Only create per-object webhooks for configured types

[adrianludwin]

We currently create one almighty "object" webhook that, if broken, can effectively block every object operation in the entire cluster (minus critical system namespaces), even for objects that are not being monitored by HNC.

We should modify the HNCConfiguration reconciler to dynamically generate webhooks only for the objects types that are being propagated by HNC. Note that we need to insert new webhooks into the existing webhook config, since HNC's copy of cert-controller mentions the HNC webhook config by name, so creating a whole new webhook config won't work. But that should be pretty easy.

I'm guessing the best place to do this is to build a function similar to [syncObjectReconcilers](https://github.com/kubernetes-sigs/hierarchical-namespaces/blob/281b24ff4c6d9fbbed59f6ac473b9c3cad79450f/internal/hncconfig/reconciler.go#L268), maybe called syncObjectWebhookConfigs or something like that.

I don't think this is a requirement for v1.0 but it would be nice if you felt like getting it in.

/assign @erikgb
/cc @rjbez17

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/lifecycle stale

[olfway]

/remove-lifecycle stale

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/lifecycle stale

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/lifecycle rotten

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/close not-planned

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

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[erikgb]

/reopen

[k8s-ci-robot]

@erikgb: Reopened this issue.

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/reopen

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[erikgb]

/remove-lifecycle rotten

[adrianludwin]

Thanks for working on this :)

…

On Sun, May 28, 2023 at 9:11 AM Erik Godding Boye ***@***.***> wrote: /remove-lifecycle rotten — Reply to this email directly, view it on GitHub <#152 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AE43PZF4FDE4MI6XP5Y4GMDXINFIFANCNFSM5P7EQRIQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[mzain]

Hey Folks,
Checking if this is still being worked on?

[adrianludwin]

Sorry, been very busy but looking at that PR now

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/lifecycle stale

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/lifecycle rotten

[omaratdgtl]

Hey Folks,
Checking if this is still being worked on?

[rjbez17]

Hey @omaratdgtl There are only a few things left in the PR to clean up and then we can get it merged. Unfortunately those working on the PR are quite busy. If you wanted to take over the PR here #285 and clean up the last few items we can get it reviewed and merged!

[k8s-triage-robot]

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/close not-planned

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

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The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

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/close not-planned

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