Option to delete user and cluster used by context when deleteing it

[cardil]

For my use case, using -d is super annoying, as ~/.kube/config file are left with defunkt entries from previously created clusters.

I'd like to request an option to delete user and cluster used by context when deleting it.

[ahmetb]

Sadly kubectl doesn’t provide clean cmds to delete user and cluster entries. I have an issue open about this for a long while.

Since we don’t directly manipulate the kubeconfig file, it doesn’t seem currently doable. But we can get to it.

[acim]

This seems to be possible now:

https://kubernetes.io/docs/tasks/access-application-cluster/configure-access-multiple-clusters/

[zcahana]

Is there still interest in this from the project authors? (@ahmetb)
If so, I'm happy to work on adding it.

Also: how would you like to see this being supported?

1. A separate flag (e.g., -D or -dd)?
2. A companion flag to -d (e.g., -d -p, "p" is for purge)?
3. Change behavior of -d

And also: need to consider that the deleted context's cluster/user might still be referenced in other contexts that are still there. In such case, it would be safer to avoid deleting the cluster/user, but possibly provide a way to force the deletion (e.g., -ddd in line with option (1) above, or -d -p -f in line with option (2)).

I personally am more fond of -D and no force deletion of non-orphaned clusters/users, but I'm also good with -dd and -ddd.

[ahmetb]

Yeah, I think we can add -D which actually deletes associated orphaned entries. Changing the default behavior of -d is gonna make some folks upset for sure (given there are a lot of course material and content out there explaining people to set up clusters manually, and manually editing the kubeconfig file to make it work).

I recommend adding this feature only to the Go implementation for the sake of simplicity.

[zcahana]

@ahmetb please see #409 which adds this as a new -D flag (indeed, only for the Go implementation 😉).