How to automatically remove completed Kubernetes Jobs created by a CronJob?

You can now set history limits, or disable history altogether, so that failed or successful CronJobs are not kept around indefinitely. See my answer here. Documentation is here.

To set the history limits:

The .spec.successfulJobsHistoryLimit and .spec.failedJobsHistoryLimit fields are optional. These fields specify how many completed and failed jobs should be kept. By default, they are set to 3 and 1 respectively. Setting a limit to 0 corresponds to keeping none of the corresponding kind of jobs after they finish.

The config with 0 limits would look like:

apiVersion: batch/v1beta1kind: CronJobmetadata:  name: hellospec:  schedule: "*/1 * * * *"  successfulJobsHistoryLimit: 0  failedJobsHistoryLimit: 0  jobTemplate:    spec:      template:        spec:          containers:          - name: hello            image: busybox            args:            - /bin/sh            - -c            - date; echo Hello from the Kubernetes cluster          restartPolicy: OnFailure

This is possible from version 1.12 Alpha with ttlSecondsAfterFinished. An example from Clean Up Finished Jobs Automatically:

apiVersion: batch/v1kind: Jobmetadata:  name: pi-with-ttlspec:  ttlSecondsAfterFinished: 100  template:    spec:      containers:      - name: pi        image: perl        command: ["perl",  "-Mbignum=bpi", "-wle", "print bpi(2000)"]      restartPolicy: Never

I've found the below to work

To remove failed jobs:

kubectl delete job $(kubectl get jobs | awk '$3 ~ 0' | awk '{print $1}')

To remove completed jobs:

kubectl delete job $(kubectl get jobs | awk '$3 ~ 1' | awk '{print $1}')