[kubectl magic] cheatsheet #k8s

k8s-magic

# export, import secrets < 1.14
kubectl get secret $my-secret --export -o yaml -n $source-ns | kubectl -n $target-ns apply -f - 

# export => 1.14
SECRET= SOURCE= TARGET= \
&& kubectl get secret $SECRET --namespace=$SOURCE -o yaml | sed "s/namespace: .*/namespace: $TARGET/" | kubectl apply -f -

# force delete resources
kubectl -n prometheus delete --force --grace-period=0 pod 

# run pod from any image
kubectl run -i --tty busybox --image=busybox --restart=Never -- bash

# get service ingress lb
kubectl get svc -A | grep -i nginx


# headless service SRV record lookup
kubectl run -i --tty busybox --image=k8s.gcr.io/e2e-test-images/jessie-dnsutils:1.3 --restart=Never -- bash
nslookup -type=srv apache-kafka-headless

# lookup resource descriptions
kubectl explain pods