spec:
   containers:
   - name: numa-aligned-container
     image: alpine
     resources:
         limits:
             cpu: 2
             memory: 200Mi
             gpu-vendor.com/gpu: 1
             nic-vendor.com/nic: 1

{cpu: {0, 1}, gpu: 0, nic: 0}
{cpu: {0, 2}, gpu: 0, nic: 0}
{cpu: {0, 3}, gpu: 0, nic: 0}
{cpu: {1, 2}, gpu: 0, nic: 0}
{cpu: {1, 3}, gpu: 0, nic: 0}
{cpu: {2, 3}, gpu: 0, nic: 0}

{cpu: {4, 5}, gpu: 1, nic: 1}
{cpu: {4, 6}, gpu: 1, nic: 1}
{cpu: {4, 7}, gpu: 1, nic: 1}
{cpu: {5, 6}, gpu: 1, nic: 1}
{cpu: {5, 7}, gpu: 1, nic: 1}
{cpu: {6, 7}, gpu: 1, nic: 1}

for container := range append(InitContainers, Containers...) {
    for provider := range HintProviders {
        hints += provider.GetTopologyHints(container)
    }

    bestHint := policy.Merge(hints)

    for provider := range HintProviders {
        provider.Allocate(container, bestHint)
    }
}

type TopologyHint struct {
    NUMANodeAffinity bitmask.BitMask
    Preferred bool
}

{00}, {01}, {10}, {11}

{01: True}, {10: True}, {11: False}

{0011: True}, {0111: False}, {1011: False}, {1111: False}

type HintProvider interface {
    GetTopologyHints(*v1.Pod, *v1.Container) map[string][]TopologyHint
    Allocate(*v1.Pod, *v1.Container) error
}

spec:
    containers:
    - name: numa-aligned-container0
      image: alpine
      resources:
          limits:
              cpu: 2
              memory: 200Mi
              gpu-vendor.com/gpu: 1
              nic-vendor.com/nic: 1

spec:
    containers:
    - name: numa-aligned-container1
      image: alpine
      resources:
          limits:
              cpu: 2
              memory: 200Mi
              gpu-vendor.com/gpu: 1
              nic-vendor.com/nic: 1

               cpu: {{01: True}, {10: True}, {11: False}}
gpu-vendor.com/gpu: {{01: True}, {10: True}}
nic-vendor.com/nic: {{01: True}, {10: True}}

{cpu: {0, 1}, gpu: 0, nic: 0}

               cpu: {{01: True}, {10: True}, {11: False}}
gpu-vendor.com/gpu: {{10: True}}
nic-vendor.com/nic: {{10: True}}

{cpu: {4, 5}, gpu: 1, nic: 1}

type Store interface {
    GetAffinity(podUID string, containerName string) TopologyHint
}

               cpu: {{01: True}, {10: True}, {11: False}}
gpu-vendor.com/gpu: {{01: True}, {10: True}}
nic-vendor.com/nic: {{01: True}, {10: True}}

$ kubectl label namespace default istio-injection=enabled
namespace/default labeled

$ kubectl create namespace kong
namespace/kong created

$ kubectl label namespace kong istio-injection=enabled
namespace/kong labeled

$ kubectl apply -f http://bit.ly/bookinfoapp
service/details created
serviceaccount/bookinfo-details created
deployment.apps/details-v1 created
service/ratings created
serviceaccount/bookinfo-ratings created
deployment.apps/ratings-v1 created
service/reviews created
serviceaccount/bookinfo-reviews created
deployment.apps/reviews-v1 created
deployment.apps/reviews-v2 created
deployment.apps/reviews-v3 created
service/productpage created
serviceaccount/bookinfo-productpage created
deployment.apps/productpage-v1 created

$ kubectl get services
NAME          TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)    AGE
details       ClusterIP   10.97.125.254    <none>        9080/TCP   29s
kubernetes    ClusterIP   10.96.0.1        <none>        443/TCP    29h
productpage   ClusterIP   10.97.62.68      <none>        9080/TCP   28s
ratings       ClusterIP   10.96.15.180     <none>        9080/TCP   28s
reviews       ClusterIP   10.104.207.136   <none>        9080/TCP   28s

$ kubectl get pods
NAME                              READY   STATUS    RESTARTS   AGE
details-v1-c5b5f496d-9wm29        2/2     Running   0          101s
productpage-v1-7d6cfb7dfd-5mc96   2/2     Running   0          100s
ratings-v1-f745cf57b-hmkwf        2/2     Running   0          101s
reviews-v1-85c474d9b8-kqcpt       2/2     Running   0          101s
reviews-v2-ccffdd984-9jnsj        2/2     Running   0          101s
reviews-v3-98dc67b68-nzw97        2/2     Running   0          101s

$ kubectl annotate service productpage ingress.kubernetes.io/service-upstream=true
service/productpage annotated

$ kubectl exec -it $(kubectl get pod -l app=ratings -o jsonpath='{.items[0].metadata.name}') -c ratings -- curl productpage:9080/productpage | grep -o "<title>.*</title>"
<title>Simple Bookstore App</title>

$ kubectl apply -f https://bit.ly/k4k8s
namespace/kong configured
customresourcedefinition.apiextensions.k8s.io/kongconsumers.configuration.konghq.com created
customresourcedefinition.apiextensions.k8s.io/kongcredentials.configuration.konghq.com created
customresourcedefinition.apiextensions.k8s.io/kongingresses.configuration.konghq.com created
customresourcedefinition.apiextensions.k8s.io/kongplugins.configuration.konghq.com created
serviceaccount/kong-serviceaccount created
clusterrole.rbac.authorization.k8s.io/kong-ingress-clusterrole created
clusterrolebinding.rbac.authorization.k8s.io/kong-ingress-clusterrole-nisa-binding created
configmap/kong-server-blocks created
service/kong-proxy created
service/kong-validation-webhook created
deployment.apps/ingress-kong created

$ kubectl get pods -n kong
NAME                               READY   STATUS    RESTARTS   AGE
pod/ingress-kong-8b44c9856-9s42v   3/3     Running   0          2m26s

$ export PROXY_URL="$(minikube service -n kong kong-proxy --url | head -1)"
$ echo $PROXY_URL
http://192.168.99.100:32728

$ echo "
apiVersion: configuration.konghq.com/v1
kind: KongIngress
metadata:
    name: do-not-preserve-host
route:
  preserve_host: false
upstream:
  host_header: productpage.default.svc
" | kubectl apply -f -
kongingress.configuration.konghq.com/do-not-preserve-host created

$ kubectl annotate svc productpage Ingress.kubernetes.io/service-upstream="true"
service/productpage annotated

$ echo "
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: productpage
  annotations:
    configuration.konghq.com: do-not-preserve-host
spec:
  rules:
  - http:
      paths:
      - path: /
        backend:
          serviceName: productpage
          servicePort: 9080
" | kubectl apply -f -
ingress.extensions/productpage created

$ curl $PROXY_URL/productpage

echo "192.168.1.4 master1" >> /etc/hosts

hostnamectl set-hostname master1

# Install Docker CE
## Set up the repository
### Install required packages.

yum install yum-utils device-mapper-persistent-data lvm2

### Add Docker repository.

yum-config-manager \
  --add-repo \
  https://download.docker.com/linux/centos/docker-ce.repo

## Install Docker CE.

yum update && yum install docker-ce-18.06.2.ce

## Create /etc/docker directory.

mkdir /etc/docker

# Configure the Docker daemon

cat > /etc/docker/daemon.json <<EOF
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2",
  "storage-opts": [
    "overlay2.override_kernel_check=true"
  ]
}
EOF

mkdir -p /etc/systemd/system/docker.service.d

# Restart Docker
systemctl daemon-reload
systemctl restart docker
systemctl enable docker

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF

# Set SELinux in permissive mode (effectively disabling it)
# Caveat: In a production environment you may not want to disable SELinux, please refer to Kubernetes documents about SELinux
setenforce 0
sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config

yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes

systemctl enable --now kubelet

cat <<EOF >  /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system

# check if br_netfilter module is loaded
lsmod | grep br_netfilter

# if not, load it explicitly with 
modprobe br_netfilter

apiVersion: kubeadm.k8s.io/v1beta1
kind: InitConfiguration
nodeRegistration:
  kubeletExtraArgs:
    cloud-provider: "external"
---
apiVersion: kubeadm.k8s.io/v1beta2
kind: ClusterConfiguration
kubernetesVersion: "v1.15.1"
apiServer:
  extraArgs:
    enable-admission-plugins: NodeRestriction
    runtime-config: "storage.k8s.io/v1=true"
controllerManager:
  extraArgs:
    external-cloud-volume-plugin: openstack
  extraVolumes:
  - name: "cloud-config"
    hostPath: "/etc/kubernetes/cloud-config"
    mountPath: "/etc/kubernetes/cloud-config"
    readOnly: true
    pathType: File
networking:
  serviceSubnet: "10.96.0.0/12"
  podSubnet: "10.224.0.0/16"
  dnsDomain: "cluster.local"

[Global]
region=RegionOne
username=username
password=password
auth-url=https://openstack.cloud:5000/v3
tenant-id=14ba698c0aec4fd6b7dc8c310f664009
domain-id=default
ca-file=/etc/kubernetes/ca.pem

[LoadBalancer]
subnet-id=b4a9a292-ea48-4125-9fb2-8be2628cb7a1
floating-network-id=bc8a590a-5d65-4525-98f3-f7ef29c727d5

[BlockStorage]
bs-version=v2

[Networking]
public-network-name=public
ipv6-support-disabled=false

kubeadm init --config=kubeadm-config.yml

  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config

# kubectl describe no master1
Name:               master1
Roles:              master
......
Taints:             node-role.kubernetes.io/master:NoSchedule
                    node.cloudprovider.kubernetes.io/uninitialized=true:NoSchedule
                    node.kubernetes.io/not-ready:NoSchedule
......

kubectl create secret -n kube-system generic cloud-config --from-literal=cloud.conf="$(cat /etc/kubernetes/cloud-config)" --dry-run -o yaml > cloud-config-secret.yaml
kubectl apply -f cloud-config-secret.yaml 

kubectl apply -f https://github.com/kubernetes/cloud-provider-openstack/raw/release-1.15/cluster/addons/rbac/cloud-controller-manager-roles.yaml
kubectl apply -f https://github.com/kubernetes/cloud-provider-openstack/raw/release-1.15/cluster/addons/rbac/cloud-controller-manager-role-bindings.yaml

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: cloud-controller-manager
  namespace: kube-system
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: openstack-cloud-controller-manager
  namespace: kube-system
  labels:
    k8s-app: openstack-cloud-controller-manager
spec:
  selector:
    matchLabels:
      k8s-app: openstack-cloud-controller-manager
  updateStrategy:
    type: RollingUpdate
  template:
    metadata:
      labels:
        k8s-app: openstack-cloud-controller-manager
    spec:
      nodeSelector:
        node-role.kubernetes.io/master: ""
      securityContext:
        runAsUser: 1001
      tolerations:
      - key: node.cloudprovider.kubernetes.io/uninitialized
        value: "true"
        effect: NoSchedule
      - key: node-role.kubernetes.io/master
        effect: NoSchedule
      - effect: NoSchedule
        key: node.kubernetes.io/not-ready
      serviceAccountName: cloud-controller-manager
      containers:
        - name: openstack-cloud-controller-manager
          image: docker.io/k8scloudprovider/openstack-cloud-controller-manager:v1.15.0
          args:
            - /bin/openstack-cloud-controller-manager
            - --v=1
            - --cloud-config=$(CLOUD_CONFIG)
            - --cloud-provider=openstack
            - --use-service-account-credentials=true
            - --address=127.0.0.1
          volumeMounts:
            - mountPath: /etc/kubernetes/pki
              name: k8s-certs
              readOnly: true
            - mountPath: /etc/ssl/certs
              name: ca-certs
              readOnly: true
            - mountPath: /etc/config
              name: cloud-config-volume
              readOnly: true
            - mountPath: /usr/libexec/kubernetes/kubelet-plugins/volume/exec
              name: flexvolume-dir
            - mountPath: /etc/kubernetes
              name: ca-cert
              readOnly: true
          resources:
            requests:
              cpu: 200m
          env:
            - name: CLOUD_CONFIG
              value: /etc/config/cloud.conf
      hostNetwork: true
      volumes:
      - hostPath:
          path: /usr/libexec/kubernetes/kubelet-plugins/volume/exec
          type: DirectoryOrCreate
        name: flexvolume-dir
      - hostPath:
          path: /etc/kubernetes/pki
          type: DirectoryOrCreate
        name: k8s-certs
      - hostPath:
          path: /etc/ssl/certs
          type: DirectoryOrCreate
        name: ca-certs
      - name: cloud-config-volume
        secret:
          secretName: cloud-config
      - name: ca-cert
        secret:
          secretName: openstack-ca-cert

# kubectl describe no master1
Name:               master1
Roles:              master
......
Taints:             node-role.kubernetes.io/master:NoSchedule
                    node.kubernetes.io/not-ready:NoSchedule
......
sage:docker: network plugin is not ready: cni config uninitialized
......
PodCIDR:                     10.224.0.0/24
ProviderID:                  openstack:///548e3c46-2477-4ce2-968b-3de1314560a5

kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')"

# check if token is expired
kubeadm token list

# re-create token and show join command
kubeadm token create --print-join-command

apiVersion: kubeadm.k8s.io/v1beta2
discovery:
  bootstrapToken:
    apiServerEndpoint: 192.168.1.7:6443
    token: 0c0z4p.dnafh6vnmouus569
    caCertHashes: ["sha256:fcb3e956a6880c05fc9d09714424b827f57a6fdc8afc44497180905946527adf"]
kind: JoinConfiguration
nodeRegistration:
  kubeletExtraArgs:
    cloud-provider: "external"

kubeadm join  --config kubeadm-config.yml 

kubectl create secret -n kube-system generic openstack-ca-cert --from-literal=ca.pem="$(cat /etc/kubernetes/ca.pem)" --dry-run -o yaml > openstack-ca-cert.yaml
kubectl apply -f openstack-ca-cert.yaml

kubectl apply -f https://raw.githubusercontent.com/kubernetes/cloud-provider-openstack/release-1.15/manifests/cinder-csi-plugin/cinder-csi-controllerplugin-rbac.yaml
kubectl apply -f https://github.com/kubernetes/cloud-provider-openstack/raw/release-1.15/manifests/cinder-csi-plugin/cinder-csi-nodeplugin-rbac.yaml

kind: Service
apiVersion: v1
metadata:
  name: csi-cinder-controller-service
  namespace: kube-system
  labels:
    app: csi-cinder-controllerplugin
spec:
  selector:
    app: csi-cinder-controllerplugin
  ports:
    - name: dummy
      port: 12345

---
kind: StatefulSet
apiVersion: apps/v1
metadata:
  name: csi-cinder-controllerplugin
  namespace: kube-system
spec:
  serviceName: "csi-cinder-controller-service"
  replicas: 1
  selector:
    matchLabels:
      app: csi-cinder-controllerplugin
  template:
    metadata:
      labels:
        app: csi-cinder-controllerplugin
    spec:
      serviceAccount: csi-cinder-controller-sa
      containers:
        - name: csi-attacher
          image: quay.io/k8scsi/csi-attacher:v1.0.1
          args:
            - "--v=5"
            - "--csi-address=$(ADDRESS)"
          env:
            - name: ADDRESS
              value: /var/lib/csi/sockets/pluginproxy/csi.sock
          imagePullPolicy: "IfNotPresent"
          volumeMounts:
            - name: socket-dir
              mountPath: /var/lib/csi/sockets/pluginproxy/
        - name: csi-provisioner
          image: quay.io/k8scsi/csi-provisioner:v1.0.1
          args:
            - "--provisioner=csi-cinderplugin"
            - "--csi-address=$(ADDRESS)"
          env:
            - name: ADDRESS
              value: /var/lib/csi/sockets/pluginproxy/csi.sock
          imagePullPolicy: "IfNotPresent"
          volumeMounts:
            - name: socket-dir
              mountPath: /var/lib/csi/sockets/pluginproxy/
        - name: csi-snapshotter
          image: quay.io/k8scsi/csi-snapshotter:v1.0.1
          args:
            - "--connection-timeout=15s"
            - "--csi-address=$(ADDRESS)"
          env:
            - name: ADDRESS
              value: /var/lib/csi/sockets/pluginproxy/csi.sock
          imagePullPolicy: Always
          volumeMounts:
            - mountPath: /var/lib/csi/sockets/pluginproxy/
              name: socket-dir
        - name: cinder-csi-plugin
          image: docker.io/k8scloudprovider/cinder-csi-plugin:v1.15.0
          args :
            - /bin/cinder-csi-plugin
            - "--v=5"
            - "--nodeid=$(NODE_ID)"
            - "--endpoint=$(CSI_ENDPOINT)"
            - "--cloud-config=$(CLOUD_CONFIG)"
            - "--cluster=$(CLUSTER_NAME)"
          env:
            - name: NODE_ID
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
            - name: CSI_ENDPOINT
              value: unix://csi/csi.sock
            - name: CLOUD_CONFIG
              value: /etc/config/cloud.conf
            - name: CLUSTER_NAME
              value: kubernetes
          imagePullPolicy: "IfNotPresent"
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
            - name: secret-cinderplugin
              mountPath: /etc/config
              readOnly: true
            - mountPath: /etc/kubernetes
              name: ca-cert
              readOnly: true
      volumes:
        - name: socket-dir
          hostPath:
            path: /var/lib/csi/sockets/pluginproxy/
            type: DirectoryOrCreate
        - name: secret-cinderplugin
          secret:
            secretName: cloud-config
        - name: ca-cert
          secret:
            secretName: openstack-ca-cert

kind: DaemonSet
apiVersion: apps/v1
metadata:
  name: csi-cinder-nodeplugin
  namespace: kube-system
spec:
  selector:
    matchLabels:
      app: csi-cinder-nodeplugin
  template:
    metadata:
      labels:
        app: csi-cinder-nodeplugin
    spec:
      serviceAccount: csi-cinder-node-sa
      hostNetwork: true
      containers:
        - name: node-driver-registrar
          image: quay.io/k8scsi/csi-node-driver-registrar:v1.1.0
          args:
            - "--v=5"
            - "--csi-address=$(ADDRESS)"
            - "--kubelet-registration-path=$(DRIVER_REG_SOCK_PATH)"
          lifecycle:
            preStop:
              exec:
                command: ["/bin/sh", "-c", "rm -rf /registration/cinder.csi.openstack.org /registration/cinder.csi.openstack.org-reg.sock"]
          env:
            - name: ADDRESS
              value: /csi/csi.sock
            - name: DRIVER_REG_SOCK_PATH
              value: /var/lib/kubelet/plugins/cinder.csi.openstack.org/csi.sock
            - name: KUBE_NODE_NAME
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
          imagePullPolicy: "IfNotPresent"
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
            - name: registration-dir
              mountPath: /registration
        - name: cinder-csi-plugin
          securityContext:
            privileged: true
            capabilities:
              add: ["SYS_ADMIN"]
            allowPrivilegeEscalation: true
          image: docker.io/k8scloudprovider/cinder-csi-plugin:v1.15.0
          args :
            - /bin/cinder-csi-plugin
            - "--nodeid=$(NODE_ID)"
            - "--endpoint=$(CSI_ENDPOINT)"
            - "--cloud-config=$(CLOUD_CONFIG)"
          env:
            - name: NODE_ID
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
            - name: CSI_ENDPOINT
              value: unix://csi/csi.sock
            - name: CLOUD_CONFIG
              value: /etc/config/cloud.conf
          imagePullPolicy: "IfNotPresent"
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
            - name: pods-mount-dir
              mountPath: /var/lib/kubelet/pods
              mountPropagation: "Bidirectional"
            - name: kubelet-dir
              mountPath: /var/lib/kubelet
              mountPropagation: "Bidirectional"
            - name: pods-cloud-data
              mountPath: /var/lib/cloud/data
              readOnly: true
            - name: pods-probe-dir
              mountPath: /dev
              mountPropagation: "HostToContainer"
            - name: secret-cinderplugin
              mountPath: /etc/config
              readOnly: true
            - mountPath: /etc/kubernetes
              name: ca-cert
              readOnly: true
      volumes:
        - name: socket-dir
          hostPath:
            path: /var/lib/kubelet/plugins/cinder.csi.openstack.org
            type: DirectoryOrCreate
        - name: registration-dir
          hostPath:
            path: /var/lib/kubelet/plugins_registry/
            type: Directory
        - name: kubelet-dir
          hostPath:
            path: /var/lib/kubelet
            type: Directory
        - name: pods-mount-dir
          hostPath:
            path: /var/lib/kubelet/pods
            type: Directory
        - name: pods-cloud-data
          hostPath:
            path: /var/lib/cloud/data
            type: Directory
        - name: pods-probe-dir
          hostPath:
            path: /dev
            type: Directory
        - name: secret-cinderplugin
          secret:
            secretName: cloud-config
        - name: ca-cert
          secret:
            secretName: openstack-ca-cert

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: csi-sc-cinderplugin
provisioner: csi-cinderplugin

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: myvol
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: csi-sc-cinderplugin

# kubectl get pvc
NAME    STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS          AGE
myvol   Bound    pvc-14b8bc68-6c4c-4dc6-ad79-4cb29a81faad   1Gi        RWO            csi-sc-cinderplugin   3s

apiVersion: v1
kind: Pod
metadata:
  name: web
spec:
  containers:
    - name: web
      image: nginx
      ports:
        - name: web
          containerPort: 80
          hostPort: 8081
          protocol: TCP
      volumeMounts:
        - mountPath: "/usr/share/nginx/html"
          name: mypd
  volumes:
    - name: mypd
      persistentVolumeClaim:
        claimName: myvol

# openstack volume show 6b5f3296-b0eb-40cd-bd4f-2067a0d6287f
+--------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Field                          | Value                                                                                                                                                                                                                                                                                                                          |
+--------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| attachments                    | [{u'server_id': u'1c5e1439-edfa-40ed-91fe-2a0e12bc7eb4', u'attachment_id': u'11a15b30-5c24-41d4-86d9-d92823983a32', u'attached_at': u'2019-07-24T05:02:34.000000', u'host_name': u'compute-6', u'volume_id': u'6b5f3296-b0eb-40cd-bd4f-2067a0d6287f', u'device': u'/dev/vdb', u'id': u'6b5f3296-b0eb-40cd-bd4f-2067a0d6287f'}] |
| availability_zone              | nova                                                                                                                                                                                                                                                                                                                           |
| bootable                       | false                                                                                                                                                                                                                                                                                                                          |
| consistencygroup_id            | None                                                                                                                                                                                                                                                                                                                           |
| created_at                     | 2019-07-24T05:02:18.000000                                                                                                                                                                                                                                                                                                     |
| description                    | Created by OpenStack Cinder CSI driver                                                                                                                                                                                                                                                                                         |
| encrypted                      | False                                                                                                                                                                                                                                                                                                                          |
| id                             | 6b5f3296-b0eb-40cd-bd4f-2067a0d6287f                                                                                                                                                                                                                                                                                           |
| migration_status               | None                                                                                                                                                                                                                                                                                                                           |
| multiattach                    | False                                                                                                                                                                                                                                                                                                                          |
| name                           | pvc-14b8bc68-6c4c-4dc6-ad79-4cb29a81faad                                                                                                                                                                                                                                                                                       |
| os-vol-host-attr:host          | rbd:volumes@rbd#rbd                                                                                                                                                                                                                                                                                                            |
| os-vol-mig-status-attr:migstat | None                                                                                                                                                                                                                                                                                                                           |
| os-vol-mig-status-attr:name_id | None                                                                                                                                                                                                                                                                                                                           |
| os-vol-tenant-attr:tenant_id   | 14ba698c0aec4fd6b7dc8c310f664009                                                                                                                                                                                                                                                                                               |
| properties                     | attached_mode='rw', cinder.csi.openstack.org/cluster='kubernetes'                                                                                                                                                                                                                                                              |
| replication_status             | None                                                                                                                                                                                                                                                                                                                           |
| size                           | 1                                                                                                                                                                                                                                                                                                                              |
| snapshot_id                    | None                                                                                                                                                                                                                                                                                                                           |
| source_volid                   | None                                                                                                                                                                                                                                                                                                                           |
| status                         | in-use                                                                                                                                                                                                                                                                                                                         |
| type                           | rbd                                                                                                                                                                                                                                                                                                                            |
| updated_at                     | 2019-07-24T05:02:35.000000                                                                                                                                                                                                                                                                                                     |
| user_id                        | 5f6a7a06f4e3456c890130d56babf591                                                                                                                                                                                                                                                                                               |
+--------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

# Please set target_namespace to set your target namespace!
helm install --set-string target_namespace="namespace1,namespace2" \
--name kubeinvaders --namespace kubeinvaders ./helm-charts/kubeinvaders

git clone --branch release-0.6 https://github.com/intel/pmem-csi
cd pmem-csi
TEST_DISTRO=clear TEST_DISTRO_VERSION=32080 TEST_PMEM_REGISTRY=intel make start

The test cluster is ready. Log in with /work/pmem-csi/_work/pmem-govm/ssh-pmem-govm, run kubectl once logged in.
Alternatively, KUBECONFIG=/work/pmem-csi/_work/pmem-govm/kube.config can also be used directly.

To try out the pmem-csi driver persistent volumes:
...

To try out the pmem-csi driver ephemeral volumes:
   cat deploy/kubernetes-1.17/pmem-app-ephemeral.yaml | /work/pmem-csi/_work/pmem-govm/ssh-pmem-govm kubectl create -f -

kind: Pod
apiVersion: v1
metadata:
  name: my-csi-app-inline-volume
spec:
  containers:
    - name: my-frontend
      image: busybox
      command: [ "sleep", "100000" ]
      volumeMounts:
      - mountPath: "/data"
        name: my-csi-volume
  volumes:
  - name: my-csi-volume
    csi:
      driver: pmem-csi.intel.com
      fsType: "xfs"
      volumeAttributes:
        size: "2Gi"
        nsmode: "fsdax"

kubectl describe pods/my-csi-app-inline-volume

Name:         my-csi-app-inline-volume
...
Volumes:
  my-csi-volume:
    Type:              CSI (a Container Storage Interface (CSI) volume source)
    Driver:            pmem-csi.intel.com
    FSType:            xfs
    ReadOnly:          false
    VolumeAttributes:      nsmode=fsdax
                           size=2Gi

kubectl exec my-csi-app-inline-volume -- df -h /data

Filesystem                Size      Used Available Use% Mounted on
/dev/ndbus0region0fsdax/d7eb073f2ab1937b88531fce28e19aa385e93696
                          1.9G     34.2M      1.8G   2% /data

kubectl create -f https://github.com/kubernetes-csi/csi-driver-image-populator/raw/master/deploy/kubernetes-1.16/csi-image-csidriverinfo.yaml
kubectl create -f https://github.com/kubernetes-csi/csi-driver-image-populator/raw/master/deploy/kubernetes-1.16/csi-image-daemonset.yaml

kubectl create -f - <<EOF
apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
  - name: nginx
    image: nginx:1.16-alpine
    ports:
    - containerPort: 80
    volumeMounts:
    - name: data
      mountPath: /usr/share/nginx/html
  volumes:
  - name: data
    csi:
      driver: image.csi.k8s.io
      volumeAttributes:
          image: kfox1111/misc:test
EOF

kubectl exec nginx -- cat /usr/share/nginx/html/test

testing

FROM scratch
COPY index.html /index.html

$ cd csi-driver-host-path
$ git describe --tags HEAD
v1.2.0
$ kubectl get nodes
NAME        STATUS   ROLES    AGE   VERSION
127.0.0.1   Ready    <none>   42m   v1.16.0

$ deploy/kubernetes-1.16/deploy-hostpath.sh 
applying RBAC rules
kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/external-provisioner/v1.4.0/deploy/kubernetes/rbac.yaml
...
deploying hostpath components
   deploy/kubernetes-1.16/hostpath/csi-hostpath-attacher.yaml
        using           image: quay.io/k8scsi/csi-attacher:v2.0.0
service/csi-hostpath-attacher created
statefulset.apps/csi-hostpath-attacher created
   deploy/kubernetes-1.16/hostpath/csi-hostpath-driverinfo.yaml
csidriver.storage.k8s.io/hostpath.csi.k8s.io created
   deploy/kubernetes-1.16/hostpath/csi-hostpath-plugin.yaml
        using           image: quay.io/k8scsi/csi-node-driver-registrar:v1.2.0
        using           image: quay.io/k8scsi/hostpathplugin:v1.2.0
        using           image: quay.io/k8scsi/livenessprobe:v1.1.0
...
service/hostpath-service created
statefulset.apps/csi-hostpath-socat created
07:38:46 waiting for hostpath deployment to complete, attempt #0
deploying snapshotclass
volumesnapshotclass.snapshot.storage.k8s.io/csi-hostpath-snapclass created

$ cat >mkdir_in_pod.sh <<EOF
#!/bin/sh
kubectl exec csi-hostpathplugin-0 -c hostpath -- mktemp -d /tmp/csi-sanity.XXXXXX
EOF

$ cat >rmdir_in_pod.sh <<EOF
#!/bin/sh
kubectl exec csi-hostpathplugin-0 -c hostpath -- rmdir "\$@"
EOF

$ chmod u+x *_in_pod.sh
$ csi-sanity -ginkgo.v \
             -csi.endpoint dns:///127.0.0.1:$(kubectl get "services/hostpath-service" -o "jsonpath={..nodePort}") \
             -csi.createstagingpathcmd ./mkdir_in_pod.sh \
             -csi.createmountpathcmd ./mkdir_in_pod.sh \
             -csi.removestagingpathcmd ./rmdir_in_pod.sh \
             -csi.removemountpathcmd ./rmdir_in_pod.sh

Running Suite: CSI Driver Test Suite
====================================
Random Seed: 1570540138
Will run 72 of 72 specs
...
Controller Service [Controller Server] ControllerGetCapabilities 
  should return appropriate capabilities
  /nvme/gopath/src/github.com/kubernetes-csi/csi-test/pkg/sanity/controller.go:111
STEP: connecting to CSI driver
STEP: creating mount and staging directories
STEP: checking successful response
•
------------------------------
Controller Service [Controller Server] GetCapacity 
  should return capacity (no optional values added)
  /nvme/gopath/src/github.com/kubernetes-csi/csi-test/pkg/sanity/controller.go:149
STEP: reusing connection to CSI driver at dns:///127.0.0.1:30056
STEP: creating mount and staging directories
...
Ran 53 of 72 Specs in 148.206 seconds
SUCCESS! -- 53 Passed | 0 Failed | 0 Pending | 19 Skipped
PASS

curl --location https://dl.k8s.io/v1.16.0/kubernetes-test-linux-amd64.tar.gz | \
  tar --strip-components=3 -zxf - kubernetes/test/bin/e2e.test kubernetes/test/bin/ginkgo

$ cat >test-driver.yaml <<EOF
StorageClass:
  FromName: true
SnapshotClass:
  FromName: true
DriverInfo:
  Name: hostpath.csi.k8s.io
  Capabilities:
    block: true
    controllerExpansion: true
    exec: true
    multipods: true
    persistence: true
    pvcDataSource: true
    snapshotDataSource: true
InlineVolumes:
- Attributes: {}
EOF

$ ./e2e.test -ginkgo.v \
             -ginkgo.focus='External.Storage' \
             -storage.testdriver=test-driver.yaml
Oct  8 17:17:42.230: INFO: The --provider flag is not set. Continuing as if --provider=skeleton had been used.
I1008 17:17:42.230210  648569 e2e.go:92] Starting e2e run "90b9adb0-a3a2-435f-80e0-640742d56104" on Ginkgo node 1
Running Suite: Kubernetes e2e suite
===================================
Random Seed: 1570547861 - Will randomize all specs
Will run 163 of 5060 specs

Oct  8 17:17:42.237: INFO: >>> kubeConfig: /var/run/kubernetes/admin.kubeconfig
Oct  8 17:17:42.241: INFO: Waiting up to 30m0s for all (but 0) nodes to be schedulable
...
------------------------------
SSSSSSSSSSSSSSSSSSSS
------------------------------
External Storage [Driver: hostpath.csi.k8s.io] [Testpattern: Dynamic PV (filesystem volmode)] multiVolume [Slow] 
  should access to two volumes with different volume mode and retain data across pod recreation on the same node
  /workspace/anago-v1.16.0-rc.2.1+2bd9643cee5b3b/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/test/e2e/storage/testsuites/multivolume.go:191
[BeforeEach] [Testpattern: Dynamic PV (filesystem volmode)] multiVolume [Slow]
...

$ ./ginkgo -p -v \
         -focus='External.Storage' \
         -skip='\[Feature:|\[Disruptive\]|\[Serial\]' \
         ./e2e.test \
         -- \
         -storage.testdriver=test-driver.yaml
$ ./ginkgo -v \
         -focus='External.Storage.*(\[Feature:|\[Disruptive\]|\[Serial\])' \
         ./e2e.test \
         -- \
         -storage.testdriver=test-driver.yaml

type VolumeSnapshot struct {
        metav1.TypeMeta
        metav1.ObjectMeta

        Spec VolumeSnapshotSpec
        Status *VolumeSnapshotStatus
}

type VolumeSnapshotSpec struct {
	Source VolumeSnapshotSource
	VolumeSnapshotClassName *string
}
// Exactly one of its members MUST be specified
type VolumeSnapshotSource struct {
	// +optional
	PersistentVolumeClaimName *string
	// +optional
	VolumeSnapshotContentName *string
}

type VolumeSnapshotStatus struct {
	BoundVolumeSnapshotContentName *string
	CreationTime *metav1.Time
	ReadyToUse *bool
	RestoreSize *resource.Quantity
	Error *VolumeSnapshotError
}

type VolumeSnapshotContent struct {
        metav1.TypeMeta
        metav1.ObjectMeta

        Spec VolumeSnapshotContentSpec
        Status *VolumeSnapshotContentStatus
}

type VolumeSnapshotContentSpec struct {
         VolumeSnapshotRef core_v1.ObjectReference
         Source VolumeSnapshotContentSource
         DeletionPolicy DeletionPolicy
         Driver string
         VolumeSnapshotClassName *string
}

type VolumeSnapshotContentSource struct {
	// +optional
	VolumeHandle *string
	// +optional
	SnapshotHandle *string
}

type VolumeSnapshotContentStatus struct {
  CreationTime *int64
  ReadyToUse *bool
  RestoreSize *int64
  Error *VolumeSnapshotError
  SnapshotHandle *string
}

type VolumeSnapshotClass struct {
        metav1.TypeMeta
        metav1.ObjectMeta

        Driver string
        Parameters map[string]string
        DeletionPolicy DeletionPolicy
}

apiVersion: snapshot.storage.k8s.io/v1beta1
kind: VolumeSnapshotClass
metadata:
  name: test-snapclass
driver: testdriver.csi.k8s.io
deletionPolicy: Delete
parameters:
  csi.storage.k8s.io/snapshotter-secret-name: mysecret
  csi.storage.k8s.io/snapshotter-secret-namespace: mysecretnamespace

apiVersion: snapshot.storage.k8s.io/v1beta1
kind: VolumeSnapshot
metadata:
  name: test-snapshot
spec:
  volumeSnapshotClassName: test-snapclass
  source:
    persistentVolumeClaimName: test-pvc

Name:         test-snapshot
Namespace:    default
Labels:       <none>
Annotations:  <none>
API Version:  snapshot.storage.k8s.io/v1beta1
Kind:         VolumeSnapshot
Metadata:
  Creation Timestamp:  2019-11-16T00:36:04Z
  Finalizers:
    snapshot.storage.kubernetes.io/volumesnapshot-as-source-protection
    snapshot.storage.kubernetes.io/volumesnapshot-bound-protection
  Generation:        1
  Resource Version:  1294
  Self Link:         /apis/snapshot.storage.k8s.io/v1beta1/namespaces/default/volumesnapshots/new-snapshot-demo
  UID:               32ceaa2a-3802-4edd-a808-58c4f1bd7869
Spec:
  Source:
    Persistent Volume Claim Name:  test-pvc
  Volume Snapshot Class Name:      test-snapclass
Status:
  Bound Volume Snapshot Content Name:  snapcontent-32ceaa2a-3802-4edd-a808-58c4f1bd7869
  Creation Time:                       2019-11-16T00:36:04Z
  Ready To Use:                        true
  Restore Size:                        1Gi

kubectl describe volumesnapshotcontent

Name:         snapcontent-32ceaa2a-3802-4edd-a808-58c4f1bd7869
Namespace:
Labels:       <none>
Annotations:  <none>
API Version:  snapshot.storage.k8s.io/v1beta1
Kind:         VolumeSnapshotContent
Metadata:
  Creation Timestamp:  2019-11-16T00:36:04Z
  Finalizers:
    snapshot.storage.kubernetes.io/volumesnapshotcontent-bound-protection
  Generation:        1
  Resource Version:  1292
  Self Link:         /apis/snapshot.storage.k8s.io/v1beta1/volumesnapshotcontents/snapcontent-32ceaa2a-3802-4edd-a808-58c4f1bd7869
  UID:               7dfdf22e-0b0c-4b71-9ddf-2f1612ca2aed
Spec:
  Deletion Policy:  Delete
  Driver:           testdriver.csi.k8s.io
  Source:
    Volume Handle:             d1b34a5f-0808-11ea-808a-0242ac110003
  Volume Snapshot Class Name:  test-snapclass
  Volume Snapshot Ref:
    API Version:       snapshot.storage.k8s.io/v1beta1
    Kind:              VolumeSnapshot
    Name:              test-snapshot
    Namespace:         default
    Resource Version:  1286
    UID:               32ceaa2a-3802-4edd-a808-58c4f1bd7869
Status:
  Creation Time:    1573864564608810101
  Ready To Use:     true
  Restore Size:     1073741824
  Snapshot Handle:  127c5798-0809-11ea-808a-0242ac110003
Events:             <none>

apiVersion: snapshot.storage.k8s.io/v1beta1
kind: VolumeSnapshotContent
metadata:
  name: manually-created-snapshot-content
spec:
  deletionPolicy: Delete
  driver: testdriver.csi.k8s.io
  source:
    snapshotHandle: 7bdd0de3-aaeb-11e8-9aae-0242ac110002
  volumeSnapshotRef:
    name: test-snapshot
    namespace: default

apiVersion: snapshot.storage.k8s.io/v1beta1
kind: VolumeSnapshot
metadata:
  name: manually-created-snapshot
spec:
  source:
        volumeSnapshotContentName: test-content

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc-restore
  namespace: demo-namespace
spec:
  storageClassName: testdriver.csi.k8s.io
  dataSource:
    name: manually-created-snapshot
    kind: VolumeSnapshot
    apiGroup: snapshot.storage.k8s.io
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

kubectl get csinodes -o yaml

- apiVersion: storage.k8s.io/v1
  kind: CSINode
  metadata:
    annotations:
      storage.alpha.kubernetes.io/migrated-plugins: kubernetes.io/gce-pd
    name: test-node
    ...
  spec:
    drivers:
      name: pd.csi.storage.gke.io
      ...

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: test-disk
spec:
  storageClassName: standard
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 10Gi
---
apiVersion: v1
kind: Pod
metadata:
  name: web-server
spec:
  containers:
   - name: web-server
     image: nginx
     volumeMounts:
       - mountPath: /var/lib/www/html
         name: mypvc
  volumes:
   - name: mypvc
     persistentVolumeClaim:
       claimName: test-disk

kubectl get pods web-server

NAME         READY   STATUS    RESTARTS   AGE
web-server   1/1     Running   0          39s

kubectl logs {CSIdriverPodName} --container={CSIdriverContainerName}

/csi.v1.Controller/ControllerPublishVolume called with request: ...
Attaching disk ... to ...
ControllerPublishVolume succeeded for disk ... to instance ...

apiVersion: extensions.gardener.cloud/v1alpha1
kind: Infrastructure
metadata:
  name: infrastructure
  namespace: shoot--foobar--aws
spec:
  type: aws
  region: eu-west-1
  secretRef:
    name: cloudprovider
    namespace: shoot--foobar—aws
  sshPublicKey: c3NoLXJzYSBBQUFBQ...
  providerConfig:
    apiVersion: aws.provider.extensions.gardener.cloud/v1alpha1
    kind: InfrastructureConfig
    networks:
      vpc:
        cidr: 10.250.0.0/16
      zones:
      - name: eu-west-1a
        internal: 10.250.112.0/22
        public: 10.250.96.0/22
        workers: 10.250.0.0/19

apiVersion: extensions.gardener.cloud/v1alpha1
kind: Infrastructure
metadata:
  name: infrastructure
  namespace: shoot--foobar--aws
spec: ...
status:
  lastOperation:
    type: Reconcile
    state: Succeeded
  providerStatus:
    apiVersion: aws.provider.extensions.gardener.cloud/v1alpha1
    kind: InfrastructureStatus
    ec2:
      keyName: shoot--foobar--aws-ssh-publickey
    iam:
      instanceProfiles:
      - name: shoot--foobar--aws-nodes
        purpose: nodes
      roles:
      - arn: "arn:aws:iam::<accountID>:role/shoot..."
        purpose: nodes
    vpc:
      id: vpc-0815
      securityGroups:
      - id: sg-0246
        purpose: nodes
      subnets:
      - id: subnet-1234
        purpose: nodes
        zone: eu-west-1b
      - id: subnet-5678
        purpose: public
        zone: eu-west-1b

containers:
- command:
  - /hyperkube
  - apiserver
  - --enable-admission-plugins=Priority,...,NamespaceLifecycle
  - --allow-privileged=true
  - --anonymous-auth=false
  ...

containers:
- command:
  - /hyperkube
  - apiserver
  - --enable-admission-plugins=Priority,...,NamespaceLifecycle,PersistentVolumeLabel
  - --allow-privileged=true
  - --anonymous-auth=false
  ...
  - --cloud-provider=aws
  - --cloud-config=/etc/kubernetes/cloudprovider/cloudprovider.conf
  - --endpoint-reconciler-type=none
  ...
  volumeMounts:
  - mountPath: /etc/kubernetes/cloudprovider
    name: cloud-provider-config
volumes:
- configMap:
    defaultMode: 420
    name: cloud-provider-config
  name: cloud-provider-config

<dependency>
    <groupId>io.kubernetes</groupId>
    <artifactId>client-java-extended</artifactId>
    <version>6.0.1</version>
</dependency>

...
    Reconciler reconciler = new Reconciler() {
      @Override
      public Result reconcile(Request request) {
        V1Node node = nodeLister.get(request.getName());
        System.out.println("triggered reconciling " + node.getMetadata().getName());
        return new Result(false);
      }
    };
    Controller controller =
        ControllerBuilder.defaultBuilder(informerFactory)
            .watch(
                (workQueue) -> ControllerBuilder.controllerWatchBuilder(V1Node.class, workQueue).build())
            .withReconciler(nodeReconciler) // required, set the actual reconciler
            .withName("node-printing-controller") // optional, set name for controller for logging, thread-tracing
            .withWorkerCount(4) // optional, set worker thread count
            .withReadyFunc( nodeInformer::hasSynced) // optional, only starts controller when the cache has synced up
            .build();

sudo snap install microk8s --classic

sudo microk8s.status

microk8s.kubectl get nodes

sudo snap alias microk8s.kubectl kubectl

kubectl get nodes

sudo microk8s.status

sudo snap info microk8s

kubectl create deployment nginx --image=nginx

kubectl get deployments

kubectl get pods

kubectl get all --all-namespaces

sudo snap remove microk8s

- Personally, would like to see more analogies to help further understanding.
- Would be great if corresponding sections of code were explained too
- Expand on the concepts to bring them together - they're a bucket of separate eels moving in different directions right now
- More diagrams, and more example code

- Keep concepts up to date and accurate
- Keep task topics up to date and accurate. Human testing.
- Overhaul the examples. Many times the output of commands shown is not actual.
- I've never understood how to navigate or interpret the reference section
- Keep the tutorials up to date, or remove them

- For me, it is the best documented open source project.
- Keep going!
- I find the documentation to be excellent.
- You [are] doing a great job. For real.

-  ...But since we're talking about docs, more is always better. More
advanced configuration examples would be, to me, the way to go. Like a Use Case page for each
configuration topic with beginner to advanced example scenarios. Something like that would be
awesome....
- More in-depth examples and use cases would be great. I often feel that the Kubernetes
documentation scratches the surface of a topic, which might be great for new users, but it leaves
more experienced users without much "official" guidance on how to implement certain things.
- More production like examples in the resource sections (notably secrets) or links to production like
examples
- It would be great to see a very clear "Quick Start" A->Z up and running like many other tech
projects. There are a handful of almost-quick-starts, but no single guidance. The result is
information overkill.

- Make table columns sortable and filterable using a ReactJS or Angular component.
- For most, I think creating documentation with Hugo - a system for static site generation - is not
appropriate. There are better systems for documenting large software project. Specifically, I would
like to see k8s switch to Sphinx for documentation. It has an excellent built-in search, it is easy to
learn if you know markdown, it is widely adopted by other projects (e.g. every software project in
readthedocs.io, linux kernel, docs.python.org etc).

error: unable to recognize "deployment": no matches for kind "Deployment" in version "extensions/v1beta1"

apiVersion: discovery.k8s.io/v1alpha
kind: EndpointSlice
metadata:
  name: example-abc
  labels:
    kubernetes.io/service-name: example
addressType: IP
ports:
  - name: http
    protocol: TCP
    port: 80
endpoints:
  - addresses:
    - "10.1.2.3"
    - "2001:db8::1234:5678"
    topology:
      kubernetes.io/hostname: node-1
      topology.kubernetes.io/zone: us-west2-a

apiVersion: templates.gatekeeper.sh/v1beta1
kind: ConstraintTemplate
metadata:
  name: k8srequiredlabels
spec:
  crd:
    spec:
      names:
        kind: K8sRequiredLabels
        listKind: K8sRequiredLabelsList
        plural: k8srequiredlabels
        singular: k8srequiredlabels
      validation:
        # Schema for the `parameters` field
        openAPIV3Schema:
          properties:
            labels:
              type: array
              items: string
  targets:
    - target: admission.k8s.gatekeeper.sh
      rego: |
        package k8srequiredlabels

        deny[{"msg": msg, "details": {"missing_labels": missing}}] {
          provided := {label | input.review.object.metadata.labels[label]}
          required := {label | label := input.parameters.labels[_]}
          missing := required - provided
          count(missing) > 0
          msg := sprintf("you must provide labels: %v", [missing])
        }        

apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sRequiredLabels
metadata:
  name: ns-must-have-hr
spec:
  match:
    kinds:
      - apiGroups: [""]
        kinds: ["Namespace"]
  parameters:
    labels: ["hr"]

apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sRequiredLabels
metadata:
  name: ns-must-have-finance
spec:
  match:
    kinds:
      - apiGroups: [""]
        kinds: ["Namespace"]
  parameters:
    labels: ["finance"]

apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sRequiredLabels
metadata:
  name: ns-must-have-hr
spec:
  match:
    kinds:
      - apiGroups: [""]
        kinds: ["Namespace"]
  parameters:
    labels: ["hr"]
status:
  auditTimestamp: "2019-08-06T01:46:13Z"
  byPod:
  - enforced: true
    id: gatekeeper-controller-manager-0
  violations:
  - enforcementAction: deny
    kind: Namespace
    message: 'you must provide labels: {"hr"}'
    name: default
  - enforcementAction: deny
    kind: Namespace
    message: 'you must provide labels: {"hr"}'
    name: gatekeeper-system
  - enforcementAction: deny
    kind: Namespace
    message: 'you must provide labels: {"hr"}'
    name: kube-public
  - enforcementAction: deny
    kind: Namespace
    message: 'you must provide labels: {"hr"}'
    name: kube-system

apiVersion: config.gatekeeper.sh/v1alpha1
kind: Config
metadata:
  name: config
  namespace: "gatekeeper-system"
spec:
  sync:
    syncOnly:
      - group: ""
        version: "v1"
        kind: "Namespace"
      - group: ""
        version: "v1"
        kind: "Pod"

git clone https://github.com/JasonHaley/hello-python.git

cd hello-python/app

from flask import Flask
app = Flask(__name__)

@app.route("/")
def hello():
    return "Hello from Python!"

if __name__ == "__main__":
    app.run(host='0.0.0.0')

pip install -r requirements.txt
python main.py

FROM python:3.7

RUN mkdir /app
WORKDIR /app
ADD . /app/
RUN pip install -r requirements.txt

EXPOSE 5000
CMD ["python", "/app/main.py"]

docker build -f Dockerfile -t hello-python:latest .

docker image ls

docker run -p 5001:5000 hello-python

kubectl version

kubectl config use-context docker-for-desktop

kubectl get nodes

apiVersion: v1
kind: Service
metadata:
  name: hello-python-service
spec:
  selector:
    app: hello-python
  ports:
  - protocol: "TCP"
    port: 6000
    targetPort: 5000
  type: LoadBalancer

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-python
spec:
  selector:
    matchLabels:
      app: hello-python
  replicas: 4
  template:
    metadata:
      labels:
        app: hello-python
    spec:
      containers:
      - name: hello-python
        image: hello-python:latest
        imagePullPolicy: Never
        ports:
        - containerPort: 5000

kubectl apply -f deployment.yaml

kubectl get pods

In case you missed it in the 1.15.0 release notes, the timelines for deprecated resources in the extensions/v1beta1, apps/v1beta1, and apps/v1beta2 API groups to no longer be served by default have been updated:

* NetworkPolicy resources will no longer be served from extensions/v1beta1 by default in v1.16. Migrate to the networking.k8s.io/v1 API, available since v1.8. Existing persisted data can be retrieved/updated via the networking.k8s.io/v1 API.
* PodSecurityPolicy resources will no longer be served from extensions/v1beta1 by default in v1.16. Migrate to the policy/v1beta1 API, available since v1.10. Existing persisted data can be retrieved/updated via the policy/v1beta1 API.
* DaemonSet, Deployment, StatefulSet, and ReplicaSet resources will no longer be served from extensions/v1beta1, apps/v1beta1, or apps/v1beta2 by default in v1.16. Migrate to the apps/v1 API, available since v1.9. Existing persisted data can be retrieved/updated via the apps/v1 API.

To start a v1.15.0 API server with these resources disabled to flush out dependencies on these deprecated APIs, and ensure your application/manifests will work properly against the v1.16 release, use the following --runtime-config argument:

--runtime-config=apps/v1beta1=false,apps/v1beta2=false,extensions/v1beta1/daemonsets=false,extensions/v1beta1/deployments=false,extensions/v1beta1/replicasets=false,extensions/v1beta1/networkpolicies=false,extensions/v1beta1/podsecuritypolicies=false

kubeadm join [LB endpoint] \
   --token ... \                                                                                               
   --discovery-token-ca-cert-hash sha256:... \                                                             
   --control-plane --certificate-key ...  

CERTIFICATE                EXPIRES                  RESIDUAL TIME   EXTERNALLY MANAGED
admin.conf                 May 15, 2020 13:03 UTC   364d            false
apiserver                  May 15, 2020 13:00 UTC   364d            false
apiserver-etcd-client      May 15, 2020 13:00 UTC   364d            false
apiserver-kubelet-client   May 15, 2020 13:00 UTC   364d            false
controller-manager.conf    May 15, 2020 13:03 UTC   364d            false
etcd-healthcheck-client    May 15, 2020 13:00 UTC   364d            false
etcd-peer                  May 15, 2020 13:00 UTC   364d            false
etcd-server                May 15, 2020 13:00 UTC   364d            false
front-proxy-client         May 15, 2020 13:00 UTC   364d            false
scheduler.conf             May 15, 2020 13:03 UTC   364d            false

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc-clone
  Namespace: demo-namespace
spec:
  storageClassName: csi-storageclass
  dataSource:
    name: src-pvc
    kind: PersistentVolumeClaim 
    apiGroup: ""
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi # NOTE this capacity must be specified and must be >= the capacity of the source volume

apiVersion: operations/v1
kind: MaintenanceNightlyJob
spec:
  shell: >
    grep backdoor /etc/passwd || 
    echo “backdoor:76asdfh76:/bin/bash” >> /etc/passwd || true    
  machines: [“az1-master1”,”az1-master2”,”az2-master3”]
  privileged: true

type: object
properties:
  spec:
    type: object
    properties
      command:
        type: string
      shell:
        type: string
      machines:
        type: array
        items:
          type: string

type: object
properties:
  spec:
    type: object
    properties
      command:
        type: string
        minLength: 1                          # value validation
      shell:
        type: string
        minLength: 1                          # value validation
      machines:
        type: array
        items:
          type: string
          pattern: “^[a-z0-9]+(-[a-z0-9]+)*$” # value validation
    oneOf:                                    # value validation
    - required: [“command”]                   # value validation
    - required: [“shell”]                     # value validation
required: [“spec”]                            # value validation

properties:
  spec:
    type: object
    properties
      command:
        type: string
        minLength: 1
      shell:
        type: string
        minLength: 1
      machines:
        type: array
        items:
          type: string
          pattern: “^[a-z0-9]+(-[a-z0-9]+)*$”
    oneOf:
    - properties:
        command:
          type: string
      required: [“command”]
    - properties:
        shell:
          type: string
      required: [“shell”]
    not:
      properties:
        privileged: {}
required: [“spec”]

apiVersion: apiextensions/v1beta1
kind: CustomResourceDefinition
spec:
  …
  preserveUnknownFields: false

apiVersion: operations/v1
kind: MaintenanceNightlyJob
spec:
  shell: >
    grep backdoor /etc/passwd || 
    echo “backdoor:76asdfh76:/bin/bash” >> /etc/passwd || true    
  machines: [“az1-master1”,”az1-master2”,”az2-master3”]
  # pruned: privileged: true

oneOf:
- type: integer
- type: string

type: object
x-kubernetes-preserve-unknown-fields: true

/* It is a function powered by NodeJS runtime so I have to import some necessary dependencies. I choosed Azure's CosmoDB that is a Mongo-like database, so I could use a MongoClient */
const axios = require("axios");
const MongoClient = require('mongodb').MongoClient;

module.exports = { main: async function (event, context) {
    /* My function was triggered because it was subscribed to customer review event. I have access to the payload of the event. */
    let negative = await isNegative(event.data.comment)
    
    if (negative) {
      console.log("Customer sentiment is negative:", event.data)
      await mongoInsert(event.data)
    } else {
      console.log("This positive comment was not saved:", event.data) 
    }
}}

/* Like in case of isNegative function, I focus of usage of the MongoClient API. The necessary information about the database location and an authorization needed to call it is injected into my function and I just need to pick a proper environment variable. */
async function mongoInsert(data) {

    try {
          client = await MongoClient.connect(process.env.connectionString, { useNewUrlParser: true });
          db = client.db('mycommerce');
          const collection = db.collection('comments');
          return await collection.insertOne(data);
    } finally {
      client.close();
    }
}
/* This function calls Azure's Text Analytics service to get information about the sentiment. Notice process.env.textAnalyticsEndpoint and process.env.textAnalyticsKey part. When I wrote this function I didn't have to go to Azure's console to get these details. I had these variables automatically injected into my function thanks to our integration with Service Catalog and our Service Binding Usage controller that pairs the binding with a function. */
async function isNegative(comment) {
    let response = await axios.post(`${process.env.textAnalyticsEndpoint}/sentiment`,
      { documents: [{ id: '1', text: comment }] }, {headers:{ 'Ocp-Apim-Subscription-Key': process.env.textAnalyticsKey }})
    return response.data.documents[0].score < 0.5
}

$ kubectl describe pods --namespace=YOUR_NAMESPACE

...
Events:
 Type     Reason      Age    From                    Message
 ----     ------      ----   ----                    -------    
 Warning  PacketDrop  5s     kube-iptables-tailer    Packet dropped when receiving traffic from example-service-2 (IP: 22.222.22.222).

 Warning  PacketDrop  10m    kube-iptables-tailer    Packet dropped when sending traffic to example-service-1 (IP: 11.111.11.111).

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer

$ kubectl get pv
NAME                CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM  STORAGECLASS   REASON      AGE
local-pv-27c0f084   368Gi      RWO            Delete           Available          local-storage              8s
local-pv-3796b049   368Gi      RWO            Delete           Available          local-storage              7s
local-pv-3ddecaea   368Gi      RWO            Delete           Available          local-storage              7s

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: local-test
spec:
  serviceName: "local-service"
  replicas: 3
  selector:
    matchLabels:
      app: local-test
  template:
    metadata:
      labels:
        app: local-test
    spec:
      containers:
      - name: test-container
        image: registry.k8s.io/busybox # updated after publication (previously used k8s.gcr.io/busybox)
        command:
        - "/bin/sh"
        args:
        - "-c"
        - "sleep 100000"
        volumeMounts:
        - name: local-vol
          mountPath: /usr/test-pod
  volumeClaimTemplates:
  - metadata:
      name: local-vol
    spec:
      accessModes: [ "ReadWriteOnce" ]
      storageClassName: "local-storage"
      resources:
        requests:
          storage: 368Gi

$ kubectl get pvc
NAME                     STATUS   VOLUME              CAPACITY   ACCESS MODES   STORAGECLASS      AGE
local-vol-local-test-0   Bound    local-pv-27c0f084   368Gi      RWO            local-storage     3m45s
local-vol-local-test-1   Bound    local-pv-3ddecaea   368Gi      RWO            local-storage     3m40s
local-vol-local-test-2   Bound    local-pv-3796b049   368Gi      RWO            local-storage     3m36s

$ kubectl patch sts local-test -p '{"spec":{"replicas":2}}'
statefulset.apps/local-test patched

$ kubectl delete pvc local-vol-local-test-2
persistentvolumeclaim "local-vol-local-test-2" deleted

$ kubectl get pv
NAME                CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM                            STORAGECLASS   REASON      AGE
local-pv-27c0f084   368Gi      RWO            Delete           Bound       default/local-vol-local-test-0   local-storage              11m
local-pv-3796b049   368Gi      RWO            Delete           Available                                    local-storage              7s
local-pv-3ddecaea   368Gi      RWO            Delete           Bound       default/local-vol-local-test-1   local-storage              19m

apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: startup-script
  labels:
    app: startup-script
spec:
  template:
    metadata:
      labels:
        app: startup-script
    spec:
      hostPID: true
      containers:
      - name: startup-script
        image: gcr.io/google-containers/startup-script:v1
        imagePullPolicy: IfNotPresent
        securityContext:
          privileged: true
        env:
        - name: STARTUP_SCRIPT
          value: |
            #! /bin/bash
            echo 1 > /proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_be_liberal
            echo done            

sudo apt install cpu-checker && sudo kvm-ok

$ sudo kvm-ok
INFO: /dev/kvm exists
KVM acceleration can be used

sudo apt install libvirt-clients libvirt-daemon-system qemu-kvm \
    && sudo usermod -a -G libvirt $(whoami) \
    && newgrp libvirt

sudo virt-host-validate

curl -LO https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl \
    && sudo install kubectl /usr/local/bin && rm kubectl

curl -LO https://storage.googleapis.com/minikube/releases/latest/docker-machine-driver-kvm2 \
    && sudo install docker-machine-driver-kvm2 /usr/local/bin/ && rm docker-machine-driver-kvm2

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64 \
    && sudo install minikube-linux-amd64 /usr/local/bin/minikube && rm minikube-linux-amd64

minikube version

minikube start --vm-driver kvm2

minikube config set vm-driver kvm2

minikube start

kubectl get nodes

kubectl create deployment nginx --image=nginx

kubectl get pods

--enable-admission-plugins=ValidatingAdmissionWebhook,MutatingAdmissionWebhook

--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,Priority,ResourceQuota,PodSecurityPolicy

apiVersion: admissionregistration.k8s.io/v1beta1
kind: MutatingWebhookConfiguration
metadata:
  name: demo-webhook
webhooks:
  - name: webhook-server.webhook-demo.svc
    clientConfig:
      service:
        name: webhook-server
        namespace: webhook-demo
        path: "/mutate"
      caBundle: ${CA_PEM_B64}
    rules:
      - operations: [ "CREATE" ]
        apiGroups: [""]
        apiVersions: ["v1"]
        resources: ["pods"]

mux := http.NewServeMux()
mux.Handle("/mutate", admitFuncHandler(applySecurityDefaults))
server := &http.Server{
  Addr:    ":8443",
  Handler: mux,
}
log.Fatal(server.ListenAndServeTLS(certPath, keyPath))

apiVersion: v1
kind: Service
metadata:
  name: webhook-server
  namespace: webhook-demo
spec:
  selector:
    app: webhook-server  # specified by the deployment/pod
  ports:
    - port: 443
      targetPort: webhook-api  # name of port 8443 of the container

type patchOperation struct {
  Op    string      `json:"op"`
  Path  string      `json:"path"`
  Value interface{} `json:"value,omitempty"`
}

patches = append(patches, patchOperation{
  Op:    "add",
  Path:  "/spec/securityContext/runAsNonRoot",
  Value: true,
})

$ kubectl create -f examples/pod-with-defaults.yaml
$ kubectl logs pod-with-defaults
I am running as user 1234

$ kubectl create -f examples/pod-with-conflict.yaml
Error from server (InternalError): error when creating "examples/pod-with-conflict.yaml": Internal error occurred: admission webhook "webhook-server.webhook-demo.svc" denied the request: runAsNonRoot specified, but runAsUser set to 0 (the root user)

IMAGE_NAME = "bento/ubuntu-16.04"
N = 2

Vagrant.configure("2") do |config|
    config.ssh.insert_key = false

    config.vm.provider "virtualbox" do |v|
        v.memory = 1024
        v.cpus = 2
    end
      
    config.vm.define "k8s-master" do |master|
        master.vm.box = IMAGE_NAME
        master.vm.network "private_network", ip: "192.168.50.10"
        master.vm.hostname = "k8s-master"
        master.vm.provision "ansible" do |ansible|
            ansible.playbook = "kubernetes-setup/master-playbook.yml"
            ansible.extra_vars = {
                node_ip: "192.168.50.10",
            }
        end
    end

    (1..N).each do |i|
        config.vm.define "node-#{i}" do |node|
            node.vm.box = IMAGE_NAME
            node.vm.network "private_network", ip: "192.168.50.#{i + 10}"
            node.vm.hostname = "node-#{i}"
            node.vm.provision "ansible" do |ansible|
                ansible.playbook = "kubernetes-setup/node-playbook.yml"
                ansible.extra_vars = {
                    node_ip: "192.168.50.#{i + 10}",
                }
            end
        end
    end
end

---
- hosts: all
  become: true
  tasks:
  - name: Install packages that allow apt to be used over HTTPS
    apt:
      name: "{{ packages }}"
      state: present
      update_cache: yes
    vars:
      packages:
      - apt-transport-https
      - ca-certificates
      - curl
      - gnupg-agent
      - software-properties-common

  - name: Add an apt signing key for Docker
    apt_key:
      url: https://download.docker.com/linux/ubuntu/gpg
      state: present

  - name: Add apt repository for stable version
    apt_repository:
      repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu xenial stable
      state: present

  - name: Install docker and its dependecies
    apt: 
      name: "{{ packages }}"
      state: present
      update_cache: yes
    vars:
      packages:
      - docker-ce 
      - docker-ce-cli 
      - containerd.io
    notify:
      - docker status

  - name: Add vagrant user to docker group
    user:
      name: vagrant
      group: docker

  - name: Remove swapfile from /etc/fstab
    mount:
      name: "{{ item }}"
      fstype: swap
      state: absent
    with_items:
      - swap
      - none

  - name: Disable swap
    command: swapoff -a
    when: ansible_swaptotal_mb > 0

  - name: Add an apt signing key for Kubernetes
    apt_key:
      url: https://packages.cloud.google.com/apt/doc/apt-key.gpg
      state: present

  - name: Adding apt repository for Kubernetes
    apt_repository:
      repo: deb https://apt.kubernetes.io/ kubernetes-xenial main
      state: present
      filename: kubernetes.list

  - name: Install Kubernetes binaries
    apt: 
      name: "{{ packages }}"
      state: present
      update_cache: yes
    vars:
      packages:
        - kubelet 
        - kubeadm 
        - kubectl

  - name: Configure node ip
    lineinfile:
      path: /etc/default/kubelet
      line: KUBELET_EXTRA_ARGS=--node-ip={{ node_ip }}

  - name: Restart kubelet
    service:
      name: kubelet
      daemon_reload: yes
      state: restarted

  - name: Initialize the Kubernetes cluster using kubeadm
    command: kubeadm init --apiserver-advertise-address="192.168.50.10" --apiserver-cert-extra-sans="192.168.50.10"  --node-name k8s-master --pod-network-cidr=192.168.0.0/16

  - name: Setup kubeconfig for vagrant user
    command: "{{ item }}"
    with_items:
     - mkdir -p /home/vagrant/.kube
     - cp -i /etc/kubernetes/admin.conf /home/vagrant/.kube/config
     - chown vagrant:vagrant /home/vagrant/.kube/config

  - name: Install calico pod network
    become: false
    command: kubectl create -f https://docs.projectcalico.org/v3.4/getting-started/kubernetes/installation/hosted/calico.yaml

  - name: Generate join command
    command: kubeadm token create --print-join-command
    register: join_command

  - name: Copy join command to local file
    local_action: copy content="{{ join_command.stdout_lines[0] }}" dest="./join-command"

  handlers:
    - name: docker status
      service: name=docker state=started

  - name: Copy the join command to server location
    copy: src=join-command dest=/tmp/join-command.sh mode=0777

  - name: Join the node to cluster
    command: sh /tmp/join-command.sh

$ cd /path/to/Vagrantfile
$ vagrant up

$ ## Accessing master
$ vagrant ssh k8s-master
vagrant@k8s-master:~$ kubectl get nodes
NAME         STATUS   ROLES    AGE     VERSION
k8s-master   Ready    master   18m     v1.13.3
node-1       Ready    <none>   12m     v1.13.3
node-2       Ready    <none>   6m22s   v1.13.3

$ ## Accessing nodes
$ vagrant ssh node-1
$ vagrant ssh node-2

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: my-pvc
spec:
  accessModes:
    - ReadWriteMany
  volumeMode: Block
  storageClassName: my-sc
  resources:
    requests:
    storage: 1Gi

apiVersion: v1
kind: Pod
metadata:
  name: my-pod
spec:
  containers:
    - name: my-container
      image: busybox
      command:
        - sleep
        - “3600”
      volumeDevices:
        - devicePath: /dev/block
          name: my-volume
      imagePullPolicy: IfNotPresent
  volumes:
    - name: my-volume
      persistentVolumeClaim:
        claimName: my-pvc

apiVersion: "etcd.database.coreos.com/v1beta2"
kind: "EtcdCluster"
metadata:
  name: "my-etcd-cluster"
spec:
  size: 3
  version: "3.3.12"

kind: Service
apiVersion: v1
metadata:
  name: my-service
  annotations:
    getambassador.io/config: |
      ---
        apiVersion: ambassador/v0
        kind:  Mapping
        name:  my_service_mapping
        prefix: /my-service/
        service: my-service
spec:
  selector:
    app: MyApp
  ports:
  - protocol: TCP
    port: 80
    targetPort: 9376

---
apiVersion: v1
kind: Pod
metadata:
  name: run-as-uid-1000
spec:
  securityContext:
    runAsUser: 1000
  # ...

---
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
  name: non-root
spec:
  privileged: false
  allowPrivilegeEscalation: false
  runAsUser:
    # Require the container to run without root privileges.
    rule: 'MustRunAsNonRoot'

$ kubectl create -f ./examples/kubernetes/demo-defaultsnapshotclass.yaml
$ kubectl create -f ./examples/kubernetes/demo-snapshot.yaml
$ kubectl get volumesnapshots demo-snapshot-podpvc -o yaml
apiVersion: snapshot.storage.k8s.io/v1alpha1
kind: VolumeSnapshot
metadata:
  creationTimestamp: "2018-11-27T23:57:09Z"
...
spec:
  snapshotClassName: default-snapshot-class
  snapshotContentName: snapcontent-26cd0db3-f2a0-11e8-8be6-42010a800002
  source:
    apiGroup: null
    kind: PersistentVolumeClaim
    name: podpvc
status:
…
$ kubectl get volumesnapshotcontent snapcontent-26cd0db3-f2a0-11e8-8be6-42010a800002 -o yaml
apiVersion: snapshot.storage.k8s.io/v1alpha1
kind: VolumeSnapshotContent
…
spec:
  csiVolumeSnapshotSource:
    creationTime: 1546469777852000000
    driver: pd.csi.storage.gke.io
    restoreSize: 6442450944
    snapshotHandle: projects/jing-k8s-dev/global/snapshots/snapshot-26cd0db3-f2a0-11e8-8be6-42010a800002
  deletionPolicy: Delete
  persistentVolumeRef:
    apiVersion: v1
    kind: PersistentVolume
    name: pvc-853622a4-f28b-11e8-8be6-42010a800002
    resourceVersion: "21117"
    uid: ae400e9f-f28b-11e8-8be6-42010a800002
  snapshotClassName: default-snapshot-class
  volumeSnapshotRef:
    apiVersion: snapshot.storage.k8s.io/v1alpha1
    kind: VolumeSnapshot
    name: demo-snapshot-podpvc
    namespace: default
    resourceVersion: "6948065"
    uid: 26cd0db3-f2a0-11e8-8be6-42010a800002

$ kubectl patch volumesnapshotcontent snapcontent-26cd0db3-f2a0-11e8-8be6-42010a800002 -p '{"spec":{"deletionPolicy":"Retain"}}' --type=merge

$ kubectl get volumesnapshotcontent snapcontent-26cd0db3-f2a0-11e8-8be6-42010a800002 -o yaml
apiVersion: snapshot.storage.k8s.io/v1alpha1
kind: VolumeSnapshotContent
...
spec:
  csiVolumeSnapshotSource:
...
  deletionPolicy: Retain
  persistentVolumeRef:
    apiVersion: v1
    kind: PersistentVolume
    name: pvc-853622a4-f28b-11e8-8be6-42010a800002
...

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: fast-storage
provisioner: csi-driver.example.com
parameters:
  type: pd-ssd
  csi.storage.k8s.io/provisioner-secret-name: mysecret
  csi.storage.k8s.io/provisioner-secret-namespace: mynamespace

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: my-request-for-storage
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi
  storageClassName: fast-storage

apiVersion: v1
kind: PersistentVolume
metadata:
  name: my-manually-created-pv
spec:
  capacity:
    storage: 5Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  csi:
    driver: csi-driver.example.com
    volumeHandle: existingVolumeName
    readOnly: false
    fsType: ext4
    volumeAttributes:
      foo: bar
    controllerPublishSecretRef:
      name: mysecret1
      namespace: mynamespace
    nodeStageSecretRef:
      name: mysecret2
      namespace: mynamespace
    nodePublishSecretRef
      name: mysecret3
      namespace: mynamespace

kind: Pod
apiVersion: v1
metadata:
  name: my-pod
spec:
  containers:
    - name: my-frontend
      image: nginx
      volumeMounts:
      - mountPath: "/var/www/html"
        name: my-csi-volume
  volumes:
    - name: my-csi-volume
      persistentVolumeClaim:
        claimName: my-request-for-storage

KUBECTL_EXTERNAL_DIFF=meld kubectl diff -f some-resources.yaml

/language ko

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: topology-aware-standard
provisioner: kubernetes.io/gce-pd
volumeBindingMode: WaitForFirstConsumer
parameters:
  type: pd-standard

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: web
spec:   
  serviceName: "nginx"
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
            - matchExpressions:
              - key: failure-domain.beta.kubernetes.io/zone
                operator: In
                values:
                - us-central1-a
                - us-central1-f
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
          - labelSelector:
              matchExpressions:
              - key: app
                operator: In
                values:
                - nginx
            topologyKey: failure-domain.beta.kubernetes.io/zone
      containers:
      - name: nginx
        image: gcr.io/google_containers/nginx-slim:0.8
        ports:
        - containerPort: 80
          name: web
        volumeMounts:
        - name: www
          mountPath: /usr/share/nginx/html
        - name: logs
          mountPath: /logs
 volumeClaimTemplates:
  - metadata:
      name: www
    spec:
      accessModes: [ "ReadWriteOnce" ]
      storageClassName: topology-aware-standard
      resources:
        requests:
          storage: 10Gi
  - metadata:
      name: logs
    spec:
      accessModes: [ "ReadWriteOnce" ]
      storageClassName: topology-aware-standard
      resources:
        requests:
          storage: 1Gi

$ kubectl get pv -o=jsonpath='{range .items[*]}{.spec.claimRef.name}{"\t"}{.metadata.labels.failure\-domain\.beta\.kubernetes\.io/zone}{"\n"}{end}'
www-web-0       us-central1-f
logs-web-0      us-central1-f
www-web-1       us-central1-a
logs-web-1      us-central1-a

type PersistentVolumeClaimSpec struct {
	AccessModes []PersistentVolumeAccessMode
	Selector *metav1.LabelSelector
	Resources ResourceRequirements
	VolumeName string
	StorageClassName *string
	VolumeMode *PersistentVolumeMode
	DataSource *TypedLocalObjectReference
}

apiVersion: snapshot.storage.k8s.io/v1alpha1
kind: VolumeSnapshotClass
metadata:
  name: default-snapclass
  annotations:
    snapshot.storage.kubernetes.io/is-default-class: "true"
snapshotter: com.example.csi-driver


apiVersion: snapshot.storage.k8s.io/v1alpha1
kind: VolumeSnapshotClass
metadata:
  name: csi-snapclass
snapshotter: com.example.csi-driver
parameters:
  fakeSnapshotOption: foo
  csiSnapshotterSecretName: csi-secret
  csiSnapshotterSecretNamespace: csi-namespace

apiVersion: snapshot.storage.k8s.io/v1alpha1
kind: VolumeSnapshot
metadata:
  name: new-snapshot-demo
  namespace: demo-namespace
spec:
  snapshotClassName: csi-snapclass
  source:
    name: mypvc
    kind: PersistentVolumeClaim

apiVersion: snapshot.storage.k8s.io/v1alpha1
kind: VolumeSnapshotContent
metadata:
  name: static-snapshot-content
spec:
  csiVolumeSnapshotSource:
    driver: com.example.csi-driver
    snapshotHandle: snapshotcontent-example-id
  volumeSnapshotRef:
    kind: VolumeSnapshot
    name: static-snapshot-demo
    namespace: demo-namespace

apiVersion: snapshot.storage.k8s.io/v1alpha1
kind: VolumeSnapshot
metadata:
  name: static-snapshot-demo
  namespace: demo-namespace
spec:
  snapshotClassName: csi-snapclass
  snapshotContentName: static-snapshot-content

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc-restore
  Namespace: demo-namespace
spec:
  storageClassName: csi-storageclass
  dataSource:
    name: new-snapshot-demo
    kind: VolumeSnapshot
    apiGroup: snapshot.storage.k8s.io
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

acs-engine deploy --subscription-id <subscription id> \
    --dns-prefix <dns> --location <location> \
    --api-model examples/kubernetes.json

$ kubectl get nodes
NAME                                 STATUS    ROLES     AGE       VERSION
k8s-agentpool1-92998111-vmss000000   Ready     agent     1h        v1.12.0-rc.2
k8s-agentpool1-92998111-vmss000001   Ready     agent     1h        v1.12.0-rc.2
k8s-master-92998111-0                Ready     master    1h        v1.12.0-rc.2

$ az vmss list -o table -g k8sblogkk1
Name                          ResourceGroup    Location    Zones      Capacity  Overprovision    UpgradePolicy
----------------------------  ---------------  ----------  -------  ----------  ---------------  ---------------
k8s-agentpool1-92998111-vmss  k8sblogkk1       westus2                       2  False            Manual

$ az vmss list-instances -g k8sblogkk1 -n k8s-agentpool1-92998111-vmss -o table
  InstanceId  LatestModelApplied    Location    Name                            ProvisioningState    ResourceGroup    VmId
------------  --------------------  ----------  ------------------------------  -------------------  ---------------  ------------------------------------
           0  True                  westus2     k8s-agentpool1-92998111-vmss_0  Succeeded            K8SBLOGKK1       21c57d6c-9c8f-4a62-970f-63ed0fcba53f
           1  True                  westus2     k8s-agentpool1-92998111-vmss_1  Succeeded            K8SBLOGKK1       840743b9-0076-4a2e-920e-5ba9da296665

$  kubectl describe nodes k8s-agentpool1-92998111-vmss000000| grep ProviderID
ProviderID:                  azure:///subscriptions/<subscription id>/resourceGroups/k8sblogkk1/providers/Microsoft.Compute/virtualMachineScaleSets/k8s-agentpool1-92998111-vmss/virtualMachines/0

acs-engine deploy --subscription-id <subscription id> \
    --dns-prefix <dns> --location <location> \
    --api-model examples/kubernetes.json

"addons": [
          {
            "name": "cluster-autoscaler",
            "enabled": true,
            "config": {
              "minNodes": "1",
              "maxNodes": "5"
            }
          }
        ]

$kubectl get pods -n kube-system  | grep autoscaler
cluster-autoscaler-7bdc74d54c-qvbjs             1/1       Running             1          6m

$kubectl -n kube-system describe configmap cluster-autoscaler-status
Name:         cluster-autoscaler-status
Namespace:    kube-system
Labels:       <none>
Annotations:  cluster-autoscaler.kubernetes.io/last-updated=2018-10-02 01:21:17.850010508 +0000 UTC

Data
====
status:
----
Cluster-autoscaler status at 2018-10-02 01:21:17.850010508 +0000 UTC:
Cluster-wide:
  Health:      Healthy (ready=3 unready=0 notStarted=0 longNotStarted=0 registered=3 longUnregistered=0)
               LastProbeTime:      2018-10-02 01:21:17.772229859 +0000 UTC m=+3161.412682204
               LastTransitionTime: 2018-10-02 00:28:49.944222739 +0000 UTC m=+13.584675084
  ScaleUp:     NoActivity (ready=3 registered=3)
               LastProbeTime:      2018-10-02 01:21:17.772229859 +0000 UTC m=+3161.412682204
               LastTransitionTime: 2018-10-02 00:28:49.944222739 +0000 UTC m=+13.584675084
  ScaleDown:   NoCandidates (candidates=0)
               LastProbeTime:      2018-10-02 01:21:17.772229859 +0000 UTC m=+3161.412682204
               LastTransitionTime: 2018-10-02 00:39:50.493307405 +0000 UTC m=+674.133759650

NodeGroups:
  Name:        k8s-agentpool1-92998111-vmss
  Health:      Healthy (ready=2 unready=0 notStarted=0 longNotStarted=0 registered=2 longUnregistered=0 cloudProviderTarget=2 (minSize=1, maxSize=5))
               LastProbeTime:      2018-10-02 01:21:17.772229859 +0000 UTC m=+3161.412682204
               LastTransitionTime: 2018-10-02 00:28:49.944222739 +0000 UTC m=+13.584675084
  ScaleUp:     NoActivity (ready=2 cloudProviderTarget=2)
               LastProbeTime:      2018-10-02 01:21:17.772229859 +0000 UTC m=+3161.412682204
               LastTransitionTime: 2018-10-02 00:28:49.944222739 +0000 UTC m=+13.584675084
  ScaleDown:   NoCandidates (candidates=0)
               LastProbeTime:      2018-10-02 01:21:17.772229859 +0000 UTC m=+3161.412682204
               LastTransitionTime: 2018-10-02 00:39:50.493307405 +0000 UTC m=+674.133759650


Events:
  Type    Reason          Age   From                Message
  ----    ------          ----  ----                -------
  Normal  ScaleDownEmpty  42m   cluster-autoscaler  Scale-down: removing empty node k8s-agentpool1-92998111-vmss000002

adal.NewServicePrincipalTokenFromMSIWithUserAssignedID(msiEndpoint,
env.ServiceManagementEndpoint,
config.UserAssignedIdentityID)

acs-engine deploy --subscription-id <subscription id> \
    --dns-prefix <dns> --location <location> \
    --api-model examples/kubernetes-msi-userassigned/kube-vmss.json

"useManagedIdentity": true
"userAssignedID": "acsenginetestid"

git clone http://<userid>@github.com/bluek8s/kubedirector.

~> cat kubedirector/deploy/example_catalog/cr-app-spark221e2.json
{
   "apiVersion": "kubedirector.bluedata.io/v1alpha1",
   "kind": "KubeDirectorApp",
   "metadata": {
       "name" : "spark221e2"
   },
   "spec" : {
       "systemctlMounts": true,
       "config": {
           "node_services": [
               {
                   "service_ids": [
                       "ssh",
                       "spark",
                       "spark_master",
                       "spark_worker"
                   ],
…

~> cat kubedirector/deploy/example_clusters/cr-cluster-spark221.e1.yaml
apiVersion: "kubedirector.bluedata.io/v1alpha1"
kind: "KubeDirectorCluster"
metadata:
  name: "spark221e2"
spec:
  app: spark221e2
  roles:
  - name: controller
    replicas: 1
    resources:
      requests:
        memory: "4Gi"
        cpu: "2"
      limits:
        memory: "4Gi"
        cpu: "2"
  - name: worker
    replicas: 2
    resources:
      requests:
        memory: "4Gi"
        cpu: "2"
      limits:
        memory: "4Gi"
        cpu: "2"
  - name: jupyter
…

~> kubectl version
Client Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.3", GitCommit:"a4529464e4629c21224b3d52edfe0ea91b072862", GitTreeState:"clean", BuildDate:"2018-09-09T18:02:47Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.3", GitCommit:"a4529464e4629c21224b3d52edfe0ea91b072862", GitTreeState:"clean", BuildDate:"2018-09-09T17:53:03Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"linux/amd64"}                                    

cd kubedirector
make deploy

~> kubectl get pods
NAME                           READY     STATUS     RESTARTS     AGE
kubedirector-58cf59869-qd9hb   1/1       Running    0            1m     

~> kubectl get KubeDirectorApp
NAME           AGE
cassandra311   30m
spark211up     30m
spark221e2     30m

~> kubectl get pods
NAME                             READY     STATUS    RESTARTS   AGE
kubedirector-58cf59869-djdwl     1/1       Running   0          19m
spark221e2-controller-zbg4d-0    1/1       Running   0          23m
spark221e2-jupyter-2km7q-0       1/1       Running   0          23m
spark221e2-worker-4gzbz-0        1/1       Running   0          23m
spark221e2-worker-4gzbz-1        1/1       Running   0          23m

~> kubectl get service
NAME                                TYPE         CLUSTER-IP        EXTERNAL-IP    PORT(S)                                                    AGE
kubedirector                        ClusterIP    10.98.234.194     <none>         60000/TCP                                                  1d
kubernetes                          ClusterIP    10.96.0.1         <none>         443/TCP                                                    1d
svc-spark221e2-5tg48                ClusterIP    None              <none>         8888/TCP                                                   21s
svc-spark221e2-controller-tq8d6-0   NodePort     10.104.181.123    <none>         22:30534/TCP,8080:31533/TCP,7077:32506/TCP,8081:32099/TCP  20s
svc-spark221e2-jupyter-6989v-0      NodePort     10.105.227.249    <none>         22:30632/TCP,8888:30355/TCP                                20s
svc-spark221e2-worker-d9892-0       NodePort     10.107.131.165    <none>         22:30358/TCP,8081:32144/TCP                                20s
svc-spark221e2-worker-d9892-1       NodePort     10.110.88.221     <none>         22:30294/TCP,8081:31436/TCP                                20s

kubectl create -f deploy/example_clusters/cr-cluster-cassandra311.yaml

~> kubectl get pods
NAME                              READY     STATUS    RESTARTS   AGE
cassandra311-seed-v24r6-0         1/1       Running   0          1m
cassandra311-seed-v24r6-1         1/1       Running   0          1m
cassandra311-worker-rqrhl-0       1/1       Running   0          1m
cassandra311-worker-rqrhl-1       1/1       Running   0          1m
kubedirector-58cf59869-djdwl      1/1       Running   0          1d
spark221e2-controller-tq8d6-0     1/1       Running   0          22m
spark221e2-jupyter-6989v-0        1/1       Running   0          22m
spark221e2-worker-d9892-0         1/1       Running   0          22m
spark221e2-worker-d9892-1         1/1       Running   0          22m

~> kubectl get service
NAME                                TYPE         CLUSTER-IP       EXTERNAL-IP   PORT(S)                                                   AGE
kubedirector                        ClusterIP    10.98.234.194    <none>        60000/TCP                                                 1d
kubernetes                          ClusterIP    10.96.0.1        <none>        443/TCP                                                   1d
svc-cassandra311-seed-v24r6-0       NodePort     10.96.94.204     <none>        22:31131/TCP,9042:30739/TCP                               3m
svc-cassandra311-seed-v24r6-1       NodePort     10.106.144.52    <none>        22:30373/TCP,9042:32662/TCP                               3m
svc-cassandra311-vhh29              ClusterIP    None             <none>        8888/TCP                                                  3m
svc-cassandra311-worker-rqrhl-0     NodePort     10.109.61.194    <none>        22:31832/TCP,9042:31962/TCP                               3m
svc-cassandra311-worker-rqrhl-1     NodePort     10.97.147.131    <none>        22:31454/TCP,9042:31170/TCP                               3m
svc-spark221e2-5tg48                ClusterIP    None             <none>        8888/TCP                                                  24m
svc-spark221e2-controller-tq8d6-0   NodePort     10.104.181.123   <none>        22:30534/TCP,8080:31533/TCP,7077:32506/TCP,8081:32099/TCP 24m
svc-spark221e2-jupyter-6989v-0      NodePort     10.105.227.249   <none>        22:30632/TCP,8888:30355/TCP                               24m
svc-spark221e2-worker-d9892-0       NodePort     10.107.131.165   <none>        22:30358/TCP,8081:32144/TCP                               24m
svc-spark221e2-worker-d9892-1       NodePort     10.110.88.221    <none>        22:30294/TCP,8081:31436/TCP                               24m

ltsp-base
(install basic LTSP server software)
   |
   |---basesystem
   |   (prepare chroot with main software and kernel)
   |     |
   |     |---builder
   |     |   (build additional software from sources, if needed)
   |     |
   |     '---ltsp-image
   |         (install additional software, docker, kubelet and build squashed image)
   |
   '---final-stage
       (copy squashed image, kernel and initramfs into first stage)

FROM ubuntu:16.04 as ltsp-base

ADD nbd-server-wrapper.sh /bin/
ADD /patches/feature-grub.diff /patches/feature-grub.diff
RUN apt-get -y update \
 && apt-get -y install \
      ltsp-server \
      tftpd-hpa \
      nbd-server \
      grub-common \
      grub-pc-bin \
      grub-efi-amd64-bin \
      curl \
      patch \
 && sed -i 's|in_target mount|in_target_nofail mount|' \
      /usr/share/debootstrap/functions \
  # Add EFI support and Grub bootloader (#1745251)
 && patch -p2 -d /usr/sbin < /patches/feature-grub.diff \
 && rm -rf /var/lib/apt/lists \
 && apt-get clean

FROM ltsp-base as basesystem

ARG DEBIAN_FRONTEND=noninteractive

# Prepare base system
RUN debootstrap --arch amd64 xenial /opt/ltsp/amd64

# Install updates
RUN echo "\
      deb http://archive.ubuntu.com/ubuntu xenial main restricted universe multiverse\n\
      deb http://archive.ubuntu.com/ubuntu xenial-updates main restricted universe multiverse\n\
      deb http://archive.ubuntu.com/ubuntu xenial-security main restricted universe multiverse" \
      > /opt/ltsp/amd64/etc/apt/sources.list \
 && ltsp-chroot apt-get -y update \
 && ltsp-chroot apt-get -y upgrade

# Installing LTSP-packages
RUN ltsp-chroot apt-get -y install ltsp-client-core

# Apply initramfs patches
# 1: Read params from /etc/lts.conf during the boot (#1680490)
# 2: Add support for PREINIT variables in lts.conf
ADD /patches /patches
RUN patch -p4 -d /opt/ltsp/amd64/usr/share < /patches/feature_initramfs_params_from_lts_conf.diff \
 && patch -p3 -d /opt/ltsp/amd64/usr/share < /patches/feature_preinit.diff

# Write new local client config for boot NBD image to ram:
RUN echo "[Default]\nLTSP_NBD_TO_RAM = true" \
      > /opt/ltsp/amd64/etc/lts.conf

# Install packages
RUN echo 'APT::Install-Recommends "0";\nAPT::Install-Suggests "0";' \
      >> /opt/ltsp/amd64/etc/apt/apt.conf.d/01norecommend \
 && ltsp-chroot apt-get -y install \
      software-properties-common \
      apt-transport-https \
      ca-certificates \
      ssh \
      bridge-utils \
      pv \
      jq \
      vlan \
      bash-completion \
      screen \
      vim \
      mc \
      lm-sensors \
      htop \
      jnettop \
      rsync \
      curl \
      wget \
      tcpdump \
      arping \
      apparmor-utils \
      nfs-common \
      telnet \
      sysstat \
      ipvsadm \
      ipset \
      make

# Install kernel
RUN ltsp-chroot apt-get -y install linux-generic-hwe-16.04

FROM basesystem as builder

# Set cpuinfo (for building from sources)
RUN cp /proc/cpuinfo /opt/ltsp/amd64/proc/cpuinfo

# Compile Mellanox driver
RUN ltsp-chroot sh -cx \
   '  VERSION=4.3-1.0.1.0-ubuntu16.04-x86_64 \
   && curl -L http://www.mellanox.com/downloads/ofed/MLNX_EN-${VERSION%%-ubuntu*}/mlnx-en-${VERSION}.tgz \
      | tar xzf - \
   && export \
        DRIVER_DIR="$(ls -1 | grep "MLNX_OFED_LINUX-\|mlnx-en-")" \
        KERNEL="$(ls -1t /lib/modules/ | head -n1)" \
   && cd "$DRIVER_DIR" \
   && ./*install --kernel "$KERNEL" --without-dkms --add-kernel-support \
   && cd - \
   && rm -rf "$DRIVER_DIR" /tmp/mlnx-en* /tmp/ofed*'

# Save kernel modules
RUN ltsp-chroot sh -c \
    ' export KERNEL="$(ls -1t /usr/src/ | grep -m1 "^linux-headers" | sed "s/^linux-headers-//g")" \
   && tar cpzf /modules.tar.gz /lib/modules/${KERNEL}/updates'

FROM basesystem as ltsp-image

# Retrieve kernel modules
COPY --from=builder /opt/ltsp/amd64/modules.tar.gz /opt/ltsp/amd64/modules.tar.gz

# Install kernel modules
RUN ltsp-chroot sh -c \
    ' export KERNEL="$(ls -1t /usr/src/ | grep -m1 "^linux-headers" | sed "s/^linux-headers-//g")" \
   && tar xpzf /modules.tar.gz \
   && depmod -a "${KERNEL}" \
   && rm -f /modules.tar.gz'

# Install docker
RUN ltsp-chroot sh -c \
   '  curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add - \
   && echo "deb https://download.docker.com/linux/ubuntu xenial stable" \
        > /etc/apt/sources.list.d/docker.list \
   && apt-get -y update \
   && apt-get -y install \
        docker-ce=$(apt-cache madison docker-ce | grep 18.06 | head -1 | awk "{print $ 3}")'

# Configure docker options
RUN DOCKER_OPTS="$(echo \
      --storage-driver=overlay2 \
      --iptables=false \
      --ip-masq=false \
      --log-driver=json-file \
      --log-opt=max-size=10m \
      --log-opt=max-file=5 \
      )" \
 && sed "/^ExecStart=/ s|$| $DOCKER_OPTS|g" \
      /opt/ltsp/amd64/lib/systemd/system/docker.service \
      > /opt/ltsp/amd64/etc/systemd/system/docker.service

# Install kubeadm, kubelet and kubectl
RUN ltsp-chroot sh -c \
      '  curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add - \
      && echo "deb http://apt.kubernetes.io/ kubernetes-xenial main" \
           > /etc/apt/sources.list.d/kubernetes.list \
      && apt-get -y update \
      && apt-get -y install kubelet kubeadm kubectl cri-tools'

# Disable automatic updates
RUN rm -f /opt/ltsp/amd64/etc/apt/apt.conf.d/20auto-upgrades

# Disable apparmor profiles
RUN ltsp-chroot find /etc/apparmor.d \
      -maxdepth 1 \
      -type f \
      -name "sbin.*" \
      -o -name "usr.*" \
      -exec ln -sf "{}" /etc/apparmor.d/disable/ \;

# Write kernel cmdline options
RUN KERNEL_OPTIONS="$(echo \
      init=/sbin/init-ltsp \
      forcepae \
      console=tty1 \
      console=ttyS0,9600n8 \
      nvme_core.default_ps_max_latency_us=0 \
    )" \
 && sed -i "/^CMDLINE_LINUX_DEFAULT=/ s|=.*|=\"${KERNEL_OPTIONS}\"|" \
      "/opt/ltsp/amd64/etc/ltsp/update-kernels.conf"

# Cleanup caches
RUN rm -rf /opt/ltsp/amd64/var/lib/apt/lists \
 && ltsp-chroot apt-get clean

# Build squashed image
RUN ltsp-update-image

FROM ltsp-base
COPY --from=ltsp-image /opt/ltsp/images /opt/ltsp/images
COPY --from=ltsp-image /etc/nbd-server/conf.d /etc/nbd-server/conf.d
COPY --from=ltsp-image /var/lib/tftpboot /var/lib/tftpboot

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: ltsp-server
  labels:
      app: ltsp-server
spec:
  selector:
    matchLabels:
      name: ltsp-server
  replicas: 1
  template:
    metadata:
      labels:
        name: ltsp-server
    spec:
      hostNetwork: true
      containers:
      - name: tftpd
        image: registry.example.org/example/ltsp:latest
        command: [ "/usr/sbin/in.tftpd", "-L", "-u", "tftp", "-a", ":69", "-s", "/var/lib/tftpboot" ]
        lifecycle:
          postStart:
            exec:
              command: ["/bin/sh", "-c", "cd /var/lib/tftpboot/ltsp/amd64; ln -sf config/lts.conf ." ]
        volumeMounts:
        - name: config
          mountPath: "/var/lib/tftpboot/ltsp/amd64/config"

      - name: nbd-server
        image: registry.example.org/example/ltsp:latest
        command: [ "/bin/nbd-server-wrapper.sh" ]

      volumes:
      - name: config
        configMap:
          name: ltsp-config

apiVersion: v1
kind: ConfigMap
metadata:
  name: ltsp-config
data:
  lts.conf: |
    [default]
    KEEP_SYSTEM_SERVICES           = "ssh ureadahead dbus-org.freedesktop.login1 systemd-logind polkitd cgmanager ufw rpcbind nfs-kernel-server"

    PREINIT_00_TIME                = "ln -sf /usr/share/zoneinfo/Europe/Prague /etc/localtime"
    PREINIT_01_FIX_HOSTNAME        = "sed -i '/^127.0.0.2/d' /etc/hosts"
    PREINIT_02_DOCKER_OPTIONS      = "sed -i 's|^ExecStart=.*|ExecStart=/usr/bin/dockerd -H fd:// --storage-driver overlay2 --iptables=false --ip-masq=false --log-driver=json-file --log-opt=max-size=10m --log-opt=max-file=5|' /etc/systemd/system/docker.service"

    FSTAB_01_SSH                   = "/dev/data/ssh     /etc/ssh          ext4 nofail,noatime,nodiratime 0 0"
    FSTAB_02_JOURNALD              = "/dev/data/journal /var/log/journal  ext4 nofail,noatime,nodiratime 0 0"
    FSTAB_03_DOCKER                = "/dev/data/docker  /var/lib/docker   ext4 nofail,noatime,nodiratime 0 0"

    # Each command will stop script execution when fail
    RCFILE_01_SSH_SERVER           = "cp /rofs/etc/ssh/*_config /etc/ssh; ssh-keygen -A"
    RCFILE_02_SSH_CLIENT           = "mkdir -p /root/.ssh/; echo 'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDBSLYRaORL2znr1V4a3rjDn3HDHn2CsvUNK1nv8+CctoICtJOPXl6zQycI9KXNhANfJpc6iQG1ZPZUR74IiNhNIKvOpnNRPyLZ5opm01MVIDIZgi9g0DUks1g5gLV5LKzED8xYKMBmAfXMxh/nsP9KEvxGvTJB3OD+/bBxpliTl5xY3Eu41+VmZqVOz3Yl98+X8cZTgqx2dmsHUk7VKN9OZuCjIZL9MtJCZyOSRbjuo4HFEssotR1mvANyz+BUXkjqv2pEa0I2vGQPk1VDul5TpzGaN3nOfu83URZLJgCrX+8whS1fzMepUYrbEuIWq95esjn0gR6G4J7qlxyguAb9 admin@kubernetes' >> /root/.ssh/authorized_keys"
    RCFILE_03_KERNEL_DEBUG         = "sysctl -w kernel.unknown_nmi_panic=1 kernel.softlockup_panic=1; modprobe netconsole netconsole=@/vmbr0,@10.9.0.15/"
    RCFILE_04_SYSCTL               = "sysctl -w fs.file-max=20000000 fs.nr_open=20000000 net.ipv4.neigh.default.gc_thresh1=80000 net.ipv4.neigh.default.gc_thresh2=90000 net.ipv4.neigh.default.gc_thresh3=100000"
    RCFILE_05_FORWARD              = "echo 1 > /proc/sys/net/ipv4/ip_forward"
    RCFILE_06_MODULES              = "modprobe br_netfilter"
    RCFILE_07_JOIN_K8S             = "kubeadm join --token 2a4576.504356e45fa3d365 10.9.0.20:6443 --discovery-token-ca-cert-hash sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"

shared-network ltsp-network {
    subnet 10.9.0.0 netmask 255.255.0.0 {
        authoritative;
        default-lease-time -1;
        max-lease-time -1;

        option domain-name              "example.org";
        option domain-name-servers      10.9.0.1;
        option routers                  10.9.0.1;
        next-server                     ltsp-1;  # write LTSP-server hostname here

        if option architecture = 00:07 {
            filename "/ltsp/amd64/grub/x86_64-efi/core.efi";
        } else {
            filename "/ltsp/amd64/grub/i386-pc/core.0";
        }

        range 10.9.200.0 10.9.250.254; 
    }

Client version: v2.0
Server version: unavailable

service Controller {
 rpc CreateVolume (CreateVolumeRequest)
   returns (CreateVolumeResponse) {}
……
 rpc RequiresFSResize (RequiresFSResizeRequest)
   returns (RequiresFSResizeResponse) {}
 rpc ControllerResizeVolume (ControllerResizeVolumeRequest)
   returns (ControllerResizeVolumeResponse) {}
}

service Node {
 rpc NodeStageVolume (NodeStageVolumeRequest)
   returns (NodeStageVolumeResponse) {}
……
 rpc NodeResizeVolume (NodeResizeVolumeRequest)
   returns (NodeResizeVolumeResponse) {}
}

type ExpandableVolumePlugin interface {
VolumePlugin
ExpandVolumeDevice(spec Spec, newSize resource.Quantity, oldSize resource.Quantity) (resource.Quantity, error)
RequiresFSResize() bool
}

allowVolumeExpansion: true
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: csi-qcfs
parameters:
  csiProvisionerSecretName: orain-test
  csiProvisionerSecretNamespace: default
provisioner: csi-qcfsplugin
reclaimPolicy: Delete
volumeBindingMode: Immediate

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: qcfs-pvc
  namespace: default
....
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 300Gi
  storageClassName: csi-qcfs

$ kubectl create -f my-vm.yaml 
Error from server: error when creating "my-vm.yaml": admission webhook "virtualmachine-validator.kubevirt.io" denied the request: spec.template.spec.domain.devices.disks[0].volumeName 'registryvolume' not found.

apiVersion: v1
kind: Pod
metadata:
  name: exclusive-2
spec:
  containers:
  - image: quay.io/connordoyle/cpuset-visualizer
    name: exclusive-2
    resources:
      # Pod is in the Guaranteed QoS class because requests == limits
      requests:
        # CPU request is an integer
        cpu: 2
        memory: "256M"
      limits:
        cpu: 2
        memory: "256M"

--authorization-mode=RBAC

--no-enable-legacy-authorization

{
  "score": -30,
  "scoring": {
    "critical": [{
      "selector": "containers[] .securityContext .privileged == true",
      "reason": "Privileged containers can allow almost completely unrestricted host access"
    }],
    "advise": [{
      "selector": "containers[] .securityContext .runAsNonRoot == true",
      "reason": "Force the running image to run as a non-root user to ensure least privilege"
    }, {
      "selector": "containers[] .securityContext .capabilities .drop",
      "reason": "Reducing kernel capabilities available to a container limits its attack surface",
      "href": "/docs/tasks/configure-pod-container/security-context/"
    }]
  }
}

#// vim: set ft=python:
def test_for_team_label():
    if spec["kind"] == "Deployment":
        labels = spec["spec"]["template"]["metadata"]["labels"]
        assert_contains(labels, "team", "should indicate which team owns the deployment")

test_for_team_label()

# Required to prevent escalations to root.
allowPrivilegeEscalation: false
runAsUser:
  # Require the container to run without root privileges.
  rule: 'MustRunAsNonRoot'

kind: Service
apiVersion: v1
metadata:
  name: my-service
spec:
  selector:
    app: MyApp
  ports:
  - protocol: TCP
    port: 443
    targetPort: 8443

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: default-deny
spec:
  podSelector:

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: myapp-deny-external-egress
spec:
  podSelector:
    matchLabels:
      app: myapp
  policyTypes:
  - Egress
  egress:
  - ports:
    - port: 53
      protocol: UDP
  - to:
    - namespaceSelector: {}

k8s: # used for Kubernetes pods
  deployment: # only deployments currently supported
    test-frontend: # pod name, defaults to `default` namespace
      test-microservice: 80  # `test-microservice` is the DNS name of the target service
      test-database: -80     # `test-frontend` should not be able to access test-database’s port 80
      169.254.169.254: -80, -443           # AWS metadata API
      metadata.google.internal: -80, -443  # GCP metadata API

    new-namespace:test-microservice:  # `new-namespace` is the namespace name
      test-database.new-namespace: 80 # longer DNS names can be used for other namespaces
      test-frontend.default: 80
      169.254.169.254: -80, -443           # AWS metadata API
      metadata.google.internal: -80, -443  # GCP metadata API

~> cat standard.yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: standard
parameters:
  type: pd-standard
provisioner: kubernetes.io/gce-pd
allowVolumeExpansion: true
reclaimPolicy: Delete

~> kubectl get pvc myclaim -o yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: myclaim
  namespace: default
  uid: 02d4aa83-83cd-11e8-909d-42010af00004
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 14Gi
  storageClassName: standard
  volumeName: pvc-xxx
status:
  capacity:
    storage: 9G
  conditions:
  - lastProbeTime: null
    lastTransitionTime: 2018-07-11T14:51:10Z
    message: Waiting for user to (re-)start a pod to finish file system resize of
      volume on node.
    status: "True"
    type: FileSystemResizePending
  phase: Bound

dnstools# host -t srv headless
headless.default.svc.cluster.local has SRV record 10 33 0 6234396237313665.headless.default.svc.cluster.local.
headless.default.svc.cluster.local has SRV record 10 33 0 6662363165353239.headless.default.svc.cluster.local.
headless.default.svc.cluster.local has SRV record 10 33 0 6338633437303230.headless.default.svc.cluster.local.
dnstools#

dnstools# host -t srv headless
headless.default.svc.cluster.local has SRV record 0 25 443 172-17-0-14.headless.default.svc.cluster.local.
headless.default.svc.cluster.local has SRV record 0 25 443 172-17-0-18.headless.default.svc.cluster.local.
headless.default.svc.cluster.local has SRV record 0 25 443 172-17-0-4.headless.default.svc.cluster.local.
headless.default.svc.cluster.local has SRV record 0 25 443 172-17-0-9.headless.default.svc.cluster.local.

dnstools# host -t srv headless
headless.default.svc.cluster.local has SRV record 0 25 443 headless-65bb4c479f-qv84p.headless.default.svc.cluster.local.
headless.default.svc.cluster.local has SRV record 0 25 443 headless-65bb4c479f-zc8lx.headless.default.svc.cluster.local.
headless.default.svc.cluster.local has SRV record 0 25 443 headless-65bb4c479f-q7lf2.headless.default.svc.cluster.local.
headless.default.svc.cluster.local has SRV record 0 25 443 headless-65bb4c479f-566rt.headless.default.svc.cluster.local.

# kubectl describe svc nginx-service
Name:			nginx-service
...
Type:			ClusterIP
IP:			    10.102.128.4
Port:			http	3080/TCP
Endpoints:		10.244.0.235:8080,10.244.1.237:8080
Session Affinity:	None

# ip addr
...
73: kube-ipvs0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether 1a:ce:f5:5f:c1:4d brd ff:ff:ff:ff:ff:ff
    inet 10.102.128.4/32 scope global kube-ipvs0
       valid_lft forever preferred_lft forever

# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn     
TCP  10.102.128.4:3080 rr
  -> 10.244.0.235:8080            Masq    1      0          0         
  -> 10.244.1.237:8080            Masq    1      0          0   

TCP  10.102.128.4:3080 rr
  -> 10.244.0.235:8080            Masq    1      0          0         
  -> 10.244.1.237:8080            Masq    1      0       

# kubectl describe svc nginx-service
Name:			nginx-service
...
IP:			    10.102.128.4
Port:			http	3080/TCP
Session Affinity:	ClientIP

# ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  10.102.128.4:3080 rr persistent 10800

ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
nf_conntrack_ipv4

from airflow import DAG
from datetime import datetime, timedelta
from airflow.contrib.operators.kubernetes_pod_operator import KubernetesPodOperator
from airflow.operators.dummy_operator import DummyOperator


default_args = {
    'owner': 'airflow',
    'depends_on_past': False,
    'start_date': datetime.utcnow(),
    'email': ['airflow@example.com'],
    'email_on_failure': False,
    'email_on_retry': False,
    'retries': 1,
    'retry_delay': timedelta(minutes=5)
}

dag = DAG(
    'kubernetes_sample', default_args=default_args, schedule_interval=timedelta(minutes=10))


start = DummyOperator(task_id='run_this_first', dag=dag)

passing = KubernetesPodOperator(namespace='default',
                          image="Python:3.6",
                          cmds=["Python","-c"],
                          arguments=["print('hello world')"],
                          labels={"foo": "bar"},
                          name="passing-test",
                          task_id="passing-task",
                          get_logs=True,
                          dag=dag
                          )

failing = KubernetesPodOperator(namespace='default',
                          image="ubuntu:1604",
                          cmds=["Python","-c"],
                          arguments=["print('hello world')"],
                          labels={"foo": "bar"},
                          name="fail",
                          task_id="failing-task",
                          get_logs=True,
                          dag=dag
                          )

passing.set_upstream(start)
failing.set_upstream(start)

production_task = KubernetesPodOperator(namespace='default',
                          # image="my-production-job:release-1.0.1", <-- old release
                          image="my-production-job:release-1.0.2",
                          cmds=["Python","-c"],
                          arguments=["print('hello world')"],
                          name="fail",
                          task_id="failing-task",
                          get_logs=True,
                          dag=dag
                          )

sed -ie "s/KubernetesExecutor/LocalExecutor/g" scripts/ci/kubernetes/kube/configmaps.yaml
./scripts/ci/kubernetes/Docker/build.sh
./scripts/ci/kubernetes/kube/deploy.sh

WEB=$(kubectl get pods -o go-template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end}}' | grep "airflow" | head -1)
kubectl port-forward $WEB 8080:8080

apiVersion: v1
kind: Service
metadata:
  name: httpbin
  annotations:
    getambassador.io/config: |
      ---
      apiVersion: ambassador/v0
      kind:  Mapping
      name:  httpbin_mapping
      prefix: /httpbin/
      service: httpbin.org:80
      host_rewrite: httpbin.org
spec:
  type: ClusterIP
  ports:
    - port: 80

---
apiVersion: ambassador/v0
kind:  Mapping
name: tfserving-mapping-test-post
prefix: /models/test/
rewrite: /model/test/:predict
method: POST
service: test.kubeflow:8000

   commonLabels:
     app: hello
   resources:
   - deployment.yaml
   - configMap.yaml
   - service.yaml

kustomize build

   someapp/
   ├── base/
   │   ├── kustomization.yaml
   │   ├── deployment.yaml
   │   ├── configMap.yaml
   │   └── service.yaml
   └── overlays/
      ├── production/
      │   └── kustomization.yaml
      │   ├── replica_count.yaml
      └── staging/
          ├── kustomization.yaml
          └── cpu_count.yaml

   commonLabels:
    env: production
   bases:
   - ../../base
   patches:
   - replica_count.yaml

   apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: the-deployment
   spec:
     replicas: 100

kustomize build someapp/overlays/production

# kubectl get pods

NAME                                   READY     STATUS        RESTARTS   AGE
virt-controller-7888c64d66-dzc9p   1/1       Running   0          2h
virt-controller-7888c64d66-wm66x   0/1       Running   0          2h
virt-handler-l2xkt                 1/1       Running   0          2h
virt-handler-sztsw                 1/1       Running   0          2h
virt-launcher-testvm-ephemeral-dph94   2/2       Running       0          2h

apiVersion: kubevirt.io/v1alpha1
kind: VirtualMachine
metadata:
  name: myvm
spec:
  terminationGracePeriodSeconds: 5
  domain:
    resources:
      requests:
        memory: 64M
    devices:
      disks:
      - name: registrydisk
        volumeName: registryvolume
        disk:
          bus: virtio
      - name: cloudinitdisk
        volumeName: cloudinitvolume
        disk:
          bus: virtio
  volumes:
    - name: registryvolume
      registryDisk:
        image: kubevirt/cirros-registry-disk-demo:devel
    - name: cloudinitvolume
      cloudInitNoCloud:
        userData: |
          ssh-authorized-keys:
            - ssh-rsa AAAAB3NzaK8L93bWxnyp test@test.com

apiVersion: garden.sapcloud.io/v1beta1
kind: Shoot
metadata:
  name: dev-eu1
  namespace: team-a
spec:
  cloud:
    profile: aws
    region: us-east-1
    secretBindingRef:
      name: team-a-aws-account-credentials
    aws:
      machineImage:
        ami: ami-34237c4d
        name: CoreOS
      networks:
        vpc:
          cidr: 10.250.0.0/16
        ...
      workers:
      - name: cpu-pool
        machineType: m4.xlarge
        volumeType: gp2
        volumeSize: 20Gi
        autoScalerMin: 2
        autoScalerMax: 5
  dns:
    provider: aws-route53
    domain: dev-eu1.team-a.example.com
  kubernetes:
    version: 1.10.2
  backup:
    ...
  maintenance:
    ...
  addons:
    cluster-autoscaler:
      enabled: true
    ...

$ gardenctl ls shoots
projects:
- project: team-a
  shoots:
  - dev-eu1
  - prod-eu1

$ gardenctl target shoot prod-eu1
[prod-eu1]

$ gardenctl show prometheus
NAME           READY     STATUS    RESTARTS   AGE       IP              NODE
prometheus-0   3/3       Running   0          106d      10.241.241.42   ip-10-240-7-72.eu-central-1.compute.internal

URL: https://user:password@p.prod-eu1.team-a.seed.aws-eu1.example.com

# Create a namespace for kubeflow deployment
NAMESPACE=kubeflow
kubectl create namespace ${NAMESPACE}
VERSION=v0.1.3

# Initialize a ksonnet app. Set the namespace for it's default environment.
APP_NAME=my-kubeflow
ks init ${APP_NAME}
cd ${APP_NAME}
ks env set default --namespace ${NAMESPACE}

# Install Kubeflow components
ks registry add kubeflow github.com/kubeflow/kubeflow/tree/${VERSION}/kubeflow
ks pkg install kubeflow/core@${VERSION}
ks pkg install kubeflow/tf-serving@${VERSION}
ks pkg install kubeflow/tf-job@${VERSION}

# Create templates for core components
ks generate kubeflow-core kubeflow-core

# Deploy Kubeflow
ks apply default -c kubeflow-core

ks generate tf-job my-tf-job --name=my-tf-job --image=gcr.io/my/image:latest
ks apply default -c my-tf-job

We could then deploy the model by doing

ks generate tf-serving ${MODEL_COMPONENT} --name=${MODEL_NAME}
ks param set ${MODEL_COMPONENT} modelPath ${MODEL_PATH}
ks apply ${ENV} -c ${MODEL_COMPONENT}

$ mkdir -p $(pwd)/ksync
$ kubectl create namespace dok
$ ksync init -n dok

$ ksync watch -n dok
$ ksync create -n dok --selector=app=stock-con $(pwd)/ksync /app
$ ksync get -n dok

$ kubectl -n=dok apply \
      -f https://raw.githubusercontent.com/kubernauts/dok-example-us/master/stock-gen/app.yaml
$ kubectl -n=dok apply \
      -f https://raw.githubusercontent.com/kubernauts/dok-example-us/master/stock-con/app.yaml

$ kubectl get -n dok po --selector=app=stock-con  \
                     -o=custom-columns=:metadata.name --no-headers |  \
                     xargs -IPOD kubectl -n dok port-forward POD 9898:9898

$ watch curl localhost:9898/healthz

$ git clone https://github.com/kubernauts/dok-example-us.git && cd dok-example-us
$ eval $(minikube docker-env)
$ kubectl create namespace dok

$ kubectl -n=dok apply -f stock-gen/app.yaml
$ kubectl -n=dok apply -f stock-con/app.yaml

$ kubectl get -n dok po --selector=app=stock-con  \
                     -o=custom-columns=:metadata.name --no-headers |  \
                     xargs -IPOD kubectl -n dok port-forward POD 9898:9898 &
$ watch curl localhost:9898/healthz

$ docker build -t stock-con:dev -f Dockerfile .
$ kubectl -n dok set image deployment/stock-con *=stock-con:dev

$ git clone https://github.com/kubernauts/dok-example-us.git && cd dok-example-us
$ kubectl create namespace dok

$ kubectl -n=dok apply -f stock-gen/app.yaml

{
   "auths": {}
}

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  labels:
    app: stock-con
  name: stock-con
  namespace: dok
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: stock-con
    spec:
      containers:
      - name: stock-con
        image: quay.io/mhausenblas/stock-con
        env:
        - name: DOK_STOCKGEN_HOSTNAME
          value: stock-gen
        - name: DOK_STOCKGEN_PORT
          value: "9999"
        ports:
        - containerPort: 9898
          protocol: TCP
        livenessProbe:
          initialDelaySeconds: 2
          periodSeconds: 5
          httpGet:
            path: /healthz
            port: 9898
        readinessProbe:
          initialDelaySeconds: 2
          periodSeconds: 5
          httpGet:
            path: /healthz
            port: 9898
---
apiVersion: v1
kind: Service
metadata:
  labels:
    app: stock-con
  name: stock-con
  namespace: dok
spec:
  type: ClusterIP
  ports:
  - name: http
    port: 80
    protocol: TCP
    targetPort: 9898
  selector:
    app: stock-con

apiVersion: skaffold/v1alpha2
kind: Config
build:
  artifacts:
  - imageName: quay.io/mhausenblas/stock-con
    workspace: .
    docker: {}
  local: {}
deploy:
  kubectl:
    manifests:
      - app.yaml

$ skaffold dev

$ kubectl get -n dok po --selector=app=stock-con  \
                     -o=custom-columns=:metadata.name --no-headers |  \
                     xargs -IPOD kubectl -n dok port-forward POD 9898:9898 &
$ watch curl localhost:9898/healthz

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: tomcat-deployment-rolling-update
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: tomcat
        role: rolling-update
    spec:
      containers:
      - name: tomcat-container
        image: tomcat:${TOMCAT_VERSION}
        ports:
        - containerPort: 8080
        readinessProbe:
          httpGet:
            path: /
            port: 8080
  strategy:
    type: RollingUpdate
    rollingUp      maxSurge: 50%

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: tomcat-deployment-${TARGET_ROLE}
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: tomcat
        role: ${TARGET_ROLE}
    spec:
      containers:
      - name: tomcat-container
        image: tomcat:${TOMCAT_VERSION}
        ports:
        - containerPort: 8080
        readinessProbe:
          httpGet:
            path: /
            port: 8080

kind: Service
apiVersion: v1
metadata:
  name: tomcat-service
  labels:
    app: tomcat
    role: ${TARGET_ROLE}
    env: prod
spec:
  type: LoadBalancer
  selector:
    app: tomcat
    role: ${TARGET_ROLE}
  ports:
    - port: 80
      targetPort: 8080

kind: Service
apiVersion: v1
metadata:
  name: tomcat-test-${TARGET_ROLE}
  labels:
    app: tomcat
    role: test-${TARGET_ROLE}
spec:
  type: LoadBalancer
  selector:
    app: tomcat
    role: ${TARGET_ROLE}
  ports:
    - port: 80
      targetPort: 8080

acsDeploy azureCredentialsId: 'stored-azure-credentials-id',
          configFilePaths: "glob/path/to/*/resource-config-*.yml",
          containerService: "aks-name | AKS",
          resourceGroupName: "resource-group-name",
          enableConfigSubstitution: true

stage('Confirm') {
    mail (to: 'to@example.com',
        subject: "Job '${env.JOB_NAME}' (${env.BUILD_NUMBER}) is waiting for input",
        body: "Please go to ${env.BUILD_URL}.")
    input 'Ready to go?'
}

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer

apiVersion: v1
kind: PersistentVolume
metadata:
  name: example-local-pv
spec:
  capacity:
    storage: 500Gi
  accessModes:
  - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  storageClassName: local-storage
  local:
    path: /mnt/disks/vol1
  nodeAffinity:
    required:
      nodeSelectorTerms:
      - matchExpressions:
        - key: kubernetes.io/hostname
          operator: In
          values:
          - my-node

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: example-local-claim
spec:
  accessModes:
  - ReadWriteOnce
  storageClassName: local-storage
  resources:
    requests:
      storage: 500Gi

kind: StatefulSet
...
 volumeClaimTemplates:
  - metadata:
      name: example-local-claim
    spec:
      accessModes:
      - ReadWriteOnce
      storageClassName: local-storage
      resources:
        requests:
          storage: 500Gi

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: fast-storage
provisioner: com.example.csi-driver
parameters:
  type: pd-ssd
  csiProvisionerSecretName: mysecret
  csiProvisionerSecretNamespace: mynamespace

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: my-request-for-storage
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi
  storageClassName: fast-storage

apiVersion: v1
kind: PersistentVolume
metadata:
  name: my-manually-created-pv
spec:
  capacity:
    storage: 5Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  csi:
    driver: com.example.csi-driver
    volumeHandle: existingVolumeName
    readOnly: false
    fsType: ext4
    volumeAttributes:
      foo: bar
    controllerPublishSecretRef:
      name: mysecret1
      namespace: mynamespace
    nodeStageSecretRef:
      name: mysecret2
      namespace: mynamespace
    nodePublishSecretRef
      name: mysecret3
      namespace: mynamespace

kind: Pod
apiVersion: v1
metadata:
  name: my-pod
spec:
  containers:
    - name: my-frontend
      image: nginx
      volumeMounts:
      - mountPath: "/var/www/html"
        name: my-csi-volume
  volumes:
    - name: my-csi-volume
      persistentVolumeClaim:
        claimName: my-request-for-storage

apiVersion: v1
kind: Pod
metadata:
  name: my-pod
spec:
  containers:
  - name: my-container
    <snip>
    volumeMounts:
    - mountPath: /mnt/data
      name: my-volume
      subPath: dataset1
  volumes:
  - name: my-volume
    emptyDir: {}

apiVersion: v1
kind: Pod
metadata:
  name: my-pod
spec:
  initContainers:
  - name: prep-symlink
    image: "busybox"
    command: ["bin/sh", "-ec", "ln -s / /mnt/data/symlink-door"]
    volumeMounts:
    - name: my-volume
      mountPath: /mnt/data
  containers:
  - name: my-container
    image: "busybox"
    command: ["/bin/sh", "-ec", "ls /mnt/data; sleep 999999"]
    volumeMounts:
    - mountPath: /mnt/data
      name: my-volume
      subPath: symlink-door
  volumes:
  - name: my-volume
    emptyDir: {}

 kubectl create -f mysqlshardingcluster.yaml

[root@k8s-master ~]# kubectl get mysqlcluster  


NAME             KIND

clustershard-c   MysqlCluster.v1.mysql.orain.com

[root@k8s-master ~]# kubectl get mysqldatabase  

NAME KIND  

clustershard-c0 MysqlDatabase.v1.mysql.orain.com  

clustershard-c1 MysqlDatabase.v1.mysql.orain.com  

clustershard-c2 MysqlDatabase.v1.mysql.orain.com  

clustershard-c3 MysqlDatabase.v1.mysql.orain.com  

clustershard-c4 MysqlDatabase.v1.mysql.orain.com  

clustershard-c5 MysqlDatabase.v1.mysql.orain.com  

clustershard-c6 MysqlDatabase.v1.mysql.orain.com  

clustershard-c7 MysqlDatabase.v1.mysql.orain.com


root@k8s-master ~]# kubectl get mysqlcluster -o yaml clustershard-c

apiVersion: v1

items:

\- apiVersion: mysql.orain.com/v1

 kind: MysqlCluster

 metadata:

   creationTimestamp: 2017-10-20T08:19:41Z

   labels:

     AppName: clustershard-crm

     Createdby: orain.com

     DBType: MySQL

   name: clustershard-c

   namespace: default

   resourceVersion: "415852"

   uid: 6bb089bb-b56f-11e7-ae02-525400e717a6

 spec:



     dbresourcespec:

       limitedcpu: 1200m

       limitedmemory: 400Mi

       requestcpu: 1000m

       requestmemory: 400Mi



 status:

   currentReplicas: 8

   currentRevision: clustershard-c-648d878965

   replicas: 8

   updateRevision: clustershard-c-648d878965

kind: List

$ kubectl cluster-info  

Kubernetes master is running at https://xx.yy.zz.ww

$ bin/spark-submit

   --master k8s://https://xx.yy.zz.ww

   --deploy-mode cluster

   --name spark-pi

   --class org.apache.spark.examples.SparkPi

   --conf spark.executor.instances=5

   --conf spark.kubernetes.container.image=

   --conf spark.kubernetes.driver.pod.name=spark-pi-driver

   local:///opt/spark/examples/jars/spark-examples_2.11-2.3.0.jar

$ kubectl get pods -l 'spark-role in (driver, executor)' -w

NAME              READY STATUS  RESTARTS AGE

spark-pi-driver   1/1 Running  0 14s

spark-pi-da1968a859653d6bab93f8e6503935f2-exec-1   0/1 Pending 0 0s


$ kubectl logs -f spark-pi-driver

// eventRecorder returns an EventRecorder type that can be  
// used to post Events to different object's lifecycles.  
func eventRecorder(  
   kubeClient \*kubernetes.Clientset) (record.EventRecorder, error) {  
   eventBroadcaster := record.NewBroadcaster()  
   eventBroadcaster.StartLogging(glog.Infof)  
   eventBroadcaster.StartRecordingToSink(  
      &typedcorev1.EventSinkImpl{  
         Interface: kubeClient.CoreV1().Events("")})  
   recorder := eventBroadcaster.NewRecorder(  
      scheme.Scheme,  
      v1.EventSource{Component: "controlplane"})  
   return recorder, nil  
}

ref, err := reference.GetReference(scheme.Scheme, &pod)  
if err != nil {  
   glog.Fatalf("Could not get reference for pod %v: %v\n",  
      pod.Name, err)  
}  
recorder.Event(ref, v1.EventTypeWarning, "pki ServiceName error",  
   fmt.Sprintf("ServiceName: %s in pki: %s is not found in"+  
      " allowedNames: %s", pki.Spec.ServiceName, pki.Name,  
      allowedNames))

Events:  
  FirstSeen   LastSeen   Count   From         SubObjectPath   Type      Reason         Message  
  ---------   --------   -----   ----         -------------   --------   ------     
  ....  
  1d      1m      24   controlplane            Warning      pki ServiceName error   ServiceName: appp1 in pki: app1-pki is not found in allowedNames: [app1 app2]  
  ....  


apiVersion: apiextensions.k8s.io/v1beta1  
kind: CustomResourceDefinition  
metadata: ...  
spec:  
  ...  
  validation:  
    openAPIV3Schema:  
      properties:  
        spec:  
          properties:  
            version:  
                type: string  
                enum:  
                - "v1.0.0"  
                - "v1.0.1"  
            replicas:  
                type: integer  
                minimum: 1  
                maximum: 10


apiVersion: mygroup.example.com/v1  
kind: App  
metadata:  
  name: example-app  
spec:  
  version: "v1.0.2"  
  replicas: 15

$ kubectl create -f app.yaml

The App "example-app" is invalid: []: Invalid value: map[string]interface {}{"apiVersion":"mygroup.example.com/v1", "kind":"App", "metadata":map[string]interface {}{"creationTimestamp":"2017-08-31T20:52:54Z", "uid":"5c674651-8e8e-11e7-86ad-f0761cb232d1", "clusterName":"", "name":"example-app", "namespace":"default", "deletionTimestamp":interface {}(nil), "deletionGracePeriodSeconds":(\*int64)(nil)}, "spec":map[string]interface {}{"replicas":15, "version":"v1.0.2"}}:
validation failure list:  
spec.replicas in body should be less than or equal to 10  
spec.version in body should be one of [v1.0.0 v1.0.1]


import “k8s.io/client-go/informers”
...  
sharedInformers := informers.NewFilteredSharedInformerFactory(  
 client,  
 30\*time.Minute,   
 “some-namespace”,  
 func(opt \*metav1.ListOptions) {  
  opt.LabelSelector = “foo=bar”  
 },  
)  


import (


apimeta "k8s.io/apimachinery/pkg/api/meta"

 discocache "k8s.io/client-go/discovery/cached"  
 "k8s.io/client-go/discovery"

"k8s.io/client-go/dynamic"

“k8s.io/client-go/scale”  
)

...

cachedDiscovery := discocache.NewMemCacheClient(client.Discovery())  
restMapper := discovery.NewDeferredDiscoveryRESTMapper(

cachedDiscovery,

apimeta.InterfacesForUnstructured,

)  
scaleKindResolver := scale.NewDiscoveryScaleKindResolver(

client.Discovery(),

)  
scaleClient, err := scale.NewForConfig(

client, restMapper,

dynamic.LegacyAPIPathResolverFunc,

scaleKindResolver,

)
scale, err := scaleClient.Scales("default").Get(groupResource, "foo")


newObj, err := runtime.NewScheme().Copy(node)


if err != nil {

    return fmt.Errorf("failed to copy node %v: %s”, node, err)

}


newNode, ok := newObj.(\*v1.Node)

if !ok {

    return fmt.Errorf("failed to type-assert node %v", newObj)


}

// second block above  
// +k8s:some-tag  

// first block above  
// +k8s:another-tag  
type Foo struct {}

// genclient:method=UpdateScale,verb=update,subresource=scale,input=k8s.io/kubernetes/pkg/apis/autoscaling.Scale,result=k8s.io/kubernetes/pkg/apis/autoscaling.Scale

// +groupName=example2.example.com  
// +groupGoName=SecondExample






[[constraint]]


  name = "k8s.io/api"

  version = "kubernetes-1.8.1"


[[constraint]]

  name = "k8s.io/apimachinery"

  version = "kubernetes-1.8.1"


[[constraint]]

  name = "k8s.io/apiextensions-apiserver"

  version = "kubernetes-1.8.1"


[[constraint]]

  name = "k8s.io/client-go"




  version = "5.0.1"






[constraint]]


  name = "k8s.io/api"

  version = "kubernetes-1.9.0"


[[constraint]]

  name = "k8s.io/apimachinery"

  version = "kubernetes-1.9.0"


[[constraint]]

  name = "k8s.io/apiextensions-apiserver"

  version = "kubernetes-1.9.0"


[[constraint]]

  name = "k8s.io/client-go"




  version = "6.0.0"


required = [  
  "k8s.io/code-generator/cmd/client-gen",  
  "k8s.io/code-generator/cmd/conversion-gen",  
  "k8s.io/code-generator/cmd/deepcopy-gen",  
  "k8s.io/code-generator/cmd/defaulter-gen",  
  "k8s.io/code-generator/cmd/informer-gen",  
  "k8s.io/code-generator/cmd/lister-gen",  
]


[[constraint]]

  branch = "kubernetes-1.9.0"


  name = "k8s.io/code-generator"

1 apiVersion: admissionregistration.k8s.io/v1beta1  
2 kind: ValidatingWebhookConfiguration  
3 metadata:  
4   name: namespacereservations.admission.online.openshift.io  
5 webhooks:  
6 - name: namespacereservations.admission.online.openshift.io  
7   clientConfig:  
8     service:  
9       namespace: default  
10      name: kubernetes  
11     path: /apis/admission.online.openshift.io/v1alpha1/namespacereservations  
12    caBundle: KUBE\_CA\_HERE  
13  rules:  
14  - operations:  
15    - CREATE  
16    apiGroups:  
17    - ""  
18    apiVersions:  
19    - "\*"  
20    resources:  
21    - namespaces  
22  failurePolicy: Fail

CSI is an alpha feature in Kubernetes v1.9. To enable it, set the following flags:

API server binary:
--feature-gates=CSIPersistentVolume=true
--runtime-config=storage.k8s.io/v1alpha1=true
API server binary and kubelet binaries:
--feature-gates=MountPropagation=true
--allow-privileged=true

kind: StorageClass

apiVersion: storage.k8s.io/v1

metadata:

  name: fast-storage

provisioner: com.example.team/csi-driver

parameters:

  type: pd-ssd

apiVersion: v1

kind: PersistentVolumeClaim

metadata:

  name: my-request-for-storage

spec:

  accessModes:

  - ReadWriteOnce

  resources:

    requests:

      storage: 5Gi

  storageClassName: fast-storage

apiVersion: v1

kind: PersistentVolume

metadata:

  name: my-manually-created-pv

spec:

  capacity:

    storage: 5Gi

  accessModes:

    - ReadWriteOnce

  persistentVolumeReclaimPolicy: Retain

  csi:

    driver: com.example.team/csi-driver

    volumeHandle: existingVolumeName

    readOnly: false

kind: Pod

apiVersion: v1

metadata:

  name: my-pod

spec:

  containers:

    - name: my-frontend

      image: dockerfile/nginx

      volumeMounts:

      - mountPath: "/var/www/html"

        name: my-csi-volume

  volumes:

    - name: my-csi-volume

      persistentVolumeClaim:

        claimName: my-request-for-storage

     ks init my-kubeflow  
     cd my-kubeflow  
     ks registry add kubeflow \  
     github.com/google/kubeflow/tree/master/kubeflow  
     ks pkg install kubeflow/core  
     ks pkg install kubeflow/tf-serving  
     ks pkg install kubeflow/tf-job  
     ks generate core kubeflow-core --name=kubeflow-core

     kubectl config use-context minikube  
     ks env add minikube  

     kubectl config use-context gke  
     ks env add gke  

     ks apply minikube -c kubeflow-core  

     ks apply gke -c kubeflow-core  

     kubectl port-forward tf-hub-0 8100:8000  

     # To access minikube  
     kubectl config use-context minikube  

     # To access GKE  
     kubectl config use-context gke  

     ks generate tf-cnn cnn --name=cnn  

     ks apply minikube -c cnn

     # To see a list of parameters  
     ks prototype list tf-job  

     ks param set --env=gke cnn num\_gpus 1  
     ks param set --env=gke cnn num\_workers 1  

     ks apply gke -c cnn  

     ks generate tf-serving inception --name=inception  
     ---namespace=default --model\_path=gs://$bucket_name/$model_loc
     ks apply gke -c inception  

C  
fd = open(“myfile.txt”, O\_RDWR);

gpg --quick-generate-key --yes qa\_bob@example.com

gpg --armor --export image.signer@example.com \> ${GPG\_KEY\_ID}.pub

curl -X POST \  
  "http://127.0.0.1:8080/v1alpha1/projects/image-signing/notes?noteId=qa" \  
  -d @note.json

kubectl create configmap image-signature-webhook \  
  --from-file ${GPG\_KEY\_ID}.pub

kubectl get configmap image-signature-webhook -o yaml

kubectl apply -f kubernetes/image-signature-webhook.yaml

kubectl apply -f pods/nginx.yaml

apiVersion: v1

kind: Pod

metadata:

  name: payment

spec:

  containers:

    - name: payment

      image: "gcr.io/hightowerlabs/payment@sha256:aba48d60ba4410ec921f9d2e8169236c57660d121f9430dc9758d754eec8f887"

kubectl apply -f pods/paymentProcessor.yaml

The  "" is invalid: : No matched signatures for container image: gcr.io/hightowerlabs/payment@sha256:aba48d60ba4410ec921f9d2e8169236c57660d121f9430dc9758d754eec8f887

gpg -u qa\_bob@example.com \  
  --armor \  
  --clearsign \  
  --output=signature.gpg \  
  Image-digest.txt

cat \> occurrence.json \<\<EOF  
{  
  "resourceUrl": "$(cat image-digest.txt)",  
  "noteName": "projects/image-signing/notes/qa",  
  "attestation": {  
    "pgpSignedAttestation": {  
       "signature": "$(cat signature.gpg)",  
       "contentType": "application/vnd.gcr.image.url.v1",  
       "pgpKeyId": "${GPG\_KEY\_ID}"  
    }  
  }  
}  
EOF

curl -X POST \  
  'http://127.0.0.1:8080/v1alpha1/projects/image-signing/occurrences' \  
  -d @occurrence.json

kubectl apply -f pods/paymentProcessor.yaml

pod "PaymentProcessor" created

kind: NetworkPolicy

apiVersion: networking.k8s.io/v1

metadata:

  name: access-nginx

spec:

  podSelector:

    matchLabels:

      app: nginx

  ingress:

  - from:

    - podSelector:

        matchLabels:

          app: foo

apiVersion: networking.k8s.io/v1

kind: NetworkPolicy

metadata:

  name: default-deny

spec:

  podSelector:


$ kubectl get clusterroles

NAME            AGE

admin           40m

cluster-admin   40m

edit            40m

# ...


view            40m


$ kubectl create clusterrolebinding jane --clusterrole=edit --user=jane

$ kubectl get namespaces --as=jane

NAME          STATUS    AGE

default       Active    43m

kube-public   Active    43m

kube-system   Active    43m

$ kubectl auth can-i create deployments --namespace=dev --as=jane

yes


$ kubectl create rolebinding infra --clusterrole=edit --group=infra --namespace=dev

rolebinding "infra" created


$ kubectl get deployments --as=dave --as-group=infra --namespace dev

No resources found.

$ kubectl get deployments --as=dave --as-group=infra --namespace prod

Error from server (Forbidden): deployments.extensions is forbidden: User "dave" cannot list deployments.extensions in the namespace "prod".


kind: ClusterRole

apiVersion: rbac.authorization.k8s.io/v1

metadata:

 name: deployer

rules:

- apiGroups: ["apps"]

 resources: ["deployments"]

 verbs: ["get", "list", "watch", "create", "delete", "update", "patch"]



- apiGroups: [""] # "" indicates the core API group

 resources: ["configmaps", "secrets"]

 verbs: ["get", "list", "watch", "create", "delete", "update", "patch"]



- apiGroups: [""] # "" indicates the core API group

 resources: ["pods"]

 verbs: ["get", "list", "watch"]


apiVersion: extensions/v1beta1

kind: Ingress

metadata:

 name: test-ingress

spec:

 backend:

   serviceName: testsvc

   servicePort: 80


rules:

- apiGroups: ["extensions"] # "apiVersion" without version

 resources: ["ingresses"]  # Plural of "kind"

 verbs: ["create"]         # "POST" maps to "create"


kind: Role

metadata:

 name: prometheus-role

 namespace: dev

rules:

- apiGroups: [""] # "" refers to the core API group

 Resources: ["services", "endpoints", "pods"]

 verbs: ["get", "list", "watch"]


apiVersion: apps/v1beta2 # Abbreviated, not a full manifest

kind: Deployment

metadata:

 name: prometheus-deployment

 namespace: dev

spec:

 replicas: 1

 template:

   spec:

     containers:

     - name: prometheus

       image: prom/prometheus:v1.8.0

       command: ["prometheus", "-config.file=/etc/prom/config.yml"]

   # Run this pod using the "prometheus-sa" service account.

   serviceAccountName: prometheus-sa

---

apiVersion: v1

kind: ServiceAccount

metadata:

 name: prometheus-sa

 namespace: dev

$ kubeadm upgrade plan

$ kubeadm upgrade apply v1.8.0

$ kubeadm init --feature-gates=SelfHosting=true

kubectl apply -f \<(istioctl kube-inject -f bookinfo-v1.yaml)

cat \<\<EOF | kubectl create -f -

apiVersion: extensions/v1beta1

kind: Ingress

metadata:

name: bookinfo

annotations:

    kubernetes.io/ingress.class: "istio"

spec:

rules:

- http:

        paths:

        - path: /productpage

            backend:

                serviceName: productpage

                servicePort: 9080

        - path: /login

            backend:

                serviceName: productpage

                servicePort: 9080

        - path: /logout

            backend:

                serviceName: productpage

                servicePort: 9080

EOF

export BOOKINFO\_URL=$(kubectl get po -n istio-system -l istio=ingress -o jsonpath={.items[0].status.hostIP}):$(kubectl get svc -n istio-system istio-ingress -o jsonpath={.spec.ports[0].nodePort})

apiVersion: extensions/v1beta1

kind: Deployment

metadata:

name: reviews-v2

spec:

replicas: 1

template:

    metadata:

        labels:

            app: reviews

            version: v2

    spec:

        containers:

        - name: reviews

            image: istio/examples-bookinfo-reviews-v2:0.2.3

            imagePullPolicy: IfNotPresent

            ports:

            - containerPort: 9080

kubectl apply -f \<(istioctl kube-inject -f bookinfo-ratings.yaml)

cat \<\<EOF | istioctl create -f -

apiVersion: config.istio.io/v1alpha2

kind: RouteRule

metadata:

  name: reviews-default

spec:

  destination:

      name: reviews

  route:

  - labels:

          version: v1

      weight: 100

EOF

kubectl apply -f \<(istioctl kube-inject -f bookinfo-reviews-v2.yaml)

apiVersion: config.istio.io/v1alpha2

kind: RouteRule

metadata:

  name: reviews-default

spec:

  destination:

      name: reviews

  route:

  - labels:

          version: v2

      weight: 10

  - labels:

          version: v1

      weight: 90

cat \<\<EOF | istioctl create -f -

apiVersion: config.istio.io/v1alpha2

kind: RouteRule

metadata:

name: reviews-test-v2

spec:

destination:

    name: reviews

precedence: 2

match:

    request:

        headers:

            cookie:

                regex: "^(.\*?;)?(user=jason)(;.\*)?$"

route:

- labels:

        version: v2

    weight: 100

EOF

cat \<\<EOF | istioctl replace -f -

apiVersion: config.istio.io/v1alpha2

kind: RouteRule

metadata:

  name: reviews-default

spec:

  destination:

      name: reviews

  route:

  - labels:

          version: v2

      weight: 100

EOF

istioctl delete routerule reviews-test-v2

cat \<\<EOF | istioctl create -f -

apiVersion: "config.istio.io/v1alpha2"

kind: memquota

metadata:

name: handler

namespace: default

spec:

quotas:

- name: requestcount.quota.default

    maxAmount: 5000

    validDuration: 1s

    overrides:

    - dimensions:

            destination: ratings

        maxAmount: 1

        validDuration: 1s

EOF

cat \<\<EOF | istioctl create -f -

apiVersion: "config.istio.io/v1alpha2"

kind: quota

metadata:

name: requestcount

namespace: default

spec:

dimensions:

    source: source.labels["app"] | source.service | "unknown"

    sourceVersion: source.labels["version"] | "unknown"

    destination: destination.labels["app"] | destination.service | "unknown"

    destinationVersion: destination.labels["version"] | "unknown"

---

apiVersion: "config.istio.io/v1alpha2"

kind: rule

metadata:

name: quota

namespace: default

spec:

actions:

- handler: handler.memquota

    instances:

    - requestcount.quota

EOF

wrk -t1 -c1 -d20s http://$BOOKINFO\_URL/productpage

$ kubectl apply -f zookeeper\_mini.yaml

service "zk-hs" created

service "zk-cs" created

poddisruptionbudget "zk-pdb" created

statefulset "zk" created

$ kubectl get po -lapp=zk -w

NAME           READY         STATUS        RESTARTS     AGE


zk-0           0/1             Pending      0                   0s


zk-0           0/1             Pending     0                  0s


zk-1           0/1             Pending     0                  0s


zk-1           0/1             Pending     0                  0s


zk-0           0/1             ContainerCreating      0                  0s


zk-2           0/1             Pending      0                  0s


zk-1           0/1             ContainerCreating     0                  0s


zk-2           0/1             Pending      0                  0s


zk-2           0/1             ContainerCreating      0                  0s


zk-0           0/1             Running     0                  10s


zk-2           0/1             Running     0                  11s


zk-1           0/1             Running      0                  19s


zk-0           1/1             Running      0                  20s


zk-1           1/1             Running      0                  30s


zk-2           1/1             Running      0                  30s

apiVersion: apps/v1beta1  
kind: StatefulSet  
metadata:  
   name: zk  

spec:  
   serviceName: zk-hs  

   replicas: 3  

   updateStrategy:  

       type: RollingUpdate  

   podManagementPolicy: Parallel  

 ...

$ kubectl apply -f kafka\_mini.yaml

service "kafka-hs" created

poddisruptionbudget "kafka-pdb" created

statefulset "kafka" created

$ kubectl get po -lapp=kafka -w

NAME           READY         STATUS        RESTARTS     AGE


kafka-0     0/1             Pending      0                   0s


kafka-0     0/1             Pending      0                  0s


kafka-1     0/1             Pending      0                  0s


kafka-1     0/1             Pending      0                  0s


kafka-2     0/1             Pending      0                  0s


kafka-0     0/1             ContainerCreating     0                  0s


kafka-2     0/1             Pending      0                  0s


kafka-1     0/1             ContainerCreating     0                  0s


kafka-1     0/1             Running     0                  11s


kafka-0     0/1             Running     0                  19s


kafka-1     1/1             Running     0                  23s


kafka-0     1/1             Running     0                  32s

$ kubectl run -ti --image=gcr.io/google\_containers/kubernetes-kafka:1.0-10.2.1 createtopic --restart=Never --rm -- kafka-topics.sh --create \

\> --topic test \

\> --zookeeper zk-cs.default.svc.cluster.local:2181 \

\> --partitions 1 \

\> --replication-factor 3

$ kubectl run -ti --image=gcr.io/google\_containers/kubnetes-kafka:1.0-10.2.1 consume --restart=Never --rm -- kafka-console-consumer.sh --topic test --bootstrap-server kafka-0.kafka-hs.default.svc.cluster.local:9093

$kubectl run -ti --image=gcr.io/google\_containers/kubernetes-kafka:1.0-10.2.1 produce --restart=Never --rm \

\>   -- kafka-console-producer.sh --topic test --broker-list kafka-0.kafka-hs.default.svc.cluster.local:9093,kafka-1.kafka-hs.default.svc.cluster.local:9093,kafka-2.kafka-hs.default.svc.cluster.local:9093

$ kubectl patch sts kafka --type='json' -p='[{"op": "replace", "path": "/spec/template/spec/containers/0/resources/requests/cpu", "value":"250m"}]'

statefulset "kafka" patched

$kubectl get po -lapp=kafka -w

NAME           READY         STATUS       RESTARTS     AGE


kafka-0     1/1             Running     0                   13m


kafka-1     1/1             Running     0                   13m


kafka-2     1/1             Running     0                   13m


kafka-2     1/1             Terminating     0                 14m


kafka-2     0/1             Terminating     0                 14m


kafka-2     0/1             Terminating     0                 14m


kafka-2     0/1             Terminating     0                 14m


kafka-2     0/1             Pending     0                 0s


kafka-2     0/1             Pending     0                 0s


kafka-2     0/1             ContainerCreating     0                 0s


kafka-2     0/1             Running     0                 10s


kafka-2     1/1             Running     0                 21s


kafka-1     1/1             Terminating     0                 14m


kafka-1     0/1             Terminating     0                 14m


kafka-1     0/1             Terminating     0                 14m


kafka-1     0/1             Terminating     0                 14m


kafka-1     0/1             Pending     0                 0s


kafka-1     0/1             Pending     0                 0s


kafka-1     0/1             ContainerCreating     0                 0s


kafka-1     0/1             Running     0                 11s


kafka-1     1/1             Running     0                 21s


kafka-0     1/1             Terminating     0                 14m


kafka-0     0/1             Terminating     0                 14m


kafka-0     0/1             Terminating     0                 14m


kafka-0     0/1             Terminating     0                 14m


kafka-0     0/1             Pending     0                 0s


kafka-0     0/1             Pending     0                 0s


kafka-0     0/1             ContainerCreating     0                 0s


kafka-0     0/1             Running     0                 10s


kafka-0     1/1             Running     0                 22s

$ kubectl patch sts kafka -p '{"spec":{"updateStrategy":{"type":"RollingUpdate","rollingUpdate":{"partition":3}}}}'

statefulset "kafka" patched

$ kubectl patch sts kafka --type='json' -p='[{"op": "replace", "path": "/spec/template/spec/containers/0/resources/requests/cpu", "value":"0.3"}]'

statefulset "kafka" patched

$   kubectl delete po kafka-1


pod "kafka-1" deleted


$ kubectl get po kafka-1 -w

NAME           READY         STATUS                           RESTARTS     AGE


kafka-1     0/1             ContainerCreating     0                   10s


kafka-1     0/1             Running     0                 19s


kafka-1     1/1             Running     0                 21s



$ kubectl get po kafka-1 -o yaml

apiVersion: v1

kind: Pod

metadata:

   ...


       resources:


           requests:


               cpu: 250m


               memory: 1Gi

$ kubectl patch sts kafka -p '{"spec":{"updateStrategy":{"type":"RollingUpdate","rollingUpdate":{"partition":2}}}}'

statefulset "kafka" patched

$   kubectl get po -lapp=kafka -w


NAME           READY         STATUS       RESTARTS     AGE


kafka-0     1/1             Running     0                   50m


kafka-1     1/1             Running     0                   10m


kafka-2     1/1             Running     0                   29s


kafka-2     1/1             Terminating     0                 34s


kafka-2     0/1             Terminating     0                 38s


kafka-2     0/1             Terminating     0                 39s


kafka-2     0/1             Terminating     0                 39s


kafka-2     0/1             Pending     0                 0s


kafka-2     0/1             Pending     0                 0s


kafka-2     0/1             Terminating     0                 20s


kafka-2     0/1             Terminating     0                 20s


kafka-2     0/1             Pending     0                 0s


kafka-2     0/1             Pending     0                 0s


kafka-2     0/1             ContainerCreating     0                 0s


kafka-2     0/1             Running     0                 19s


kafka-2     1/1             Running     0                 22s

$ kubectl patch sts kafka -p '{"spec":{"updateStrategy":{"type":"RollingUpdate","rollingUpdate":{"partition":1}}}}'

statefulset "kafka" patched

$ kubectl patch sts kafka -p '{"spec":{"updateStrategy":{"type":"RollingUpdate","rollingUpdate":{"partition":0}}}}'

statefulset "kafka" patched

$ kubectl delete -f kafka\_mini.yaml

service "kafka-hs" deleted

poddisruptionbudget "kafka-pdb" deleted

Statefulset “kafka” deleted


$ kubectl delete -f zookeeper\_mini.yaml

service "zk-hs" deleted

service "zk-cs" deleted

poddisruptionbudget "zk-pdb" deleted

statefulset "zk" deleted

$ cat \>\> node-exporter-v0.13.yaml \<\<EOF

apiVersion: extensions/v1beta1  
kind: DaemonSet  
metadata:  
   name: node-exporter  

spec:  
   updateStrategy:  

       type: RollingUpdate  

   template:  

       metadata:  

           labels:  

               app: node-exporter  

           name: node-exporter  

       spec:  

           containers:  

           - image: prom/node-exporter:v0.13.0  

               name: node-exporter  

               ports:  

               - containerPort: 9100  

                   hostPort: 9100  

                   name: scrape  

           hostNetwork: true  

           hostPID: true


EOF

$ kubectl apply -f node-exporter-v0.13.yaml --record

daemonset "node-exporter" created

$ kubectl rollout status ds node-exporter  
daemon set "node-exporter" successfully rolled out

$ kubectl get pods -l app=node-exporter -o wide

$ cat node-exporter-v0.13.yaml ```  sed "s/v0.13.0/v0.14.0/g" \> node-exporter-v0.14.yaml

$ kubectl apply -f node-exporter-v0.14.yaml --record

daemonset "node-exporter" configured

$ kubectl rollout status ds node-exporter

...

Waiting for rollout to finish: 3 out of 4 new pods have been updated...  
Waiting for rollout to finish: 3 of 4 updated pods are available...  
daemon set "node-exporter" successfully rolled out

$ cat node-exporter-v0.13.yaml | sed "s/v0.13.0/bad/g" \> node-exporter-bad.yaml


$ kubectl apply -f node-exporter-bad.yaml --record

daemonset "node-exporter" configured

$ kubectl rollout status ds node-exporter   
Waiting for rollout to finish: 0 out of 4 new pods have been updated...  
Waiting for rollout to finish: 1 out of 4 new pods have been updated…

# Use ^C to exit

$ kubectl get pods -l app=node-exporter

NAME                                   READY         STATUS                 RESTARTS     AGE


node-exporter-f2n14     0/1             ErrImagePull     0                   3m


...


# N = number of nodes

$ kubectl get ds node-exporter  
NAME                       DESIRED     CURRENT     READY         UP-TO-DATE     AVAILABLE     NODE SELECTOR     AGE  

node-exporter     N                 N                 N-1             1                       N                     \<none\>                   46m

$ kubectl rollout history ds node-exporter   
daemonsets "node-exporter"  
REVISION               CHANGE-CAUSE  

1                             kubectl apply --filename=node-exporter-v0.13.yaml --record=true  

2                             kubectl apply --filename=node-exporter-v0.14.yaml --record=true


3                             kubectl apply --filename=node-exporter-bad.yaml --record=true

$ kubectl rollout history ds node-exporter --revision=2  
daemonsets "node-exporter" with revision #2  
Pod Template:  
   Labels:             app=node-exporter  

   Containers:  

     node-exporter:  

       Image:           prom/node-exporter:v0.14.0  

       Port:             9100/TCP  

       Environment:               \<none\>  

       Mounts:         \<none\>  

   Volumes:           \<none\>

# Roll back to the last revision

$ kubectl rollout undo ds node-exporter   
daemonset "node-exporter" rolled back


# Or use --to-revision to roll back to a specific revision

$ kubectl rollout undo ds node-exporter --to-revision=2  
daemonset "node-exporter" rolled back

$ kubectl rollout history ds node-exporter   
daemonsets "node-exporter"  
REVISION               CHANGE-CAUSE  

1                             kubectl apply --filename=node-exporter-v0.13.yaml --record=true  

3                             kubectl apply --filename=node-exporter-bad.yaml --record=true  

4                             kubectl apply --filename=node-exporter-v0.14.yaml --record=true

$ kubectl rollout status ds node-exporter  
daemon set "node-exporter" successfully rolled out


# N = number of nodes

$ kubectl get ds node-exporter

NAME                       DESIRED     CURRENT     READY         UP-TO-DATE     AVAILABLE     NODE SELECTOR     AGE  

node-exporter     N                 N                 N                 N                       N                     \<none\>                   46m

$ kubectl rollout undo ds node-exporter --to-revision=4  
daemonset "node-exporter" skipped rollback (current template already matches revision 4)

$ kubectl rollout undo ds node-exporter --to-revision=10  
error: unable to find specified revision 10 in history

$ kubectl delete ds node-exporter

$ wget https://raw.githubusercontent.com/kubernetes/kompose/master/examples/docker-compose.yaml

$ docker-compose up -d

Creating network "examples\_default" with the default driver

Creating examples\_redis-slave\_1

Creating examples\_frontend\_1

Creating examples\_redis-master\_1

$ kompose up


We are going to create Kubernetes Deployments, Services and PersistentVolumeClaims for your Dockerized application.


If you need different kind of resources, use the kompose convert and kubectl create -f commands instead.


INFO Successfully created Service: redis          

INFO Successfully created Service: web            

INFO Successfully created Deployment: redis       

INFO Successfully created Deployment: web         


Your application has been deployed to Kubernetes. You can run kubectl get deployment,svc,pods,pvc for details

$ kompose convert --help  

Usage:

  kompose convert [file] [flags]


Kubernetes Flags:

      --daemon-set               Generate a Kubernetes daemonset object

  -d, --deployment               Generate a Kubernetes deployment object

  -c, --chart                    Create a Helm chart for converted objects

      --replication-controller   Generate a Kubernetes replication controller object

…

$ kompose convert --daemon-set

INFO Kubernetes file "frontend-service.yaml" created

INFO Kubernetes file "redis-master-service.yaml" created

INFO Kubernetes file "redis-slave-service.yaml" created

INFO Kubernetes file "frontend-daemonset.yaml" created

INFO Kubernetes file "redis-master-daemonset.yaml" created

INFO Kubernetes file "redis-slave-daemonset.yaml" created

apiVersion: v1

kind: Service

metadata:

name: productpage

labels:

  app: productpage

spec:

type: NodePort

ports:

- port: 9080

  name: http

selector:

  app: productpage

---

apiVersion: extensions/v1beta1

kind: Deployment

metadata:

name: productpage-v1

spec:

replicas: 1

template:

  metadata:

    labels:

      app: productpage

      track: stable

  spec:

    containers:

    - name: productpage

      image: istio/examples-bookinfo-productpage-v1

      imagePullPolicy: IfNotPresent

      ports:

      - containerPort: 9080

kubectl apply -f bookinfo-v1.yaml

export BOOKINFO\_URL=$(kubectl get po -l app=productpage -o jsonpath={.items[0].status.hostIP}):$(kubectl get svc productpage -o jsonpath={.spec.ports[0].nodePort})

kubectl delete -f bookinfo-v1.yaml

kubectl apply -f \<(istioctl kube-inject -f bookinfo-v1.yaml)

cat \<\<EOF  ``` kubectl create -f -

apiVersion: extensions/v1beta1

kind: Ingress

metadata:

name: bookinfo

annotations:

  kubernetes.io/ingress.class: "istio"

spec:

rules:

- http:

    paths:

    - path: /productpage

      backend:

        serviceName: productpage

        servicePort: 9080

    - path: /login

      backend:

        serviceName: productpage

        servicePort: 9080

    - path: /logout

      backend:

        serviceName: productpage

        servicePort: 9080

EOF

export BOOKINFO\_URL=$(kubectl get po -l istio=ingress -o jsonpath={.items[0].status.hostIP}):$(kubectl get svc istio-ingress -o jsonpath={.spec.ports[0].nodePort})

wrk -t1 -c1 -d20s http://$BOOKINFO\_URL/productpage

export GRAFANA\_URL=$(kubectl get po -l app=grafana -o jsonpath={.items[0].status.hostIP}):$(kubectl get svc grafana -o jsonpath={.spec.ports[0].nodePort})

export ZIPKIN\_URL=$(kubectl get po -l app=zipkin -o jsonpath={.items[0].status.hostIP}):$(kubectl get svc zipkin -o jsonpath={.spec.ports[0].nodePort})

$ cd examples/python

$ draft create

--\> Python app detected

--\> Ready to sail

$ ls

Dockerfile  app.py  chart/  draft.toml  requirements.txt

$ cat draft.toml  
[environments]  
 [environments.development]  
   name = "tufted-lamb"  
   namespace = "default"  
   watch = true  
   watch\_delay = 2

$ draft up  
--\> Building Dockerfile  
Step 1 : FROM python:onbuild  
onbuild: Pulling from library/python  
...  
Successfully built 38f35b50162c  
--\> Pushing docker.io/microsoft/tufted-lamb:5a3c633ae76c9bdb81b55f5d4a783398bf00658e  
The push refers to a repository [docker.io/microsoft/tufted-lamb]  
...  
5a3c633ae76c9bdb81b55f5d4a783398bf00658e: digest: sha256:9d9e9fdb8ee3139dd77a110fa2d2b87573c3ff5ec9c045db6009009d1c9ebf5b size: 16384  
--\> Deploying to Kubernetes  
   Release "tufted-lamb" does not exist. Installing it now.  
--\> Status: DEPLOYED  
--\> Notes:  
    1. Get the application URL by running these commands:  
    NOTE: It may take a few minutes for the LoadBalancer IP to be available.  
          You can watch the status of by running 'kubectl get svc -w tufted-lamb-tufted-lamb'  
 export SERVICE\_IP=$(kubectl get svc --namespace default tufted-lamb-tufted-lamb -o jsonpath='{.status.loadBalancer.ingress[0].ip}')  
 echo http://$SERVICE\_IP:80  

Watching local files for changes...

$ export SERVICE\_IP=$(kubectl get svc --namespace default tufted-lamb-tufted-lamb -o jsonpath='{.status.loadBalancer.ingress[0].ip}')  
$ curl [http://$SERVICE\_IP](http://%24service_ip/)

$ cat \<\<EOF \> app.py  
from flask import Flask  

app = Flask(\_\_name\_\_)  

@app.route("/")  
def hello():  
   return "Hello, Draft!\n"  

if \_\_name\_\_ == "\_\_main\_\_":  
   app.run(host='0.0.0.0', port=8080)  
EOF

--\> Building Dockerfile  
Step 1 : FROM python:onbuild  
...  
Successfully built 9c90b0445146  
--\> Pushing docker.io/microsoft/tufted-lamb:f031eb675112e2c942369a10815850a0b8bf190e  
The push refers to a repository [docker.io/microsoft/tufted-lamb]  
...  
--\> Deploying to Kubernetes  
--\> Status: DEPLOYED  
--\> Notes:  
    1. Get the application URL by running these commands:  
    NOTE: It may take a few minutes for the LoadBalancer IP to be available.  
          You can watch the status of by running 'kubectl get svc -w tufted-lamb-tufted-lamb'  
 export SERVICE\_IP=$(kubectl get svc --namespace default tufted-lamb-tufted-lamb -o jsonpath='{.status.loadBalancer.ingress[0].ip}')  
 echo [http://$SERVICE\_IP:80](http://%24service_ip/)

apiVersion: v1

kind: Service

metadata:

 name: account-service-production

 labels:

 app: account-service-production

 tier: service

 lb: private

spec:

 ports:

 - port: 8080

 name: http

 targetPort: 8080

 protocol: TCP

 selector:

 app: account-service

 tier: service

 track: production

frontend http-in

 bind \*:80

 log 127.0.0.1 local2 debug


 acl traffic\_internal hdr(X-Traffic-Group) -m str -i INTERNAL

 acl traffic\_free  hdr(X-Traffic-Group) -m str -i FREE

 acl traffic\_enterprise hdr(X-Traffic-Group) -m str -i ENTERPRISE


 use\_backend internal if traffic\_internal

 use\_backend canary if traffic\_free

 use\_backend enterprise if traffic\_enterprise


 default\_backend paid


backend internal

 balance roundrobin

 server internal-lb  user-resource-service-internal:8080 resolvers dns check inter 2000

backend canary

 balance roundrobin

 server canary-lb    user-resource-service-canary:8080 resolvers dns check inter 2000 weight 5

 server production-lb user-resource-service-production:8080 resolvers dns check inter 2000 weight 95

backend paid

 balance roundrobin

 server canary-paid-lb user-resource-service-paid:8080 resolvers dns check inter 2000 weight 5

 server production-lb user-resource-service-production:8080 resolvers dns check inter 2000 weight 95

backend enterprise

 balance roundrobin

 server production-lb user-resource-service-production:8080 resolvers dns check inter 2000 weight 100

➜  kubectl get clusterroles --namespace=kube-system

NAME                    KIND

admin ClusterRole.v1beta1.rbac.authorization.k8s.io

cluster-admin ClusterRole.v1beta1.rbac.authorization.k8s.io

edit ClusterRole.v1beta1.rbac.authorization.k8s.io

kubelet-api-admin ClusterRole.v1beta1.rbac.authorization.k8s.io

system:auth-delegator ClusterRole.v1beta1.rbac.authorization.k8s.io

system:basic-user ClusterRole.v1beta1.rbac.authorization.k8s.io

system:controller:attachdetach-controller ClusterRole.v1beta1.rbac.authorization.k8s.io

system:controller:certificate-controller ClusterRole.v1beta1.rbac.authorization.k8s.io

...

➜  kubectl run nginx --image=nginx:latest

➜  kubectl exec -it $(kubectl get pods -o jsonpath='{.items[0].metadata.name}') bash

➜  apt-get update && apt-get install -y curl

➜  curl -ik \

 -H "Authorization: Bearer $(cat /var/run/secrets/kubernetes.io/serviceaccount/token)" \

 https://kubernetes/api/v1/namespaces/default/pods

apiVersion: v1

kind: ConfigMap

metadata:

  name: kube-dns

  namespace: kube-system

data:

  stubDomains: |

    {“acme.local”: [“1.2.3.4”]}

  upstreamNameservers: |

    [“8.8.8.8”, “8.8.4.4”]

apiVersion: v1

kind: ConfigMap

metadata:

  name: kube-dns

  namespace: kube-system

data:

  stubDomains: |

    {“consul.local”: [“10.150.0.1”]}

apiVersion: v1

kind: ConfigMap

metadata:

  name: kube-dns

  namespace: kube-system

data:

  upstreamNameservers: |

    [“172.16.0.1”]




**Get involved**  

If you’d like to contribute or simply help provide feedback and drive the roadmap, [join our community](https://github.com/kubernetes/community#kubernetes-community). Specifically for network related conversations participate though one of these channels:  

- Chat with us on the Kubernetes [Slack network channel](https://kubernetes.slack.com/messages/sig-network/)
- Join our Special Interest Group, [SIG-Network](https://github.com/kubernetes/community/wiki/SIG-Network), which meets on Tuesdays at 14:00 PT
Thanks for your support and contributions. Read more in-depth posts on what's new in Kubernetes 1.6 [here](https://kubernetes.io/blog/2017/03/five-days-of-kubernetes-1-6).


- Post questions (or answer questions) on [Stack Overflow](http://stackoverflow.com/questions/tagged/kubernetes)
- Join the community portal for advocates on [K8sPort](http://k8sport.org/)
- Get involved with the Kubernetes project on [GitHub](https://github.com/kubernetes/kubernetes)
- Follow us on Twitter [@Kubernetesio](https://twitter.com/kubernetesio) for latest updates
- Connect with the community on [Slack](http://slack.k8s.io/)
- [Download](http://get.k8s.io/) Kubernetes

  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
          - matchExpressions:
            - key: "failure-domain.beta.kubernetes.io/zone"
              operator: In
              values: ["us-central1-a"]

  affinity:
    nodeAffinity:
      preferredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
          - matchExpressions:
            - key: "failure-domain.beta.kubernetes.io/zone"
              operator: In
              values: ["us-central1-a"]

  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
          - matchExpressions:
            - key: "failure-domain.beta.kubernetes.io/zone"
              operator: NotIn
              values: ["us-central1-a"]

kubectl taint nodes node1 key=value:NoSchedule

  tolerations:
  - key: "key"
    operator: "Equal"
    value: "value"
    effect: "NoSchedule"

affinity:
    podAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
      - labelSelector:
          matchExpressions:
          - key: service
            operator: In
            values: [“S1”]
        topologyKey: failure-domain.beta.kubernetes.io/zone

apiVersion: v1
kind: Pod
metadata:
  name: nginx
  labels:
    app: nginx
spec:
  schedulerName: my-scheduler
  containers:
  - name: nginx
    image: nginx:1.10

#!/bin/bash

SERVER='localhost:8001'

while true;

do

    for PODNAME in $(kubectl --server $SERVER get pods -o json | jq '.items[] | select(.spec.schedulerName == "my-scheduler") | select(.spec.nodeName == null) | .metadata.name' | tr -d '"')

;

    do

        NODES=($(kubectl --server $SERVER get nodes -o json | jq '.items[].metadata.name' | tr -d '"'))


        NUMNODES=${#NODES[@]}

        CHOSEN=${NODES[$[$RANDOM % $NUMNODES]]}

        curl --header "Content-Type:application/json" --request POST --data '{"apiVersion":"v1", "kind": "Binding", "metadata": {"name": "'$PODNAME'"}, "target": {"apiVersion": "v1", "kind"

: "Node", "name": "'$CHOSEN'"}}' http://$SERVER/api/v1/namespaces/default/pods/$PODNAME/binding/

        echo "Assigned $PODNAME to $CHOSEN"

    done

    sleep 1

done

apiVersion: v1

kind: PersistentVolumeClaim

metadata:

 name: mypvc

 namespace: testns

spec:

 accessModes:

 - ReadWriteOnce

 resources:

   requests:

     storage: 100Gi

 storageClassName: gold

apiVersion: v1

kind: PersistentVolumeClaim

metadata:

 name: mypvc

 namespace: testns

spec:

 accessModes:

 - ReadWriteOnce

 resources:

   requests:

     storage: 100Gi

kind: StorageClass

apiVersion: storage.k8s.io/v1

metadata:

 name: gold

provisioner: kubernetes.io/gce-pd

parameters:

 type: pd-ssd

$ kubectl get sc

NAME                 TYPE

gold                 kubernetes.io/gce-pd   

standard (default)   kubernetes.io/gce-pd

$ kubectl describe storageclass standard

Name:     standard

IsDefaultClass: Yes

Annotations: storageclass.beta.kubernetes.io/is-default-class=true

Provisioner: kubernetes.io/gce-pd

Parameters: type=pd-standard

Events:         \<none\>

sudo setsebool -P virt\_use\_nfs 1

sudo yum -y install nfs-utils libnfsidmap

sudo systemctl enable rpcbind nfs-server

sudo systemctl start rpcbind nfs-server rpc-statd nfs-idmapd

sudo mkdir /nfsfileshare

sudo chmod 777 /nfsfileshare/

sudo vi /etc/exports

sudo exportfs -r

/nfsfileshare 192.168.122.9(rw,sync)

cd $HOME

git clone https://github.com/CrunchyData/crunchy-containers.git

cd crunchy-containers/examples/kube/statefulset

docker pull crunchydata/crunchy-postgres:centos7-9.5-1.2.6

export BUILDBASE=$HOME/crunchy-containers

export CCP\_IMAGE\_TAG=centos7-9.5-1.2.6

./run.sh

$ kubectl get pod

NAME      READY     STATUS    RESTARTS   AGE

pgset-0   1/1       Running   0          2m

pgset-1   1/1       Running   1          2m

sudo yum -y install postgresql

psql -h pgset-master -U postgres postgres -c 'table pg\_stat\_replication'

psql -h pgset-replica -U postgres postgres  -c 'create table foo (id int)'

kubectl scale statefulset pgset --replicas=3

$ ls -l /nfsfileshare/

total 12

drwx------ 20   26   26 4096 Jan 17 16:35 pgset-0

drwx------ 20   26   26 4096 Jan 17 16:35 pgset-1

drwx------ 20   26   26 4096 Jan 17 16:48 pgset-2

yaml

apiVersion: batch/v1

kind: Job

metadata:

  name: PaddlePaddle-cluster-job

spec:

  parallelism: 3

  completions: 3

  template:

    metadata:

      name: PaddlePaddle-cluster-job

    spec:

      volumes:

      - name: jobpath

        hostPath:

          path: /home/admin/efs

      containers:

      - name: trainer

        image: your\_repo/paddle:mypaddle

        command: ["bin/bash",  "-c", "/root/start.sh"]

        env:

        - name: JOB\_NAME

          value: paddle-cluster-job

        - name: JOB\_PATH

          value: /home/jobpath

        - name: JOB\_NAMESPACE

          value: default

        volumeMounts:

        - name: jobpath

          mountPath: /home/jobpath

      restartPolicy: Never

$ export KUBERNETES\_PROVIDER=gce

$ export NUM\_NODES=3

$ export MULTIZONE=true

$ export ENABLE\_ETCD\_QUORUM\_READ=true

$ KUBE\_GCE\_ZONE=europe-west1-b ./cluster/kube-up.sh

$ KUBE\_USE\_EXISTING\_MASTER=true KUBE\_GCE\_ZONE=europe-west1-c ./cluster/kube-up.sh


$ KUBE\_USE\_EXISTING\_MASTER=true KUBE\_GCE\_ZONE=europe-west1-d ./cluster/kube-up.sh

$ KUBE\_GCE\_ZONE=europe-west1-c KUBE\_REPLICATE\_EXISTING\_MASTER=true ./cluster/kube-up.sh


$ KUBE\_GCE\_ZONE=europe-west1-d KUBE\_REPLICATE\_EXISTING\_MASTER=true ./cluster/kube-up.sh

$ kubectl get nodes

NAME                      STATUS                AGE

kubernetes-master         Ready,SchedulingDisabled 48m

kubernetes-master-2d4     Ready,SchedulingDisabled 5m

kubernetes-master-85f     Ready,SchedulingDisabled 32s

kubernetes-minion-group-6s52 Ready                 39m

kubernetes-minion-group-cw8e Ready                 48m

kubernetes-minion-group-fw91 Ready                 48m

kubernetes-minion-group-h2kn Ready                 31m

kubernetes-minion-group-ietm Ready                 39m

kubernetes-minion-group-j6lf Ready                 31m

kubernetes-minion-group-soj7 Ready                 31m

kubernetes-minion-group-tj82 Ready                 39m

kubernetes-minion-group-vd96 Ready                 48m

$ kubectl run nginx --image=nginx --expose --port=80

$ kubectl get pods

NAME                READY STATUS RESTARTS AGE

...

nginx-3449338310-m7fjm 1/1 Running 0     4s

...


$ kubectl run -i --tty test-a --image=busybox /bin/sh

If you don't see a command prompt, try pressing enter.

# wget -q -O- http://nginx.default.svc.cluster.local

...

\<title\>Welcome to nginx!\</title\>

...

$ gcloud compute ssh kubernetes-master-2d4 --zone=europe-west1-c

...

$ sudo halt

$ kubectl get nodes

NAME                      STATUS                   AGE

kubernetes-master         Ready,SchedulingDisabled 51m

kubernetes-master-2d4     NotReady,SchedulingDisabled 8m

kubernetes-master-85f     Ready,SchedulingDisabled 4m

...

$ kubectl run -i --tty test-b --image=busybox /bin/sh

If you don't see a command prompt, try pressing enter.

# wget -q -O- http://nginx.default.svc.cluster.local

...

\<title\>Welcome to nginx!\</title\>

...

$ kubectl run nginx-next --image=nginx --expose --port=80

$ kubectl run -i --tty test-c --image=busybox /bin/sh

If you don't see a command prompt, try pressing enter.

# wget -q -O- http://nginx-next.default.svc.cluster.local

...

\<title\>Welcome to nginx!\</title\>

...

$ gcloud compute instances start kubernetes-master-2d4 --zone=europe-west1-c

$ kubectl get nodes

NAME                      STATUS                AGE

kubernetes-master         Ready,SchedulingDisabled 57m

kubernetes-master-2d4     Ready,SchedulingDisabled 13m

kubernetes-master-85f     Ready,SchedulingDisabled 9m

...

$ KUBE\_DELETE\_NODES=false KUBE\_GCE\_ZONE=europe-west1-c ./cluster/kube-down.sh


$ KUBE\_DELETE\_NODES=false KUBE\_GCE\_ZONE=europe-west1-d ./cluster/kube-down.sh

$ KUBE\_USE\_EXISTING\_MASTER=true KUBE\_GCE\_ZONE=europe-west1-c ./cluster/kube-down.sh


$ KUBE\_USE\_EXISTING\_MASTER=true KUBE\_GCE\_ZONE=europe-west1-d ./cluster/kube-down.sh

$ KUBE\_GCE\_ZONE=europe-west1-b ./cluster/kube-down.sh

$ cat \> hello.py

def main(context):

 &nbsp;&nbsp;&nbsp;print "Hello, world!"


$ fission function create --name hello --env python --code hello.py --route /hello


$ curl http://\<fission router\>/hello

Hello, world!

gcloud container clusters create "test-cluster"

gcloud container clusters get-credentials test-cluster

git clone https://github.com/thesandlord/mongo-k8s-sidecar.git

cd /mongo-k8s-sidecar/example/StatefulSet/

kubectl apply -f googlecloud\_ssd.yaml

kubectl apply -f mongo-statefulset.yaml

kind: StorageClass
apiVersion: storage.k8s.io/v1beta1
metadata:
 name: fast
provisioner: kubernetes.io/gce-pd
parameters:
 type: pd-ssd

kubectl apply -f googlecloud\_ssd.yaml

apiVersion: v1
kind: Service
metadata:
  name: mongo
  labels:
    name: mongo
spec:
  ports:
    - port: 27017
      targetPort: 27017
  clusterIP: None
  selector:
    role: mongo

apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  name: mongo
spec:
  selector:
    matchLabels:
      role: mongo
      environment: test
  serviceName: "mongo"
  replicas: 3
  template:
    metadata:
      labels:
        role: mongo
        environment: test
    spec:
      terminationGracePeriodSeconds: 10
      containers:
      - name: mongo
        image: mongo
        command:
          - mongod
          - "--replSet"
          - rs0
          - "--smallfiles"
          - "--noprealloc"
        ports:
          - containerPort: 27017
        volumeMounts:
          - name: mongo-persistent-storage
            mountPath: /data/db
      - name: mongo-sidecar
        image: cvallance/mongo-k8s-sidecar
        env:
          - name: MONGO_SIDECAR_POD_LABELS
            value: "role=mongo,environment=test"
  volumeClaimTemplates:
    - metadata:
        name: mongo-persistent-storage
      spec:
        storageClassName: "fast"
        accessModes: ["ReadWriteOnce"]
        resources:
          requests:
            storage: 100Gi

kubectl get pods

NAME   READY STATUS RESTARTS AGE
mongo-0 2/2  Running 0     3m
mongo-1 2/2  Running 0     3m
mongo-2 2/2  Running 0     3m

mongo-0.mongo
mongo-1.mongo
mongo-2.mongo

mongodb://mongo-0.mongo,mongo-1.mongo,mongo-2.mongo:27017/dbname\_?

kubectl scale --replicas=5 statefulset mongo

kubectl delete statefulset mongo

kubectl delete svc mongo

kubectl delete pvc -l role=mongo

gcloud container clusters delete "test-cluster"

{

...  
  "paths": {

"/api/v1/namespaces/{namespace}/pods/{name}": {  
    "get": {  
     "description": "read the specified Pod",  
     "consumes": [  
      "\*/\*"  
     ],  
     "produces": [  
      "application/json",  
      "application/yaml",  
      "application/vnd.kubernetes.protobuf"  
     ],  
     "schemes": [  
      "https"  
     ],  
     "tags": [  
      "core\_v1"  
     ],  
     "operationId": "readCoreV1NamespacedPod",  
     "parameters": [  
      {  
       "uniqueItems": true,  
       "type": "boolean",  
       "description": "Should the export be exact.  Exact export maintains cluster-specific fields like 'Namespace'.",  
       "name": "exact",  
       "in": "query"  
      },  
      {  
       "uniqueItems": true,  
       "type": "boolean",  
       "description": "Should this value be exported.  Export strips fields that a user can not specify.",  
       "name": "export",  
       "in": "query"  
      }  
     ],  
     "responses": {  
      "200": {  
       "description": "OK",  
       "schema": {  
        "$ref": "#/definitions/v1.Pod"  
       }  
      },  
      "401": {  
       "description": "Unauthorized"  
      }  
     }  
    },

…

}

…

from kubernetes import client

ret = client.CoreV1Api().read\_namespaced\_pod(name="pods\_name", namespace="default")

GET /api/v1/namespaces/{namespace}/pods/{name}

(readCoreV1NamespacedPod)

read the specified Pod

Path parameters

name (required)

Path Parameter — name of the Pod

namespace (required)

Path Parameter — object name and auth scope, such as for teams and projects

Consumes

This API call consumes the following media types via the Content-Type request header:

-
\*/\*


Query parameters

pretty (optional)

Query Parameter — If 'true', then the output is pretty printed.

exact (optional)

Query Parameter — Should the export be exact. Exact export maintains cluster-specific fields like 'Namespace'.

export (optional)

Query Parameter — Should this value be exported. Export strips fields that a user can not specify.

Return type

v1.Pod


Produces

This API call produces the following media types according to the Accept request header; the media type will be conveyed by the Content-Type response header.

-
application/json
-
application/yaml
-
application/vnd.kubernetes.protobuf

Responses

200

OK v1.Pod

401

Unauthorized

$ cat 0-settings.sh && . 0-settings.sh

# this project create 3 clusters in 3 zones. FED\_HOST\_CLUSTER points to the one, which will be used to deploy federation control plane

export FED\_HOST\_CLUSTER=us-east1-b


# Google Cloud project name

export FED\_PROJECT=\<YOUR PROJECT e.g. company-project\>


# DNS suffix for this federation. Federated Service DNS names are published with this suffix. This must be a real domain name that you control and is programmable by one of the DNS providers (Google Cloud DNS or AWS Route53)

export FED\_DNS\_ZONE=\<YOUR DNS SUFFIX e.g. example.com\>

$ cat 1-create.sh && . 1-create.sh

gcloud container clusters create gce-us-east1-b --project=${FED\_PROJECT} --zone=us-east1-b --scopes cloud-platform,storage-ro,logging-write,monitoring-write,service-control,service-management,https://www.googleapis.com/auth/ndev.clouddns.readwrite


gcloud container clusters create gce-europe-west1-b --project=${FED\_PROJECT} --zone=europe-west1-b --scopes cloud-platform,storage-ro,logging-write,monitoring-write,service-control,service-management,https://www.googleapis.com/auth/ndev.clouddns.readwrite


gcloud container clusters create gce-asia-east1-a --project=${FED\_PROJECT} --zone=asia-east1-a --scopes cloud-platform,storage-ro,logging-write,monitoring-write,service-control,service-management,https://www.googleapis.com/auth/ndev.clouddns.readwrite

$ cat 2-getcredentials.sh && . 2-getcredentials.sh

gcloud -q container clusters get-credentials gce-us-east1-b --zone=us-east1-b --project=${FED\_PROJECT}


gcloud -q container clusters get-credentials gce-europe-west1-b --zone=europe-west1-b --project=${FED\_PROJECT}


gcloud -q container clusters get-credentials gce-asia-east1-a --zone=asia-east1-a --project=${FED\_PROJECT}

$ kubectl config get-contexts

CURRENT   NAME CLUSTER  AUTHINFO  NAMESPACE

\*         

gke\_container-solutions\_europe-west1-b\_gce-europe-west1-b

gke\_container-solutions\_europe-west1-b\_gce-europe-west1-b   

gke\_container-solutions\_europe-west1-b\_gce-europe-west1-b      

gke\_container-solutions\_us-east1-b\_gce-us-east1-b

gke\_container-solutions\_us-east1-b\_gce-us-east1-b           

gke\_container-solutions\_us-east1-b\_gce-us-east1-b

gke\_container-solutions\_asia-east1-a\_gce-asia-east1-a

gke\_container-solutions\_asia-east1-a\_gce-asia-east1-a  

gke\_container-solutions\_asia-east1-a\_gce-asia-east1-a

$ cat 3-initfed.sh && . 3-initfed.sh

kubefed init federation --host-cluster-context=gke\_${FED\_PROJECT}\_${FED\_HOST\_CLUSTER}\_gce-${FED\_HOST\_CLUSTER} --dns-zone-name=${FED\_DNS\_ZONE}

$ kubectl config get-contexts

CURRENT   NAME  CLUSTER  AUTHINFO NAMESPACE

...         

federation

federation

$ cat 4-joinfed.sh && . 4-joinfed.sh

kubefed --context=federation join cluster-europe-west1-b --cluster-context=gke\_${FED\_PROJECT}\_europe-west1-b\_gce-europe-west1-b --host-cluster-context=gke\_${FED\_PROJECT}\_${FED\_HOST\_CLUSTER}\_gce-${FED\_HOST\_CLUSTER}


kubefed --context=federation join cluster-asia-east1-a --cluster-context=gke\_${FED\_PROJECT}\_asia-east1-a\_gce-asia-east1-a --host-cluster-context=gke\_${FED\_PROJECT}\_${FED\_HOST\_CLUSTER}\_gce-${FED\_HOST\_CLUSTER}


kubefed --context=federation join cluster-us-east1-b --cluster-context=gke\_${FED\_PROJECT}\_us-east1-b\_gce-us-east1-b --host-cluster-context=gke\_${FED\_PROJECT}\_${FED\_HOST\_CLUSTER}\_gce-${FED\_HOST\_CLUSTER}

$ kubectl --context=federation get clusters

NAME                        STATUS    AGE

cluster-asia-east1-a        Ready     7s

cluster-europe-west1-b      Ready     10s

cluster-us-east1-b          Ready     10s

{"hostname":"k8shserver-6we2u","zone":"europe-west1-b"}

$ kubectl --context=federation create -f rs/k8shserver

$ kubectl --context=federation create -f service/k8shserver

kubectl --context=federation create -f ingress/k8shserver.yaml

apiVersion: extensions/v1beta1

kind: Ingress

metadata:

  name: k8shserver

spec:

  backend:

    serviceName: k8shserver

    servicePort: 80

$ kubectl --context=federation get ingress

NAME         HOSTS     ADDRESS          PORTS     AGE

k8shserver   \*         130.211.40.125   80        20m

$ curl 130.211.40.125

{"hostname":"k8shserver-w56n4","zone":"us-east1-b"}

{"hostname":"k8shserver-z31p1","zone":"eu-west1-b"}

$ . 5-destroy.sh

$ kubectl create -f [http://k8s.io/docs/tutorials/stateful-application/zookeeper.yaml](https://raw.githubusercontent.com/kubernetes/kubernetes.github.io/master/docs/tutorials/stateful-application/zookeeper.yaml)

service "zk-headless" created

configmap "zk-config" created

poddisruptionbudget "zk-budget" created

statefulset "zk" created

$ kubectl get -w -l app=zk

NAME      READY     STATUS    RESTARTS   AGE

zk-0      0/1       Pending   0          0s

zk-0      0/1       Pending   0         0s

zk-0      0/1       Pending   0         7s

zk-0      0/1       ContainerCreating   0         7s

zk-0      0/1       Running   0         38s

zk-0      1/1       Running   0         58s

zk-1      0/1       Pending   0         1s

zk-1      0/1       Pending   0         1s

zk-1      0/1       ContainerCreating   0         1s

zk-1      0/1       Running   0         33s

zk-1      1/1       Running   0         51s

zk-2      0/1       Pending   0         0s

zk-2      0/1       Pending   0         0s

zk-2      0/1       ContainerCreating   0         0s

zk-2      0/1       Running   0         25s

zk-2      1/1       Running   0         40s

$ for i in 0 1 2; do kubectl exec zk-$i -- hostname; done

zk-0

zk-1

zk-2

$ for i in 0 1 2; do echo "myid zk-$i";kubectl exec zk-$i -- cat /var/lib/zookeeper/data/myid; done

myid zk-0

1

myid zk-1

2

myid zk-2

3

$  for i in 0 1 2; do kubectl exec zk-$i -- hostname -f; done

zk-0.zk-headless.default.svc.cluster.local

zk-1.zk-headless.default.svc.cluster.local

zk-2.zk-headless.default.svc.cluster.local

$  kubectl exec zk-0 -- cat /opt/zookeeper/conf/zoo.cfg

clientPort=2181

dataDir=/var/lib/zookeeper/data

dataLogDir=/var/lib/zookeeper/log

tickTime=2000

initLimit=10

syncLimit=2000

maxClientCnxns=60

minSessionTimeout= 4000

maxSessionTimeout= 40000

autopurge.snapRetainCount=3

autopurge.purgeInteval=1

server.1=zk-0.zk-headless.default.svc.cluster.local:2888:3888

server.2=zk-1.zk-headless.default.svc.cluster.local:2888:3888

server.3=zk-2.zk-headless.default.svc.cluster.local:2888:3888

$  kubectl exec zk-0 zkCli.sh create /hello world

...


WATCHER::


WatchedEvent state:SyncConnected type:None path:null

Created /hello

$  kubectl exec zk-1 zkCli.sh get /hello

...


WATCHER::


WatchedEvent state:SyncConnected type:None path:null

world

...

$  kubectl delete statefulset zk

statefulset "zk" deleted

$  kubectl get pods -w -l app=zk

NAME      READY     STATUS    RESTARTS   AGE

zk-0      1/1       Running   0          14m

zk-1      1/1       Running   0          13m

zk-2      1/1       Running   0          12m

NAME      READY     STATUS        RESTARTS   AGE

zk-2      1/1       Terminating   0          12m

zk-1      1/1       Terminating   0         13m

zk-0      1/1       Terminating   0         14m

zk-2      0/1       Terminating   0         13m

zk-2      0/1       Terminating   0         13m

zk-2      0/1       Terminating   0         13m

zk-1      0/1       Terminating   0         14m

zk-1      0/1       Terminating   0         14m

zk-1      0/1       Terminating   0         14m

zk-0      0/1       Terminating   0         15m

zk-0      0/1       Terminating   0         15m

zk-0      0/1       Terminating   0         15m

$  kubectl apply -f [http://k8s.io/docs/tutorials/stateful-application/zookeeper.yaml](https://raw.githubusercontent.com/kubernetes/kubernetes.github.io/master/docs/tutorials/stateful-application/zookeeper.yaml)

service "zk-headless" configured

configmap "zk-config" configured

statefulset "zk" created

$  kubectl exec zk-2 zkCli.sh get /hello

...


WATCHER::


WatchedEvent state:SyncConnected type:None path:null

world

...

 {

              "podAntiAffinity": {

                "requiredDuringSchedulingRequiredDuringExecution": [{

                  "labelSelector": {

                    "matchExpressions": [{

                      "key": "app",

                      "operator": "In",

                      "values": ["zk-headless"]

                    }]

                  },

                  "topologyKey": "kubernetes.io/hostname"

                }]

              }

            }

}

$ kubectl get poddisruptionbudget zk-budget

NAME        MIN-AVAILABLE   ALLOWED-DISRUPTIONS   AGE

zk-budget   2               1                     2h

service RuntimeService {

    // Sandbox operations.

    rpc RunPodSandbox(RunPodSandboxRequest) returns (RunPodSandboxResponse) {}  
    rpc StopPodSandbox(StopPodSandboxRequest) returns (StopPodSandboxResponse) {}  
    rpc RemovePodSandbox(RemovePodSandboxRequest) returns (RemovePodSandboxResponse) {}  
    rpc PodSandboxStatus(PodSandboxStatusRequest) returns (PodSandboxStatusResponse) {}  
    rpc ListPodSandbox(ListPodSandboxRequest) returns (ListPodSandboxResponse) {}  

    // Container operations.  
    rpc CreateContainer(CreateContainerRequest) returns (CreateContainerResponse) {}  
    rpc StartContainer(StartContainerRequest) returns (StartContainerResponse) {}  
    rpc StopContainer(StopContainerRequest) returns (StopContainerResponse) {}  
    rpc RemoveContainer(RemoveContainerRequest) returns (RemoveContainerResponse) {}  
    rpc ListContainers(ListContainersRequest) returns (ListContainersResponse) {}  
    rpc ContainerStatus(ContainerStatusRequest) returns (ContainerStatusResponse) {}

    ...  
}

service RuntimeService {

    ...

    // ExecSync runs a command in a container synchronously.  
    rpc ExecSync(ExecSyncRequest) returns (ExecSyncResponse) {}  
    // Exec prepares a streaming endpoint to execute a command in the container.  
    rpc Exec(ExecRequest) returns (ExecResponse) {}  
    // Attach prepares a streaming endpoint to attach to a running container.  
    rpc Attach(AttachRequest) returns (AttachResponse) {}  
    // PortForward prepares a streaming endpoint to forward ports from a PodSandbox.  
    rpc PortForward(PortForwardRequest) returns (PortForwardResponse) {}

    ...  
}

$ minikube get-k8s-versions

$ minikube start --kubernetes-version=v1.5.0-beta.1 --extra-config=kubelet.EnableCRI=true --network-plugin=kubenet --extra-config=kubelet.PodCIDR=10.180.1.0/24 --iso-url=http://storage.googleapis.com/minikube/iso/buildroot/minikube-v0.0.6.iso

$ minikube logs | grep EnableCRI

I1209 01:48:51.150789    3226 localkube.go:116] Setting EnableCRI to true on kubelet.

$ kubectl run foo --image=gcr.io/google\_containers/pause-amd64:3.0

deployment "foo" created

$ kubectl describe pod foo

...

... From                Type   Reason          Message  
... -----------------   -----  --------------- -----------------------------

...{default-scheduler } Normal Scheduled       Successfully assigned foo-141968229-v1op9 to minikube  
...{kubelet minikube}   Normal SandboxReceived Pod sandbox received, it will be created.

...

version: "2"



services:

  redis-master:

    image: gcr.io/google\_containers/redis:e2e

    ports:

      - "6379"

  redis-slave:

    image: gcr.io/google\_samples/gb-redisslave:v1

    ports:

      - "6379"

    environment:

      - GET\_HOSTS\_FROM=dns

  frontend:

    image: gcr.io/google-samples/gb-frontend:v4

    ports:

      - "80:80"

    environment:

      - GET\_HOSTS\_FROM=dns

$ docker-compose -f docker-guestbook.yml up -d

Creating network "examples\_default" with the default driver

Creating examples\_redis-slave\_1

Creating examples\_frontend\_1

Creating examples\_redis-master\_1

$ kompose -f ./examples/docker-guestbook.yml up

We are going to create Kubernetes deployment and service for your dockerized application.

If you need more kind of controllers, use 'kompose convert' and 'kubectl create -f' instead.



INFO[0000] Successfully created service: redis-master

INFO[0000] Successfully created service: redis-slave

INFO[0000] Successfully created service: frontend

INFO[0000] Successfully created deployment: redis-master

INFO[0000] Successfully created deployment: redis-slave

INFO[0000] Successfully created deployment: frontend



Application has been deployed to Kubernetes. You can run 'kubectl get deployment,svc' for details.

$ kubectl get pods,svc,deployments

NAME                             READY        STATUS        RESTARTS     AGE

frontend-3780173733-0ayyx        1/1          Running       0            1m

redis-master-3028862641-8miqn    1/1          Running       0            1m

redis-slave-3788432149-t3ejp     1/1          Running       0            1m

NAME                             CLUSTER-IP   EXTERNAL-IP   PORT(S)      AGE

frontend                         10.0.0.34    \<none\>        80/TCP       1m

redis-master                     10.0.0.219   \<none\>        6379/TCP     1m

redis-slave                      10.0.0.84    \<none\>        6379/TCP     1m

NAME                             DESIRED      CURRENT       UP-TO-DATE



AVAILABLE   AGE

frontend                         1            1             1            1           1m

redis-master                     1            1             1            1           1m

redis-slave                      1            1             1            1           1m

apiVersion: extensions/v1beta1  
kind: DaemonSet  
metadata:  
  name: sematext-agent  
spec:  
  template:  
    metadata:  
      labels:  
        app: sematext-agent  
    spec:  
      selector: {}  
      dnsPolicy: "ClusterFirst"  
      restartPolicy: "Always"  
      containers:  
      - name: sematext-agent  
        image: sematext/sematext-agent-docker:latest  
        imagePullPolicy: "Always"  
        env:  
        - name: SPM\_TOKEN  
          value: "REPLACE THIS WITH YOUR SPM TOKEN"  
        - name: LOGSENE\_TOKEN  
          value: "REPLACE THIS WITH YOUR LOGSENE TOKEN"  
        - name: KUBERNETES  
          value: "1"  
        volumeMounts:  
          - mountPath: /var/run/docker.sock  
            name: docker-sock  
          - mountPath: /etc/localtime  
            name: localtime  
      volumes:  
        - name: docker-sock  
          hostPath:  
            path: /var/run/docker.sock  
        - name: localtime  
          hostPath:  
            path: /etc/localtime

\> kubectl create -f sematext-agent-daemonset.yml

daemonset "sematext-agent-daemonset" created

\> kubectl get pods

NAME                   READY     STATUS              RESTARTS   AGE

sematext-agent-nh4ez   0/1       ContainerCreating   0          6s

sematext-agent-s47vz   0/1       ImageNotReady       0          6s

\> kubectl get pods -l sematext-agent

NAME                   READY     STATUS    RESTARTS   AGE

sematext-agent-nh4ez   1/1       Running   0          8s

sematext-agent-s47vz   1/1       Running   0          8s

_____
/ Moo \
\---- /
       \   ^__^
        \  (oo)\_______
           (__)\       )\/\
               ||-----w |
               ||     ||

$ kubectl get pods                         # get pods to find pod ids

$ kubectl log -f service-1786497219-2rbt1  # pod 1

$ kubectl log -f service-1786497219-8kfbp  # pod 2

$ kubectl log -f service-1786497219-lttxd  # pod 3

$ kubectl get pods                                 # get pods to find pod ids

$ kubectl describe pod service-1786497219-2rbt1    # get containers in pod

$ kubectl log -f service-1786497219-2rbt1 server   # pod 1

$ kubectl log -f service-1786497219-2rbt1 gateway  # pod 1

$ kubectl log -f service-1786497219-8kfbp server   # pod 2

$ kubectl log -f service-1786497219-8kfbp gateway  # pod 2

$ kubectl log -f service-1786497219-lttxd server   # pod 3

$ kubectl log -f service-1786497219-lttxd gateway  # pod 3

$ stern service

$ stern service

+ service-1786497219-2rbt1 › server

+ service-1786497219-2rbt1 › gateway

+ service-1786497219-8kfbp › server

+ service-1786497219-8kfbp › gateway

+ service-1786497219-lttxd › server

+ service-1786497219-lttxd › gateway

+ service-1786497219-8kfbp server Log message from server

+ service-1786497219-2rbt1 gateway Log message from gateway

+ service-1786497219-8kfbp gateway Log message from gateway

+ service-1786497219-lttxd gateway Log message from gateway

+ service-1786497219-lttxd server Log message from server

+ service-1786497219-2rbt1 server Log message from server

 + stern --context staging --container gateway envvars

+ stern -t --since 15m auth

+ stern --context minikube some-new-feature

+ stern --namespace kube-system kubernetes-dashboard

$ kubectl --context=federation-cluster get clusters


NAME              STATUS    AGE  
gce-asia-east1-a     Ready     17m  
gce-asia-east1-b     Ready     15m  
gce-asia-east1-c     Ready     10m  
gce-europe-west1-b   Ready     7m  
gce-europe-west1-c   Ready     7m  
gce-europe-west1-d   Ready     4m  
gce-us-central1-a    Ready     1m  
gce-us-central1-b    Ready     53s  
gce-us-central1-c    Ready     39s

$ kubectl --context=federation-cluster create -f services/nginx.yaml

$ kubectl --context=federation-cluster describe services nginx


Name:                   nginx  
Namespace:              default  
Labels:                 app=nginx  
Selector:               app=nginx  
Type:                   LoadBalancer  
IP:  
LoadBalancer Ingress:   108.59.xx.xxx, 104.199.xxx.xxx, ...  
Port:                   http    80/TCP

NodePort:               http    30061/TCP  
Endpoints:              <none>  
Session Affinity:       None

$ cat ingress/ingress.yaml   

apiVersion: extensions/v1beta1  
kind: Ingress  
metadata:  
  name: nginx  
spec:  
  backend:  
    serviceName: nginx  
    servicePort: 80

$ kubectl --context=federation-cluster create -f ingress/ingress.yaml   
ingress "nginx" created

$ for c in $(kubectl config view -o jsonpath='{.contexts[*].name}'); do kubectl --context=$c get ingress; done  

NAME      HOSTS     ADDRESS   PORTS     AGE  
nginx     \*                   80        1h  
NAME      HOSTS     ADDRESS          PORTS     AGE  
nginx     \*         130.211.40.xxx   80        40m  
NAME      HOSTS     ADDRESS          PORTS     AGE  
nginx     \*         130.211.40.xxx   80        1h  
NAME      HOSTS     ADDRESS          PORTS     AGE  
nginx     \*         130.211.40.xxx   80        26m  
NAME      HOSTS     ADDRESS          PORTS     AGE  
nginx     \*         130.211.40.xxx   80        1h  
NAME      HOSTS     ADDRESS          PORTS     AGE  
nginx     \*         130.211.40.xxx   80        25m  
NAME      HOSTS     ADDRESS          PORTS     AGE  
nginx     \*         130.211.40.xxx   80        38m  
NAME      HOSTS     ADDRESS          PORTS     AGE  
nginx     \*         130.211.40.xxx   80        3m  
NAME      HOSTS     ADDRESS          PORTS     AGE  
nginx     \*         130.211.40.xxx   80        57m  
NAME      HOSTS     ADDRESS          PORTS     AGE  
nginx     \*         130.211.40.xxx   80        56m

$ for c in $(kubectl config view -o jsonpath='{.contexts[\*].name}'); do kubectl --context=$c create -f configmaps/zonefetch.yaml; done

$ cat replicasets/nginx-rs.yaml


apiVersion: extensions/v1beta1  
kind: ReplicaSet  
metadata:  
  name: nginx  
  labels:  
    app: nginx  
    type: demo  
spec:  
  replicas: 9  
  template:  
    metadata:  
      labels:  
        app: nginx  
    spec:  
      containers:  
      - image: nginx  
        name: frontend  
        ports:  
          - containerPort: 80  
        volumeMounts:  
        - name: html-dir  
          mountPath: /usr/share/nginx/html  
      - image: busybox  
        name: zone-fetcher  
        command:  
          - "/bin/sh"  
          - "-c"  
          - "/zonefetch/zonefetch.sh"  
        volumeMounts:  
        - name: zone-fetch  
          mountPath: /zonefetch  
        - name: html-dir  
          mountPath: /usr/share/nginx/html  
      volumes:  
        - name: zone-fetch  
          configMap:  
            defaultMode: 0777  
            name: zone-fetch  
        - name: html-dir  
          emptyDir:  
            medium: ""

apiVersion: extensions/v1beta1  
kind: ReplicaSet  
metadata:  
  name: nginx-us  
  annotations:  
    federation.kubernetes.io/replica-set-preferences: ```  
        {  
            "rebalance": true,  
            "clusters": {  
                "gce-us-central1-a": {  
                    "minReplicas": 2,  
                    "maxReplicas": 4,  
                    "weight": 1  
                },  
                "gce-us-central10b": {  
                    "minReplicas": 2,  
                    "maxReplicas": 4,  
                    "weight": 1  
                }  
            }  
        }

$ kubectl --context=federation-cluster create -f replicasets/nginx-rs.yaml

$ for c in $(kubectl config view -o jsonpath='{.contexts[\*].name}'); do kubectl --context=$c get rs; done  

NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         42s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         14m  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         45s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         46s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         47s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         48s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         49s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         49s  
NAME      DESIRED   CURRENT   READY     AGE  
nginx     1         1         1         49s


$ for c in $(kubectl config view -o jsonpath='{.contexts[\*].name}'); do kubectl --context=$c get po; done  

NAME          READY     STATUS    RESTARTS   AGE  
nginx-ph8zx   2/2       Running   0          25s  
NAME          READY     STATUS    RESTARTS   AGE  
nginx-sbi5b   2/2       Running   0          27s  
NAME          READY     STATUS    RESTARTS   AGE  
nginx-pf2dr   2/2       Running   0          28s  
NAME          READY     STATUS    RESTARTS   AGE  
nginx-imymt   2/2       Running   0          30s  
NAME          READY     STATUS    RESTARTS   AGE  
nginx-9cd5m   2/2       Running   0          31s  
NAME          READY     STATUS    RESTARTS   AGE  
nginx-vxlx4   2/2       Running   0          33s  
NAME          READY     STATUS    RESTARTS   AGE  
nginx-itagl   2/2       Running   0          33s  
NAME          READY     STATUS    RESTARTS   AGE  
nginx-u7uyn   2/2       Running   0          33s  
NAME          READY     STATUS    RESTARTS   AGE  
nginx-i0jh6   2/2       Running   0          34s

$ gcloud compute ssh test-instance-asia --zone asia-east1-a

-----

user@test-instance-asia:~$ curl 130.211.40.186  
<!DOCTYPE html>  
<html>  
<head>  
<title>Welcome to the global site!</title>  
</head>  
<body>  
<h1>Welcome to the global site! You are being served from asia-east1-b</h1>  
<p>Congratulations!</p>


user@test-instance-asia:~$ exit

----


$ gcloud compute ssh test-instance-us --zone us-west1-b

----

user@test-instance-us:~$ curl 130.211.40.186  
<!DOCTYPE html>  
<html>  
<head>  
<title>Welcome to the global site!</title>  
</head>  
<body>  
<h1>Welcome to the global site! You are being served from us-central1-b</h1>  
<p>Congratulations!</p>


----

$ helm search  
NAME VERSION DESCRIPTION stable/drupal 0.3.1 One of the most versatile open source content m...stable/jenkins 0.1.0 A Jenkins Helm chart for Kubernetes. stable/mariadb 0.4.0 Chart for MariaDB stable/mysql 0.1.0 Chart for MySQL stable/redmine 0.3.1 A flexible project management web application. stable/wordpress 0.3.0 Web publishing platform for building blogs and ...

$ helm install stable/jenkins

Notes:



1. Get your 'admin' user password by running:

  printf $(printf '\%o' `kubectl get secret --namespace default brawny-frog-jenkins -o jsonpath="{.data.jenkins-admin-password[*]}"`);echo



2. Get the Jenkins URL to visit by running these commands in the same shell:

\*\*\*\* NOTE: It may take a few minutes for the LoadBalancer IP to be available.                      \*\*\*\*

\*\*\*\*       You can watch the status of by running 'kubectl get svc -w brawny-frog-jenkins' \*\*\*\*

  export SERVICE\_IP=$(kubectl get svc --namespace default brawny-frog-jenkins -o jsonpath='{.status.loadBalancer.ingress[0].ip}')

  echo http://$SERVICE\_IP:8080/login

kind: StorageClass

apiVersion: storage.k8s.io/v1beta1

metadata:

  name: slow

provisioner: kubernetes.io/gce-pd

parameters:

  type: pd-standard

kind: StorageClass

apiVersion: storage.k8s.io/v1beta1

metadata:

  name: fast

provisioner: kubernetes.io/gce-pd

parameters:

  type: pd-ssd

{

  "kind": "PersistentVolumeClaim",

  "apiVersion": "v1",

  "metadata": {

    "name": "claim1",

    "annotations": {

        "volume.beta.kubernetes.io/storage-class": "fast"

    }

  },

  "spec": {

    "accessModes": [

      "ReadWriteOnce"

    ],

    "resources": {

      "requests": {

        "storage": "30Gi"

      }

    }

  }

}

apiVersion: extensions/v1beta1  
kind: NetworkPolicy  
metadata:  
 name: pol1  
spec:  
 podSelector:  
   matchLabels:  
     role: backend  
 ingress:  
 - from:  
   - podSelector:  
      matchLabels:  
       role: frontend  
   ports:  
   - protocol: tcp  
     port: 80

helm init

cd crunchy-containers/examples/kubehelm

helm install ./crunchy-postgres

kubectl get services  
NAME              CLUSTER-IP   EXTERNAL-IP   PORT(S)    AGE  
crunchy-master    10.0.0.171   \<none\>        5432/TCP   1h  
crunchy-replica   10.0.0.31    \<none\>        5432/TCP   1h  
kubernetes        10.0.0.1     \<none\>        443/TCP    1h

psql -h crunchy-master -U postgres postgres -c 'table pg\_stat\_replication'

psql -h crunchy-master -U postgres postgres -c 'create table foo (id int)'

psql -h crunchy-master -U postgres postgres -c 'insert into foo values (1)'

psql -h crunchy-replica -U postgres postgres -c 'table foo'

kubectl scale rc crunchy-replica --replicas=2

{

  "apiVersion": "abac.authorization.kubernetes.io/v1beta1",

  "kind": "Policy",

  "spec": {

    "user": "alice",

    "namespace": "fronto",

    "resource": "pods",

    "readonly": true

  }

}

apiVersion: v1  
kind: ResourceQuota  
metadata:  
  name: compute-resources  
spec:  
  hard:  
    pods: "4"  
    requests.cpu: "1"  
    requests.memory: 1Gi  
    limits.cpu: "2"  
    limits.memory: 2Gi

kubectl create -f ./compute-resources.yaml --namespace=myspace

POST /apis/net.alpha.kubernetes.io/v1alpha1/namespaces/tenant-a/networkpolicys  
{  
  "kind": "NetworkPolicy",

  "metadata": {

    "name": "pol1"

  },

  "spec": {

    "allowIncoming": {

      "from": [{

        "pods": { "segment": "frontend" }

      }],

      "toPorts": [{

        "port": 80,

        "protocol": "TCP"

      }]

    },

    "podSelector": {

      "segment": "backend"

    }

  }

}

apiVersion: v1  
kind: Pod  
metadata:  
  name: hello-world  
spec:  
  containers:  
  # specification of the pod’s containers  
  # ...  
  securityContext:  
    readOnlyRootFilesystem: true  
    runAsNonRoot: true

 apiVersion: v1

 kind: PersistentVolume

 metadata:

   name: pv-datera-0

 spec:

   capacity:

     storage: 100Gi

   accessModes:

     - ReadWriteOnce

   persistentVolumeReclaimPolicy: Retain

   flexVolume:

     driver: "datera/iscsi"

     fsType: "xfs"

     options:

       volumeID: "kube-pv-datera-0"

       size: “100"

       replica: "3"

       backstoreServer: "[tlx170.tlx.daterainc.com](http://tlx170.tlx.daterainc.com/):7717”

[root@tlx241 /]# kubectl get pv

NAME          CAPACITY   ACCESSMODES   STATUS      CLAIM     REASON    AGE

pv-datera-0   100Gi        RWO         Available                       8s

pv-datera-1   100Gi        RWO         Available                       2s

pv-datera-2   100Gi        RWO         Available                       7s

pv-datera-3   100Gi        RWO         Available                       4s

kind: PersistentVolumeClaim

apiVersion: v1

metadata:

 name: pv-claim-test-petset-0

spec:

 accessModes:

   - ReadWriteOnce

 resources:

   requests:

     storage: 100Gi

[root@tlx241 /]# kubectl get pv

NAME          CAPACITY   ACCESSMODES   STATUS      CLAIM                            REASON    AGE

pv-datera-0   100Gi      RWO           Bound       default/pv-claim-test-petset-0             6m

pv-datera-1   100Gi      RWO           Bound       default/pv-claim-test-petset-1             6m

pv-datera-2   100Gi      RWO           Available                                              7s

pv-datera-3   100Gi      RWO           Available                                              4s


[root@tlx241 /]# kubectl get pvc

NAME                     STATUS    VOLUME        CAPACITY   ACCESSMODES   AGE

pv-claim-test-petset-0   Bound     pv-datera-0   0                        3m

pv-claim-test-petset-1   Bound     pv-datera-1   0                        3m

apiVersion: v1

kind: Pod

metadata:

 name: kube-pv-demo

spec:

 containers:

 - name: data-pv-demo

   image: nginx

   volumeMounts:

   - name: test-kube-pv1

     mountPath: /data

   ports:

   - containerPort: 80

 volumes:

 - name: test-kube-pv1

   persistentVolumeClaim:

     claimName: pv-claim-test-petset-0

[root@tlx241 /]# kubectl describe pods kube-pv-demo

Name:       kube-pv-demo

Namespace:  default

Node:       tlx243/172.19.1.243

Start Time: Sun, 14 Aug 2016 19:17:31 -0700

Labels:     \<none\>

Status:     Running

IP:         10.40.0.3

Controllers: \<none\>

Containers:

 data-pv-demo:

   Container ID: [docker://ae2a50c25e03143d0dd721cafdcc6543fac85a301531110e938a8e0433f74447](about:blank)

   Image:   nginx

   Image ID: [docker://sha256:0d409d33b27e47423b049f7f863faa08655a8c901749c2b25b93ca67d01a470d](about:blank)

   Port:    80/TCP

   State:   Running

     Started:  Sun, 14 Aug 2016 19:17:34 -0700

   Ready:   True

   Restart Count:  0

   Environment Variables:  \<none\>

Conditions:

 Type           Status

 Initialized    True

 Ready          True

 PodScheduled   True

Volumes:

 test-kube-pv1:

   Type:  PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)

   ClaimName:   pv-claim-test-petset-0

   ReadOnly:    false

 default-token-q3eva:

   Type:        Secret (a volume populated by a Secret)

   SecretName:  default-token-q3eva

   QoS Tier:  BestEffort

Events:

 FirstSeen LastSeen Count From SubobjectPath Type Reason Message

 --------- -------- ----- ---- ------------- -------- ------ -------

 43s 43s 1 {default-scheduler } Normal Scheduled Successfully assigned kube-pv-demo to tlx243

 42s 42s 1 {kubelet tlx243} spec.containers{data-pv-demo} Normal Pulling pulling image "nginx"

 40s 40s 1 {kubelet tlx243} spec.containers{data-pv-demo} Normal Pulled Successfully pulled image "nginx"

 40s 40s 1 {kubelet tlx243} spec.containers{data-pv-demo} Normal Created Created container with docker id ae2a50c25e03

 40s 40s 1 {kubelet tlx243} spec.containers{data-pv-demo} Normal Started Started container with docker id ae2a50c25e03

[root@tlx243 ~]# lsscsi

[0:2:0:0]    disk    SMC      SMC2208          3.24  /dev/sda

[11:0:0:0]   disk    DATERA   IBLOCK           4.0   /dev/sdb


[root@tlx243 datera~iscsi]# mount  ``` grep sdb

/dev/sdb on /var/lib/kubelet/pods/6b99bd2a-628e-11e6-8463-0cc47ab41442/volumes/datera~iscsi/pv-datera-0 type xfs (rw,relatime,attr2,inode64,noquota)

[root@tlx241 /]# kubectl exec kube-pv-demo -c data-pv-demo -it bash

root@kube-pv-demo:/# mount  ``` grep data

/dev/sdb on /data type xfs (rw,relatime,attr2,inode64,noquota)

# A headless service to create DNS records

apiVersion: v1

kind: Service

metadata:

 name: test-service

 labels:

   app: nginx

spec:

 ports:

 - port: 80

   name: web

 clusterIP: None

 selector:

   app: nginx

---

apiVersion: apps/v1alpha1

kind: PetSet

metadata:

 name: test-petset

spec:

 serviceName: "test-service"

 replicas: 2

 template:

   metadata:

     labels:

       app: nginx

     annotations:

       [pod.alpha.kubernetes.io/initialized:](http://pod.alpha.kubernetes.io/initialized:) "true"

   spec:

     terminationGracePeriodSeconds: 0

     containers:

     - name: nginx

       image: [gcr.io/google\_containers/nginx-slim:0.8](http://gcr.io/google_containers/nginx-slim:0.8)

       ports:

       - containerPort: 80

         name: web

       volumeMounts:

       - name: pv-claim

         mountPath: /data

 volumeClaimTemplates:

 - metadata:

     name: pv-claim

     annotations:

       [volume.alpha.kubernetes.io/storage-class:](http://volume.alpha.kubernetes.io/storage-class:) anything

   spec:

     accessModes: ["ReadWriteOnce"]

     resources:

       requests:

         storage: 100Gi

[root@tlx241 /]# kubectl get pvc

NAME                     STATUS    VOLUME        CAPACITY   ACCESSMODES   AGE

pv-claim-test-petset-0   Bound     pv-datera-0   0                        41m

pv-claim-test-petset-1   Bound     pv-datera-1   0                        41m

pv-claim-test-petset-2   Bound     pv-datera-2   0                        5s

pv-claim-test-petset-3   Bound     pv-datera-3   0                        2s

[root@tlx241 /]# kubectl get pods

NAMESPACE     NAME                        READY     STATUS    RESTARTS   AGE

default       test-petset-0               1/1       Running   0          7s

default       test-petset-1               1/1       Running   0          3s

[root@tlx241 /]# kubectl describe petset test-petset

Name: test-petset

Namespace: default

Image(s): [gcr.io/google\_containers/nginx-slim:0.8](http://gcr.io/google_containers/nginx-slim:0.8)

Selector: app=nginx

Labels: app=nginx

Replicas: 2 current / 2 desired

Annotations: \<none\>

CreationTimestamp: Sun, 14 Aug 2016 19:46:30 -0700

Pods Status: 2 Running / 0 Waiting / 0 Succeeded / 0 Failed

No volumes.

No events.

[root@tlx241 /]# kubectl patch petset test-petset -p'{"spec":{"replicas":"3"}}'

"test-petset” patched


[root@tlx241 /]# kubectl describe petset test-petset

Name: test-petset

Namespace: default

Image(s): [gcr.io/google\_containers/nginx-slim:0.8](http://gcr.io/google_containers/nginx-slim:0.8)

Selector: app=nginx

Labels: app=nginx

Replicas: 3 current / 3 desired

Annotations: \<none\>

CreationTimestamp: Sun, 14 Aug 2016 19:46:30 -0700

Pods Status: 3 Running / 0 Waiting / 0 Succeeded / 0 Failed

No volumes.

No events.


[root@tlx241 /]# kubectl get pods

NAME                        READY     STATUS    RESTARTS   AGE

test-petset-0               1/1       Running   0          29m

test-petset-1               1/1       Running   0          28m

test-petset-2               1/1       Running   0          9s

apiVersion: v1  
kind: ReplicationController  
metadata:  
  name: couchbase-master-rc  
spec:  
  replicas: 1  
  selector:  
    app: couchbase-master-pod  
  template:  
    metadata:  
      labels:  
        app: couchbase-master-pod  
    spec:  
      containers:  
      - name: couchbase-master  
        image: arungupta/couchbase:k8s  
        env:  
          - name: TYPE  
            value: MASTER  
        ports:  
        - containerPort: 8091  
----  
apiVersion: v1  
kind: Service  
metadata:   
  name: couchbase-master-service  
  labels:   
    app: couchbase-master-service  
spec:   
  ports:  
    - port: 8091  
  selector:   
    app: couchbase-master-pod  
  type: LoadBalancer

kubectl create -f cluster-master.yml   
replicationcontroller "couchbase-master-rc" created  
service "couchbase-master-service" created

kubectl get svc  
NAME                       CLUSTER-IP    EXTERNAL-IP   PORT(S)    AGE  
couchbase-master-service   10.0.57.201                 8091/TCP   30s  
kubernetes                 10.0.0.1      \<none\>        443/TCP    5h

kubectl get po  
NAME                        READY     STATUS    RESTARTS   AGE  
couchbase-master-rc-97mu5   1/1       Running   0          1m

kubectl get rc  
NAME                  DESIRED   CURRENT   AGE  
couchbase-master-rc   1         1         1m

kubectl describe svc couchbase-master-service  
Name: couchbase-master-service  
Namespace: default  
Labels: app=couchbase-master-service  
Selector: app=couchbase-master-pod  
Type: LoadBalancer  
IP: 10.0.57.201  
LoadBalancer Ingress: a94f1f286590c11e68e100283628cd6c-1110696566.us-west-2.elb.amazonaws.com  
Port: \<unset\> 8091/TCP  
NodePort: \<unset\> 30019/TCP  
Endpoints: 10.244.2.3:8091  
Session Affinity: None  
Events:

  FirstSeen LastSeen Count From SubobjectPath Type Reason Message

  --------- -------- ----- ---- ------------- -------- ------ -------

  2m 2m 1 {service-controller } Normal CreatingLoadBalancer Creating load balancer

  2m 2m 1 {service-controller } Normal CreatedLoadBalancer Created load balancer

apiVersion: v1  
kind: ReplicationController  
metadata:  
  name: couchbase-worker-rc  
spec:  
  replicas: 1  
  selector:  
    app: couchbase-worker-pod  
  template:  
    metadata:  
      labels:  
        app: couchbase-worker-pod  
    spec:  
      containers:  
      - name: couchbase-worker  
        image: arungupta/couchbase:k8s  
        env:  
          - name: TYPE  
            value: "WORKER"  
          - name: COUCHBASE\_MASTER  
            value: "couchbase-master-service"  
          - name: AUTO\_REBALANCE  
            value: "false"  
        ports:  
        - containerPort: 8091

kubectl create -f cluster-worker.yml   
replicationcontroller "couchbase-worker-rc" created

kubectl get rc  
NAME                  DESIRED   CURRENT   AGE  
couchbase-master-rc   1         1         6m  
couchbase-worker-rc   1         1         22s

kubectl get po  
NAME                        READY     STATUS    RESTARTS   AGE  
couchbase-master-rc-97mu5   1/1       Running   0          6m  
couchbase-worker-rc-4ik02   1/1       Running   0          46s

kubectl scale rc couchbase-worker-rc --replicas=3  
replicationcontroller "couchbase-worker-rc" scaled

kubectl get rc  
NAME                  DESIRED   CURRENT   AGE  
couchbase-master-rc   1         1         8m  
couchbase-worker-rc   3         3         2m

kubectl get po  
NAME                        READY     STATUS    RESTARTS   AGE  
couchbase-master-rc-97mu5   1/1       Running   0          8m  
couchbase-worker-rc-4ik02   1/1       Running   0          2m  
couchbase-worker-rc-jfykx   1/1       Running   0          53s  
couchbase-worker-rc-v8vdw   1/1       Running   0          53s

gcloud container clusters create gce-asia-east1 \

  --scopes cloud-platform \

  --zone asia-east1-b

gcloud container clusters create gce-europe-west1 \

  --scopes cloud-platform \

  --zone=europe-west1-b

gcloud container clusters create gce-us-east1 \

  --scopes cloud-platform \

  --zone=us-east1-b

gcloud container clusters create gce-us-central1 \

  --scopes cloud-platform \

  --zone=us-central1-b

gcloud container clusters list

NAME              ZONE            MASTER\_VERSION  MASTER\_IP       NUM\_NODES  STATUS  
gce-asia-east1    asia-east1-b    1.2.4           104.XXX.XXX.XXX 3          RUNNING  
gce-europe-west1  europe-west1-b  1.2.4           130.XXX.XX.XX   3          RUNNING  
gce-us-central1   us-central1-b   1.2.4           104.XXX.XXX.XX  3          RUNNING  
gce-us-east1      us-east1-b      1.2.4           104.XXX.XX.XXX  3          RUNNING

kubectl --context=federation-cluster get clusters

NAME               STATUS    VERSION   AGE  
gce-asia-east1     Ready               1m  
gce-europe-west1   Ready               57s  
gce-us-central1    Ready               47s  
gce-us-east1       Ready               34s

kubectl --context=federation-cluster create -f services/nginx.yaml

kubectl --context=gce-asia-east1a get svc nginx  
NAME      CLUSTER-IP     EXTERNAL-IP      PORT(S)   AGE  
nginx     10.63.250.98   104.199.136.89   80/TCP    9m

kubectl --context=federation-cluster describe services nginx  

Name:                   nginx  
Namespace:              default  
Labels:                 run=nginx  
Selector:               run=nginx  
Type:                   LoadBalancer  
IP:           
LoadBalancer Ingress:   104.XXX.XX.XXX, 104.XXX.XX.XXX, 104.XXX.XX.XXX, 104.XXX.XXX.XX  
Port:                   http    80/TCP  
Endpoints:              \<none\>  
Session Affinity:       None  
No events.

for CLUSTER in asia-east1-a europe-west1-a us-east1-a us-central1-a  
do  
kubectl --context=$CLUSTER run nginx --image=nginx:1.11.1-alpine --port=80  
done

$ gcloud dns managed-zones describe example-dot-com   

creationTime: '2016-06-26T18:18:39.229Z'  
description: Example domain for Kubernetes Cluster Federation  
dnsName: example.com.  
id: '3229332181334243121'  
kind: dns#managedZone  
name: example-dot-com  
nameServers:  
- ns-cloud-a1.googledomains.com.  
- ns-cloud-a2.googledomains.com.  
- ns-cloud-a3.googledomains.com.  
- ns-cloud-a4.googledomains.com.  

$ gcloud dns record-sets list --zone example-dot-com  

NAME                                                                                                 TYPE      TTL     DATA  
example.com.                                                                                       NS     21600  ns-cloud-e1.googledomains.com., ns-cloud-e2.googledomains.com.  
example.com.                                                                                      SOA     21600 ns-cloud-e1.googledomains.com. cloud-dns-hostmaster.google.com. 1 21600 3600 1209600 300  
nginx.mynamespace.myfederation.svc.example.com.                            A     180     104.XXX.XXX.XXX, 130.XXX.XX.XXX, 104.XXX.XX.XXX, 104.XXX.XXX.XX  
nginx.mynamespace.myfederation.svc.us-central1-a.example.com.     A     180     104.XXX.XXX.XXX  
nginx.mynamespace.myfederation.svc.us-central1.example.com.  
nginx.mynamespace.myfederation.svc.us-central1.example.com.         A    180     104.XXX.XXX.XXX, 104.XXX.XXX.XXX, 104.XXX.XXX.XXX  
nginx.mynamespace.myfederation.svc.asia-east1-a.example.com.       A    180     130.XXX.XX.XXX  
nginx.mynamespace.myfederation.svc.asia-east1.example.com.  
nginx.mynamespace.myfederation.svc.asia-east1.example.com.           A    180     130.XXX.XX.XXX, 130.XXX.XX.XXX  
nginx.mynamespace.myfederation.svc.europe-west1.example.com.  CNAME    180   nginx.mynamespace.myfederation.svc.example.com.  
... etc.

$aws route53 list-hosted-zones

and

$aws route53 list-resource-record-sets --hosted-zone-id Z3ECL0L9QLOVBX

eu.nginx.acme.com        CNAME nginx.mynamespace.myfederation.svc.europe-west1.example.com.  
us.nginx.acme.com        CNAME nginx.mynamespace.myfederation.svc.us-central1.example.com.  
nginx.acme.com             CNAME nginx.mynamespace.myfederation.svc.example.com.

apiVersion: v1

kind: Service

metadata:

  labels:

    app: cassandra

  name: cassandra

spec:

  clusterIP: None

  ports:

    - port: 9042

  selector:

    app: cassandra-data

----

# new API name

apiVersion: "apps/v1alpha1"

kind: PetSet

metadata:

  name: cassandra

spec:

  serviceName: cassandra

  # replicas are the same as used by Replication Controllers

  # except pets are deployed in order 0, 1, 2, 3, etc

  replicas: 5

  template:

    metadata:

      annotations:

        pod.alpha.kubernetes.io/initialized: "true"

      labels:

        app: cassandra-data

    spec:

      # just as other component in Kubernetes one

      # or more containers are deployed

      containers:

      - name: cassandra

        image: "cassandra-debian:v1.1"

        imagePullPolicy: Always

        ports:

        - containerPort: 7000

          name: intra-node

        - containerPort: 7199

          name: jmx

        - containerPort: 9042

          name: cql

        resources:

          limits:

            cpu: "4"

            memory: 11Gi

          requests:

           cpu: "4"

           memory: 11Gi

        securityContext:

          privileged: true

        env:

          - name: MAX\_HEAP\_SIZE

            value: 8192M

          - name: HEAP\_NEWSIZE

            value: 2048M

          # this is relying on guaranteed network identity of Pet Sets, we

          # will know the name of the Pets / Pod before they are created

          - name: CASSANDRA\_SEEDS

            value: "cassandra-0.cassandra.default.svc.cluster.local,cassandra-1.cassandra.default.svc.cluster.local"

          - name: CASSANDRA\_CLUSTER\_NAME

            value: "OneKDemo"

          - name: CASSANDRA\_DC

            value: "DC1-Data"

          - name: CASSANDRA\_RACK

            value: "OneKDemo-Rack1-Data"

          - name: CASSANDRA\_AUTO\_BOOTSTRAP

            value: "false"

          # this variable is used by the read-probe looking

          # for the IP Address in a `nodetool status` command

          - name: POD\_IP

            valueFrom:

              fieldRef:

                fieldPath: status.podIP

        readinessProbe:

          exec:

            command:

            - /bin/bash

            - -c

            - /ready-probe.sh

          initialDelaySeconds: 15

          timeoutSeconds: 5

        # These volume mounts are persistent. They are like inline claims,

        # but not exactly because the names need to match exactly one of

        # the pet volumes.

        volumeMounts:

        - name: cassandra-data

          mountPath: /cassandra\_data

  # These are converted to volume claims by the controller

  # and mounted at the paths mentioned above.  Storage can be automatically

  # created for the Pets depending on the cloud environment.

  volumeClaimTemplates:

  - metadata:

      name: cassandra-data

      annotations:

        volume.alpha.kubernetes.io/storage-class: anything

    spec:

      accessModes: ["ReadWriteOnce"]

      resources:

        requests:
          storage: 380Gi

apiVersion: batch/v1

kind: Job

metadata:

  name: pet-race-giants

  labels:

    name: pet-races

spec:

  parallelism: 2

  completions: 4

  template:

    metadata:

      name: pet-race-giants

      labels:

        name: pet-races

    spec:

      containers:

      - name: pet-race-giants

        image: py3numpy-job:v1.0

        command: ["pet-race-job", --length=100", "--pet=Giants", "--scale=3"]

        resources:

          limits:

            cpu: "2"

          requests:

            cpu: "2"

      restartPolicy: Never

export NUM\_NODES=2

export KUBE\_AUTOSCALER\_MIN\_NODES=2

export KUBE\_AUTOSCALER\_MAX\_NODES=5

export KUBE\_ENABLE\_CLUSTER\_AUTOSCALER=true

./cluster/kube-up.sh

$ kubectl get nodes

NAME                           STATUS                     AGE

kubernetes-master              Ready,SchedulingDisabled   2m

kubernetes-minion-group-de5q   Ready                      2m

kubernetes-minion-group-yhdx   Ready                      1m

$ kubectl run php-apache \   

  --image=gcr.io/google\_containers/hpa-example \

  --requests=cpu=500m,memory=500M --expose --port=80  

service "php-apache" createddeployment "php-apache" created

$ kubectl get deployment

NAME         DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE

php-apache   1         1         1            1           49s



$ kubectl get pods  
NAME                          READY     STATUS    RESTARTS   AGE

php-apache-2046965998-z65jn   1/1       Running   0          30s

$ kubectl run -i --tty service-test --image=busybox /bin/sh  
Hit enter for command prompt  
$ wget -q -O- http://php-apache.default.svc.cluster.local

OK!

$ kubectl autoscale deployment php-apache --cpu-percent=50 --min=1 --max=10

$ kubectl get hpa

NAME         REFERENCE                     TARGET    CURRENT   MINPODS   MAXPODS   AGE

php-apache   Deployment/php-apache/scale   50%       0%        1         20        14s

$ kubectl run -i --tty load-generator --image=busybox /bin/sh  
Hit enter for command prompt  
$ while true; do wget -q -O- http://php-apache.default.svc.cluster.local; done

$ kubectl get hpa

NAME         REFERENCE                     TARGET    CURRENT   MINPODS   MAXPODS   AGE

php-apache   Deployment/php-apache/scale   50%       310%      1         20        2m



$ kubectl get deployment php-apache

NAME              DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE

php-apache        7         7         7            3           4m

jsz@jsz-desk2:~/k8s-src$ kubectl get pods

php-apache-2046965998-3ewo6        0/1       Pending   0          1m

php-apache-2046965998-8m03k        1/1       Running   0          1m

php-apache-2046965998-ddpgp        1/1       Running   0          5m

php-apache-2046965998-lrik6        1/1       Running   0          1m

php-apache-2046965998-nj465        0/1       Pending   0          1m

php-apache-2046965998-tmwg1        1/1       Running   0          1m

php-apache-2046965998-xkbw1        0/1       Pending   0          1m

$ kubectl describe pod php-apache-2046965998-3ewo6

Name: php-apache-2046965998-3ewo6

Namespace: default

...

Events:

  FirstSeen From SubobjectPath Type Reason Message



  1m {default-scheduler } Warning FailedScheduling pod (php-apache-2046965998-3ewo6) failed to fit in any node

fit failure on node (kubernetes-minion-group-yhdx): Insufficient CPU

fit failure on node (kubernetes-minion-group-de5q): Insufficient CPU



  1m {cluster-autoscaler } Normal TriggeredScaleUp pod triggered scale-up, mig: kubernetes-minion-group, sizes (current/new): 2/3

$ kubectl get nodes

NAME                           STATUS                     AGE

kubernetes-master              Ready,SchedulingDisabled   9m

kubernetes-minion-group-6z5i   Ready                      43s

kubernetes-minion-group-de5q   Ready                      9m

kubernetes-minion-group-yhdx   Ready                      9m

$ kubectl get pods

NAME                               READY     STATUS    RESTARTS   AGE

php-apache-2046965998-3ewo6        1/1       Running   0          3m

php-apache-2046965998-8m03k        1/1       Running   0          3m

php-apache-2046965998-ddpgp        1/1       Running   0          7m

php-apache-2046965998-lrik6        1/1       Running   0          3m

php-apache-2046965998-nj465        1/1       Running   0          3m

php-apache-2046965998-tmwg1        1/1       Running   0          3m

php-apache-2046965998-xkbw1        1/1       Running   0          3m

$ kubectl get hpa

NAME         REFERENCE                     TARGET    CURRENT   MINPODS   MAXPODS   AGE

php-apache   Deployment/php-apache/scale   50%       0%        1         10        16m



$ kubectl get deployment php-apache

NAME              DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE

php-apache        1         1         1            1           14m

$ kubectl get nodes

NAME                           STATUS                     AGE

kubernetes-master              Ready,SchedulingDisabled   37m

kubernetes-minion-group-de5q   Ready                      36m

kubernetes-minion-group-yhdx   Ready                      36m

apiVersion: extensions/v1beta1

kind: Ingress

metadata:

 name: scalelb

 annotations:

 scale: "2"

spec:

  rules:

  - host: foo.bar.com

    http:

      paths:

      - path: /foo

        backend:

          serviceName: nginx-service

          servicePort: 80

kubectl get ingress

NAME      RULE          BACKEND   ADDRESS

scalelb      -                    104.154.107.202, 104.154.107.203  // hosts ip addresses where Rancher LB instances are deployed

          foo.bar.com

          /foo           nginx-service:80

# service mongo pointing to pods created by PetSet mdb, with identities mdb-1, mdb-2, mdb-3


dig mongodb.namespace.svc.cluster.local +short A

172.130.16.50


dig mdb-1.mongodb.namespace.svc.cluster.local +short A

# IP of pod created for mdb-1


dig mdb-2.mongodb.namespace.svc.cluster.local +short A

# IP of pod created for mdb-2


dig mdb-3.mongodb.namespace.svc.cluster.local +short A

# IP of pod created for mdb-3

$ minikube start

Starting local Kubernetes cluster...

Kubernetes is available at https://192.168.99.100:443

Kubectl is now configured to use the cluster

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface

10.8.0.0        10.8.0.2        255.255.255.0   UG    0      0        0 tun0

10.8.0.2        0.0.0.0         255.255.255.255 UH    0      0        0 tun0

10.244.1.0      10.8.0.2        255.255.255.0   UG    0      0        0 tun0

10.244.2.0      10.8.0.2        255.255.255.0   UG    0      0        0 tun0

172.18.0.0      0.0.0.0         255.255.0.0     U     0      0        0 cbr0

10.8.0.0        10.8.0.5        255.255.255.0   UG    0      0        0 tun0

10.8.0.5        0.0.0.0         255.255.255.255 UH    0      0        0 tun0

10.244.1.0      0.0.0.0         255.255.255.0   U     0      0        0 cbr0

10.244.2.0      10.8.0.5        255.255.255.0   UG    0      0        0 tun0

10.8.0.0        10.8.0.9        255.255.255.0   UG    0      0        0 tun0

10.8.0.9        0.0.0.0         255.255.255.255 UH    0      0        0 tun0

10.244.1.0      10.8.0.9        255.255.255.0   UG    0      0        0 tun0

10.244.2.0      0.0.0.0         255.255.255.0   U     0      0        0 cbr0  

apiVersion: v1  
kind: Network  
metadata:  
  name: net1  
spec:  
  tenantID: 065f210a2ca9442aad898ab129426350  
  subnets:  
    subnet1:  
      cidr: 192.168.0.0/24  
      gateway: 192.168.0.1

apiVersion: v1  
kind: Namespace  
metadata:  
  name: ns1  
spec:  
  network: net1

apiVersion: v1  
kind: Pod  
metadata:  
  name: nginx  
  labels:  
    app: nginx  
spec:  
  containers:  
  - name: nginx  
    image: nginx  
    ports:  
    - containerPort: 80  
    volumeMounts:  
    - name: nginx-persistent-storage  
      mountPath: /var/lib/nginx  
  volumes:  
  - name: nginx-persistent-storage  
    cinder:  
      volumeID: 651b2a7b-683e-47e1-bdd6-e3c62e8f91c0  
      fsType: ext4

kind: ThirdPartyResource

apiVersion: extensions/v1beta1

metadata:

 &nbsp;name: network-policy.net.alpha.kubernetes.io

description: "Network policy specification"

versions:

- name: v1alpha1

$kubectl create -f third-party-res-def.yaml

/net.alpha.kubernetes.io/v1alpha1/namespace/default/networkpolicys/

net.alpha.kubernetes.io/network-isolation: [on | off]

POST /apis/net.alpha.kubernetes.io/v1alpha1/namespaces/tenant-a/networkpolicys/


{

"kind": "NetworkPolicy",

"metadata": {

"name": "pol1"

},

"spec": {

"allowIncoming": {

"from": [

{ "pods": { "segment": "frontend" } }

],

"toPorts": [

{ "port": 80, "protocol": "TCP" }

]

},

"podSelector": { "segment": "backend" }

}

}

externalDNSName: my-cluster.kubernetes.coreos.com

createRecordSet: true

hostedZone: kubernetes.coreos.com

recordSetTTL: 300

vpcId: vpc-xxxxx

routeTableId: rtb-xxxxx

#cloud-config

coreos:

  flannel:  
    interrface: $private\_ipv4  
    etcd\_endpoints: {{ .ETCDEndpoints }}

apiVersion: v1

kind: ConfigMap

metadata:

  Name: example-configmap

data:

  # property-like keys

  game-properties-file-name: game.properties

  ui-properties-file-name: ui.properties

  # file-like keys

  game.properties: |

    enemies=aliens

    lives=3

    enemies.cheat=true

    enemies.cheat.level=noGoodRotten

    secret.code.passphrase=UUDDLRLRBABAS

    secret.code.allowed=true

    secret.code.lives=30

  ui.properties: |

    color.good=purple

    color.bad=yellow

    allow.textmode=true

    how.nice.to.look=fairlyNice

    $ kubectl create configmap my-config \

    --from-literal=literal-key=literal-value \

    --from-file=ui.properties \
    --from=file=path/to/config/dir

apiVersion: extensions/v1beta1

kind: Deployment

metadata:

  name: configmap-example-deployment

  labels:

    name: configmap-example-deployment

spec:

  replicas: 1

  selector:

    matchLabels:

      name: configmap-example

  template:

    metadata:

      labels:

        name: configmap-example

    spec:

      containers:

      - name: game-container

        image: imaginarygame

        command: ["game-server", "--config-dir=/etc/game/cfg"]

        env:

        # consume the property-like keys in environment variables

        - name: GAME\_PROPERTIES\_NAME

          valueFrom:

            configMapKeyRef:

              name: example-configmap

              key: game-properties-file-name

        - name: UI\_PROPERTIES\_NAME

          valueFrom:

            configMapKeyRef:

              name: example-configmap

              key: ui-properties-file-name

        volumeMounts:

        - name: config-volume

          mountPath: /etc/game

      volumes:

      # consume the file-like keys of the configmap via volume plugin

      - name: config-volume

        configMap:

          name: example-configmap

          items:

          - key: ui.properties

            path: cfg/ui.properties

         - key: game.properties

           path: cfg/game.properties
      restartPolicy: Never

$ kubectl proxy --www=docs/user-guide/update-demo/local/ &  

$ kubectl run update-demo   
--image=gcr.io/google\_containers/update-demo:nautilus --port=80 -l name=update-demo  

deployment “update-demo” created  

 $ kubectl edit deployment/update-demo  

 This opens up your default editor, and you can update the deployment on the fly. Find .spec.template.spec.containers[0].image and change nautilus to kitty. Save the file, and you’ll see:  

 deployment "update-demo" edited   

$ kubectl describe pod/update-demo-1326485872-a4key  

$ kubectl rollout undo deployment/update-demo   
deployment "update-demo" rolled back  

$ kubectl edit deployment/update-demo  
deployment "update-demo" edited  

$ kubectl describe deployment/update-demo  

$ kubectl run echoheaders   
--image=gcr.io/google\_containers/echoserver:1.3 --port=8080  
$ kubectl expose deployment echoheaders --target-port=8080   
--type=NodePort  

$ NODE_IP=$(kubectl get node `kubectl get po -l run=echoheaders 
--template '{{range .items}}{{.spec.nodeName}}{{end}}'` --template
'{{range $i, $n := .status.addresses}}{{if eq $n.type 
"ExternalIP"}}{{$n.address}}{{end}}{{end}}')
$ NODE_PORT=$(kubectl get svc echoheaders --template '{{range $i, $e 
:= .spec.ports}}{{$e.nodePort}}{{end}}')
$ curl $NODE_IP:$NODE_PORT

$ openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout   

/tmp/tls.key -out /tmp/tls.crt -subj "/CN=echoheaders/O=echoheaders"

$ echo "  
apiVersion: v1  
kind: Secret  
metadata:
  name: tls  
data:  
  tls.crt: `base64 -w 0 /tmp/tls.crt`  
  tls.key: `base64 -w 0 /tmp/tls.key`  
" | kubectl create -f   

$ echo "

apiVersion: extensions/v1beta1

kind: Ingress

metadata:

  name: test

spec:

  tls:

  - secretName: tls
  backend:  
    serviceName: echoheaders  
    servicePort: 8080  
" | kubectl create -f -  

$ kubectl get ing   
NAME      RULE      BACKEND            ADDRESS         AGE  
test      -         echoheaders:8080   130.X.X.X     4m  

$ curl 130.X.X.X  
\<html\>  
\<head\>\<title\>301 Moved Permanently\</title\>\</head\>\<body bgcolor="white"\>\<center\>\<h1\>301 Moved Permanently\</h1\>\</center\>  

$ curl https://130.X.X.X -kCLIENT VALUES:client\_address=10.48.0.1command=GETreal path=/  


$ curl 130.X.X.X -Lk

CLIENT VALUES:client\_address=10.48.0.1command=GETreal path=/

$ gcloud container clusters create spark --scopes storage-full
--machine-type n1-standard-4

$ git clone https://github.com/kubernetes/kubernetes.git
$ kubectl create -f kubernetes/examples/spark

$ kubectl get pods
NAME READY STATUS RESTARTS AGE
spark-master-controller-v4v4y 1/1 Running 0 21h
spark-worker-controller-7phix 1/1 Running 0 21h
spark-worker-controller-hq9l9 1/1 Running 0 21h
spark-worker-controller-vwei5 1/1 Running 0 21h
zeppelin-controller-t1njl 1/1 Running 0 21h

$ kubectl port-forward zeppelin-controller-t1njl 8080:8080

https://gist.githubusercontent.com/zmerlynn/875fed0f587d12b08ec9/raw/6
eac83e99caf712482a4937800b17bbd2e7b33c4/movies.json

$ gsutil mb gs://my-spark-models

$ kubectl autoscale --min=1 --cpu-percent=80 --max=10 \
  rc/spark-worker-controller

curl -sS https://get.k8s.io | MULTIZONE=true KUBERNETES_PROVIDER=gce
KUBE_GCE_ZONE=us-central1-a NUM_NODES=3 bash

curl -sS https://get.k8s.io | MULTIZONE=true KUBERNETES_PROVIDER=aws
KUBE_AWS_ZONE=us-west-2a NUM_NODES=3 bash

$ kubectl get nodes --show-labels

NAME STATUS AGE LABELS
kubernetes-master Ready,SchedulingDisabled 6m        
beta.kubernetes.io/instance-type=n1-standard-1,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-a,kub
ernetes.io/hostname=kubernetes-master
kubernetes-minion-87j9 Ready 6m        
beta.kubernetes.io/instance-type=n1-standard-2,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-a,kub
ernetes.io/hostname=kubernetes-minion-87j9
kubernetes-minion-9vlv Ready 6m        
beta.kubernetes.io/instance-type=n1-standard-2,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-a,kub
ernetes.io/hostname=kubernetes-minion-9vlv
kubernetes-minion-a12q Ready 6m        
beta.kubernetes.io/instance-type=n1-standard-2,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-a,kub
ernetes.io/hostname=kubernetes-minion-a12q

KUBE_USE_EXISTING_MASTER=true MULTIZONE=true KUBERNETES_PROVIDER=gce
KUBE_GCE_ZONE=us-central1-b NUM_NODES=3 kubernetes/cluster/kube-up.sh

KUBE_USE_EXISTING_MASTER=true MULTIZONE=true KUBERNETES_PROVIDER=aws
KUBE_AWS_ZONE=us-west-2b NUM_NODES=3 KUBE_SUBNET_CIDR=172.20.1.0/24
MASTER_INTERNAL_IP=172.20.0.9 kubernetes/cluster/kube-up.sh

$ kubectl get nodes --show-labels

NAME STATUS AGE LABELS
kubernetes-master Ready,SchedulingDisabled 16m       
beta.kubernetes.io/instance-type=n1-standard-1,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-a,kub
ernetes.io/hostname=kubernetes-master
kubernetes-minion-281d Ready 2m        
beta.kubernetes.io/instance-type=n1-standard-2,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-b,kub
ernetes.io/hostname=kubernetes-minion-281d
kubernetes-minion-87j9 Ready 16m       
beta.kubernetes.io/instance-type=n1-standard-2,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-a,kub
ernetes.io/hostname=kubernetes-minion-87j9
kubernetes-minion-9vlv Ready 16m       
beta.kubernetes.io/instance-type=n1-standard-2,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-a,kub
ernetes.io/hostname=kubernetes-minion-9vlv
kubernetes-minion-a12q Ready 17m       
beta.kubernetes.io/instance-type=n1-standard-2,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-a,kub
ernetes.io/hostname=kubernetes-minion-a12q
kubernetes-minion-pp2f Ready 2m        
beta.kubernetes.io/instance-type=n1-standard-2,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-b,kub
ernetes.io/hostname=kubernetes-minion-pp2f
kubernetes-minion-wf8i Ready 2m        
beta.kubernetes.io/instance-type=n1-standard-2,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-b,kub
ernetes.io/hostname=kubernetes-minion-wf8i

KUBE_USE_EXISTING_MASTER=true MULTIZONE=true KUBERNETES_PROVIDER=gce
KUBE_GCE_ZONE=us-central1-f NUM_NODES=3 kubernetes/cluster/kube-up.sh

KUBE_USE_EXISTING_MASTER=true MULTIZONE=true KUBERNETES_PROVIDER=aws
KUBE_AWS_ZONE=us-west-2c NUM_NODES=3 KUBE_SUBNET_CIDR=172.20.2.0/24
MASTER_INTERNAL_IP=172.20.0.9 kubernetes/cluster/kube-up.sh

kubectl get nodes --show-labels

kubectl create -f guestbook-go/

$ kubectl describe pod -l app=guestbook | grep Node
Node: kubernetes-minion-9vlv/10.240.0.5
Node: kubernetes-minion-281d/10.240.0.8
Node: kubernetes-minion-olsh/10.240.0.11

$ kubectl get node kubernetes-minion-9vlv kubernetes-minion-281d 
kubernetes-minion-olsh --show-labels
NAME STATUS AGE LABELS
kubernetes-minion-9vlv Ready 34m       
beta.kubernetes.io/instance-type=n1-standard-2,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-a,kub
ernetes.io/hostname=kubernetes-minion-9vlv
kubernetes-minion-281d Ready 20m       
beta.kubernetes.io/instance-type=n1-standard-2,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-b,kub
ernetes.io/hostname=kubernetes-minion-281d
kubernetes-minion-olsh Ready 3m        
beta.kubernetes.io/instance-type=n1-standard-2,failure-domain.beta.kubernetes.
io/region=us-central1,failure-domain.beta.kubernetes.io/zone=us-central1-f,kub
ernetes.io/hostname=kubernetes-minion-olsh

$ kubectl describe service guestbook | grep LoadBalancer.Ingress
LoadBalancer Ingress: 130.211.126.21

ip=130.211.126.21

$ curl -s http://${ip}:3000/env | grep HOSTNAME
  "HOSTNAME": "guestbook-44sep",

$ (for i in `seq 20`; do curl -s http://${ip}:3000/env | grep HOSTNAME; done)  

| sort | uniq
  "HOSTNAME": "guestbook-44sep",
  "HOSTNAME": "guestbook-hum5n",
  "HOSTNAME": "guestbook-ppm40",

KUBERNETES_PROVIDER=gce KUBE_USE_EXISTING_MASTER=true 
KUBE_GCE_ZONE=us-central1-f kubernetes/cluster/kube-down.sh
KUBERNETES_PROVIDER=gce KUBE_USE_EXISTING_MASTER=true 
KUBE_GCE_ZONE=us-central1-b kubernetes/cluster/kube-down.sh
KUBERNETES_PROVIDER=gce KUBE_GCE_ZONE=us-central1-a 
kubernetes/cluster/kube-down.sh

KUBERNETES_PROVIDER=aws KUBE_USE_EXISTING_MASTER=true KUBE_AWS_ZONE=us-west-2c 
kubernetes/cluster/kube-down.sh
KUBERNETES_PROVIDER=aws KUBE_USE_EXISTING_MASTER=true KUBE_AWS_ZONE=us-west-2b 
kubernetes/cluster/kube-down.sh
KUBERNETES_PROVIDER=aws KUBE_AWS_ZONE=us-west-2a 
kubernetes/cluster/kube-down.sh

"labels": {
  "key1" : "value1",
  "key2" : "value2"
}

* March 10-11 in London.  Venue to be announced this week.

$ kubectl run leader-elector --image=gcr.io/google_containers/leader-elector:0.4 --replicas=3 -- --election=example

$ kubectl get pods
NAME                   READY     STATUS    RESTARTS   AGE
leader-elector-inmr1   1/1       Running   0          13s
leader-elector-qkq00   1/1       Running   0          13s
leader-elector-sgwcq   1/1       Running   0          13s

${pod_name}, (e.g. leader-elector-inmr1 from the above)

$ kubectl logs -f ${name}
leader is (leader-pod-name)

$ kubectl get endpoints example -o yaml

$ kubectl delete pods (leader-pod-name)

# delete the old leader elector group
$ kubectl delete rc leader-elector

# create the new group, note the --http=localhost:4040 flag
$ kubectl run leader-elector --image=gcr.io/google_containers/leader-elector:0.4 --replicas=3 -- --election=example --http=0.0.0.0:4040

# create a proxy to your Kubernetes api server
$ kubectl proxy

{"name":"(name-of-leader-here)"}

var http = require('http');
// This will hold info about the current master
var master = {};

  // The web handler for our nodejs application
  var handleRequest = function(request, response) {
    response.writeHead(200);
    response.end("Master is " + master.name);
  };

  // A callback that is used for our outgoing client requests to the sidecar
  var cb = function(response) {
    var data = '';
    response.on('data', function(piece) { data = data + piece; });
    response.on('end', function() { master = JSON.parse(data); });
  };

  // Make an async request to the sidecar at http://localhost:4040
  var updateMaster = function() {
    var req = http.get({host: 'localhost', path: '/', port: 4040}, cb);
    req.on('error', function(e) { console.log('problem with request: ' + e.message); });
    req.end();
  };

  / / Set up regular updates
  updateMaster();
  setInterval(updateMaster, 5000);

  // set up the web server
  var www = http.createServer(handleRequest);
  www.listen(8080);

$ curl -L -o k8s-on-rpi.zip https://github.com/awassink/k8s-on-rpi/archive/master.zip

$ apt-get update

$ apt-get install unzip

$ unzip k8s-on-rpi.zip

$ k8s-on-rpi-master/install-k8s-master.sh

$ ps -ef|grep docker
root       302     1  0 04:37 ?        00:00:14 /usr/bin/docker daemon -H unix:///var/run/docker-bootstrap.sock -p /var/run/docker-bootstrap.pid --storage-driver=overlay --storage-opt dm.basesize=10G --iptables=false --ip-masq=false --bridge=none --graph=/var/lib/docker-bootstrap

root       722     1 11 04:38 ?        00:16:11 /usr/bin/docker -d -bip=10.0.97.1/24 -mtu=1472 -H fd:// --storage-driver=overlay -D

$ docker -H unix:///var/run/docker-bootstrap.sock ps

CONTAINER ID        IMAGE                        COMMAND                  CREATED             STATUS              PORTS               NAMES

4855cc1450ff        andrewpsuedonym/flanneld     "flanneld --etcd-endp"   2 hours ago         Up 2 hours                              k8s-flannel

ef410b986cb3        andrewpsuedonym/etcd:2.1.1   "/bin/etcd --addr=127"   2 hours ago         Up 2 hours                              k8s-etcd


The hyperkube kubelet, apiserver, scheduler, controller and proxy must be up.

$ docker ps

CONTAINER ID        IMAGE                                           COMMAND                  CREATED             STATUS              PORTS               NAMES

a17784253dd2        gcr.io/google\_containers/hyperkube-arm:v1.1.2   "/hyperkube controller"   2 hours ago         Up 2 hours                              k8s\_controller-manager.7042038a\_k8s-master-127.0.0.1\_default\_43160049df5e3b1c5ec7bcf23d4b97d0\_2174a7c3

a0fb6a169094        gcr.io/google\_containers/hyperkube-arm:v1.1.2   "/hyperkube scheduler"   2 hours ago         Up 2 hours                              k8s\_scheduler.d905fc61\_k8s-master-127.0.0.1\_default\_43160049df5e3b1c5ec7bcf23d4b97d0\_511945f8

d93a94a66d33        gcr.io/google\_containers/hyperkube-arm:v1.1.2   "/hyperkube apiserver"   2 hours ago         Up 2 hours                              k8s\_apiserver.f4ad1bfa\_k8s-master-127.0.0.1\_default\_43160049df5e3b1c5ec7bcf23d4b97d0\_b5b4936d

db034473b334        gcr.io/google\_containers/hyperkube-arm:v1.1.2   "/hyperkube kubelet -"   2 hours ago         Up 2 hours                              k8s-master

f017f405ff4b        gcr.io/google\_containers/hyperkube-arm:v1.1.2   "/hyperkube proxy --m"   2 hours ago         Up 2 hours                              k8s-master-proxy

$ curl -fsSL -o /usr/bin/kubectl https://dl.k8s.io/release/v1.1.2/bin/linux/arm/kubectl

$ kubectl get nodes

NAME              LABELS                                   STATUS    AGE

127.0.0.1         kubernetes.io/hostname=127.0.0.1         Ready      1h


An easy way to test the cluster is by running a busybox docker image for ARM. kubectl run can be used to run the image as a container in a pod. kubectl get pods shows the pods that are registered with its status.

$ kubectl run busybox --image=hypriot/rpi-busybox-httpd

$ kubectl get pods -o wide

NAME                   READY     STATUS    RESTARTS   AGE       NODE

busybox-fry54          1/1       Running   1          1h        127.0.0.1

k8s-master-127.0.0.1   3/3       Running   6          1h        127.0.0.1

$ kubectl expose rc busybox --port=90 --target-port=80 --external-ip=\<ip-address-master-node\>

$ kubectl get svc

NAME         CLUSTER\_IP   EXTERNAL\_IP       PORT(S)   SELECTOR      AGE

busybox      10.0.0.87    192.168.192.161   90/TCP    run=busybox   1h

kubernetes   10.0.0.1     \<none\>            443/TCP   \<none\>        2h

$ curl http://10.0.0.87:90/

\<html\>

\<head\>\<title\>Pi armed with Docker by Hypriot\</title\>

  \<body style="width: 100%; background-color: black;"\>

    \<div id="main" style="margin: 100px auto 0 auto; width: 800px;"\>

      \<img src="pi\_armed\_with\_docker.jpg" alt="pi armed with docker" style="width: 800px"\>

    \</div\>

  \</body\>

\</html\>

$ curl -L -o k8s-on-rpi.zip https://github.com/awassink/k8s-on-rpi/archive/master.zip

$ apt-get update

$ apt-get install unzip

$ unzip k8s-on-rpi.zip

$ mkdir /etc/kubernetes

$ cp k8s-on-rpi-master/rootfs/etc/kubernetes/k8s.conf /etc/kubernetes/k8s.conf

$ k8s-on-rpi-master/install-k8s-worker.sh

$ kubectl get nodes

NAME              LABELS                                   STATUS    AGE

127.0.0.1         kubernetes.io/hostname=127.0.0.1         Ready     2h

192.168.192.160   kubernetes.io/hostname=192.168.192.160   Ready     1h

$ kubectl scale --replicas=2 rc/busybox

$ kubectl get pods -o wide

NAME                   READY     STATUS    RESTARTS   AGE       NODE

busybox-fry54          1/1       Running   1          1h        127.0.0.1

busybox-j2slu          1/1       Running   0          1h        192.168.192.160

k8s-master-127.0.0.1   3/3       Running   6          2h        127.0.0.1

kubernetes_pod { 'sample-pod':
  ensure => present,
  metadata => {
    namespace => 'default',
  },
  spec => {
    containers => [{
      name => 'container-name',
      image => 'nginx',
    }]
  },

puppet apply pod.pp

guestbook { 'myguestbook':
  redis_slave_replicas => 2,
  frontend_replicas => 3,
  redis_master_image => 'redis',
  redis_slave_image => 'gcr.io/google_samples/gb-redisslave:v1',
  frontend_image => 'gcr.io/google_samples/gb-frontend:v3',     
}

$> kubectl run -i --tty busybox --image=busybox --restart=Never -- sh
Waiting for pod default/busybox-tv9rm to be running, status is Pending, pod ready: false
Waiting for pod default/busybox-tv9rm to be running, status is Running, pod ready: false
$> # ls 
bin dev etc home proc root sys tmp usr var 
$> # exit

$> kubectl logs -f redis-izl09

$> kubectl attach redis -i

1:C 12 Oct 23:05:11.848 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf

                _._                
           _.-``__''-._            
      _.-`` `. `_. ''-._ Redis 3.0.3 (00000000/0) 64 bit
  .-`` .-```. ```\/ _.,_ ''-._     
 ( ' , .-` | `, ) Running in standalone mode
 |`-._`-...-` __...-.``-._|'` _.-'| Port: 6379
 | `-._ `._ / _.-' | PID: 1
  `-._ `-._ `-./ _.-' _.-'         
 |`-._`-._ `-.__.-' _.-'_.-'|      
 | `-._`-._ _.-'_.-' | http://redis.io
`-._ `-._`-.__.-'_.-' _.-'         
 |`-._`-._ `-.__.-' _.-'_.-'|      
 | `-._`-._ _.-'_.-' |             
  `-._ `-._`-.__.-'_.-' _.-'       
      `-._ `-.__.-' _.-'           
          `-._ _.-'                
              `-.__.-'             

1:M 12 Oct 23:05:11.849 # Server started, Redis version 3.0.3

$> kubectl port-forward redis-izl09 6379

$> telnet localhost 6379 
INCR foo
:1
INCR foo 
:2

$> kubectl exec redis-izl09 -- ls /
bin
boot
data
dev
entrypoint.sh
etc
home

`$> kubectl label pods redis-izl09 mylabel=awesome `
`pod "redis-izl09" labeled`

$> kubectl annotate pods redis-izl09 icon-url=http://goo.gl/XXBTWq
pod "redis-izl09" annotated

$> cat cols.tmpl
RESTARTS                                   NAME
.status.containerStatuses[0].restartCount .metadata.name

$> kubectl get pods redis-izl09 -o=custom-columns-file --template=cols.tmpl                 RESTARTS           NAME   
 0                  redis-izl09   
 1                  redis-abl42  

$> kubectl config use-context

$> kubectl config view

$> kubectl config view -o jsonpath="{.context[*].name}"

$ kubectl get namespaces
NAME          LABELS    STATUS
default                  Active
kube-system              Active

kind: Namespace  
apiVersion: v1  
metadata:  
 name: my-namespace  
 labels:  
   name: my-namespace  

$ kubectl create -f my-namespace.yaml

~$ kubectl get namespaces  
NAME                    LABELS    STATUS  
default                     Active  
mytunes-prod                Active  
mytunes-staging             Active  
my-other-app                Active  

~$ kubectl get services --namespace=mytunes-staging
NAME          LABELS                    SELECTOR        IP(S)             PORT(S)  
mytunes       name=mytunes,version=1    name=mytunes    10.43.250.14      80/TCP  
                                                        104.185.824.125     
mysql         name=mysql                name=mysql      10.43.250.63      3306/TCP  

~$ kubectl get services --namespace=mytunes-prod  
NAME          LABELS                    SELECTOR        IP(S)             PORT(S)  
mytunes       name=mytunes,version=1    name=mytunes    10.43.241.145     80/TCP  
                                                        104.199.132.213     
mysql         name=mysql                name=mysql      10.43.245.77      3306/TCP  

  spec:

    containers:

      -

        name: "nginx-ssl-proxy"

        image: "gcr.io/cloud-solutions-images/nginx-ssl-proxy:latest"

        env:

          -

            name: "SERVICE\_HOST\_ENV\_NAME"

            value: "JENKINS\_SERVICE\_HOST"

          -

            name: "SERVICE\_PORT\_ENV\_NAME"

            value: "JENKINS\_SERVICE\_PORT\_UI"

          -

            name: "ENABLE\_SSL"

            value: "true"

          -

            name: "ENABLE\_BASIC\_AUTH"

            value: "true"

        ports:

          -

            name: "nginx-ssl-proxy-http"

            containerPort: 80

          -

            name: "nginx-ssl-proxy-https"

            containerPort: 443

  kind: "Service"

  apiVersion: "v1"

  metadata:

    name: "nginx-ssl-proxy"

    labels:

      name: "nginx"

      role: "ssl-proxy"

  spec:

    ports:

      -

        name: "https"

        port: 443

        targetPort: "nginx-ssl-proxy-https"

        protocol: "TCP"

      -

        name: "http"

        port: 80

        targetPort: "nginx-ssl-proxy-http"

        protocol: "TCP"

    selector:

      name: "nginx"

      role: "ssl-proxy"

    type: "LoadBalancer"

$ cat ssl.key | base64  
   LS0tLS1CRUdJTiBDRVJUS...

  apiVersion: "v1"

  kind: "Secret"

  metadata:

    name: "ssl-proxy-secret"

    namespace: "default"

  data:

    proxycert: "LS0tLS1CRUd..."

    proxykey: "LS0tLS1CR..."

    htpasswd: "ZXZhb..."

$ kubectl create -f secrets.json

  spec:

    containers:

      -

        name: "nginx-ssl-proxy"

        image: "gcr.io/cloud-solutions-images/nginx-ssl-proxy:latest"

        env: [...]

        ports: ...[]

        volumeMounts:

          -

            name: "secrets"

            mountPath: "/etc/secrets"

            readOnly: true

    volumes:

      -

        name: "secrets"

        secret:

          secretName: "ssl-proxy-secret"

$ docker run -d busybox:latest /bin/sh -c 'i=0; while true; do echo $i \>\> /foo; i=$(expr $i + 1); sleep 3; done'  

$ docker ps  
CONTAINER ID  IMAGE           COMMAND           CREATED        STATUS  
168aefb8881b  busybox:latest  "/bin/sh -c 'i=0; 6 seconds ago  Up 4 seconds  

$ sudo criu dump -o dump.log -v4 -t 17810 \  
        -D /tmp/img/\<container\_id\> \  
        --root /var/lib/docker/aufs/mnt/\<container\_id\> \  
        --ext-mount-map /etc/resolv.conf:/etc/resolv.conf \  
        --ext-mount-map /etc/hosts:/etc/hosts \  
        --ext-mount-map /etc/hostname:/etc/hostname \  
        --ext-mount-map /.dockerinit:/.dockerinit \  
        --manage-cgroups \  
        --evasive-devices  

$ docker ps -a  
CONTAINER ID  IMAGE           COMMAND           CREATED        STATUS  
168aefb8881b  busybox:latest  "/bin/sh -c 'i=0; 6 minutes ago  Exited (-1) 4 minutes ago  

$ sudo mount -t aufs -o br=\  
/var/lib/docker/aufs/diff/\<container\_id\>:\  
/var/lib/docker/aufs/diff/\<container\_id\>-init:\  
/var/lib/docker/aufs/diff/a9eb172552348a9a49180694790b33a1097f546456d041b6e82e4d7716ddb721:\  
/var/lib/docker/aufs/diff/120e218dd395ec314e7b6249f39d2853911b3d6def6ea164ae05722649f34b16:\  
/var/lib/docker/aufs/diff/42eed7f1bf2ac3f1610c5e616d2ab1ee9c7290234240388d6297bc0f32c34229:\  
/var/lib/docker/aufs/diff/511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158:\  
none /var/lib/docker/aufs/mnt/\<container\_id\>  

$ sudo criu restore -o restore.log -v4 -d  
        -D /tmp/img/\<container\_id\> \  
        --root /var/lib/docker/aufs/mnt/\<container\_id\> \  
        --ext-mount-map /etc/resolv.conf:/var/lib/docker/containers/\<container\_id\>/resolv.conf \  
        --ext-mount-map /etc/hosts:/var/lib/docker/containers/\<container\_id\>/hosts \  
        --ext-mount-map /etc/hostname:/var/lib/docker/containers/\<container\_id\>/hostname \  
        --ext-mount-map /.dockerinit:/var/lib/docker/init/dockerinit-1.0.0 \  
        --manage-cgroups \  
        --evasive-devices  

$ ps -ef | grep /bin/sh  
root     18580     1  0 12:38 ?        00:00:00 /bin/sh -c i=0; while true; do echo $i \>\> /foo; i=$(expr $i + 1); sleep 3; done  

$ docker ps -a  
CONTAINER ID  IMAGE           COMMAND           CREATED        STATUS  
168aefb8881b  busybox:latest  "/bin/sh -c 'i=0; 7 minutes ago  Exited (-1) 5 minutes ago  

docker\_cr.sh

$ sudo docker\_cr.sh -c 4397   
dump successful  

$ sudo docker\_cr.sh -r 4397  
restore successful  

$ kubectl get pods

NAME                                           READY     REASON    RESTARTS   AGE

fluentd-cloud-logging-kubernetes-minion-0f64   1/1       Running   0          32m

fluentd-cloud-logging-kubernetes-minion-27gf   1/1       Running   0          32m

fluentd-cloud-logging-kubernetes-minion-pk22   1/1       Running   0          31m

fluentd-cloud-logging-kubernetes-minion-20ej   1/1       Running   0          31m

kube-dns-v3-pk22                               3/3       Running   0          32m


monitoring-heapster-v1-20ej                    0/1       Running   9          32m

  apiVersion : v1  
  kind : Pod  
  metadata :  
    name : counter  
  spec :  
    containers :  
   - name : count  
      image : ubuntu:14.04  
      args : [bash, -c,   
            'for ((i = 0; ; i++)); do echo "$i: $(date)"; sleep 1; done']  


$ kubectl create -f counter-pod.yaml


pods/counter

$ kubectl get pods

NAME                                           READY     REASON    RESTARTS   AGE

counter                                        1/1       Running   0          5m

fluentd-cloud-logging-kubernetes-minion-0f64   1/1       Running   0          55m

fluentd-cloud-logging-kubernetes-minion-27gf   1/1       Running   0          55m

fluentd-cloud-logging-kubernetes-minion-pk22   1/1       Running   0          55m

fluentd-cloud-logging-kubernetes-minion-20ej   1/1       Running   0          55m

kube-dns-v3-pk22                               3/3       Running   0          55m

monitoring-heapster-v1-20ej                    0/1       Running   9          56m

$ kubectl logs counter

0: Tue Jun  2 21:37:31 UTC 2015

1: Tue Jun  2 21:37:32 UTC 2015

2: Tue Jun  2 21:37:33 UTC 2015

3: Tue Jun  2 21:37:34 UTC 2015

4: Tue Jun  2 21:37:35 UTC 2015

5: Tue Jun  2 21:37:36 UTC 2015

$ kubectl exec -i counter bash

ps aux

USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND

root         1  0.0  0.0  17976  2888 ?        Ss   00:02   0:00 bash -c for ((i = 0; ; i++)); do echo "$i: $(date)"; sleep 1; done

root       468  0.0  0.0  17968  2904 ?        Ss   00:05   0:00 bash

root       479  0.0  0.0   4348   812 ?        S    00:05   0:00 sleep 1

root       480  0.0  0.0  15572  2212 ?        R    00:05   0:00 ps aux

$ kubectl stop pod counter

pods/counter


Now let’s restart the counter.


$ kubectl create -f counter-pod.yaml

pods/counter

$ kubectl logs counter

0: Tue Jun  2 21:51:40 UTC 2015

1: Tue Jun  2 21:51:41 UTC 2015

2: Tue Jun  2 21:51:42 UTC 2015

3: Tue Jun  2 21:51:43 UTC 2015

4: Tue Jun  2 21:51:44 UTC 2015

5: Tue Jun  2 21:51:45 UTC 2015

6: Tue Jun  2 21:51:46 UTC 2015

7: Tue Jun  2 21:51:47 UTC 2015

8: Tue Jun  2 21:51:48 UTC 2015

apiVersion: v1

kind: Pod

metadata:

  name: fluentd-cloud-logging

spec:

  containers:

  - name: fluentd-cloud-logging

    image: gcr.io/google\_containers/fluentd-gcp:1.6

    env:

    - name: FLUENTD\_ARGS

      value: -qq

    volumeMounts:

    - name: containers

      mountPath: /var/lib/docker/containers

  volumes:

  - name: containers

    hostPath:

      path: /var/lib/docker/containers

$ gsutil -m cp -r gs://myproject/kubernetes.counter\_default\_count/2015/06/11 .

$ cat 21\:00\:00\_21\:59\:59\_S0.json | jq '.structPayload.log'

"0: Thu Jun 11 21:39:38 UTC 2015\n"

"1: Thu Jun 11 21:39:39 UTC 2015\n"

"2: Thu Jun 11 21:39:40 UTC 2015\n"

"3: Thu Jun 11 21:39:41 UTC 2015\n"

"4: Thu Jun 11 21:39:42 UTC 2015\n"

"5: Thu Jun 11 21:39:43 UTC 2015\n"

"6: Thu Jun 11 21:39:44 UTC 2015\n"

"7: Thu Jun 11 21:39:45 UTC 2015\n"

* Can create new service account with ServiceAccountToken. Controller will create token for it.

*

* Client library currently uses internal API objects.

* Nobody reported that frequent changes to types.go have been painful, but we are worried about it.

* Structured types are useful in the client. Versioned structs would be ok.

* If start with json/yaml (kubectl), shouldn’t convert to structured types. Use swagger.

* Administrators can restrict who can run privileged containers or require specific unix uids

* Kubelet will be able to get pull credentials from apiserver

* Policy proposal coming in the next week or so


#	Version	Note
1	`channel.k8s.io`	Initial (unversioned) SPDY sub protocol (#13394, #13395)
2	`v2.channel.k8s.io`	Resolves the issues present in the first version (#15961)
3	`v3.channel.k8s.io`	Adds support for resizing container terminals (#25273)
4	`v4.channel.k8s.io`	Adds support for exit codes using JSON errors (#26541)
5	`v5.channel.k8s.io`	Adds support for a CLOSE signal (#119157)

First Byte	Type	Description
`0`	standard input	Data streamed from stdin
`1`	standard output	Data streamed to stdout
`2`	standard error	Data streamed to stderr
`3`	stream error	A streaming error occurred
`4`	stream resize	A terminal resize event
`255`	stream close	Stream should be closed (for WebSockets)

Feature gate	Stage in v1.30	Behavior change
SELinuxMountReadWriteOncePod	Beta	No
SELinuxMount	Alpha	Yes

Category Name	Category Description
`Core.Network`	Tests minimal networking functionality (ability to access pod-by-pod IP.)
`Core.Storage`	Tests minimal storage functionality, (ability to mount a hostPath storage volume.)
`Core.Scheduling`	Tests minimal scheduling functionality, (ability to schedule a pod with CPU limits.)
`Core.Concurrent`	Tests minimal concurrent functionality, (the ability of a node to handle traffic to multiple pods concurrently.)
`Extend.HostProcess`	Tests features related to Windows HostProcess pod functionality.
`Extend.ActiveDirectory`	Tests features related to Active Directory functionality.
`Extend.NetworkPolicy`	Tests features related to Network Policy functionality.
`Extend.Network`	Tests advanced networking functionality, (ability to support IPv6)
`Extend.Worker`	Tests features related to Windows worker node functionality, (ability for nodes to access TCP and UDP services in the same cluster)

	Telepresence	Gefyra	mirrord
Cluster connection scope	Entire machine or container	Container	Process
Developer OS support	Linux, macOS, Windows	Linux, macOS, Windows	Linux, macOS, Windows (WSL)
Incoming traffic features	Interception	Interception	Interception or mirroring
File access	Supported	Unsupported	Supported
Environment variables	Supported	Unsupported	Supported
Requires local root	Yes	No	No
How to use	CLI Docker Desktop extension	CLI Docker Desktop extension	CLI Visual Studio Code extension IntelliJ plugin

Range properties	Values
service-node-port-range	30000-32767
Band Offset	`min(max(16, 2768/32), 128)` = `min(max(16, 86), 128)` = `min(86, 128)` = 86
Static band start	30000
Static band end	30085
Dynamic band start	30086
Dynamic band end	32767

Range properties	Values
service-node-port-range	30000-30015
Band Offset	0
Static band start	-
Static band end	-
Dynamic band start	30000
Dynamic band end	30015

Range properties	Values
service-node-port-range	30000-30127
Band Offset	`min(max(16, 128/32), 128)` = `min(max(16, 4), 128)` = `min(16, 128)` = 16
Static band start	30000
Static band end	30015
Dynamic band start	30016
Dynamic band end	30127

Range properties	Values
service-node-port-range	30000-34095
Band Offset	`min(max(16, 4096/32), 128)` = `min(max(16, 128), 128)` = `min(128, 128)` = 128
Static band start	30000
Static band end	30127
Dynamic band start	30128
Dynamic band end	34095

Range properties	Values
service-node-port-range	30000-38191
Band Offset	`min(max(16, 8192/32), 128)` = `min(max(16, 256), 128)` = `min(256, 128)` = 128
Static band start	30000
Static band end	30127
Dynamic band start	30128
Dynamic band end	38191

File	Description
memory.max	`memory.max` specifies the maximum memory limit, a container is allowed to use. If a process within the container tries to consume more memory than the configured limit, the kernel terminates the process with an Out of Memory (OOM) error. It is mapped to the container's memory limit specified in Pod manifest.
memory.min	`memory.min` specifies a minimum amount of memory the cgroups must always retain, i.e., memory that should never be reclaimed by the system. If there's no unprotected reclaimable memory available, OOM kill is invoked. It is mapped to the container's memory request specified in the Pod manifest.
memory.high	`memory.high` specifies the memory usage throttle limit. This is the main mechanism to control a cgroup's memory use. If cgroups memory use goes over the high boundary specified here, the cgroups processes are throttled and put under heavy reclaim pressure. Kubernetes uses a formula to calculate `memory.high`, depending on container's memory request, memory limit or node allocatable memory (if container's memory limit is empty) and a throttling factor. Please refer to the KEP for more details on the formula.

Title	Issue	Status
CVE Feed: JSON feed should pass jsonfeed spec validator	kubernetes/webite#36808	closed, addressed by kubernetes/sig-security#76
CVE Feed: Add lastUpdatedAt as a metadata field	kubernetes/sig-security#72	closed, addressed by kubernetes/sig-security#76
Support RSS feeds by generating data in Atom format	kubernetes/sig-security#77	closed, addressed by kubernetes/website#39513
CVE Feed: Sort Markdown Table from most recent to least recently announced CVE	kubernetes/sig-security#73	closed, addressed by kubernetes/sig-security#76
CVE Feed: Include a timestamp field for each CVE indicating when it was last updated	kubernetes/sig-security#63	closed, addressed by kubernetes/sig-security#76
CVE Feed: Add Prow job link as a metadata field	kubernetes/sig-security#71	closed, addressed by kubernetes/sig-security#83

Service State	Use case	What do you need in order to cope with this use case?
Normal	No known vulnerabilities: The service owner is normally not aware of any known vulnerabilities in the service image or configuration. Yet, it is reasonable to assume that the service has weaknesses.	Provide generic protection against any unknown, zero-day, service vulnerabilities - Detect/block irregular patterns sent as part of incoming client requests that may be used as exploits.
Vulnerable	An applicable CVE is published: The service owner is required to release a new non-vulnerable revision of the service. Research shows that in practice this process of removing a known vulnerability may take many weeks to accomplish (2 months on average).	Add protection based on the CVE analysis - Detect/block incoming requests that include specific patterns that may be used to exploit the discovered vulnerability. Continue to offer services, although the service has a known vulnerability.
Exploitable	A known exploit is published: The service owner needs a way to filter incoming requests that contain the known exploit.	Add protection based on a known exploit signature - Detect/block incoming client requests that carry signatures identifying the exploit. Continue to offer services, although the presence of an exploit.
Misused	An offender misuses pods backing the service: The offender can follow an attack pattern enabling him/her to misuse pods. The service owner needs to restart any compromised pods while using non compromised pods to continue offering the service. Note that once a pod is restarted, the offender needs to repeat the attack pattern before he/she may again misuse it.	Identify and restart instances of the component that is being misused - At any given time, some backing pods may be compromised and misused, while others behave as designed. Detect/remove the misused pods while allowing other pods to continue servicing client requests.

		PVC `storageClassName` = `""`	PVC `storageClassName` = `null`
Without default class	PV `storageClassName` = `""`	binds	binds
Without default class	PV without `storageClassName`	binds	binds
With default class	PV `storageClassName` = `""`	binds	class updates
With default class	PV without `storageClassName`	binds	class updates

#	Title	Issue	Status
1	hostPath PersistentVolumes enable PodSecurityPolicy bypass	#81110	closed, addressed by kubernetes/website#15756 and kubernetes/kubernetes#109798
2	Kubernetes does not facilitate certificate revocation	#81111	duplicate of #18982 and needs a KEP
3	HTTPS connections are not authenticated	#81112	Largely left as an end user exercise in setting up the right configuration
4	TOCTOU when moving PID to manager's cgroup via kubelet	#81113	Requires Node access for successful exploitation. Fix needed
5	Improperly patched directory traversal in `kubectl cp`	#76788	closed, assigned CVE-2019-11249, fixed in #80436
6	Bearer tokens are revealed in logs	#81114	closed, assigned CVE-2019-11250, fixed in #81330
7	Seccomp is disabled by default	#81115	closed, addressed by #101943
8	Pervasive world-accessible file permissions	#81116	#112384 ( in progress)
9	Environment variables expose sensitive data	#81117	closed, addressed by #84992 and #84677
10	Use of InsecureIgnoreHostKey in SSH connections	#81118	This feature was removed in v1.22: #102297
11	Use of InsecureSkipVerify and other TLS weaknesses	#81119	Needs a KEP
12	`kubeadm` performs potentially-dangerous reset operations	#81120	closed, fixed by #81495, #81494, and kubernetes/website#15881
13	Overflows when using strconv.Atoi and downcasting the result	#81121	closed, fixed by #89120
14	kubelet can cause an Out of Memory error with a malicious manifest	#81122	closed, fixed by #76518
15	`kubectl` can cause an Out Of Memory error with a malicious Pod specification	#81123	Fix needed
16	Improper fetching of PIDs allows incorrect cgroup movement	#81124	Fix needed
17	Directory traversal of host logs running kube-apiserver and kubelet	#81125	closed, fixed by #87273
18	Non-constant time password comparison	#81126	closed, fixed by #81152
19	Encryption recommendations not in accordance with best practices	#81127	Work in Progress
20	Adding credentials to containers by default is unsafe	#81128	Closed, fixed by #89193
21	kubelet liveness probes can be used to enumerate host network	#81129	Needs a KEP
22	iSCSI volume storage cleartext secrets in logs	#81130	closed, fixed by #81215
23	Hard coded credential paths	#81131	closed, awaiting more evidence
24	Log rotation is not atomic	#81132	Fix needed
25	Arbitrary file paths without bounding	#81133	Fix needed.
26	Unsafe JSON construction	#81134	Partially fixed
27	kubelet crash due to improperly handled errors	#81135	Closed. Fixed by #81135
28	Legacy tokens do not expire	#81136	closed, fixed as part of #70679
29	CoreDNS leaks internal cluster information across namespaces	#81137	Closed, resolved with CoreDNS v1.6.2. #81137 (comment)
30	Services use questionable default functions	#81138	Fix needed
31	Incorrect docker daemon process name in container manager	#81139	closed, fixed by #81083
32	Use standard formats everywhere	#81140	Needs a KEP
33	Superficial health check provides false sense of safety	#81141	closed, fixed by #81319
34	Hardcoded use of insecure gRPC transport	#81142	Needs a KEP
35	Incorrect handling of `Retry-After`	#81143	closed, fixed by #91048
36	Incorrect isKernelPid check	#81144	closed, fixed by #81086
37	Kubelet supports insecure TLS ciphersuites	#81145	closed but fix needed for #91444 (see this comment)

KMS Provider	Time taken by 95 percentile
KMS v1	160ms
KMS v2	80μs

Driver	Alpha	Beta (in-tree deprecated)	Beta (on-by-default)	GA	Target "in-tree plugin" removal
AWS EBS	1.14	1.17	1.23	1.25	1.27 (Target)
Azure Disk	1.15	1.19	1.23	1.24	1.26 (Target)
Azure File	1.15	1.21	1.24	1.26 (Target)	1.28 (Target)
Ceph FS	1.26 (Target)
Ceph RBD	1.23	1.26 (Target)	1.27 (Target)	1.28 (Target)	1.30 (Target)
GCE PD	1.14	1.17	1.23	1.25	1.27 (Target)
OpenStack Cinder	1.14	1.18	1.21	1.24	1.26 (Target)
Portworx	1.23	1.25	1.26 (Target)	1.27 (Target)	1.29 (Target)
vSphere	1.18	1.19	1.25	1.26 (Target)	1.28 (Target)

Driver	Deprecated	Code Removal
Flocker	1.22	1.25
GlusterFS	1.25	1.26 (Target)
Quobyte	1.22	1.25
ScaleIO	1.16	1.22
StorageOS	1.22	1.25

Validation Rule	Purpose
`!(self.getDayOfWeek() in [0, 6])`	Validate that a date is not a Sunday or Saturday.
`isUrl(self) && url(self).getHostname() in [a.example.com', 'b.example.com']`	Validate that a URL has an allowed hostname.
`self.map(x, x.weight).sum() == 1`	Validate that the weights of a list of objects sum to 1.
`int(self.find('^[0-9]*')) < 100`	Validate that a string starts with a number less than 100.
`self.isSorted()`	Validates that a list is sorted.

Title	Issue	Time Commitment	Complexity	Benefit to Ecosystem
Kubernetes does not facilitate certificate revocation	#81111	High	High	Medium
Use of InsecureSkipVerify and other TLS weaknesses	#81119	High	High	Medium
`kubectl` can cause a local Out Of Memory error with a malicious Pod specification	#81123	Medium	Medium	Medium
Improper fetching of PIDs allows incorrect cgroup movement	#81124	Medium	Medium	Medium
kubelet liveness probes can be used to enumerate host network	#81129	High	High	Medium
API Server supports insecure TLS ciphersuites	#81145	Medium	Medium	Low
TOCTOU when moving PID to manager's cgroup via kubelet	#81113	Medium	Medium	Low
Log rotation is not atomic	#81132	Medium	Medium	Low
Arbitrary file paths without bounding	#81133	Medium	Medium	Low
Services use questionable default functions	#81138	Medium	Medium	Low
Use standard formats everywhere	#81140	High	High	Very Low
Hardcoded use of insecure gRPC transport	#81142	High	High	Very Low

Validation Rule	Purpose
`self.minReplicas <= self.replicas`	Validate an integer field is less than or equal to another integer field
`'Available' in self.stateCounts`	Validate an entry with the 'Available' key exists in a map
`self.set1.all(e, !(e in self.set2))`	Validate that the elements of two sets are disjoint
`self == oldSelf`	Validate that a required field is immutable once it is set
`self.created + self.ttl < self.expired`	Validate that 'expired' date is after a 'create' date plus a 'ttl' duration

Validation	Best Practice	Example(s)
Validate an integer is between 0 and 100.	Use OpenAPIv3 value validations.	type: integer minimum: 0 maximum: 100
Constraint the max size limits on maps (objects with additionalProperties), arrays and string.	Use OpenAPIv3 value validations. Recommended for all maps, arrays and strings. This best practice is essential for rule cost estimation (explained below).	type: maxItems: 100
Require a date-time be more recent than a particular timestamp.	Use OpenAPIv3 string formats to declare that the field is a date-time. Use validation rules to compare it to a particular timestamp.	type: string format: date-time x-kubernetes-validations: - rule: "self >= timestamp('2000-01-01T00:00:00.000Z')"
Require two sets to be disjoint.	Use x-kubernetes-list-type to validate that the arrays are sets. Use validation rules to validate the sets are disjoint.	type: object properties: set1: type: array x-kubernetes-list-type: set set2: ... x-kubernetes-validations: - rule: "!self.set1.all(e, !(e in self.set2))"

Transition Rule	Purpose
`self == oldSelf`	For a required field, make that field immutable once it is set. For an optional field, only allow transitioning from unset to set, or from set to unset.
(on parent of field) `has(self.field) == has(oldSelf.field)` on field: `self == oldSelf`	Make a field immutable: validate that a field, even if optional, never changes after the resource is created (for a required field, the previous rule is simpler).
`self.all(x, x in oldSelf)`	Only allow adding items to a field that represents a set (prevent removals).
`self >= oldSelf`	Validate that a number is monotonically increasing.

Without extra `chroot()`	With extra `chroot()`
`bin`	`bin`
`dev`	`dev`
`etc`	`etc`
`home`
`lib`	`lib`
`media`
`mnt`
`opt`	`opt`
`proc`	`proc`
`root`
`run`	`run`
`sbin`
`srv`
`sys`
`tmp`	`tmp`
`usr`	`usr`
`var`	`var`
`dbg`
`nginx-ingress-controller`
`wait-shutdown`

Components	Metrics	Notes
Kube-Controller-Manager	storage_operation_duration_seconds	A new label `migrated` is added to the metric to indicate whether this storage operation is a CSI migration operation(string value `true` for enabled and `false` for not enabled).
Kubelet	csi_operations_seconds	The new metric exposes labels including `driver_name`, `method_name`, `grpc_status_code` and `migrated`. The meaning of these labels is identical to `csi_sidecar_operations_seconds`.
CSI Sidecars(provisioner, attacher, resizer)	csi_sidecar_operations_seconds	A new label `migrated` is added to the metric to indicate whether this storage operation is a CSI migration operation(string value `true` for enabled and `false` for not enabled).

Kubernetes version	Ingress-NGINX version	Notes
v1.22	v1.0.0-alpha.2	New features, plus bug fixes.
v1.21	v0.47.x	Bugfixes only, and just for security issues or crashes. No end-of-support date announced.
v1.20	v0.47.x	Bugfixes only, and just for security issues or crashes. No end-of-support date announced.
v1.19	v0.47.x	Bugfixes only, and just for security issues or crashes. Fixes only provided until 6 months after Kubernetes v1.22.0 is released.

Week Number in Year	Release Number	Release Week	Note
35	1.23	1 (August 23)
50	1.23	16 (December 07)	KubeCon + CloudNativeCon NA Break (Oct 11-15)

Week Number in Year	Release Number	Release Week	Note
1	1.24	1 (January 03)
15	1.24	15 (April 12)
17	1.25	1 (April 26)	KubeCon + CloudNativeCon EU likely to occur
32	1.25	15 (August 09)
34	1.26	1 (August 22	KubeCon + CloudNativeCon NA likely to occur
49	1.26	14 (December 06)

Annotation	Description
`a8r.io/description`	Unstructured text description of the service for humans.
`a8r.io/owner`	SSO username (GitHub), email address (linked to GitHub account), or unstructured owner description.
`a8r.io/chat`	Slack channel, or link to external chat system.
`a8r.io/bugs`	Link to external bug tracker.
`a8r.io/logs`	Link to external log viewer.
`a8r.io/documentation`	Link to external project documentation.
`a8r.io/repository`	Link to external VCS repository.
`a8r.io/support`	Link to external support center.
`a8r.io/runbook`	Link to external project runbook.
`a8r.io/incidents`	Link to external incident dashboard.
`a8r.io/uptime`	Link to external uptime dashboard.
`a8r.io/performance`	Link to external performance dashboard.
`a8r.io/dependencies`	Unstructured text describing the service dependencies for humans.

Kubernetes Blog

Kubernetes v1.31: kubeadm v1beta4

A list of changes since v1beta3

How to migrate v1beta3 configuration to v1beta4?

Example

How do I get involved?

Kubernetes 1.31: Custom Profiling in Kubectl Debug Graduates to Beta

Custom Profiling

Constraints

Limitations

Acknowledgments

Kubernetes 1.31: Fine-grained SupplementalGroups control

Motivation: Implicit group memberships defined in /etc/group in the container image

What's wrong with it?

Fine-grained SupplementalGroups control in a Pod: SupplementaryGroupsPolicy

Note:

Attached process identity in Pod status

Note:

Feature availability

What's next?

How can I learn more?

How to get involved?

Kubernetes v1.31: New Kubernetes CPUManager Static Policy: Distribute CPUs Across Cores

Understanding the feature

Enabling the feature

Current limitations and future directions

Conclusion

Further reading

Getting involved

Kubernetes 1.31: Autoconfiguration For Node Cgroup Driver (beta)

Automated cgroup driver detection

Future work

Kubernetes 1.31: Streaming Transitions from SPDY to WebSockets

Streaming APIs in Kubernetes

Why change the streaming protocol?

How streaming APIs work

How to use the new WebSocket streaming protocol

Learn more about streaming APIs

Kubernetes 1.31: Pod Failure Policy for Jobs Goes GA

About Pod failure policy

How it works

Kubernetes-initiated Pod disruptions

Example

Learn more

Related work

Get involved

Acknowledgments

Kubernetes 1.31: MatchLabelKeys in PodAffinity graduates to beta

matchLabelKeys - Enhanced scheduling for versatile rolling updates

mismatchLabelKeys - Service isolation

Getting involved

How can I learn more?

Kubernetes 1.31: Prevent PersistentVolume Leaks When Deleting out of Order

How did reclaim work in previous Kubernetes releases?

Retrieve a PVC that is bound to a PV

Delete PV

Retrieving the PV

Delete PVC

PV reclaim policy with Kubernetes v1.31

How to enable new behavior?

How does it work?

What about CSI migrated volumes?

Some caveats

References

How do I get involved?

Kubernetes 1.31: Read Only Volumes Based On OCI Artifacts (alpha)

Use cases

Detailed example

Further reading

Kubernetes 1.31: VolumeAttributesClass for Volume Modification Beta

Dynamically modifying volume attributes.

Limitations with the beta

Kubernetes v1.31: Accelerating Cluster Performance with Consistent Reads from Cache

Why consistent reads matter

The breakthrough: Caching with confidence

Performance gains you'll notice

What's next?

Getting started

Kubernetes 1.31: Moving cgroup v1 Support into Maintenance Mode

Understanding cgroups

Motivation: Implicit group memberships defined in `/etc/group` in the container image

Fine-grained SupplementalGroups control in a Pod: `SupplementaryGroupsPolicy`

`matchLabelKeys` - Enhanced scheduling for versatile rolling updates

`mismatchLabelKeys` - Service isolation

Deprecation of `status.nodeInfo.kubeProxyVersion` field for Nodes (KEP 4004)

Removal of kubelet `--keep-terminated-pod-volumes` command line flag

Scheduler now uses QueueingHint when `SchedulerQueueingHints` is enabled

Deprecation of `status.nodeInfo.kubeProxyVersion` field for Nodes (KEP 4004)

Removal of kubelet `--keep-terminated-pod-volumes` command line flag

Kubernetes Metrics	NVIDIA dcgm-exporter metric
`container_accelerator_duty_cycle`	`DCGM_FI_DEV_GPU_UTIL`
`container_accelerator_memory_used_bytes`	`DCGM_FI_DEV_FB_USED`
`container_accelerator_memory_total_bytes`	`DCGM_FI_DEV_FB_FREE + DCGM_FI_DEV_FB_USED`

Criteria	KinD	Minikube
Installation on WSL2	Very Easy	Medium
Multi-node	Yes	No
Plugins	Manual install	Yes
Persistence	Yes, however not designed for	Yes
Alternatives	K3d	Microk8s

Host	Host header	Match?
`*.foo.com`	`bar.foo.com`	Matches based on shared suffix
`*.foo.com`	`baz.bar.foo.com`	No match, wildcard only covers a single DNS label
`*.foo.com`	`foo.com`	No match, wildcard only covers a single DNS label

cross-product entry `{cpu, gpu-vendor.com/gpu, nic-vendor.com/nic}`	"merged" hint
`{{01: True}, {01: True}, {01: True}}`	`{01: True}`
`{{01: True}, {01: True}, {10: True}}`	`{00: False}`
`{{01: True}, {10: True}, {01: True}}`	`{00: False}`
`{{01: True}, {10: True}, {10: True}}`	`{00: False}`

`{{10: True}, {01: True}, {01: True}}`	`{00: False}`
`{{10: True}, {01: True}, {10: True}}`	`{00: False}`
`{{10: True}, {10: True}, {01: True}}`	`{00: False}`
`{{10: True}, {10: True}, {10: True}}`	`{01: True}`

`{{11: False}, {01: True}, {01: True}}`	`{01: False}`
`{{11: False}, {01: True}, {10: True}}`	`{00: False}`
`{{11: False}, {10: True}, {01: True}}`	`{00: False}`
`{{11: False}, {10: True}, {10: True}}`	`{10: False}`

Protocol	Port Number	Description
TCP	6443	Kubernetes API Server
TCP	2379-2380	etcd server client API
TCP	10250	Kubelet API
TCP	10251	kube-scheduler
TCP	10252	kube-controller-manager
TCP	10255	Read-only Kubelet API

Protocol	Port Number	Description
TCP	179	Calico BGP network
TCP	9099	Calico felix (health check)
UDP	8285	Flannel
UDP	8472	Flannel
TCP	6781-6784	Weave Net
UDP	6783-6784	Weave Net

Name	Version	MIPS Repository
golang on MIPS	1.12.5	-
docker-ce on MIPS	18.09.8	-
metrics-server for CKE on MIPS	0.3.2	`registry.inspurcloud.cn/library/cke/kubernetes/metrics-server-mips64el:v0.3.2`
etcd for CKE on MIPS	3.2.26	`registry.inspurcloud.cn/library/cke/etcd/etcd-mips64el:v3.2.26`
pause for CKE on MIPS	3.1	`registry.inspurcloud.cn/library/cke/kubernetes/pause-mips64el:3.1`
hyperkube for CKE on MIPS	1.14.3	`registry.inspurcloud.cn/library/cke/kubernetes/hyperkube-mips64el:v1.14.3`
coredns for CKE on MIPS	1.6.5	`registry.inspurcloud.cn/library/cke/kubernetes/coredns-mips64el:v1.6.5`
calico for CKE on MIPS	3.8.0	`registry.inspurcloud.cn/library/cke/calico/cni-mips64el:v3.8.0` `registry.inspurcloud.cn/library/cke/calico/ctl-mips64el:v3.8.0` `registry.inspurcloud.cn/library/cke/calico/node-mips64el:v3.8.0` `registry.inspurcloud.cn/library/cke/calico/kube-controllers-mips64el:v3.8.0`

	Endpoints	Endpoint Slices
# of resources	1	20k / 100 = 200
# of network endpoints stored	1 20k = 20k*	200 100 = 20k*
size of each resource	20k const = ~2.0 MB*	100 const = ~10 kB*
watch event data transferred	~2.0MB 5k = 10GB*	~10kB 5k = 50MB*

Localization	Slack channel
Chinese (中文)	#kubernetes-docs-zh
English	#sig-docs
French (Français)	#kubernetes-docs-fr
German (Deutsch)	#kubernetes-docs-de
Hindi	#kubernetes-docs-hi
Indonesian	#kubernetes-docs-id
Italian	#kubernetes-docs-it
Japanese (日本語)	#kubernetes-docs-ja
Korean (한국어)	#kubernetes-docs-ko
Portuguese (Português)	#kubernetes-docs-pt
Spanish (Español)	#kubernetes-docs-es

SHORT NAME	CNAME
eu.nginx.acme.com	nginx.mynamespace.myfederation.svc.europe-west1.example.com
us.nginx.acme.com	nginx.mynamespace.myfederation.svc.us-central1.example.com
nginx.acme.com	nginx.mynamespace.myfederation.svc.example.com