Kubernetes - delete all jobs in bulk

Question

I can delete all jobs inside a custer running

kubectl delete jobs --all 

However, jobs are deleted one after another which is pretty slow (for ~200 jobs I had the time to write this question and it was not even done).

Is there a faster approach ?

Answer 1

It's a little easier to setup an alias for this bash command:

kubectl delete jobs `kubectl get jobs -o custom-columns=:.metadata.name`

Answer 2

I have a script for deleting which was quite faster in deleting:

$ cat deljobs.sh 
set -x

for j in $(kubectl get jobs -o custom-columns=:.metadata.name)
do
    kubectl delete jobs $j &
done

And for creating 200 jobs used following script with the command for i in {1..200}; do ./jobs.sh; done

$ cat jobs.sh 
kubectl run memhog-$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1)  --restart=OnFailure --record --image=derekwaynecarr/memhog --command -- memhog -r100 20m

Answer 3

If you are using CronJob and those are piling up quickly, you can let kubernetes delete them automatically by configuring job history limit described in documentation. That is valid starting from version 1.6.

...
  spec:
    ...
    successfulJobsHistoryLimit: 3
    failedJobsHistoryLimit: 3