Deleting deployment does not delete pods associated with it

[tobegit3hub]

We have the same issue with kubernetes/kubernetes#32985 .

It may be the bug of pykube and we have tested for serval times. If we delete the deployment, kubectl get deployment can not find that deployment, but kubectl get rs shows that the pods are not deleted.

If we use kubectl to delete the deployment, everything works well and the pods will switch to Terminating and deleted forever.

We have used pykube to implement the PaaS service and this is critical for us. Hope anyone can help to confirm and fix this 😃

[tobegit3hub]

Deleting the Job seems not to delete the Pod neither.

May be relate to kubernetes/kubernetes#20497 . But if I try kubectl delete $job and the pods will be cleaned up.

[brosner]

This is the current expected behavior. I can't recall where I've discussed this before. I couldn't find another issue so it must have been on Slack.

The delete method on each object is the equivelent of deleting the object through the HTTP API. kubectl implements additional logic to cascade deletions to dependent objects.

This functionality is something I'd like to see in pykube and even the default behavior, but it is a feature enhancement as opposed to a bug in the current code.

[tobegit3hub]

Thanks for @brosner and it makes sense to me.

Does pykube have plan to implement the additional logic to delete all the resources? Or just wait for kubernetes team to provide the full-function APIs for that? I'm not sure if they will do that. It would be great if we can implement the feature by ourselves.

[ecthiender]

One workaround is, you can scale a deployment to 0, and then delete the deployment. Scaling it to 0 deletes the associated pods.

[Dmitry1987]

I'm using this

kubectl patch deployment some-name-integration --namespace production -p '{"spec":{"replicas":0}}'

before deleting deployment, and it works well :)

[nfons]

+1 to this. this seems a bit "odd" so to speak, because most users are familiar with kubectl, and would expect "delete" to delete pods as well

[ZongqiangZhang]

+1

[nielsole]

Let's hope this logic will be moved to the server side in the future: kubernetes/kubernetes#12143 (issue is kind of stale)

[jparklab]

We can use deletion policy to tell server to delete dependent resources.

#105 (comment)