[argoconfig] ability to create namespaces

[eyenx]

Is your feature request related to a problem? Please describe.
There is no way to manage namespaces as of now.

Describe the solution you'd like
I thought about having argoconfig create namespaces according to the applications' destination.namespace

Describe alternatives you've considered
creating a standalone chart for namespace creation

Affected chart
infra-apps

Additional context
A.e. the application velero in infra-apps sets it's destination.namespace to infra-velero. Argoconfig could make sure the namespace is also created.

[hairmare]

Namespace autocreation is in Argo CD's scope and will be available with >1.7.8 (argoproj/argo-cd#3976)

We will need to configure it in syncPolicy which is already supported by the argoconfig library.

  syncPolicy:
    syncOptions:
    - CreateNamespace=true

I'm not sure if we can set some global default syncOptions to enable this everywhere if we decide to go down that route.

Given that we are considering to use namespaces as a security boundary i'm not all that sure if I'd not rather manage namespaces somewhere else (ie. together with rbac and other security things).

[eyenx]

How would we manage setting labels on namespaces then for being able of using rbac-manager correctly? Isn't this then ending up with having a own infra-apps/namespaces application?

[eyenx]

Also, how are we handling AppProject creation when bootstrapping a new cluster? Is this done manually?

[tongpu]

Also, how are we handling AppProject creation when bootstrapping a new cluster? Is this done manually?

Initial creation of the first AppProject might need to be manual (like deploying ArgoCD with the Helm chart) and then we can probably use the raw YAML approach we're using for *-apps.