K8s-Job.md

LAB: K8s Job

This scenario shows how K8s job object works on minikube

Steps

• Copy and save (below) as file on your PC (job.yaml).
• File: https://github.com/omerbsezer/Fast-Kubernetes/blob/main/labs/job/job.yaml

apiVersion: batch/v1
kind: Job
metadata:
  name: pi
spec:
  parallelism: 2               # each step how many pods start in parallel at a time
  completions: 10              # number of pods that run and complete job at the end of the time
  backoffLimit: 5              # to tolerate fail number of job, after 5 times of failure, not try to continue job, fail the job
  activeDeadlineSeconds: 100   # if this job is not completed in 100 seconds, fail the job
  template:
    spec:
      containers:
      - name: pi
        image: perl           # image is perl from docker   
        command: ["perl",  "-Mbignum=bpi", "-wle", "print bpi(2000)"]    # it calculates the first 2000 digits of pi number
      restartPolicy: Never   

• Create job:

• Watch pods' status:

• Watch job's status:

• After pods' completion, we can see the logs of each pods. Pods are not deleted after the completion of task on each pod.

• Delete job: