feat: allow customizable [Mutating|Validating]WebhookConfiguration names

[davidxia]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Which issue(s) this PR fixes:

closes #2750

Special notes for your reviewer:

Does this PR introduce a user-facing change?

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[davidxia]

@denkensk @mimowo are you open to this small feature? If so, how does this implementation look?

[mimowo]

I'm not sure, let me ask some questions to better understand the feature and your use case.

Do you want to replace the built-in webhooks with custom ones?

Which part is really important for you - disabling the built-in ones, or the ability to register extra ones?

If so, what is the issue with the built-in ones, can we extend them?

cc @tenzen-y

[davidxia]

Do you want to replace the built-in webhooks with custom ones?

No, I just want to be able to specify a custom name for the Validating and MutatingWebhookConfigurations.

[mimowo]

No, I just want to be able to specify a custom name for the Validating and MutatingWebhookConfigurations.

Ok, but then why?

Just a side note that the names are hard-coded in the helm charts see here.

[davidxia]

Ok, but then why?

I'm deploying the helm charts with ArgoCD to multiple K8s clusters. ArgoCD itself runs on one K8s cluster. Each helm chart deployment is created by an ArgoCD Application K8s custom resource. These Applications need to have unique names. So I prefix them with the target K8s cluster name as a prefix. e.g. cluster1-kueue, cluster2-kueue.

Without being able to customize the webhook name, I get K8s resource name mismatches because of this cluster prefix.

[davidxia]

Just a side note that the names are hard-coded in the helm charts see here.

ArgoCD is able to update the Helm chart names somehow. So I see all the K8s resource names are prefixed as I expect. It's just the hard-coded names in Golang that aren't matching.

[mimowo]

Thanks for explaining. I need some time to digest, as I'm not quite familiar with helm charts yet.

In the meanwhile let's see if @tenzen-y or @mwielgus has some thoughts on this

[tenzen-y]

Maybe I couldn't understand your use cases property.
Are there any reasons why you do not prefer using the ApplicationSet instead of the Application to deploy ArgoCD Applications to the multiplier clusters?

[davidxia]

Maybe I couldn't understand your use cases property. Are there any reasons why you do not prefer using the ApplicationSet instead of the Application to deploy ArgoCD Applications to the multiplier clusters?

We are locked into a legacy system that uses Applications. Does ApplicationSet support what we need?

[davidxia]

just bumping this PR to see if you'd be open to this change?

[davidxia]

bumping again