Skip to content

Kubernetes Lab 8 - Cron Jobs

Problem

Your commander has a simple data process that is run periodically to check status. They would like to stop doing this manually in order to save time, so you have been asked to implement a cron job in the Kubernetes cluster to run this process.

  • Create a cron job called xwing-cronjob using the ibmcase/xwing-status:1.0 image.
  • Have the job run every second minute with the following cron expression: */2 * * * *.
  • Pass the argument /usr/sbin/xwing-status.sh to the container.

Verification

  • Run kubectl get cronjobs.batch and LAST-SCHEDULE to see last time it ran
  • From a bash shell, run the following to see the logs for all jobs:
jobs=( $(kubectl get jobs --no-headers -o custom-columns=":metadata.name") )
echo -e "Job \t\t\t\t Pod \t\t\t\t\tLog"
for job in "${jobs[@]}"
do
   pod=$(kubectl get pods -l job-name=$job --no-headers -o custom-columns=":metadata.name")
   echo -en "$job \t $pod \t"
   kubectl logs $pod
done