Mastering Kubernetes - Second Edition

Scheduling cron jobs

Kubernetes cron jobs are jobs that run for a specified time, once or repeatedly. They behave as regular Unix cron jobs, specified in the /etc/crontab file.

In Kubernetes 1.4 they were known as a ScheduledJob. But, in Kubernetes 1.5, the name was changed to CronJob. Starting with Kubernetes 1.8, the CronJob resource is enabled by default in the API server and there no need to pass a --runtime-config flag anymore, but it's still in beta. Here is the configuration to launch a cron job every minute to remind you to stretch. In the schedule, you may replace the * with ?:

apiVersion: batch/v1beta1kind: CronJobmetadata:  name: stretchspec:  schedule: "*/1 * * * *"  jobTemplate:    spec:      template:        metadata:          labels:            name: stretch