Create a CronJob in Kubernetes with nginx:latest (Scheduled Task)

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Ques:-

DevOps team is setting up recurring tasks on different schedules. Currently, they're developing scripts to be executed periodically. To kickstart the process, they're creating cron jobs in the Kubernetes cluster with placeholder commands. Follow the instructions below:

Create a cronjob named devops.

Set Its schedule to something like */6 * * * *. You can set any schedule for now.

Name the container cron-devops.

Utilize the nginx image with latest tag (specify as nginx:latest).

Execute the dummy command echo Welcome to Learning!.

Ensure the restart policy is OnFailure.


Ans:-

raj@jumphost ~$ vi job.ymal

raj@jumphost ~$ cat job.ymal 

apiVersion: batch/v1

kind: CronJob

metadata:

  name: devops

spec:

  schedule: "*/6 * * * *"

  jobTemplate:

    spec:

      template:

        spec:

          containers:

          - name: cron-devops

            image: nginx:latest

            command: ["echo", "Welcome to Learning!"]

          restartPolicy: OnFailure

raj@jumphost ~$ ls

job.ymal

raj@jumphost ~$ kubectl apply -f job.ymal 

cronjob.batch/devops created

raj@jumphost ~$ kubectl get job

No resources found in default namespace.

raj@jumphost ~$ kubectl get cronjob

NAME     SCHEDULE      SUSPEND   ACTIVE   LAST SCHEDULE   AGE

devops   */6 * * * *   False     0        <none>          31s

raj@jumphost ~$ kubectl get pod

No resources found in default namespace.

raj@jumphost ~$ 

This will:

• Create a CronJob named devops
• Run every 6 minutes (*/6 * * * *)
• Use the nginx:latest image
• Execute the dummy command echo Welcome to Learning!
• Restart the job only on failure