Argo Rollouts extensions

[spaghettifunk]

Hey folks 👋 I love Argo Rollouts and I cannot thank you enough for this amazing project!
I have been working with Knative Serving for a while and I've been trying to figure out how I could combine Argo Rollouts and Knative together so that I could take advantage of all the goodies that Argo Rollouts has to offer and, at the same time, the simplicity of deploying applications with Knative Serving. I am aware of the discussion that happened here and I totally understand the issue and the developer experience that is at the base.
This made me thinking: what if Argo Rollouts would have extensions like Argo CD? Would it be possible for Argo Rollout to control CRDs as well? How can Argo Rollouts "control" a generic CRD without knowing in advance what it is?

Where I am trying to get is basically the possibility to make available a set of interfaces that could be implemented by the external party that has the knowledge of the CRD. From Argo Rollouts perspective, the Rollout specification will have a reference to the code where the interfaces are implemented (like in ArgoCD) and the workloadRef would point to the CRD specification.
The Controller would now call the interfaces to execute the Rollout strategy. Analysis and Experiments shouldn't be touched by the external party since they are independent from the strategy itself.

Does it make sense? 🙈

[kostis-codefresh]

@spaghettifunk Argo Rollouts has just released plugins in 1.5 https://argoproj.github.io/argo-rollouts/plugins/ (both for traffic providers and analysis providers)

Where I am trying to get is basically the possibility to make available a set of interfaces that could be implemented by the external party that has the knowledge of the CRD

There is already a plugin for the Kubernetes Gateway API

https://github.com/argoproj-labs/rollouts-plugin-trafficrouter-gatewayapi

[spaghettifunk]

Hi @kostis-codefresh! This is awesome 🤩 I think now it would be possible to extend and use services like KNative with Argo Rollouts instead of their native way of doing traffic shifting! Thanks :)

[salaboy]

Yeah.. I think that by supporting the Gateway API we can integrate much easily with Knative, as there are efforts to support the Gateway API there too.