apiVersion: batch/v1beta1
kind: CronJob
metadata:
  name: hello
spec:
  schedule: "*/1 * * * *"
  concurrencyPolicy: Forbid
  successfulJobsHistoryLimit: 3
  failedJobsHistoryLimit: 10
  jobTemplate:
    spec:
      template:
        spec:
          containers:
          - name: hello
            image: busybox
            imagePullPolicy: IfNotPresent
            args:
            - /bin/sh
            - -c
            - date; echo Hello from the Kubernetes cluster
          restartPolicy: OnFailure

[root@centos-7-52 ~]# kubectl apply -f /tmp/cronjob.yaml 
[root@centos-7-52 ~]# kubectl get cronjob -o wide #查看cronjob
NAME    SCHEDULE      SUSPEND   ACTIVE   LAST SCHEDULE   AGE     CONTAINERS   IMAGES    SELECTOR
hello   */1 * * * *   False     0        52s             6m36s   hello        busybox   <none>
[root@centos-7-52 ~]# kubectl get job -o wide | grep hello # 查看执行的job历史，Job名称中的数字为时间戳
hello-1607757060   1/1           1s         2m48s   hello        busybox   controller-uid=194350a4-21ca-4d01-b264-34a963e78ce7
hello-1607757120   1/1           1s         108s    hello        busybox   controller-uid=e30a318c-6c0f-4d1d-b200-3dfaffe083c5
hello-1607757180   1/1           1s         48s     hello        busybox   controller-uid=a00d02fc-8d7e-40b3-8e2a-25620ecab427
[root@centos-7-52 ~]# date -d @1607757180
Sat Dec 12 15:13:00 CST 2020