List of most important commands

Assumption: Use of kas alias for kubectrl

Generic

• List names of all resources: k api-resources
• List resources in default namespace: k get RESOURCE_TYPE
• List resources in specified namespace: k get RESOURCE_TYPE -n NAMESPACE

• List resources in all namespaces: k get RESOURCE_TYPE -A

• Describe resource k describe RESOURCE_NAME

• Create definition file of existing resource: k get RESOURCE_TYPE RESOURCE_NAME -o yaml > FILENAME.yaml

• Create resource with existing definition file: k create -f FILENAME.yaml

• Edit exisiting resource: k edit RESOURCE_TYPE RESOURCE_NAME

• Repace existing resource: k replace --force -f FILENAME.yaml

Pods

• Create Pod: k run POD_NAME --image=IMAGE_NAME
• Create definition file for Pod: k run POD_NAME --image=IMAGE_NAME --dry-run=client -o yaml > FILENAME.yaml

ReplicaSets

• Up/Down-Scale: k scale --replicas=NEW_NUMBER rs/RS_NAME

Namespaces

• Switch permanently to namespace: k config set-context $(k config current-context) --namespace=NAMESPACE

Services

• Expose a service for a Pod: k expose pod POD_NAME --port=PORT --name=SRV_NAME
• Create a Pod and expose a service (same name): k run POD_NAME --image=IMAGE_NAME --port=PORT --expose=true

Docker images

• Create: docker build -t IMAGE_NAME PATH_TO_DOCKERFILE
• Run an instance: docker run -p EXPOSED_PORT:APP_PORT IMAGE_NAME
• Run command in instance: docker run IMAGE_NAME cat /etc/*release*

Links

• Documentation
• Reference Guide