Support memory qos with cgroups v2

[xiaoxubeii]

Enhancement Description

• One-line enhancement description (can be used as a release note): Support memory qos with cgroups v2
• Kubernetes Enhancement Proposal: https://github.com/kubernetes/enhancements/tree/master/keps/sig-node/2570-memory-qos
• Discussion Link: https://docs.google.com/document/d/1r9Fx2omdMLP8SJ59np-C6uBqeuS4TSbQc5ChmQWMYJ8/edit?usp=sharing
• Primary contact (assignee): @xiaoxubeii @QiWang19 @sohankunkerkar
• Responsible SIGs: node
• Enhancement target (which target equals to which milestone):
  • Alpha1 release target (x.y): v1.22
  • Alpha2 release target (x.y): v1.27
  • Alpha3 release target (x.y): v1.36
  • Beta release target (x.y): blocked for https://docs.google.com/document/d/1mY0MTT34P-Eyv5G1t_Pqs4OWyIH-cg9caRKWmqYlSbI/edit?usp=sharing
  • Stable release target (x.y):
• Alpha1
  • KEP (k/enhancements) update PR(s):
    • KEP-2570: Support memory qos with cgroups v2 #2571
  • Code (k/k) update PR(s):
    • Feature: add unified on CRI to support cgroup v2 kubernetes#102578
    • Feature: Support memory qos with cgroups v2 kubernetes#102970
  • Docs (k/website) update PR(s):
    • Support Memory QoS with cgroups v2 for 1.22 #2570 website#28566
• Alpha2
  • KEP (k/enhancements) update PR(s):
    • KEP-2570: Memory QOS Alpha and Production Readiness #3818
  • Code (k/k) update PR(s):
    • default memoryThrottlingFactor to 0.9 and optimize the memory.high formulas kubernetes#115371
  • Docs (k/website) update PR(s):
    • Memory QOS Alpha2 KEP 2570 blog post website#39853
    • [zh] Sync blog 2023-05-05-memory-qos-cgroups-v2 website#43183
• Alpha3
  • KEP (k/enhancements) update PR(s):
    • KEP-2570: Mitigate MemoryQoS memory.high livelock concern in v1.36 #5879
  • Code (k/k) update PR(s):
    • KEP-2570: Add MemoryReservationPolicy to kubeketconfig for MemoryQoS feature kubernetes#137584
    • KEP-2570: setMemoryQoS clears memory.min when requests 0 kubernetes#137637
    • KEP-2570: Add tiered memory protection, metrics, rollback fix, and E2E tests for MemoryQoS kubernetes#137719
    • Remove reconcilePodMemoryProtection that resets pod cgroup values on systemd kubernetes#137889
  • Docs (k/website) update PR(s):
    • blog post v1.36: Cgroup V2 MemoryQoS Alpha v3  website#54577
    • KEP-2570: Add documentation for MemoryQoS with cgroups v2 for 1.36 website#54417

[xiaoxubeii]

/sig node

[xiaoxubeii]

/assign @xiaoxubeii

[MadhavJivrajani]

Hi! This sounds really interesting and I'd love to help out, please let me know how I can help out with this!

[ehashman]

/stage alpha
/milestone v1.22

[gracenng]

Hi @xiaoxubeii 👋 1.22 Enhancements Shadow here.

This enhancement is in good shape, some minor change requests in light of Enhancement Freeze on Thursday May 13th:

• Update kep.yaml file to the latest template
• In kep.yaml, status is currently provisional instead of implementable
• Alpha graduation criteria missing
• KEP not merged to master

Thanks!

[gracenng]

Hi @xiaoxubeii 👋 1.22 Enhancements shadow here.

To help SIG's be aware of their workload, I just wanted to check to see if SIG-Node will need to do anything for this enhancement and if so, are they OK with it?
Thanks!

[xiaoxubeii]

@gracenng Hey grace, I have updated necessary contents as follows:

• update kep.yaml for prr approval
• add Alpha graduation criteria

sig-node approvers @derekwaynecarr @mrunalp are reviewing for that. I am waiting for lgtm/approve and merge as implementable.