Exercise 6.3: Working with Jobs

1. CP 노드에 연결된 터미널로 이동

2. Job 생성

   cat <<EOF | kubectl create -f -
   apiVersion: batch/v1
   kind: Job
   metadata:
     name: sleepy
   spec:
     template:
       spec:
         containers:
         - name: resting
           image: busybox
           command: ["/bin/sleep"]
           args: ["3"]
         restartPolicy: Never
   EOF

3. 생성된 Job 상태 확인

   kubectl get job sleepy

4. 생성된 Job의 상세 내용 확인

   kubectl describe job sleepy

5. 생성된 Job의 Manifest를 YAML 형식으로 출력

   kubectl get job sleepy -o yaml | grep -A 5 -B 1 ^spec

6. Job 삭제

   kubectl delete job sleepy

7. Job 생성

   cat <<EOF | kubectl create -f -
   apiVersion: batch/v1
   kind: Job
   metadata:
     name: sleepy
   spec:
     completions: 5
     template:
       spec:
         containers:
         - name: resting
           image: busybox
           command: ["/bin/sleep"]
           args: ["3"]
         restartPolicy: Never
   EOF

8. 생성된 Job 및 Pod 상태 확인

   kubectl get job,pod -l job-name=sleepy

9. Job 삭제

   kubectl delete job sleepy

10. Job 생성

    cat <<EOF | kubectl create -f -
    apiVersion: batch/v1
    kind: Job
    metadata:
      name: sleepy
    spec:
      completions: 5
      parallelism: 2
      template:
        spec:
          containers:
          - name: resting
            image: busybox
            command: ["/bin/sleep"]
            args: ["3"]
          restartPolicy: Never
    EOF

11. 생성된 Job 및 Pod 상태 확인

    kubectl get job,pod -l job-name=sleepy

12. Job 삭제

    kubectl delete job sleepy

13. Job 생성

    cat <<EOF | kubectl create -f -
    apiVersion: batch/v1
    kind: Job
    metadata:
      name: sleepy
    spec:
      completions: 5
      parallelism: 2
      activeDeadlineSeconds: 15
      template:
        spec:
          containers:
          - name: resting
            image: busybox
            command: ["/bin/sleep"]
            args: ["5"]
          restartPolicy: Never
    EOF

14. 생성된 Job 상태 확인

    kubectl get job sleepy

15. 생성된 Job의 status.conditions 확인

    kubectl get job sleepy -ojsonpath='{.status.conditions}' | jq

16. Job 삭제

    kubectl delete job sleepy

17. CronJob 생성

    cat <<EOF | kubectl create -f -
    apiVersion: batch/v1
    kind: CronJob
    metadata:
      name: sleepy
    spec:
      schedule: "*/1 * * * *"
      jobTemplate:
        spec:
          template:
            spec:          
              containers:
              - name: resting
                image: busybox
                command: ["/bin/sleep"]
                args: ["5"]
              restartPolicy: Never
    EOF

18. 생성된 CronJob 상태 확인

    kubectl get cronjob sleepy

19. Job 목록 확인

    kubectl get job

20. Pod 목록 확인

    kubectl get pod

21. CronJob 삭제

    kubectl delete cronjob sleepy

22. CronJob 생성

    cat <<EOF | kubectl create -f -
    apiVersion: batch/v1
    kind: CronJob
    metadata:
      name: sleepy
    spec:
      schedule: "*/1 * * * *"
      jobTemplate:
        spec:
          template:
            spec:
              activeDeadlineSeconds: 10          
              containers:
              - name: resting
                image: busybox
                command: ["/bin/sleep"]
                args: ["30"]
              restartPolicy: Never
    EOF

23. 생성된 CronJob 상태 확인

    kubectl get cronjob sleepy

24. Job 목록 확인

    kubectl get job

25. CronJob 삭제

    kubectl delete cronjob sleepy