Job

Not much to explain here. A transient pod executes a task in the cluster until the task is finished or completed. Is possible to schedule a job using CronJob.

The following yaml creates a job to add 3 + 2.

apiVersion: batch/v1
kind: Job
metadata:
  name: math-add-job
spec:
  template:
    spec:
      containers:
        - name: math-add
          image: ubuntu
          commad: ["expr", "3", "+", "2"]
          
      restartPolicy: Never

Is possible to specify how many successful completions requires the job and if they run in parallel. For example, kubernetes will schedule 3 runs of the following job in parallel, and will recreate the job until there are 3 successful completions if one of the previous runs fail.

apiVersion: batch/v1
kind: Job
metadata:
  name: math-add-job
spec:
  completions: 3
  parallelism: 3
  template:
    ...