Kubectl cheatsheet
Throughout the years of using kubernetes as a developer I’ve collected a bunch of useful commands that helped me to debug issues and have better understanding of what is happening in the cluster.
List all namespaces
kubectl get namespace
List all pods in namespace site
kubectl get pods -n site
Set default namespace
kubectl config set-context --current --namespace=<namespace-name>
Watch for deploy of pods with label app: discounts-endpoint-app
kubectl get pods --selector=app=discounts-endpoint-app --watch
Explain what parameters in deployment mean
kubectl explain deploy
kubectl explain deploy.spec
kubectl explain deploy.spec.strategy
Show pods sorted by how many times they were restarted
kubectl get pods --sort-by='.status.containerStatuses[0].restartCount'
Watch for container logs
kubectl logs <pod-name> -f
Show pod logs before restart
kubectl logs <pod-name> --previous
Show pods container image version
kubectl get pods -o custom-columns='NAME:metadata.name,IMAGES:spec.containers[*].image'
Find pod by IP address
kubectl get pods -o wide|grep 10.164.174.138
List configmaps
kubectl get configmap
Show configmap content in YAML
kubectl get configmap <configmap-name> -o yaml
Useful links:
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