Support for Kubernetes 1.31

[sambhav]

Kubernetes 1.31 has an advanced caching layer https://kubernetes.io/blog/2024/08/15/consistent-read-from-cache-beta/

This requires certain features to be implemented by etcd, specifically https://etcd.io/docs/v3.5/dev-guide/interacting_v3/#watch-progress

Creating this issue to check whether kine is compatible with this feature or not.

[sambhav]

Is #268 enough? Has there been any test with kine around this?

[brandond]

It works as far as I know. I haven't tested with v1.31, but I did enable the FeatureGate on previous releases on Kubernetes (1.29 and 1.30 IIRC) and it worked fine.

Let me know if you run into any problems and we can reopen. Otherwise I consider it working.

[sambhav]

I am seeing the following -

E0821 11:28:55.647162       1 feature_support_checker.go:165] "Failed to parse etcd version" err="could not parse \"\" as version" version=""
I0821 11:28:55.647183       1 feature_support_checker.go:133] RequestWatchProgress feature is not supported by "https://kine.qa-system.svc.cluster.local:2379" endpoint

The above is with kine 0.11.12 and Kubernetes 1.31.0. The api-server we are using is from registry.k8s.io/kube-apiserver-amd64

[sambhav]

@brandond can we re-open this issue?

[brandond]

Oh, that's new. Previously releases of Kubernetes did not check the server version so we have always left it empty. I guess they added that as part of promoting the FeatureGate to on by default.