컨텍스트 리스트 출력

kubectl config get-contexts

현재 컨텍스트 출력

kubectl config current-context

delete context

https://stackoverflow.com/questions/37016546/kubernetes-how-do-i-delete-clusters-and-contexts-from-kubectl-config

kubectl config delete-cluster <클러스터명>

Managing secret using kubectl

https://kubernetes.io/docs/tasks/configmap-secret/managing-secret-using-kubectl/

create secret

kubectl create secret generic db-user-pass \
  --from-file=username=./username.txt \
  --from-file=password=./password.txt

select secret

kubectl get secrets

kubectl describe secrets/db-user-pass

kubectl get secret db-user-pass -o jsonpath='{.data}'

echo 'MWYyZDFlMmU2N2Rm' | base64 --decode

delete secret

kubectl delete secret db-user-pass