Udemy Labs - Certified Kubernetes Application Developer - Jobs and CronJobs 오답노트

3
Monitor and wait for the job to succeed. Throughout this practice test remember to increase the 'BackOffLimit' to prevent the job from quitting before it succeeds.

Check out the documentation page about the BackOffLimit property.

그저 6이 나와야 성공하는 job이니까 backoffLimit의 숫자를 높이면 된다고 생각했는데 계속 오류가 났음

[풀이]
2번에서 job을 만들때 내가 만든 yaml파일은

apiVersion: batch/v1
kind: Job
metadata:
  name: throw-dice-job
spec:
  template:
    spec:
      containers:
      - name: throw-dice-job
        image: kodekloud/throw-dice
        command: ["6"]
      restartPolicy: Never
  backoffLimit: 15

이거였는데 command는 필요하지 않았다.

apiVersion: batch/v1
kind: Job
metadata:
  name: throw-dice-job
spec:
  template:
    spec:
      containers:
      - name: throw-dice-job
        image: kodekloud/throw-dice
      restartPolicy: Never
  backoffLimit: 15

이렇게 만들고 Succeeded가 생길때까지 기다리면 됨

controlplane ~ ➜  k describe job throw-dice-job 
Name:             throw-dice-job
Namespace:        default
Selector:         batch.kubernetes.io/controller-uid=93e7eb2a-fb96-4265-ac1a-9bf7fd191a9d
Labels:           batch.kubernetes.io/controller-uid=93e7eb2a-fb96-4265-ac1a-9bf7fd191a9d
                  batch.kubernetes.io/job-name=throw-dice-job
                  controller-uid=93e7eb2a-fb96-4265-ac1a-9bf7fd191a9d
                  job-name=throw-dice-job
Annotations:      <none>
Parallelism:      1
Completions:      1
Completion Mode:  NonIndexed
Suspend:          false
Backoff Limit:    15
Start Time:       Sun, 26 Jan 2025 07:03:04 +0000
Completed At:     Sun, 26 Jan 2025 07:03:38 +0000
Duration:         34s
Pods Statuses:    0 Active (0 Ready) / 1 Succeeded / 2 Failed
Pod Template:
  Labels:  batch.kubernetes.io/controller-uid=93e7eb2a-fb96-4265-ac1a-9bf7fd191a9d
           batch.kubernetes.io/job-name=throw-dice-job
           controller-uid=93e7eb2a-fb96-4265-ac1a-9bf7fd191a9d
           job-name=throw-dice-job
  Containers:
   throw-dice-job:
    Image:         kodekloud/throw-dice
    Port:          <none>
    Host Port:     <none>
    Environment:   <none>
    Mounts:        <none>
  Volumes:         <none>
  Node-Selectors:  <none>
  Tolerations:     <none>
Events:
  Type    Reason            Age   From            Message
  ----    ------            ----  ----            -------
  Normal  SuccessfulCreate  50s   job-controller  Created pod: throw-dice-job-w7ht2
  Normal  SuccessfulCreate  39s   job-controller  Created pod: throw-dice-job-sm7z6
  Normal  SuccessfulCreate  19s   job-controller  Created pod: throw-dice-job-sdt2n
  Normal  Completed         16s   job-controller  Job completed

5
Update the job definition to run as many times as required to get 2 successful 6's.

Delete existing job and create a new one with the given spec. Monitor and wait for the job to succeed.

Job Name: throw-dice-job

Image Name: kodekloud/throw-dice

Completions: 2

Job Succeeded: True

정답
completions의 위치는 spec 밑에...

apiVersion: batch/v1
kind: Job
metadata:
  name: throw-dice-job
spec:
  completions: 2
  backoffLimit: 25 # This is so the job does not quit before it succeeds.
  template:
    spec:
      containers:
      - name: throw-dice
        image: kodekloud/throw-dice
      restartPolicy: Never