Validate config apiVersion and kind

[kke]

Signed-off-by: Kimmo Lehto klehto@mirantis.com

Fixes #1237

Errors out if configuration header apiVersion and kind fields do not have the expected values k0s.k0sproject.io/v1beta1 and ClusterConfig.

[jnummelin]

Smoke test for CRD based config changes appears to be broken in some way, does not seem to pass even with few restarts

[mikhail-sakhnov]

looks like actions are stuck? might be rebasing over main will help, we once already had that behavior.

[kke]

I'm not sure why the config change smoke is failing. Is it building a config that does not have the fields?

[mikhail-sakhnov]

The controller0 logs have ```
time="2021-11-26 08:14:11" level=error msg="cluster-config reconcile failed: failed to validate config: [expected apiVersion: k0s.k0sproject.io/v1beta1 but found expected kind: ClusterConfig but found ]" component=clusterConfig-reconciler

so looks like it generates wrong config

[kke]

Hmm, in pkg/component/controller/clusterConfig.go there was:

resourceType = v1.TypeMeta{APIVersion: "k0s.k0sproject.io/v1beta1", Kind: "clusterconfigs"}

I wonder if that was intentional. I also wonder what happens if that changes when upgrading.

[kke]

The client-gen thing does have some plural override flag but I'm not sure if it should be used.

[kke]

Maybe there should be different config kind for the crd without the node level stuff.