Kubernetes Job Cleaner

DEPRECATED: this script is no longer needed with recent Kubernetes versions (1.12+) as long as you use ttlSecondsAfterFinished

Very simple script to delete all completed jobs after X seconds (default: one hour).

Kubernetes jobs are not cleaned up by default and completed pods are never deleted. Running jobs frequently (like every few minutes) quickly thrashes the Kubernetes API server with unnecessary pod resources. A significant slowdown of the API server can be observed with increasing number of completed jobs/pods hanging around. To mitigate this, This small kube-job-cleaner script runs as a CronJob every hour and cleans up completed jobs/pods.

See Zalando's Running Kubernetes in Production document for more information.

Building the Docker image:

$ make

Deploying:

$ kubectl apply -f deploy/

There are a few options:

--seconds

Number of seconds after job completion to remove the job (default: 1 hour)

--timeout-seconds

Kill all jobs after X seconds (default: never)

--dry-run

Do not actually remove any jobs, only print what would be done

--namespace

Only search for (and clean) jobs in a single namespace