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Support and use cgroup v2 #2843

Closed
Tracked by #2760
markusboehme opened this issue Feb 28, 2023 · 2 comments · Fixed by #2875
Closed
Tracked by #2760

Support and use cgroup v2 #2843

markusboehme opened this issue Feb 28, 2023 · 2 comments · Fixed by #2875
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type/enhancement New feature or request

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What I'd like: I'd like Bottlerocket to use cgroup v2/the unified cgroup hierarchy. The general ecosystem is moving into this direction:

  • cgroup v2 has been considered stable for some time in the kernel already.
  • Kubernetes 1.25 declared support for cgroup v2 as GA with release 1.25.
  • systemd changed its default to cgroup v2.
  • Features such as Pressure Stall Information metrics from the kernel are available on a per-cgroup level with cgroup v2.

cgroup v2 support should be available for all variants of Bottlerocket per opt-in. Newly released variants should make cgroup v2 the default (with the chance to opt-out).

Any alternatives you've considered: I don't see any alternatives for the long term. cgroup v1 will receive less attention and testing as time goes by, and likely will be phased out of projects Bottlerocket relies on.
@markusboehme markusboehme added type/enhancement New feature or request status/needs-triage Pending triage or re-evaluation labels Feb 28, 2023
@markusboehme markusboehme self-assigned this Feb 28, 2023
@markusboehme markusboehme added status/in-progress This issue is currently being worked on and removed status/needs-triage Pending triage or re-evaluation labels Feb 28, 2023
This was referenced Feb 28, 2023
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@stevehipwell stevehipwell mentioned this issue Mar 6, 2023
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@markusboehme markusboehme mentioned this issue Mar 9, 2023
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@markusboehme
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Announced the upcoming change in the GitHub discussions: #2874

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Relevant PRs:

@markusboehme markusboehme removed the status/in-progress This issue is currently being worked on label Mar 10, 2023
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Default to cgroup v2 for dev and k8s-1.26 variants markusboehme/bottlerocket
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