k8s-job

Job

Job 负责批处理任务，即仅执行一次的任务，它保证批处理任务的一个或多个 Pod 成功结束

特殊说明
spec.template格式同Pod
RestartPolicy仅支持Never或OnFailure
单个Pod时，默认Pod成功运行后Job即结束
.spec.completions 标志Job结束需要成功运行的Pod个数，默认为1
.spec.parallelism 标志并行运行的Pod的个数，默认为1
spec.activeDeadlineSeconds 标志失败Pod的重试最大时间，超过这个时间不会继续重试

apiVersion: batch/v1
kind: Job
metadata:
  name: pi
spec:
  template:
    metadata:
      name: pi
    spec:
      containers:
      - name: pi
        image: perl
        command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"]
      restartPolicy: Never

创建&&查看

[root@k8s-master01 ~]# kubectl create -f job.yaml 
job.batch/pi created
[root@k8s-master01 ~]# kubectl  get pod
NAME                                READY   STATUS              RESTARTS   AGE
deamonset-example-hj7nf             1/1     Running             0          6m55s
deamonset-example-wfg78             1/1     Running             0          6m55s
nginx-deployment-5754944d6c-2tp4g   1/1     Running             0          127m
nginx-deployment-5754944d6c-55z46   1/1     Running             0          127m
nginx-deployment-5754944d6c-kkg5t   1/1     Running             0          127m
pi-wbxwp                            0/1     ContainerCreating   0          44s
[root@k8s-master01 ~]# kubectl  describe pod pi-wbxwp
.....
Normal  Scheduled  68s   default-scheduler    Successfully assigned default/pi-wbxwp to k8s-node02
  Normal  Pulling    68s   kubelet, k8s-node02  Pulling image "perl"
[root@k8s-master01 ~]# kubectl get job
NAME   COMPLETIONS   DURATION   AGE
pi     1/1           83s        100s

[root@k8s-master01 ~]# kubectl get pod
NAME                                READY   STATUS      RESTARTS   AGE
deamonset-example-hj7nf             1/1     Running     0          36m
deamonset-example-wfg78             1/1     Running     0          36m
nginx-deployment-5754944d6c-2tp4g   1/1     Running     0          157m
nginx-deployment-5754944d6c-55z46   1/1     Running     0          157m
nginx-deployment-5754944d6c-kkg5t   1/1     Running     0          156m
pi-wbxwp                            0/1     Completed   0          30m
[root@k8s-master01 ~]# kubectl log pi-wbxwp