Support CRD Validation Expression Language (CEL)

[brainwang]

Is your enhancement related to a problem? Please describe

No.

Describe the solution you'd like

Support CRD Validation Expression Language (CEL), which was introduced in https://github.com/kubernetes/enhancements/blob/master/keps/sig-api-machinery/2876-crd-validation-expression-language/README.md

Describe alternatives you've considered

No response

Additional context

No response

[rohanKanojia]

Umm, we already seem to have this in our model:

kubernetes-client/kubernetes-model-generator/kubernetes-model-apiextensions/src/generated/java/io/fabric8/kubernetes/api/model/apiextensions/v1/JSONSchemaProps.java

Lines 198 to 199 in d6e6cc3

	@JsonProperty("x-kubernetes-validations")
	@JsonInclude(JsonInclude.Include.NON_EMPTY)

Have you tried this on Kubernetes 1.25.0 cluster?

[derlin]

How can you add this annotation in generated CRDs using CRDGenerator ?

[rohanKanojia]

I'm not sure we have support for this in java or crd generator. @andreaTP @metacosm Do you have some idea about this?

[manusa]

Relates to #4348

[andreaTP]

There is a cel implementation for Java:
https://github.com/projectnessie/cel-java

it would be interesting to receive proposals on how this can play with the current API in the different cases(crd-generator, java-generator, CR validations on the client side).

[stale]

This issue has been automatically marked as stale because it has not had any activity since 90 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions!