how to upgrade smoothly from v1alpha1 to v1alpha2?

[u2takey]

After I upgrade crd of tfjob from v1alpha1 to v1alpha2, all tfjobs of v1alpha1 lost. Is there a way to upgrade smoothly from v1alpha1 to v1alpha2 without affecting old user's experience? ( In kubernetes, they have internal and external version of resources for that ? )

[gaocegege]

Hi @u2takey

This is a good question. When we designed the v1alpha2, we consider it a breaking change. We will keep compatibility after v1alpha2. And I will check if there is any way to keep TFJobs.

[jlewi]

I think this is a K8s issue to the extent Kubernetes doesn't allow us to have multiple versions of a CRD simultaneously. I believe this is fixed in 1.11.

kubernetes/enhancements#544

I think we can close this issue.

On K8s versions of 1.11 and later we can simultaneously support multiple versions of a CRD. I don't think its worth it to try to improve the experience on older versions of K8s.