kubectl set env

Synopsis

Update environment variables on a pod template.

List environment variable definitions in one or more pods, pod templates. Add, update, or remove container environment variable definitions in one or more pod templates (within replication controllers or deployment configurations). View or modify the environment variable definitions on all containers in the specified pods or pod templates, or just those that match a wildcard.

If "--env -" is passed, environment variables can be read from STDIN using the standard env syntax.

Possible resources include (case insensitive):

    pod (po), replicationcontroller (rc), deployment (deploy), daemonset (ds), statefulset (sts), cronjob (cj), replicaset (rs)

kubectl set env RESOURCE/NAME KEY_1=VAL_1 ... KEY_N=VAL_N

Examples

  # Update deployment 'registry' with a new environment variable
  kubectl set env deployment/registry STORAGE_DIR=/local
  
  # List the environment variables defined on a deployments 'sample-build'
  kubectl set env deployment/sample-build --list
  
  # List the environment variables defined on all pods
  kubectl set env pods --all --list
  
  # Output modified deployment in YAML, and does not alter the object on the server
  kubectl set env deployment/sample-build STORAGE_DIR=/data -o yaml
  
  # Update all containers in all replication controllers in the project to have ENV=prod
  kubectl set env rc --all ENV=prod
  
  # Import environment from a secret
  kubectl set env --from=secret/mysecret deployment/myapp
  
  # Import environment from a config map with a prefix
  kubectl set env --from=configmap/myconfigmap --prefix=MYSQL_ deployment/myapp
  
  # Import specific keys from a config map
  kubectl set env --keys=my-example-key --from=configmap/myconfigmap deployment/myapp
  
  # Remove the environment variable ENV from container 'c1' in all deployment configs
  kubectl set env deployments --all --containers="c1" ENV-
  
  # Remove the environment variable ENV from a deployment definition on disk and
  # update the deployment config on the server
  kubectl set env -f deploy.json ENV-
  
  # Set some of the local shell environment into a deployment config on the server
  env | grep RAILS_ | kubectl set env -e - deployment/registry

Options

--all

If true, 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.
-c, --containers string     Default: "*"

The names of containers in the selected pod templates to change - may use wildcards
--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.
-e, --env strings

Specify a key-value pair for an environment variable to set into each container.
--field-manager string     Default: "kubectl-set"

Name of the manager used to track field ownership.
-f, --filename strings

Filename, directory, or URL to files the resource to update the env
--from string

The name of a resource from which to inject environment variables
-h, --help

help for env
--keys strings

Comma-separated list of keys to import from specified resource
-k, --kustomize string

Process the kustomization directory. This flag can't be used together with -f or -R.
--list

If true, display the environment and any changes in the standard format. this flag will removed when we have kubectl view env.
--local

If true, set env will NOT contact api-server but run locally.
-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

If true, allow environment to be overwritten, otherwise reject updates that overwrite existing environment.
--prefix string

Prefix to append to variable names
-R, --recursive

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

If true, show secret or configmap references when listing variables
-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.
--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].

--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.
--azure-container-registry-config string

Path to the file containing Azure container registry configuration information.
--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

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Last modified January 06, 2024 at 2:39 PM PST: Revise kubectl reference layout (7100b9ce32)