— This is a living post — New commands will be added as I discover any of use —
Basics
#get information about namespace kubectl describe namespaces <namespace> #get information about a pod kubectl describe pods <podname> -n <namespace> #delete pod in specific namespace kubectl delete pods -n <namespace> <pod_name> #logs for specific pod kubectl logs <podname> #cordon off node kubectl cordon <nodename> #list Services kubectl get services #delete all namespaces kubectl delete --all namespaces
Useful
#count number of returned pods kubectl get pods -n <namespace> | wc -l #change lifetime of namespace kubectl annotate namespaces <namespace>/lifetime-minutes=400 --overwrite #find pods running on same node and output in wide format kubectl get pods --all-namespaces --field-selector spec.nodeName=<nodename> -o wide #logs for specific container on pod kubectl logs <podname> -c <containername> #watch nodes kubectl get nodes -w #execute shell in container on pod kubectl exec -it <podname> -- bash #List nodes with their labels kubectl get nodes --show-labels #FORCE delete when pods are stuck in TERMINATING kubectl delete pods --grace-period=0 --force --all --namespace <namespace> #Get all pods in all namespaces kubectl get pods --all-namespaces --output=wide
Utility
#scale all deployments
kubectl scale --replicas=0 deployment $'kubectl get deployments -n <namespace> |awk -F' ' '{ print $1 }'' -n <namespace>
#drain node
kubectl drain <nodename> --force --ignore-daemonsets --delete-local-data
#show usage for node
kubectl top node <nodename>
#Show usage for pod
kubectl top <podname>
#follow logs
kubectl get logs <pod-name> -n <namespace> -f
#View running container environment variables
kubectl exec -it -n <ci-namespace> >runner-pod> env | grep <CI_BUILD>
