KEP: Compatibility Versions

[Joe Betz]

All,

https://github.com/kubernetes/enhancements/pull/4395 is out for review. 

This KEP proposes introducing a 

compatibility version in Kubernetes components to enhance Kubernetes control-plane upgrades. See safer Kubernetes upgrades (https://docs.google.com/document/d/1MAANihiX5lUE-PYIaNIgkK9l7MH1btl7q-iq6K9DUWI) for additional background.

This KEP impacts all Kubernetes development. We are looking to get feedback as early in hopes of incorporating it for an Alpha implementation in 1.30.

Thanks!

Joe Betz