GitOps for managementCluster

[pacopeng]

This PR is for Task: https://github.com/redhat-cop/declarative-openshift/issues/48

1. Create a folder to store management Cluster yaml files
2. Create .bootstrap folder to store GitOps bootstrap yaml files

[pacopeng]

Please help to review . Thanks.

[pacopeng]

@senthilredhat adjust the bootstrap with helm charts.

[pacopeng]

I close this. PR , cause PR 46 already include all the commit.

[oybed]

re-opening - let's review this one first

[oybed]

@pacopeng I'm currently OOO, but will review this early next week.

[oybed]

Overall good work to get to this point!

Below is my feedback. We can discuss when we meet next:

• The app-of-app is an outdated approach and we should move to use ApplicationSet instead.
• With the use of an ApplicationSet, we should also consider removing the kustomize approach as the ApplicationSet can do the same (+ more), and I'd argue in a more elegant way.
• IMHO we should eliminate the manual steps (i.e.: option 2) in the README as that was mostly just a way to get us started. With the introduction of GitOps, we should just use that approach.
• An ultimate goal should be for someone to just clone this repo and use it as-is for starter (e.g.: a demo/PoC, etc.) ... it may be hard to do 100% re: OCM token, etc., but we should at least default the values that can be, i.e.: this git repo, main branch, etc.

Nitpicks:

• Please stay consistent between camelCase v.s. under_score approach

[pacopeng]

@oybed @senthilredhat

1. Change app of apps to applicationSet
2. Refine README
3. Disable rosa cluster creation for now (it require prerequisite come from crossplane,once this PR merged we can add the integration of crossplane for prerequisites)