What is Kubernetes Job and CronJob?

Question

Accepted Answer

**Job** — runs Pods to completion. **CronJob** — runs Jobs on a schedule.

```yaml
# Job
apiVersion: batch/v1
kind: Job
metadata:
  name: data-migration
spec:
  completions: 1
  parallelism: 1
  backoffLimit: 3
  template:
    spec:
      containers:
      - name: migrate
        image: myapp:latest
        command: ["python", "migrate.py"]
      restartPolicy: Never
---
# CronJob
apiVersion: batch/v1
kind: CronJob
metadata:
  name: daily-report
spec:
  schedule: "0 2 * * *"
  jobTemplate:
    spec:
      template:
        spec:
          containers:
          - name: report
            image: myapp:latest
            command: ["python", "report.py"]
          restartPolicy: OnFailure
```

**Key fields:**
- completions: total Pods to complete.
- parallelism: concurrent Pods.
- backoffLimit: retry count.
- schedule: cron expression.

DevOps: What is Kubernetes Job and CronJob?