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KUBERNETES(1)(kubernetes) KUBERNETES(1)(kubernetes)
Eric Paris Jan 2015


kubectl set env - Update environment variables on a pod template


kubectl set env [OPTIONS]


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)


--all=false If true, select all resources in the namespace of the specified resource types

--allow-missing-template-keys=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="*" The names of containers in the selected pod templates to change - may use wildcards

--dry-run="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=[] Specify a key-value pair for an environment variable to set into each container.

--field-manager="kubectl-set" Name of the manager used to track field ownership.

-f, --filename=[] Filename, directory, or URL to files the resource to update the env

--from="" The name of a resource from which to inject environment variables

--keys=[] Comma-separated list of keys to import from specified resource

-k, --kustomize="" Process the kustomization directory. This flag can't be used together with -f or -R.

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

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

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

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

--prefix="" Prefix to append to variable names

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

--resolve=false If true, show secret or configmap references when listing variables

-l, --selector="" 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=false If true, keep the managedFields when printing objects in JSON or YAML format.

--template="" Template string or path to template file to use when -o=go-template, -o=go-template-file. The template format is golang templates [].


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

--as-group=[] Group to impersonate for the operation, this flag can be repeated to specify multiple groups.

--as-uid="" UID to impersonate for the operation.

--azure-container-registry-config="" Path to the file containing Azure container registry configuration information.

--cache-dir="/home/abuild/.kube/cache" Default cache directory

--certificate-authority="" Path to a cert file for the certificate authority

--client-certificate="" Path to a client certificate file for TLS

--client-key="" Path to a client key file for TLS

--cluster="" The name of the kubeconfig cluster to use

--context="" The name of the kubeconfig context to use

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

--insecure-skip-tls-verify=false If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure

--kubeconfig="" Path to the kubeconfig file to use for CLI requests.

--match-server-version=false Require server version to match client version

-n, --namespace="" If present, the namespace scope for this CLI request

--password="" Password for basic authentication to the API server

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

--profile-output="profile.pprof" Name of the file to write the profile to

--request-timeout="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="" The address and port of the Kubernetes API server

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

--token="" Bearer token for authentication to the API server

--user="" The name of the kubeconfig user to use

--username="" Username for basic authentication to the API server

--version=false Print version information and quit

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


# 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




January 2015, Originally compiled by Eric Paris (eparis at redhat dot com) based on the kubernetes source material, but hopefully they have been automatically generated since!

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