如何使用kubectl查看失败作业的日志？

Question

我创造了一个已经失败的Kubernetes工作。我在哪里能找到这份工作的日志？

我不知道如何找到相关的吊舱(我假设一旦作业失败，它就会删除吊舱)？

运行kubectl describe job似乎没有显示任何相关信息：

Name:           app-raiden-migration-12-19-58-21-11-2018
Namespace:      localdev
Selector:       controller-uid=c2fd06be-ed87-11e8-8782-080027eeb8a0
Labels:         jobType=database-migration
Annotations:    kubectl.kubernetes.io/last-applied-configuration={"apiVersion":"batch/v1","kind":"Job","metadata":{"annotations":{},"labels":{"jobType":"database-migration"},"name":"app-raiden-migration-12-19-58-21-1...
Parallelism:    1
Completions:    1
Start Time:     Wed, 21 Nov 2018 12:19:58 +0000
Pods Statuses:  0 Running / 0 Succeeded / 1 Failed
Pod Template:
  Labels:  controller-uid=c2fd06be-ed87-11e8-8782-080027eeb8a0
           job-name=app-raiden-migration-12-19-58-21-11-2018
  Containers:
   app:
    Image:  pp3-raiden-app:latest
    Port:   <none>
    Command:
      php
      artisan
      migrate
    Environment:
      DB_HOST:        local-mysql
      DB_PORT:        3306
      DB_DATABASE:    raiden
      DB_USERNAME:    <set to the key 'username' in secret 'cloudsql-db-credentials'>  Optional: false
      DB_PASSWORD:    <set to the key 'password' in secret 'cloudsql-db-credentials'>  Optional: false
      LOG_CHANNEL:    stderr
      APP_NAME:       Laravel
      APP_KEY:        ABCDEF123ERD456EABCDEF123ERD456E
      APP_URL:        http://192.168.99.100
      OAUTH_PRIVATE:  <set to the key 'oauth_private.key' in secret 'laravel-oauth'>  Optional: false
      OAUTH_PUBLIC:   <set to the key 'oauth_public.key' in secret 'laravel-oauth'>   Optional: false
    Mounts:           <none>
  Volumes:            <none>
Events:
  Type     Reason                Age   From            Message
  ----     ------                ----  ----            -------
  Normal   SuccessfulCreate      2m    job-controller  Created pod: app-raiden-migration-12-19-58-21-11-2018-pwnjn
  Warning  BackoffLimitExceeded  2m    job-controller  Job has reach the specified backoff limit

Answer 1

另一种办法是：

• kubectl describe job $JOB
• 荚名称显示在"Events“下面。
• kubectl logs $POD

Answer 2

您也可以执行

kubectl logs job.batch/your-job-name

如果作业有多个吊舱，您将看到一条类似于以下内容的消息：

Found X pods, using pod/your-job-name-xxxxx

(使用kubectl版本=1.21.2进行测试)

Answer 3

使用此命令显示所有豆荚，甚至失败的豆荚：

kubectl get pods -A

然后一个吊舱将显示如下所示：

app-raiden-migration-12-19-58-21-11-2018-pwnjn   0/1       Error     0          6m

然后使用：

kubectl logs lighthouse-timer-1553800620-pwssv