set

These commands help you make changes to existing application resources.

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 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

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.

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

Usage

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

Flags

image

Set a deployment’s nginx container image to ‘nginx:1.9.1’, and its busybox container image to ‘busybox’

kubectl set image deployment/nginx busybox=busybox nginx=nginx:1.9.1

Update all deployments’ and rc’s nginx container’s image to ‘nginx:1.9.1’

kubectl set image deployments,rc nginx=nginx:1.9.1 --all

Update image of all containers of daemonset abc to ‘nginx:1.9.1’

kubectl set image daemonset abc *=nginx:1.9.1

Print result (in yaml format) of updating nginx container image from local file, without hitting the server

kubectl set image -f path/to/file.yaml nginx=nginx:1.9.1 --local -o yaml

Update existing container image(s) of resources.

Possible resources include (case insensitive):

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

Usage

$ kubectl set image (-f FILENAME | TYPE NAME) CONTAINER_NAME_1=CONTAINER_IMAGE_1 ... CONTAINER_NAME_N=CONTAINER_IMAGE_N

Set a deployments nginx container cpu limits to “200m” and memory to “512Mi”

kubectl set resources deployment nginx -c=nginx --limits=cpu=200m,memory=512Mi

Remove the resource requests for resources on containers in nginx

kubectl set resources deployment nginx --limits=cpu=0,memory=0 --requests=cpu=0,memory=0

Print the result (in yaml format) of updating nginx container limits from a local, without hitting the server

Specify compute resource requirements (CPU, memory) for any resource that defines a pod template. If a pod is successfully scheduled, it is guaranteed the amount of resource requested, but may burst up to its specified limits.

For each compute resource, if a limit is specified and a request is omitted, the request will default to the limit.

Usage

$ kubectl set resources (-f FILENAME | TYPE NAME) ([--limits=LIMITS & --requests=REQUESTS]

Flags

selector

Set the labels and selector before creating a deployment/service pair

kubectl create service clusterip my-svc --clusterip="None" -o yaml --dry-run=client | kubectl set selector --local -f - 'environment=qa' -o yaml | kubectl create -f -
kubectl create deployment my-dep -o yaml --dry-run=client | kubectl label --local -f - environment=qa -o yaml | kubectl create -f -

Set the selector on a resource. Note that the new selector will overwrite the old selector if the resource had one prior to the invocation of ‘set selector’.

A selector must begin with a letter or number, and may contain letters, numbers, hyphens, dots, and underscores, up to 63 characters. If —resource-version is specified, then updates will use this resource version, otherwise the existing resource-version will be used. Note: currently selectors can only be set on Service objects.

Usage

$ kubectl set selector (-f FILENAME | TYPE NAME) EXPRESSIONS [--resource-version=version]

Set deployment nginx-deployment’s service account to serviceaccount1

kubectl set serviceaccount deployment nginx-deployment serviceaccount1

Print the result (in YAML format) of updated nginx deployment with the service account from local file, without hitting the API server

kubectl set sa -f nginx-deployment.yaml serviceaccount1 --local --dry-run=client -o yaml

Update the service account of pod template resources.

Possible resources (case insensitive) can be:

replicationcontroller (rc), deployment (deploy), daemonset (ds), job, replicaset (rs), statefulset

Usage

$ kubectl set serviceaccount (-f FILENAME | TYPE NAME) SERVICE_ACCOUNT

Flags

subject

Update a cluster role binding for serviceaccount1

kubectl set subject clusterrolebinding admin --serviceaccount=namespace:serviceaccount1

Update a role binding for user1, user2, and group1

Update the user, group, or service account in a role binding or cluster role binding.

Usage

$ kubectl set subject (-f FILENAME | TYPE NAME) [--user=username] [--group=groupname] [--serviceaccount=namespace:serviceaccountname] [--dry-run=server|client|none]