CronJobs
CronJobs are Jobs with schedules. Schedules are expressed in the same time format as the traditional Unix cron daemon. It's suited to the same periodic workloads such as scheduled tasks.
apiVersion: batch/v1beta1
kind: CronJob
metadata:
name: my-cron
spec:
schedule: "*/30 * * * *"
jobTemplate:
spec:
template:
containers:
- name:
image:
command:
- /something
restartPolicy: Never
Execution control
Some additional features allow more precise control over execution:
suspend
can be use to stop future executions.startingDeadlineSeconds
sets the amount of time to wait for a Job to start before considering this execution failed.concurrencyPolicy
sets the action to be taken when a new execution begins during an existing one:Allow
lets both run.Forbid
prevents the new execution.Replace
terminates the existing job and creates a new one.
- Up to
successfulJobHistoryLimit
objects are preserved to allow troubleshooting.
Implementation
The CronJob controller creates a Job object for each execution.