CKAD - Commands

• Show Labels
  k get po --show-label

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• Delete pod with label
  k delete po -l app=webapp

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• Delete pod without wait
  k delete po my-app --grace-period=0 --force

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• Generate template with command
  k run my-app --image ubuntu --dry-run=client -o yaml --command -- sleep 10

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• Generate template with args
  k run my-app --image ubuntu --dry-run=client -o yaml -- sh

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• Get all api resources
  k api-resources

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• Create pod with env variable
  k run my-app --image ubuntu --env MY_KEY=foo

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• Explain resource and find it
  k explain pod --recursive | grep -C5 -i env

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• Set serviceaccount to deployement
  k set sa deployment my-app my-sa

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• Get CPU / Memory
  k top pod k top node

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• Get resource by label
  k get po --selector env=dev
k get all --selector env=prod,bu=finance,tier=frontend

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• Set context
  k config --kubeconfig=/root/my-kube-config current-context my-context

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• Run command as a different use
  k get pods --as dev-user

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• Get list of default admission-plugins
  kubectl exec -it -n kube-system kube-apiserver-controlplane -- kube-apiserver -h | grep -i enable-admission-plugins

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• Enable api verison alphav1
  add --runtime-config=rbac.authorization.k8s.io/v1alpha1 in /etc/kubernetes/manifests/kube-apiserver.yaml
• Convert api version using kubectl version
  kubectl-convert -f ingress-old.yaml -- output-version networking.k8s.io/v1

kubectl-convert -f ingress-old.yaml -- output-version networking.k8s.io/v1

Vim Shortcuts

• Starting of line
  0

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• End of line
  $

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• Undo
  u

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• Redo
  ctrl + r

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• Append
  a

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• Multi line edit (add in front)
  control + v --> select lines --> shift + i --> add your changes --> esc

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• Multi line edit (delete in front)
  control + v --> select lines --> select area --> d --> add your changes --> esc

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