Few kubectl commands that will be helpful in troubleshooting K8S environments
Cheat Sheet
Sort events by timestamp
kubectl get events --sort-by='.metadata.creationTimestamp'
Get list of resources stuck in a namespace
kubectl api-resources --verbs=list --namespaced -o name | xargs -n 1 kubectl get --show-kind --ignore-not-found -n <namespace>
Delete namespace stuck in Terminating Status
kubectl get namespace NAMESPACE -o json > NAMESPACE.json
Remove kubernetes from finalizers array which is under spec
kubectl replace --raw "/api/v1/namespaces/NAMESPACE/finalize" -f ./NAMESPACE.json
Get list of pods sorted by node name
kubectl get pods --all-namespaces -o wide --sort-by="{.spec.nodeName}"
Get list of images running on your cluster
kubectl get pods --all-namespaces -o jsonpath="{..image}" | tr -s '[[:space:]]' '\n' | sort | uniq -c
Get list of PODs in not running state
kubectl get pods --field-selector=status.phase!=Running --all-namespaces