Blog with KEP-3902 in 1.34 by carlory · Pull Request #51560 · kubernetes/website

carlory · 2025-07-09T06:52:26Z

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netlify · 2025-07-09T07:02:26Z

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graz-dev · 2025-07-09T22:13:10Z

/area blog

dipesh-rawat · 2025-07-11T10:35:12Z

Hi @atiratree @carlory 👋 v1.34 Communications team here,

@atiratree as author of #45268, I'd like you to be a writing buddy for @carlory 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 · 2025-07-13T21:26:21Z

/sig release

graz-dev · 2025-07-31T15:55:04Z

Hi @carlory 👋 -- this is Graz from the v1.34 Communications Team!

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!

carlory · 2025-08-06T03:51:23Z

@graz-dev updated.

aibarbetta · 2025-08-06T23:05:42Z

@carlory is this ready for review?
@graz-dev since the writing buddy is from a KEP that was removed from the v1.34 milestone, can you cover the review?

content/en/blog/_posts/XXXX-XX-XX-taint-eviction-controller-moves-ga.md

carlory · 2025-08-07T02:23:55Z

@aibarbetta Yes, it is ready for review.

graz-dev · 2025-08-11T08:54:07Z

content/en/blog/_posts/XXXX-XX-XX-taint-eviction-controller-moves-ga.md

@@ -0,0 +1,40 @@
+---
+layout: blog
+title: "Kubernetes v1.34: Decoupling taint-manager from node-lifecycle-controller Moves to GA"


Suggested change

title: "Kubernetes v1.34: Decoupling taint-manager from node-lifecycle-controller Moves to GA"

title: "Kubernetes v1.34: Decoupling TaintManager from NodeLifecycleController Moves to GA"

In other post we used to mention these components as CamelCase: https://kubernetes.io/blog/2023/12/13/kubernetes-v1-29-release/#node-lifecycle-separated-from-taint-management-sig-scheduling-https-github-com-kubernetes-community-tree-master-sig-scheduling

But in other blog posts we mentioned it as reported here: https://kubernetes.io/blog/2023/12/19/kubernetes-1-29-taint-eviction-controller/

@lmktfy in your opinion what is the right one?

I'd write "node lifecycle controller" (no quotes). Use English by default; we make exceptions for some things, but usually not controllers.

(It's different if the controller name is a proper noun, eg Karpenter).

For a title, how about this

Kubernetes v1.34: Decoupled Taint Manager Is Now Stable

?

updated with Kubernetes v1.34: Decoupled Taint Manager Is Now Stable

graz-dev · 2025-08-11T09:32:00Z

content/en/blog/_posts/XXXX-XX-XX-taint-eviction-controller-moves-ga.md

+The feature gate `SeparateTaintEvictionController` has been promoted to GA in this release.
+Users can optionally disable taint-based eviction by setting `--controllers=-taint-eviction-controller` 
+in kube-controller-manager. 
+


I suggest to add some more datails to this paragraph just to keep it informative without just linking to other resources. That's an example of what I would add:

This enhancement separates the responsibility of managing node health and pod eviction into two distinct components. Previously, the node-lifecycle-controller handled both marking nodes as unhealthy with NoExecute taints and evicting pods from them. Now, a dedicated taint-eviction-controller manages the eviction process, while the node-lifecycle-controller focuses solely on applying taints. This decoupling improves maintainability and offers greater flexibility, allowing administrators to implement custom eviction strategies tailored to specific workloads, such as stateful applications that require more graceful handling of node failures to prevent data loss.

That's just a reference of what I mean, and it's written just by reading the KEP content so it can be not 100% correct.

content/en/blog/_posts/XXXX-XX-XX-taint-eviction-controller-moves-ga.md

lmktfy · 2025-08-12T22:38:02Z

content/en/blog/_posts/XXXX-XX-XX-taint-eviction-controller-moves-ga.md

+
+## How can I learn more?
+
+For more details, refer to the [KEP](http://kep.k8s.io/3902) and [Blog](/blog/2023/12/19/taint-eviction-controller).


Suggested change

For more details, refer to the [KEP](http://kep.k8s.io/3902) and [Blog](/blog/2023/12/19/taint-eviction-controller).

For more details, refer to the [KEP](http://kep.k8s.io/3902) and to the beta announcement article: [Kubernetes 1.29: Decoupling taint-manager from node-lifecycle-controller](/blog/2023/12/19/kubernetes-1-29-taint-eviction-controller/).

BTW if we want to fix the title of the previous article to omit the - characters, we just can (in this PR, even). No need for a special approval process.

content/en/blog/_posts/XXXX-XX-XX-taint-eviction-controller-moves-ga.md

Signed-off-by: carlory <baofa.fan@daocloud.io>

lmktfy

/lgtm
/approve

lmktfy · 2025-08-21T18:14:00Z

content/en/blog/_posts/XXXX-XX-XX-decoupled-taint-manager-is-now-stable.md

+  Baofa Fan (DaoCloud)
+---
+
+This enhancement separates the responsibility of managing node lifecycle and pod eviction into two distinct components.


nit: (could fix after a merge)

I recommend hyperlinking to https://kubernetes.io/docs/concepts/scheduling-eviction/

As a side note, I think actually that page (Scheduling, Preemption and Eviction) should change to mention the taint eviction controller a little more.

k8s-ci-robot · 2025-08-21T18:15:14Z

LGTM label has been added.

Details

Git tree hash: 98f5cfd2abb5b11690932013d631db1944e7b137

k8s-ci-robot · 2025-08-21T18:15:22Z

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lmktfy

The full list of commands accepted by this bot can be found here.

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~~content/en/blog/OWNERS~~ [lmktfy]

Approvers can indicate their approval by writing /approve in a comment
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k8s-ci-robot added cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. labels Jul 9, 2025

carlory mentioned this pull request Jul 9, 2025

Decouple TaintManager from NodeLifecycleController kubernetes/enhancements#3902

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k8s-ci-robot added the area/blog Issues or PRs related to the Kubernetes Blog subproject label Jul 9, 2025

dipesh-rawat mentioned this pull request Jul 11, 2025

[WIP] [KEP-5882]: feature blog for DeploymentPodReplacementPolicy placeholder PR #45268

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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

carlory force-pushed the KEP3902BLOG branch from 95c633e to fb2037d Compare August 6, 2025 03:50

k8s-ci-robot added language/en Issues or PRs related to English language 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 6, 2025

carlory changed the title ~~[placeholder] Blog with KEP-3902 in 1.34~~ Blog with KEP-3902 in 1.34 Aug 6, 2025

aibarbetta reviewed Aug 6, 2025

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graz-dev reviewed Aug 11, 2025

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lmktfy reviewed Aug 12, 2025

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Blog with KEP-3902 in 1.34

c9ac4be

Signed-off-by: carlory <baofa.fan@daocloud.io>

carlory force-pushed the KEP3902BLOG branch from 1f069b3 to c9ac4be Compare August 15, 2025 02:36

lmktfy reviewed Aug 21, 2025

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k8s-ci-robot assigned lmktfy Aug 21, 2025

k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Aug 21, 2025

k8s-ci-robot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Aug 21, 2025

k8s-ci-robot merged commit 2a0dbcb into kubernetes:main Aug 21, 2025
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graz-dev mentioned this pull request Sep 2, 2025

Publish Feature Blogs #52157

Merged

	title: "Kubernetes v1.34: Decoupling taint-manager from node-lifecycle-controller Moves to GA"
	title: "Kubernetes v1.34: Decoupling TaintManager from NodeLifecycleController Moves to GA"


		## How can I learn more?

		For more details, refer to the [KEP](http://kep.k8s.io/3902) and [Blog](/blog/2023/12/19/taint-eviction-controller).

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carlory commented Jul 9, 2025

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Kubernetes v1.34: Decoupled Taint Manager Is Now Stable

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