Kubernetes CronJobs

CronJobs (previously ScheduledJobs) has been a beta feature since Kubernetes 1.8! With 1.21 we get to finally see this widely used API graduate to stable.

CronJobs are meant for performing regular scheduled actions such as backups, report generation, and so on. Each of those tasks should be configured to recur indefinitely (for example: once a day / week / month); you can define the point in time within that interval when the job should start.

https://kubernetes.io/docs/concepts/workloads/controllers/cron-jobs/

apiVersion: batch/v1
kind: CronJob
metadata:
  name: hello
spec:
  schedule: "*/1 * * * *"
  jobTemplate:
    spec:
      template:
        spec:
          containers:
          - name: hello
            image: busybox
            imagePullPolicy: IfNotPresent
            command:
            - /bin/sh
            - -c
            - date; echo Hello from the Kubernetes cluster
          restartPolicy: OnFailure

Related

• kind: Job, kubectl get jobs
• kind: CronJob, kubectl get cronjob
• Jobs (Kubernetes)
• Kubernetes scheduling

See also

• CronJobs (Kubernetes), Understand Jobs and CronJobs, kind: Job, job-controller
• Kubernetes Workloads: Deployment, ReplicaSet, StatefulSet, DaemonSets, Job, CronJob, .apps/
• cron, crontab, systemctl list-timers, anacron, Kubernetes scheduler, Systemd services, CronJobsStack, cron.schedule, crontab -l, 0x004b, at, /etc/cron.deny, /etc/cron.allow, /etc/crontab, /var/spool/cron/crontabs/