https://kubernetes.io/de/docs/reference/kubectl/cheatsheet/
kubectl run -i -tty busybox --image=busybox -n namespace -- sh
kubectl run -i -tty alpine --image=alpine -n namespace -- sh
kubectl get pod -o="custom-columns=NAME:.metadata.name,INIT-CONTAINERS:.spec.initContainers[*].name,CONTAINERS:.spec.containers[*].name" -n namespace - Shows a list of pods in the namespace including the containers
kubectl cp alpine:message.avro ~/message.avro - copies a file from a pod to the local directory
kubectl get pods -n namespace -o=custom-columns=NAME:.metadata.name | grep "flink" | xargs -I POD kubectl delete pod POD -n namespace - Deletes a range of pods depending on the name`
kubectl get deployments
kubectl scale deployment <deploymentname> --replicas=1
kubectl logs pod/foobar container-name -n namespace --follow - Show logs of foobar pod and container-name container
kubectl logs deployment/foobar -c app -n namespace --follow - Show logs of foobar deployment
kubectl get pods -o=custom-columns=NAME:.metadata.name | grep "grafana" | xargs -I POD kubectl logs pod/POD -c grafana --follow - Shows the logs from a pod depending on the name for a specific container
kubectl exec --stdin --tty somepod -- /bin/bash - Gets a shell to a running container
kubectl get pods -o=custom-columns=NAME:.metadata.name | grep "grafana" | xargs -I POD kubectl exec -it POD -c grafana -- bash - Execs the bash of a pod depending on the name for a specific container
https://kubernetes.io/docs/tasks/debug/debug-application/get-shell-running-container/
kubectl describe configmap/configmapname -n namespace - Shows the config map configmapname
kubectl edit configmap/configmapname -n namespace - Edits the configmap
kubectl create configmap/configmapname -n namespace --from-file=ca-certirifcates.crt - Adds a certificate from a file
kubectl delete configmap/configmapname -n namespace - Deletes a secret
https://kubernetes.io/docs/concepts/configuration/configmap/
kubectl get secret/keystore -o jsonpath='{.data}' -n tsmb | jq '."keystore.p12"' | tr -d \" | base64 -decode > keystore.p12
kubectl create secret/somesecret -n namespace --from-literal="foo=bar" - Adds a secret from a literal
kubectl create -f secret.yaml - Adds a secret from a yaml file
kubectl delete secret/somesecret -n namespace - Deletes a secret
https://kubernetes.io/docs/concepts/configuration/secret/
kubectl get nodes - Shows the nodes
`kubectl apply -f https://raw.githubusercontent.com/prometheus-operator/prometheus-operator/master/bundle.yaml' - Applies the custom resource definition at the given url
kubectl get crds - Gets the state of the crd requests
kubectl get api-resources - List the api resources managed by the cluster
kubectl port-forward svc/alertmanager-operated 9093:9093 - Forwards the given service port to localhost 9093
kubectl get issuer - Gets the issuer of the cert manager
kubectl get clusterissuer - Gets the cluster issuer of the cert manager
kubectl describe certificaterequest example-com-2745722290 - Returns more information about a specific certificate request
kubectl describe order example-com-2745722290-439160286 - Returns more information about a specific order
kubectl describe challenge example-com-2745722290-4391602865-0 - Returns more information about a specific challenge
kubectl config view - Shows kubectl config configuration
kubectl config view -o jsonpath='{.users[].name}' - Shows user names in kubectl config configuration
kubectl config use-context my-cluster-name - Sets the current context to my-cluster-name
kubectl config unset current-context - Resets the current context
kustomize build . - Performs a kustomize build
kustomize build . | kubectl apply -f - - Performs a kustomize build and passes the result to kubectl apply