Support +enum tags in k8s APIs

[alculquicondor]

What do you want to happen?

Kubernetes APIs include an enum tag such as this one:

https://github.com/kubernetes/kubernetes/blob/be4b7176dc131ea842cab6882cd4a06dbfeed12a/staging/src/k8s.io/api/core/v1/types.go#L3506-L3507

which translates to the following OpenAPIv3:

          "effect": {
            "description": "Required. The effect of the taint on pods that do not tolerate the taint. Valid effects are NoSchedule, PreferNoSc>
            "type": "string",
            "default": "",
            "enum": [
              "NoExecute",
              "NoSchedule",
              "PreferNoSchedule"
            ]

However, kubebuilder doesn't recognize them when using these types in another project.

Example in Kueue, for the code in https://github.com/kubernetes-sigs/kueue/blob/34bfbe0f359b8439b737f07c3f3e5da92c7d0d67/apis/kueue/v1beta1/resourceflavor_types.go#L68
The rendered CRD lacks the enum information:
https://github.com/kubernetes-sigs/kueue/blob/34bfbe0f359b8439b737f07c3f3e5da92c7d0d67/config/components/crd/bases/kueue.x-k8s.io_resourceflavors.yaml#L87-L89

Extra Labels

No response

[camilamacedo86]

HI @alculquicondor

This one should be raised against controller-tools. See: https://github.com/kubernetes-sigs/controller-tools

Can you please transfer this issue to their repo?

Thank you for your attention and time.

[tenzen-y]

I transferred this issue to kubernetes-sigs/controller-tools#933 on behalf of the kueue maintainers.

[camilamacedo86]

HI @tenzen-y

The CRDs are generated by controller-tools not Kubebuilder.
I do not know who ware kueue maintainers
What is kueue

[tenzen-y]

HI @tenzen-y

The CRDs are generated by controller-tools not Kubebuilder. I do not know who ware kueue maintainers What is kueue

If you are confused, sorry for that. I just wanted to say that I transferred this issue instead of Aldo.