Now you have learned how to run one-off or batch tasks with jobs, it is simple to extend the concept in order to run scheduled jobs. In Kubernetes, a CronJob is a controller that creates new jobs from a template on a given schedule.

Let's begin with a simple example. The following example will launch a job every minute. This job will output the current date and time and then exit:

fun-with-cron.yaml
apiVersion: batch/v1beta1
kind: CronJob
metadata:
  name: fun-with-cron
spec:
  schedule: "* * * * *"
  jobTemplate:
    spec:
      template:
        metadata:
          labels:
            cronjob: fun-with-cron
        spec:
          restartPolicy: OnFailure
          containers:
          - name: how-soon-is-now
            image: alpine:3.6
            command: ["/bin/date"]

Push the CronJob to Kubernetes with kubectl:

$ kubectl apply -f fun-with-cron.yaml

After...