Switch to crun for cri-o

[kannon92]

What would you like to be added:
CRI-O upstream has switched to crun as default OCI runtime. K8s crio jobs are still using runc.

Why is this needed:

Match upstream CRI-O intent

[kannon92]

cc @haircommander

[SergeyKanzhelev]

small note - may need different settings on different versions

/sig node
/area test

[k8s-ci-robot]

@SergeyKanzhelev: The label(s) area/test cannot be applied, because the repository doesn't have them.

In response to this:

small note - may need different settings on different versions

/sig node
/area test

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[kannon92]

cc @kubernetes/sig-node-cri-o-test-maintainers
cc @bitoku

[saschagrunert]

Quoting @bitoku from a similar discussion in the beginning of September:

One concern about switching to crun (especially latest crun) is that containers/crun#1767 may break some CIs. At least kubernetes/kubernetes#132791 needs to be merged. kubernetes/enhancements#1287 (comment) may also need discussion.

Anyhow, I'm +1 on the overall proposal.

[bitoku]

+1
I think IPUPR is fine.
I checked with the feature owners in slack and they said it should be ok.
I also tested the latest runc, which has the new cpu conversion, in the canary, and it passed.

We just need to change here, I guess. https://github.com/kubernetes/test-infra/blob/master/jobs/e2e_node/crio/templates/base/20-crio.conf#L7

[saschagrunert]

We just need to change here, I guess. https://github.com/kubernetes/test-infra/blob/master/jobs/e2e_node/crio/templates/base/20-crio.conf#L7

And cleanup:

test-infra/jobs/e2e_node/crio/templates/generate

Line 36 in e249ad0

["crio_cgroupv2_userns"]="root env-canary userns crun-enabled"

test-infra/jobs/e2e_node/crio/templates/base/crun-enabled.yaml

Lines 1 to 7 in e249ad0

	---
	storage:
	files:
	- path: /etc/crio/crio.conf.d/99-crun.conf
	contents:
	local: 99-crun.conf
	mode: 0644

test-infra/jobs/e2e_node/crio/templates/base/99-crun.conf

Lines 1 to 2 in e249ad0

	[crio.runtime]
	default_runtime = "crun"