Feature: Support Overriding CNI

[blakeromano]

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Problem Statement

I want to be able to use idpbuilder with a CNI of my choice. For example I should be able to override to avoid using the default CNI and use something like cilium https://docs.cilium.io/en/stable/installation/kind/

Possible Solution

We should add a cli argument to idpbuilder that is --cni and if set to something like cilium we should update KIND Config we generate to have:

networking:
  disableDefaultCNI: true

And we should also orchestrate for the CNI to be created (if we don't do this the other pods won't come up, like gitea, etc;)

Alternatives Considered

I mean we could have a generic hook instead to install things outside of the ArgoCD model but I think that is a worse way to do this because ideally we should have very few exceptions to managing things outside of ArgoCD

[nabuskey]

This would require:

• Embed cilium manifests.
• Load images at run time. Pull if necessary.
• Install.

I agree that CNI is an unique use case because it involves special configuration at bootstrap time and effectively required for other pods to work. Something idpbuilder should support imo.

[blakeromano]

I do get concerned about bloatedness of the idpbuilder cli.

I almost wonder if we could make it so there is a special CNOE annotation to apply a package first outside of argocd first, then let Argo take control after initial deployment