Add blog post for PSI Metrics graduate to Beta by roycaihw · Pull Request #51574 · kubernetes/website

roycaihw · 2025-07-10T21:50:53Z

Description

This commit adds a new blog post to announce that Pressure Stall Information (PSI) Metrics has graduated to Beta in Kubernetes v1.34.

The post explains what PSI is, how it's exposed in Kubernetes through the Summary API and Prometheus, and how users can enable this feature to better monitor node health and resource pressure.

Issue

Ref: kubernetes/enhancements#4205

/sig node

netlify · 2025-07-10T22:01:06Z

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dipesh-rawat · 2025-07-11T17:22:36Z

Hi @serathius @roycaihw 👋 v1.34 Communications team here,

@serathius as author of #51582, I'd like you to be a writing buddy for @roycaihw on this PR.

Please:

Review this PR, paying attention to the guidelines and review hints
Update your own PR based on any best practices you identify that should be applied
Remember to be compassionate with your fellow article author

aibarbetta · 2025-07-13T21:18:49Z

/sig release

dipesh-rawat · 2025-07-25T15:19:27Z

Hi 👋, v1.34 Communications Team here again!

This blog originally aimed to cover two KEPs, but since one of them KEP-5394 has been removed from the v1.34 milestone (refer kubernetes/enhancements#5394 (comment)), only one KEP-4205 is currently in scope for this release.

@roycaihw, would you like to continue with this blog focusing solely on the KEP-4205 that made it into v1.34? Or would you prefer to close this PR if you feel there isn’t enough content to move forward?

Happy to support either way - just let us know what works best!
cc. @aibarbetta (v1.34 Comms Lead) to keep the team aligned.

dipesh-rawat · 2025-07-30T14:22:12Z

Hi @roycaihw 👋, v1.34 Communications Team here again!

Just a friendly reminder that we are approaching the feature blog "Ready for review" deadline: Friday 8th August 2025. We ask you to have the blog in non-draft state, and all write-up to be complete.

If you have any questions or need help, please don't hesitate to reach out to me or any of the Communications Team members. We are here to help you!

dipesh-rawat · 2025-08-07T21:15:09Z

Hi @roycaihw 👋, v1.34 Communications Team here again!

Just a friendly reminder that we are approaching the feature blog "Ready for review" deadline: Friday 8th August 2025. We ask you to have the blog in non-draft state, and all write-up to be complete.

If you have any questions or need help, please don't hesitate to reach out to me or any of the Communications Team members. We are here to help you!

Hi @roycaihw, Just a heads up: the deadline for the feature blog “Ready for Review” is coming up on Friday, 8th August 2025, as mentioned above.

If you have any questions, please don't hesitate to reach out.

The post explains what PSI is, how it's exposed in Kubernetes through the Summary API and Prometheus, and how users can enable this feature to better monitor node health and resource pressure.

roycaihw · 2025-08-08T20:31:03Z

The blog is ready for review

/cc @haircommander

lmktfy · 2025-08-10T21:29:59Z

+*   **`some`**: The percentage of time that *at least one* task is stalled on a resource. This indicates some level of resource contention.
+*   **`full`**: The percentage of time that *all non-idle* tasks are stalled on a resource simultaneously. This indicates a more severe resource bottleneck.


Check the rendering, but this should come out as a description list (our recommended way to format this kind of definition-and-explanation series).

Suggested change

* **`some`**: The percentage of time that *at least one* task is stalled on a resource. This indicates some level of resource contention.

* **`full`**: The percentage of time that *all non-idle* tasks are stalled on a resource simultaneously. This indicates a more severe resource bottleneck.

`some`

: The percentage of time that **at least one** task is stalled on a resource. This indicates some level of resource contention.

`full`

: The percentage of time that **all** non-idle tasks are stalled on a resource simultaneously. This indicates a more severe resource bottleneck.

Done. I'm not sure if I got it right. PTAL

lmktfy · 2025-08-10T21:30:29Z

Even better: use the Vienna convention stop shape (an octagon) for stalls. It looks like 🛑.

Red and green indistinguishability is the most common form of impaired color vision. Using different shapes is more inclusive.

I recommend making the change, but we can merge the PR even if it hasn't happened.

Really nice. I like it.

lmktfy

Happy to merge this. Thanks for the work that went in to it.

lmktfy · 2025-08-15T17:03:03Z

@@ -0,0 +1,65 @@
+---
+layout: blog
+title: "PSI Metrics for Kubernetes Graduates to Beta"


nit (but we can fix this post merge) the title should usually mention Kubernetes 1.34

lmktfy · 2025-08-15T17:03:35Z

Really nice. I like it.

lmktfy · 2025-08-15T17:06:21Z

/lgtm
/approve

k8s-ci-robot · 2025-08-15T17:06:29Z

LGTM label has been added.

Details

Git tree hash: b17949b0ae8304886f5bc695960fae607c877e73

k8s-ci-robot · 2025-08-15T17:06:30Z

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k8s-ci-robot added do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. area/blog Issues or PRs related to the Kubernetes Blog subproject labels Jul 10, 2025

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dipesh-rawat mentioned this pull request Jul 11, 2025

Blogpost for KEP-4988 #51582

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k8s-ci-robot added the sig/release Categorizes an issue or PR as relevant to SIG Release. label Jul 13, 2025

SergeyKanzhelev mentioned this pull request Jul 25, 2025

Support PSI based on cgroupv2 kubernetes/enhancements#4205

Closed

34 tasks

Blog post for PSI Metrics Beta graduation

bc08ade

The post explains what PSI is, how it's exposed in Kubernetes through the Summary API and Prometheus, and how users can enable this feature to better monitor node health and resource pressure.

roycaihw force-pushed the psi-blog branch from 6a8a29c to bc08ade Compare August 8, 2025 20:25

k8s-ci-robot added sig/docs Categorizes an issue or PR as relevant to SIG Docs. size/M Denotes a PR that changes 30-99 lines, ignoring generated files. and removed size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. labels Aug 8, 2025

roycaihw changed the title ~~[WIP] Add blog post for PSI~~ Add blog post for PSI Metrics graduate to Beta Aug 8, 2025

roycaihw marked this pull request as ready for review August 8, 2025 20:28

k8s-ci-robot removed the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label Aug 8, 2025

k8s-ci-robot requested review from dipesh-rawat and natalisucks August 8, 2025 20:28

k8s-ci-robot requested a review from haircommander August 8, 2025 20:31

lmktfy reviewed Aug 10, 2025

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graz-dev reviewed Aug 14, 2025

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Comment thread content/en/blog/_posts/2025-08-08-introducing-psi-metrics-beta/index.md Outdated

Address comments

ce648f6

lmktfy reviewed Aug 15, 2025

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k8s-ci-robot assigned lmktfy Aug 15, 2025

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k8s-ci-robot merged commit 88fee73 into kubernetes:main Aug 15, 2025
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dipesh-rawat mentioned this pull request Aug 27, 2025

Schedule KEP-4205 blog for publication #52052

Merged

roycaihw mentioned this pull request Sep 2, 2025

Enhance PSI example CPU stress pod; fix PSI Prometheus metrics grep regex #52037

Merged

		* `some`: The percentage of time that at least one task is stalled on a resource. This indicates some level of resource contention.
		* `full`: The percentage of time that all non-idle tasks are stalled on a resource simultaneously. This indicates a more severe resource bottleneck.

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