Tf-operator: Delete v1alpha1 controller and API

[richardsliu]

V1beta1 is done now, so we can start deprecating the V1alpha API and controller logic.

[johnugeorge]

Keeping v2alpha2 for now?

[richardsliu]

I would like to delete both if possible. Deleting v1alpha1 seems like a good start since we have already removed it from the kubeflow components.

Do you see value in keeping v1alpha2? The only reason I have is that people might still be using it. But switching to v1beta1 is fairly trivial (just need to update the API version).

[johnugeorge]

I have the same opinion.

[johnugeorge]

@jlewi Shall we delete v1alpha1 and v1alpha2 versions now? AS @richardsliu , It is trivial to switch version to v1beta1

[gaocegege]

I think we could keep v1alpha2 in 0.4, since maybe there are some users still using it. We can claim that we will deprecate it in the next release (1.0).

[richardsliu]

Talked to @jlewi. We will keep v1alpha2 until all our examples have been updated to v1beta1.

[richardsliu]

Another reason: Kubeflow ML Pipelines is also using v1alpha2, so we cannot deprecate it right now.