Case

Kubernetes: CrashLoopBackOff

A pod keeps restarting. Logs and describe output are used to identify the failure and apply the fix.

GitHub Project All Cases

ProblemAfter deployment, the pod repeatedly restarts and never becomes Ready.
SolutionUse logs and describe output to find the failing configuration/command, fix config or image entrypoint, then redeploy.
Toolskubectl logs/describe/events · ConfigMaps/Secrets · probes
OutcomePod becomes stable, Ready endpoints appear, traffic works again.

kubectl get pods -n <ns>

kubectl describe pod <pod> -n <ns>

kubectl logs <pod> -n <ns> --previous

kubectl get events -n <ns> --sort-by=.lastTimestamp | tail

systemctl status <service> --no-pager

journalctl -u <service> -n 200 --no-pager