Create a Kubernetes Job Template with Ubuntu and Dummy Command (sleep 5)

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Kubernetes Job

✅ Purpose

A Job is used to run a one-time task in Kubernetes. It ensures that a specified number of pods successfully complete the task.

📌 Use Cases

• Data migration scripts
• Database backups
• Batch processing
• Cleanup tasks
• Sending reports or notifications

🧠 Key Features

• Runs once until completion
• Can retry on failure (based on restartPolicy)
• Tracks completion status

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⏰ Kubernetes CronJob

✅ Purpose

A CronJob is used to run recurring tasks on a schedule, similar to Linux cron jobs.

📌 Use Cases

• Scheduled backups
• Periodic data sync
• Log rotation
• Health checks
• Sending daily/weekly reports

🧠 Key Features

• Uses cron syntax (*/5 * * * *) to define schedule
• Automatically creates Jobs at scheduled times
• Can control concurrency and history retention
  
  
  

Ques:-

DevOps team is crafting jobs in the Kubernetes cluster. While they're developing actual scripts/commands, they're currently setting up templates and testing jobs with dummy commands. Please create a job template as per details given below:

Create a job named countdown-datacenter.

The spec template should be named countdown-datacenter (under metadata), and the container should be named container-countdown-datacenter

Utilize image ubuntu with latest tag (ensure to specify as ubuntu:latest), and set the restart policy to Never.

Execute the command sleep 5 


Ans:-

raj@jumphost ~$ vi job.yaml

raj@jumphost ~$ cat job.yaml 

apiVersion: batch/v1

kind: Job

metadata:

  name: countdown-datacenter

spec:

  template:

    metadata:

      name: countdown-datacenter

    spec:

      containers:

      - name: container-countdown-datacenter

        image: ubuntu:latest

        command: ["sleep", "5"]

      restartPolicy: Never

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

job.batch/countdown-datacenter created

raj@jumphost ~$ kubectl get job

NAME                   COMPLETIONS   DURATION   AGE

countdown-datacenter   1/1           12s        45s

raj@jumphost ~$ kubectl get pod

NAME                         READY   STATUS      RESTARTS   AGE

countdown-datacenter-msl9k   0/1     Completed   0          57s

raj@jumphost ~$ 

This will:

• Create a job named countdown-datacenter
• Use the ubuntu:latest image
• Run the dummy command sleep 5
• Ensure the container is named container-countdown-datacenter
• Set the restart policy to Never