Skip to main content

Kubernetes cronjob

Linux cronjobs are useful to run script or commands at a particular time or scheduled intervals. You can refer crontab.guru for verifying the syntax. Similarly, kubernetes give the ability to run the pods at the scheduled intervals.

apiVersion: batch/v1beta1
kind: CronJob
spec:
  schedule: "*/10 * * * *"
  jobTemplate:
    spec:
      template:
        spec:
          containers:
            - name: pandas
              image: python3

How it works?​

  • Once the cronjob is created using the above yaml statements, kubernetes create component with kind: CronJob. Based on the cron schedule like every 10 mins as par the above example, following steps happen.
    • a new job will be created
    • respect pod kicks in and starts performing the task
    • Once the task is completed, pod goes into completed state.
    • if the task is failed, pod will restart based on restartPolicy setting.