kubernetes version: 1.8 - Date: October 2017

Kubectl Autocomplete

Setup autocomplete in bash apt install bash-completion source <(kubectl completion bash)

Context and Configuration

Show kubeconfig settings kubectl config view

Set the default context (cluster) kubectl config use-context CLUSTER-NAME

Creating Objects

Create resource(s) kubectl create -f FILE.yaml [FILE2.yaml]

• Create app-v1 from a file: kubectl create -f app-v1.yaml

Create resource(s) in all manifest files in a directory kubectl create -f PATH/DIR/

Create resource(s) from url kubectl create -f https://URL

Run a single instance (pod) kubectl run NAME ARGS

• Start a single instance (pod) of nginx kubectl run nginx --image=nginx

Viewing, Finding Resources

List main resources kubectl get all

List all services in the namespace kubectl get services [--namespace NS]

List all pods in all namespaces kubectl get pods --all-namespaces

List a particular deployment kubectl get deployment DEPLOYMENT

Get the version label of all pods with label version=v1

kubectl get pods --selector=version=v1

Describe commands with verbose output kubectl describe nodes NODE kubectl describe pods POD

Updating Resources

Rolling update kubectl rolling-update POD ARGS

• Rolling update pods of app-v1: kubectl rolling-update app-v1 -f app-v2.yaml

• Change the name of the resource and update the image: kubectl rolling-update app-v1 app-v2 --image=image:v2

Force replace, delete and then re-create the resource. Will cause a service outage. kubectl replace --force -f POD.json