CronJob YAML

A CronJob's spec has a schedule and a jobTemplate; the jobTemplate is identical to a Job's spec (that's why three nested specs appear):

apiVersion: batch/v1
kind: CronJob
metadata:
  name: gece-yedek
spec:
  schedule: "0 3 * * *"
  jobTemplate:
    spec:
      template:
        spec:
          restartPolicy: OnFailure
          containers:
            - name: yedek
              image: postgres:16
              command: ["sh", "-c", "pg_dump -h db -U app app > /yedek/app.sql"]

Three important settings:

• concurrencyPolicy: Allow (default), Forbid (skip if it overlaps the previous one), Replace (stop the previous one, start the new one).
• startingDeadlineSeconds: a missed run can still be started within this time.
• successfulJobsHistoryLimit / failedJobsHistoryLimit: the number of old Jobs kept (default 3 / 1).

spec:
  schedule: "0 3 * * *"
  timeZone: "Europe/Istanbul"
  concurrencyPolicy: Forbid
  successfulJobsHistoryLimit: 3
  failedJobsHistoryLimit: 5