Feature blog for StatefulSet Autodelete beta graduation #39819

mattcary · 2023-03-06T20:17:22Z

Nancy-Chauhan · 2023-03-23T06:48:35Z

Hello, Comms Shadow for the 1.27 release here. This feature blog is tracked for release, the deadline for submitting the draft is 4th of April- the sooner the better since there's still editing to be done afterwards 😃 Any doubt, the Comms team is here to help. CC @harshitasao

mattcary · 2023-03-23T15:26:51Z

Sounds good, I'll get on it, thanks for the ping.

harshitasao · 2023-03-31T07:20:55Z

Hello @mattcary, we're doing a global reminder about submitting a draft for review for all opted-in feature blogs. If it's at all possible, it is very helpful for the release team to have drafts submitted for review before the hard deadline date, to better plan the release dates and avoid missing out. Thank you!

mattcary · 2023-04-03T15:41:52Z

Time flies!

I've enclosed a draft. It's heavily based on the alpha blog post --- but that was from a year and a half ago, so it's probably ok (?).

Thanks

netlify · 2023-04-03T15:54:59Z

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sftim · 2023-04-04T13:25:26Z

/hold
pending assignment of publication date

sftim

Thanks

A few thoughts.

sftim · 2023-04-04T13:26:04Z

content/en/blog/_posts/2023-03-06-statefulset-autodelete.md

+
+**Author:** Matthew Cary (Google)
+
+Kubernetes v1.27 graduates to beta a new policy for


Suggested change

Kubernetes v1.27 graduates to beta a new policy for

Kubernetes v1.27 graduated to beta a new policy mechanism for

sftim · 2023-04-04T13:26:47Z

content/en/blog/_posts/2023-03-06-statefulset-autodelete.md

+
+## What’s next?
+
+Try it out! The beta Enable the `StatefulSetAutoDeletePVC` feature gate is enabled by default on


Suggested change

Try it out! The beta Enable the `StatefulSetAutoDeletePVC` feature gate is enabled by default on

Try it out! The `StatefulSetAutoDeletePVC` feature gate is beta and enabled by default on

sftim · 2023-04-04T13:27:40Z

content/en/blog/_posts/2023-03-06-statefulset-autodelete.md

+## What’s next?
+
+Try it out! The beta Enable the `StatefulSetAutoDeletePVC` feature gate is enabled by default on
+cluster versions 1.27 and greater. Create a StatefulSet using the new policy, test it out and tell


Suggested change

cluster versions 1.27 and greater. Create a StatefulSet using the new policy, test it out and tell

clusters running Kubernetes 1.27. Create a StatefulSet using the new policy, test it out and tell

Don't promise or imply that all future minor versions have this feature gate; that's unlikely.

Oops good point done.

sftim · 2023-04-04T13:28:03Z

content/en/blog/_posts/2023-03-06-statefulset-autodelete.md

+us what you think!
+
+I'm very curious to see if this owner reference mechanism works well in practice. For example, I
+realized there is no mechanism in Kubernetes for knowing who set a reference, so it’s possible that


Server Side Apply, no?

Hmm that's a good idea. I wish you had reviewed the KEP :-)

I'll have to try that out---even if current controller don't use it, using it here could clean things up.

sftim

/hold
pending assignment of publication date

harshitasao · 2023-04-07T19:40:59Z

Hello, Comms Lead for v1.27 here. The publication order and date for the Feature Blog series has been finalized and the tracking board is updated.

The publication date for this article is 04-05-2023 (May 04).

Thank you!

mattcary · 2023-04-07T19:51:00Z

Updated!

xing-yang · 2023-04-15T14:44:59Z

content/en/blog/_posts/2023-05-04-statefulset-autodelete.md

+---
+layout: blog
+title: 'Kubernetes 1.27: StatefulSet PVC Auto-Deletion (beta)'
+date: 04-05-2023


Should this be 05-04-2023 (May 04)?

switched to year-first date so there's no ambiguity

stmcginnis

Looks great, just some minor suggestions.

stmcginnis · 2023-04-24T12:13:07Z

content/en/blog/_posts/2023-05-04-statefulset-autodelete.md

+are scaled down.
+
+## What problem does this solve?
+A StatefulSet spec can include Pod and PVC templates. When a replica is first created, the


If we ever choose to add markdown linting, technically there should be a line break between the title and content lines.

stmcginnis · 2023-04-24T12:13:38Z

content/en/blog/_posts/2023-05-04-statefulset-autodelete.md

+A StatefulSet spec can include Pod and PVC templates. When a replica is first created, the
+Kubernetes control plane creates a PVC for that replica if one does not already exist. The behavior
+before the PVC retention policy was that the control plane never cleaned up the PVCs created for
+StatefulSets - this was left up to the cluster administrator, or to some add-on automation that


I think it would be good to format (StatefulSets) the Kubernetes objects throughout.

stmcginnis · 2023-04-24T12:15:34Z

content/en/blog/_posts/2023-05-04-statefulset-autodelete.md

+  * **`whenDeleted` and `whenScaled` are both `Retain`.** This matches the existing behavior for
+    StatefulSets, where no PVCs are deleted. This is also the default retention policy. It’s
+    appropriate to use when data on StatefulSet volumes may be irreplaceable and should only be
+    deleted manually.


Suggested change

* **`whenDeleted` and `whenScaled` are both `Retain`.** This matches the existing behavior for

StatefulSets, where no PVCs are deleted. This is also the default retention policy. It’s

appropriate to use when data on StatefulSet volumes may be irreplaceable and should only be

deleted manually.

* **`whenDeleted` and `whenScaled` are both `Retain`.**

This matches the existing behavior for

StatefulSets, where no PVCs are deleted. This is also the default retention policy. It’s

appropriate to use when data on StatefulSet volumes may be irreplaceable and should only be

deleted manually.

I think separating the condition statement from the description for all of these would make this easier to parse.

stmcginnis · 2023-04-24T20:55:29Z

/lgtm

Thanks!

k8s-ci-robot · 2023-04-24T20:55:36Z

LGTM label has been added.

Git tree hash: f59339cd72c8fbb1709140ca30a3a0d1224f3648

mattcary · 2023-04-24T20:56:10Z

/lgtm

Thanks!

thank you!

sftim

Date looks right
/hold cancel

sftim · 2023-05-03T00:04:42Z

/approve

k8s-ci-robot · 2023-05-03T00:05:00Z

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sftim · 2023-05-03T00:09:58Z

https://deploy-preview-39819--kubernetes-io-main-staging.netlify.app/blog/2023/05/04/kubernetes-1-27-statefulset-pvc-auto-deletion-beta/ LGTM

Will ~~approve~~ merge manually.

k8s-ci-robot requested review from nate-double-u and sftim March 6, 2023 20:17

k8s-ci-robot added the sig/docs Categorizes an issue or PR as relevant to SIG Docs. label Mar 6, 2023

mattcary mentioned this pull request Mar 10, 2023

Auto remove PVCs created by StatefulSet kubernetes/enhancements#1847

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Feature blog for StatefulSet Autodelete beta graduation

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sftim merged commit d659949 into kubernetes:main May 3, 2023


		Author: Matthew Cary (Google)

		Kubernetes v1.27 graduates to beta a new policy for

	Kubernetes v1.27 graduates to beta a new policy for
	Kubernetes v1.27 graduated to beta a new policy mechanism for


		## What’s next?

		Try it out! The beta Enable the `StatefulSetAutoDeletePVC` feature gate is enabled by default on

	Try it out! The beta Enable the `StatefulSetAutoDeletePVC` feature gate is enabled by default on
	Try it out! The `StatefulSetAutoDeletePVC` feature gate is beta and enabled by default on

	cluster versions 1.27 and greater. Create a StatefulSet using the new policy, test it out and tell
	clusters running Kubernetes 1.27. Create a StatefulSet using the new policy, test it out and tell

Feature blog for StatefulSet Autodelete beta graduation #39819

Feature blog for StatefulSet Autodelete beta graduation #39819

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mattcary commented Mar 6, 2023

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