Direct cgroup stats collection

[linxiulei]

Enhancement Description

• One-line enhancement description (can be used as a release note): Allow kubelet to collect system cgroups' stats without relying on cAdvisor for better performance.
• Kubernetes Enhancement Proposal: KEP-4786: Direct cgroup stats collection on Node #4787
• Discussion Link: Avoiding starting Cadvisor kubernetes#126120 (comment)
• Primary contact (assignee): @linxiulei
• Responsible SIGs: sig/node
• Enhancement target (which target equals to which milestone):
  • Alpha release target (x.y): 1.32
  • Beta release target (x.y):
  • Stable release target (x.y):
• Alpha
  • KEP (k/enhancements) update PR(s):
  • Code (k/k) update PR(s):
  • Docs (k/website) update PR(s):

Please keep this description up to date. This will help the Enhancement Team to track the evolution of the enhancement efficiently.

[linxiulei]

/sig node
/cc @haircommander @kannon92 @SergeyKanzhelev @dchen1107