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kubectl drain

    Synopsis

    Drain node in preparation for maintenance.

    The given node will be marked unschedulable to prevent new pods from arriving. 'drain' evicts the pods if the API server supports https://kubernetes.io/docs/concepts/workloads/pods/disruptions/ eviction https://kubernetes.io/docs/concepts/workloads/pods/disruptions/ . Otherwise, it will use normal DELETE to delete the pods. The 'drain' evicts or deletes all pods except mirror pods (which cannot be deleted through the API server). If there are daemon set-managed pods, drain will not proceed without --ignore-daemonsets, and regardless it will not delete any daemon set-managed pods, because those pods would be immediately replaced by the daemon set controller, which ignores unschedulable markings. If there are any pods that are neither mirror pods nor managed by a replication controller, replica set, daemon set, stateful set, or job, then drain will not delete any pods unless you use --force. --force will also allow deletion to proceed if the managing resource of one or more pods is missing.

    'drain' waits for graceful termination. You should not operate on the machine until the command completes.

    When you are ready to put the node back into service, use kubectl uncordon, which will make the node schedulable again.

    https://kubernetes.io/images/docs/kubectl_drain.svg Workflowhttps://kubernetes.io/images/docs/kubectl_drain.svg

    kubectl drain NODE

    Examples

      # Drain node "foo", even if there are pods not managed by a replication controller, replica set, job, daemon set, or stateful set on it
  kubectl drain foo --force
  
  # As above, but abort if there are pods not managed by a replication controller, replica set, job, daemon set, or stateful set, and use a grace period of 15 minutes
  kubectl drain foo --grace-period=900

    Options

    --chunk-size int     Default: 500

    Return large lists in chunks rather than all at once. Pass 0 to disable. This flag is beta and may change in the future.

    --delete-emptydir-data

    Continue even if there are pods using emptyDir (local data that will be deleted when the node is drained).

    --disable-eviction

    Force drain to use delete, even if eviction is supported. This will bypass checking PodDisruptionBudgets, use with caution.

    --dry-run string[="unchanged"]     Default: "none"

    Must be "none", "server", or "client". If client strategy, only print the object that would be sent, without sending it. If server strategy, submit server-side request without persisting the resource.

    --force

    Continue even if there are pods that do not declare a controller.

    --grace-period int     Default: -1

    Period of time in seconds given to each pod to terminate gracefully. If negative, the default value specified in the pod will be used.

    -h, --help

    help for drain

    --ignore-daemonsets

    Ignore DaemonSet-managed pods.

    --pod-selector string

    Label selector to filter pods on the node

    -l, --selector string

    Selector (label query) to filter on, supports '=', '==', and '!='.(e.g. -l key1=value1,key2=value2). Matching objects must satisfy all of the specified label constraints.

    --skip-wait-for-delete-timeout int

    If pod DeletionTimestamp older than N seconds, skip waiting for the pod. Seconds must be greater than 0 to skip.

    --timeout duration

    The length of time to wait before giving up, zero means infinite

    Options inherited from parent commands

    --as string

    Username to impersonate for the operation. User could be a regular user or a service account in a namespace.

    --as-group strings

    Group to impersonate for the operation, this flag can be repeated to specify multiple groups.

    --as-uid string

    UID to impersonate for the operation.

    --cache-dir string     Default: "$HOME/.kube/cache"

    Default cache directory

    --certificate-authority string

    Path to a cert file for the certificate authority

    --client-certificate string

    Path to a client certificate file for TLS

    --client-key string

    Path to a client key file for TLS

    --cluster string

    The name of the kubeconfig cluster to use

    --context string

    The name of the kubeconfig context to use

    --default-not-ready-toleration-seconds int     Default: 300

    Indicates the tolerationSeconds of the toleration for notReady:NoExecute that is added by default to every pod that does not already have such a toleration.

    --default-unreachable-toleration-seconds int     Default: 300

    Indicates the tolerationSeconds of the toleration for unreachable:NoExecute that is added by default to every pod that does not already have such a toleration.

    --disable-compression

    If true, opt-out of response compression for all requests to the server

    --insecure-skip-tls-verify

    If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure

    --kubeconfig string

    Path to the kubeconfig file to use for CLI requests.

    --match-server-version

    Require server version to match client version

    -n, --namespace string

    If present, the namespace scope for this CLI request

    --password string

    Password for basic authentication to the API server

    --profile string     Default: "none"

    Name of profile to capture. One of (none|cpu|heap|goroutine|threadcreate|block|mutex)

    --profile-output string     Default: "profile.pprof"

    Name of the file to write the profile to

    --request-timeout string     Default: "0"

    The length of time to wait before giving up on a single server request. Non-zero values should contain a corresponding time unit (e.g. 1s, 2m, 3h). A value of zero means don't timeout requests.

    -s, --server string

    The address and port of the Kubernetes API server

    --storage-driver-buffer-duration duration     Default: 1m0s

    Writes in the storage driver will be buffered for this duration, and committed to the non memory backends as a single transaction

    --storage-driver-db string     Default: "cadvisor"

    database name

    --storage-driver-host string     Default: "localhost:8086"

    database host:port

    --storage-driver-password string     Default: "root"

    database password

    --storage-driver-secure

    use secure connection with database

    --storage-driver-table string     Default: "stats"

    table name

    --storage-driver-user string     Default: "root"

    database username

    --tls-server-name string

    Server name to use for server certificate validation. If it is not provided, the hostname used to contact the server is used

    --token string

    Bearer token for authentication to the API server

    --user string

    The name of the kubeconfig user to use

    --username string

    Username for basic authentication to the API server

    --version version[=true]

    --version, --version=raw prints version information and quits; --version=vX.Y.Z... sets the reported version

    --warnings-as-errors

    Treat warnings received from the server as errors and exit with a non-zero exit code

    See Also

    • kubectl - kubectl controls the Kubernetes cluster manager