[KEP-5573]: follows up from review

[kannon92]

Address followups such as oom.group risk, calling out kubeadm as out of scope and renaming the top level folder to reflect the true name of the KEP.

[kannon92]

/assign @pacoxu @BenTheElder @dchen1107

[BenTheElder]

kubeadm already supports customizing kubelet config so I'm not sure if anything needs to be done here, updates to the preflight checks? docs?

kubeadm is a little bit weird because it's in-tree and used for release-blocking signal (similarly if the node_e2e or kube-up scripts didn't work we'd have a problem), I think calling out out-of-tree projects as out of scope is at least reasonable.

It's not super great to release k/k with the release binaries out of sync.

[BenTheElder]

The rest of the diff LGTM, not sure about this part.

[kannon92]

It's not super great to release k/k with the release binaries out of sync.

I don't follow what you mean here.

[kannon92]

kubeadm already supports customizing kubelet config so I'm not sure if anything needs to be done here, updates to the preflight checks? docs?

#5574 (comment)

[BenTheElder]

I don't follow what you mean here.

Saying "this kep won't wait for another core release binary to be ready" is a little different from "we're not going to block on out of tree projects updating", kubeadm is part of the core kubernetes release. We shouldn't release a broken state.

#5574 (comment)

I see ... commented

[pacoxu]

kubeadm is a little bit weird because it's in-tree and used for release-blocking signal (similarly if the node_e2e or kube-up scripts didn't work we'd have a problem), I think calling out out-of-tree projects as out of scope is at least reasonable.

That's true and we also have an issue to move it out which is not updated for a long time. #1424

https://github.com/kubernetes/system-validators/blob/a7fadf67da1228984480d7e8dd9c8ae39803a442/validators/cgroup_validator_linux.go#L117

		warns = append(warns, errors.New("cgroups v1 support is in maintenance mode, please migrate to cgroups v2"))

We have a warning message when cgroup v1 support went to maintenance mode.

After this change happened in kubelet, we will update it to an error IIUC. This will be tracked in kubernetes/system-validators#58.

[kannon92]

I took a stab at addressing this. I'm not entirely sure what the goal is for system-validators but I call that out as a goal for this KEP.

[SergeyKanzhelev]

/lgtm

[k8s-ci-robot]

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[pacoxu]

/lgtm
/assign @dchen1107 @mrunalp