k8s-commands

k8s-commands.txt

# see: https://kubernetes.io/docs/user-guide/kubectl-cheatsheet/

brew upgrade kubernetes-cli
brew list kubectl --versions
brew info kubectl
brew switch kubectl 1.7.5

# get current context
  $ kubectl config current-context
# change current context
  $ kubectl config use-context my-cluster-name
# run proxy and serve dashbord ui on http://127.0.0.1:8001/ui
  $ kubectl proxy --port=8001
  $ curl http://localhost:8001/api/

# pods
  $ kubectl get pods
  $ kubectl describe pod POD_NAME
  $ kubectl exec POD_NAME -- ls
  $ kubectl exec POD_NAME -- env
  $ kubectl exec -it POD_NAME /bin/bash
  $ kubectl delete pod POD_NAME --force --grace-period=0
  
# nodes
  $ kubectl describe nodes

# secrets (must be base64 encoded)
    # example secret-value: ABC!DEF (to be base64 encoded)
    # base64 encode (remove newlines, escape special chars)
    $ echo -n ABC\!DEF | base64 # returns: QUJDIURFRg==
    $ echo QUJDIURFRg== | base64 --decode # returns: ABC!DEF
    
# docker image (bash endless loop)
        image: IMAGE_NAME
        command: [ "/bin/bash", "-c", "--" ]
        args: [ "while true; do sleep 30; done;" ]