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From what I understand the Job object is supposed to reap pods after a certain amount of time. But on my GKE cluster (Kubernetes 1.1.8) it seems that "kubectl get pods -a" can list pods from days ago.
All were created using the Jobs API.
I did notice that after delete the job with kubectl delete jobs The pods were deleted too.
My main concern here is that I am going to run thousands and tens of thousands of pods on the cluster in batch jobs, and don't want to overload the internal backlog system.
972
Delete the job with kubectl (e.g. kubectl delete jobs/pi or kubectl delete -f ./job. yaml ). When you delete the job using kubectl , all the pods it created are deleted too.
You can delete them at once with kubectl delete jobs --all , if you want to delete all jobs in the current namespace (not just the ones created by "hello".)
FEATURE STATE: Kubernetes v1.23 [stable] TTL-after-finished controller provides a TTL (time to live) mechanism to limit the lifetime of resource objects that have finished execution.
If you create pods directly (not via a deployment), you can delete them directly, and they will stay deleted. Pods (that were created directly), deployments, and services can all be deleted independently of one another, order doesn't matter. If you want to delete them but not the namespace, delete them in any order.
It looks like starting with Kubernetes 1.6 (and the v2alpha1 api version), if you're using cronjobs to create the jobs (that, in turn, create your pods), you'll be able to limit how many old jobs are kept. Just add the following to your job spec:
successfulJobsHistoryLimit: X failedJobsHistoryLimit: Y Where X and Y are the limits of how many previously run jobs the system should keep around (it keeps jobs around indefinitely by default [at least on version 1.5.])
Edit 2018-09-29:
For newer K8S versions, updated links with documentation for this are here:
CronJob - Job History Limits
CronJob API Spec
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