Cronjob

A CronJob does not run your work; it creates a Job, and the Job creates a pod. When the pod finishes, neither the Job nor the pod disappears. The pod is kept on purpose so you can still read its logs after the fact, and the Job is kept so you can still read its status. ...

A CronJob is a Job template plus a cron expression. Every time the expression matches, the controller creates a new Job, and that Job runs a pod to completion. Nothing stays resident between runs: a batch job inherits the cluster’s retry and scheduling machinery without a daemon kept alive to trigger it. ...