KEP-4205: Split the two phases into two KEPs and update Alpha and Beta requirements

[roycaihw]

• One-line PR description: Split the two phases into two KEPs to allow them moving at different paces. This original KEP (4205) will keep tracking the implemented exposure of PSI metrics. See KEP-5394: PSI-based node conditions #5395 for more details. Also update Alpha and Beta requirements.

• Issue link: Support PSI based on cgroupv2 #4205

/sig node
/cc @haircommander @ndixita @tiraboschi

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In response to this:

• One-line PR description: Split the two phases into two KEPs to allow them moving at different paces. See KEP-5394: PSI-based node conditions #5395 for more details. Also update Alpha and Beta requirements. Make CPU PSI a Beta requirement

• Issue link: Support PSI based on cgroupv2 #4205

• Other comments: See [KEP-4205] Concerns on using CPU PSI pressure to taint nodes #5062. CPU PSI cannot be used the same way as memory / IO PSI due to CPU being a compressible resource.

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[lmktfy]

/retitle KEP-4205: Split the two phases into two KEPs and update Alpha and Beta requirements

[roycaihw]

@haircommander I've updated the two KEPs as suggested. PTAL

• Existing KEP continues to track the exposure of PSI metrics: Support PSI based on cgroupv2 #4205, KEP-4205: Split the two phases into two KEPs and update Alpha and Beta requirements #5409
• New KEP tracks the net new feature of PSI-based node conditions: PSI-based node conditions #5394, KEP-5394: PSI-based node conditions #5395

[haircommander]

one note but generally this LGTM

[kannon92]

PRR shadow:

• KEP-4205: Split the two phases into two KEPs and update Alpha and Beta requirements #5409 (comment)
• Can you update the runc dependency section? AFAIK this is no longer relevant and we have runc 1.2.0. Let's update the doc to reflect that.

[deads2k]

PRR lgtm.

/approve

[haircommander]

for posterity: this was already done for alpha, we're not changing the feature gate name

[haircommander]

/lgtm

[haircommander]

I took over the last comment https://github.com/kubernetes/enhancements/pull/5409/files#r2155728798 in #5427 , which leaves nothing outstanding here

/lgtm

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