Job

Concept and Usage of Job

Job will create one or more pods. The job will be considered as completed when all the pods inside the job are completed. When you delete a job, the pods created by the job will be deleted too.

Use case;

• Running a batch Job
• Backup operation

apiVersion: batch/v1
kind: Job
metadata:
  name: backup-job
spec:
  completions: 3 # run 3 pods
  parallelism: 2 # parallel run 2 pods at a time
  template: # pod template
    spec:
      containers:
        - name: backup
          image: busybox
          command: ["echo", "Backup operation"]
      restartPolicy: Never

If some of the pods fail, the job will create new pods to replace the failed ones until the specified number of completions (3) is achieved. The job will keep retrying until all Pods have successfully completed or the job is deleted. However, since the restartPolicy is set to Never, the pod will not be restarted if it fails, instead, new Pod will be created to replace them.

kubectl get jobs
kubectl delete job <job-name>