Pods are not the only way to run workloads in Kubernetes. You can also use jobs to execute something once, or you can use cron jobs to execute workloads on a schedule. This lab provides an opportunity to learn about cron jobs by implementing a simple scheduled job in a working Kubernetes cluster.
Learning Objectives
Successfully complete this lab by achieving the following learning objectives:
- Create the cron job in the cluster
Create a descriptor for the cron job with
vi ~/cleanup-cronjob.yml.apiVersion: batch/v1beta1 kind: CronJob metadata: name: cleanup-cronjob spec: schedule: "*/1 * * * *" jobTemplate: spec: template: spec: containers: - name: data-cleanup image: linuxacademycontent/data-cleanup:1 restartPolicy: OnFailureCreate the cron job in the cluster.
kubectl apply -f ~/cleanup-cronjob.yml- Allow the cron job to run successfully
Give the cron job a minute or so to run once, and then check the status.
kubectl get cronjob cleanup-cronjobYou should see a timestamp under
LAST-SCHEDULE, indicating the job was executed.
