Rolling apply new resource group definition

[guilhem]

Feature Description

Problem Statement:

When applying a new version of a resources group (for update, new feature etc), I want to control how it will be applied.

Proposed Solution:

having an update strategy field in spec.
controller following it for all instances of a crd.

Alternatives Considered:

N/A

Additional Context:

This kind of subject is already really hard to deal with in current controller model.
If it's solved with kro, it would be a game changer for many controllers.

• Please vote on this issue by adding a 👍 reaction to the original issue
• If you are interested in working on this feature, please leave a comment

[barney-s]

We were considering this part of earlier incarnation of KRO in the google repos. Lots of options here:

• having a separate RGD for each breaking version. So that the teams can pick which one to roll out when
• follow deployment controller pattern. auto-create a per-version RGD clone that is then rolled out according to a policy.
• Rely on existsing tools like argocd to rollout change per namespace ..

Would like to understand the use-case as well as thoughts on building this in KRO vs using external tools to solve the problem.

[barney-s]

related #206