CronJob

• A CronJob adds the concept of schedule. Similar like CronJob in Linux
• Used for periodic execution of workloads that run completion

CronJob Manifest File

cronjob.yaml

apiVersion: batch/v1
kind: CronJob
metadata:
  name: echo-date-better
spec:
  schedule: "* * * * *"
  jobTemplate:
    spec:
      parallelism: 1
      completions: 1
      activeDeadlineSeconds: 100
      backoffLimit: 1
      template:
        metadata:
          labels:
            app: echo-date
        spec:
          containers:
            - name: echo
              image: cgr.dev/chainguard/busybox:latest
              command: ["date"]
              resources:
                limits:
                  memory: "50Mi"
                requests:
                  memory: "50Mi"
                  cpu: "250m"

After make the manifest file, we apply the manifest to create the cronjob

kubectl apply -f cronjob.yaml

Then check the job u've been created

# Get cronjobs
kubectl get cronjob

# Get know more deep
kubectl describe cronjob [JOB_NAME]

# Trigger Job Manually to check
kubectl create job --from=cronjob/[CRONJOB_NAME] manually-triggered

# See the jobs that been completed
kubectl get jobs