Goal

Understand batch workloads with bounded runtime, logs, retry rules and automatic cleanup.

What Is Done

The lab creates a one-time Job that calculates a checksum and a CronJob that creates report Jobs every 15 minutes.

Typical Commands

kubectl apply -f manifests/
kubectl get job,cronjob,pod -n batch-lab
kubectl logs -n batch-lab job/checksum-once
kubectl describe cronjob cleanup-report -n batch-lab

Validate Success

• checksum-once reaches Complete.
• Logs contain a SHA-256 checksum.
• The CronJob shows schedule, history limits and concurrency policy.

Common Mistakes

• restartPolicy is missing or does not fit the Job type.
• The cron expression is too aggressive for training clusters.
• Missing history limits allow old Jobs to accumulate.