kubectl apply

Synopsis

Apply a configuration to a resource by file name or stdin. The resource name must be specified. This resource will be created if it doesn’t exist yet. To use ‘apply’, always create the resource initially with either ‘apply’ or ‘create —save-config’.

JSON and YAML formats are accepted.

Alpha Disclaimer: the —prune functionality is not yet complete. Do not use unless you are aware of what the current state is. See https://issues.k8s.io/34274.

  1. kubectl apply (-f FILENAME | -k DIRECTORY)

Examples

  1.   # Apply the configuration in pod.json to a pod
  2.   kubectl apply -f ./pod.json
  4.   # Apply resources from a directory containing kustomization.yaml - e.g. dir/kustomization.yaml
  5.   kubectl apply -k dir/
  7.   # Apply the JSON passed into stdin to a pod
  8.   cat pod.json | kubectl apply -f -
  10.   # Apply the configuration from all files that end with '.json'
  11.   kubectl apply -f '*.json'
  13.   # Note: --prune is still in Alpha
  14.   # Apply the configuration in manifest.yaml that matches label app=nginx and delete all other resources that are not in the file and match label app=nginx
  15.   kubectl apply --prune -f manifest.yaml -l app=nginx
  17.   # Apply the configuration in manifest.yaml and delete all the other config maps that are not in the file
  18.   kubectl apply --prune -f manifest.yaml --all --prune-allowlist=core/v1/ConfigMap

Options

—all

Select all resources in the namespace of the specified resource types.

—allow-missing-template-keys     Default: true

If true, ignore any errors in templates when a field or map key is missing in the template. Only applies to golang and jsonpath output formats.

—cascade string[=”background”]     Default: “background”

Must be “background”, “orphan”, or “foreground”. Selects the deletion cascading strategy for the dependents (e.g. Pods created by a ReplicationController). Defaults to background.

—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.

—field-manager string     Default: “kubectl-client-side-apply”

Name of the manager used to track field ownership.

-f, —filename strings

The files that contain the configurations to apply.

—force

If true, immediately remove resources from API and bypass graceful deletion. Note that immediate deletion of some resources may result in inconsistency or data loss and requires confirmation.

—force-conflicts

If true, server-side apply will force the changes against conflicts.

—grace-period int     Default: -1

Period of time in seconds given to the resource to terminate gracefully. Ignored if negative. Set to 1 for immediate shutdown. Can only be set to 0 when —force is true (force deletion).

-h, —help

help for apply

-k, —kustomize string

Process a kustomization directory. This flag can’t be used together with -f or -R.

—openapi-patch     Default: true

If true, use openapi to calculate diff when the openapi presents and the resource can be found in the openapi spec. Otherwise, fall back to use baked-in types.

-o, —output string

Output format. One of: (json, yaml, name, go-template, go-template-file, template, templatefile, jsonpath, jsonpath-as-json, jsonpath-file).

—overwrite     Default: true

Automatically resolve conflicts between the modified and live configuration by using values from the modified configuration

—prune

Automatically delete resource objects, that do not appear in the configs and are created by either apply or create —save-config. Should be used with either -l or —all.

—prune-allowlist strings

Overwrite the default allowlist with <group/version/kind> for —prune

-R, —recursive

Process the directory used in -f, —filename recursively. Useful when you want to manage related manifests organized within the same directory.

-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.

—server-side

If true, apply runs in the server instead of the client.

—show-managed-fields

If true, keep the managedFields when printing objects in JSON or YAML format.

—template string

Template string or path to template file to use when -o=go-template, -o=go-template-file. The template format is golang templates [http://golang.org/pkg/text/template/#pkg-overview].

—timeout duration

The length of time to wait before giving up on a delete, zero means determine a timeout from the size of the object

—validate string[=”strict”]     Default: “strict”

Must be one of: strict (or true), warn, ignore (or false).
“true” or “strict” will use a schema to validate the input and fail the request if invalid. It will perform server side validation if ServerSideFieldValidation is enabled on the api-server, but will fall back to less reliable client-side validation if not.
“warn” will warn about unknown or duplicate fields without blocking the request if server-side field validation is enabled on the API server, and behave as “ignore” otherwise.
“false” or “ignore” will not perform any schema validation, silently dropping any unknown or duplicate fields.

—wait

If true, wait for resources to be gone before returning. This waits for finalizers.

—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

—cloud-provider-gce-l7lb-src-cidrs cidrs     Default: 130.211.0.0/22,35.191.0.0/16

CIDRs opened in GCE firewall for L7 LB traffic proxy & health checks

—cloud-provider-gce-lb-src-cidrs cidrs     Default: 130.211.0.0/22,209.85.152.0/22,209.85.204.0/22,35.191.0.0/16

CIDRs opened in GCE firewall for L4 LB traffic proxy & health checks

—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