Kubernetes CronJobs

Kubernetes 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.

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

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.

Example

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/