Use CEL + Swagger x-ms-mutability to prevent changes to write-once properties

[Porges]

Some ARM templates have properties that can be set on creation but not modified later. What do we do about these? Does Kubernetes have support/concepts that match this?

[matthchr]

I noticed that Crossplane has an annotation +immutable, and Kubernetes seems to discuss this exact annotation here

[bergerx]

New place for the kep is here: https://github.com/kubernetes/enhancements/tree/master/keps/sig-api-machinery/1101-immutable-fields#suggested-marker-syntax

[matthchr]

Still something we should consider

[matthchr]

Still tracking this but as far as I can tell no movement upstream, so we'll sit on this some more. It's not an issue in practice for us right now.

[matthchr]

No status change from August when we visited this issue last.

[theunrepentantgeek]

No change. Still something we need to sort.

[matthchr]

No change from above. Looks like the KEP is stalled.

[matthchr]

See https://kubernetes.io/blog/2022/09/23/crd-validation-rules-beta/ and https://github.com/google/cel-spec

[matthchr]

still interesting

[matthchr]

This is still interesting but not really that critical (which is why it keeps lingering in this list).

[theunrepentantgeek]

Still of interest.