Feat: Move SidecarContainers feature gate to Beta by AryanBagade · Pull Request #4364 · agones-dev/agones

AryanBagade · 2025-11-30T22:26:07Z

Promotes the SidecarContainers feature gate from Alpha to Beta, making it enabled by default. This feature has been stable since v1.49.0 with no error reports

What type of PR is this?
/kind feature

What this PR does / Why we need it:
The SidecarContainers feature refactors how the SDK server runs by utilizing Kubernetes native sidecar container support, decoupling the SDK lifecycle from the GameServer container lifecycle. This feature has been in Alpha since v1.49.0 with no reported issues, indicating it is ready for broader adoption.

Which issue(s) this PR fixes:
Closes #4361

Special notes for your reviewer:

This is a breaking change for users who explicitly rely on SidecarContainers being disabled by default

lacroixthomas · 2025-11-30T23:01:38Z

/gcbrun

lacroixthomas

Thanks for the contribution !
Got a minor change from the feature-stages.md, to match the next release version where it will be available in beta from (to 1.54.0)

site/content/en/docs/Guides/feature-stages.md

AryanBagade · 2025-11-30T23:16:09Z

done

agones-bot · 2025-12-01T00:41:48Z

Build Succeeded 🥳

Build Id: 0254bc2d-e049-4aa8-ab8e-8e329cbb6a89

The following development artifacts have been built, and will exist for the next 30 days:

image: us-docker.pkg.dev/agones-images/ci/agones-controller:1.54.0-dev-c0aa690
image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.54.0-dev-c0aa690
image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.54.0-dev-c0aa690-linux
image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.54.0-dev-c0aa690
image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.54.0-dev-c0aa690
image: us-docker.pkg.dev/agones-images/ci/agones-processor:1.54.0-dev-c0aa690
Linux C++ SDK (build): agonessdk-1.54.0-dev-c0aa690-linux-arch_64.tar.gz
SDK Server: agonessdk-server-1.54.0-dev-c0aa690.zip

A preview of the website (the last 30 builds are retained):

https://c0aa690-dot-preview-dot-agones-images.appspot.com/

To install this version:

git fetch https://github.com/googleforgames/agones.git pull/4364/head:pr_4364 && git checkout pr_4364
helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.54.0-dev-c0aa690

markmandel · 2025-12-02T04:03:39Z

site/content/en/docs/Guides/feature-stages.md

 | [Multiple dynamic port ranges](https://github.com/googleforgames/agones/issues/1911)                                       | `PortRanges`                       | Enabled  | `Beta`   | 1.49.0 |
 | [Rolling Update Fixes](https://github.com/googleforgames/agones/issues/3688)                                               | `RollingUpdateFix`                 | Enabled  | `Beta`   | 1.50.0 |
+| [Scheduled Fleet Autoscaling](https://github.com/googleforgames/agones/issues/3008)                                        | `ScheduledAutoscaler`              | Enabled  | `Beta`   | 1.51.0 |
+| [Sidecar Containers](https://github.com/googleforgames/agones/issues/3642)                                                 | `SidecarContainers`                | Enabled  | `Beta`   | 1.49.0 |


Ah! So close! I wonder if we can squeeze this in before the release tomorrow. If not, no big deal - we'll just need to increment the version numbers in the PR.

Unfortunately this should have not been edited (so leave SidecarContainers as alpha), since docs are published immediately and SidecarContainers are still in Alpha on the current version.

will update it asap no worries

markmandel · 2025-12-02T04:09:09Z

Oh, also noticed the issues with the CLA. If you look here: https://github.com/googleforgames/agones/pull/4364/checks?check_run_id=56852071285

You'll notice you have two separate commit emails for this PR, so either you need to rebase against the one account that has signed the CLA, or need to sign it again with the other email.

AryanBagade · 2025-12-02T10:54:27Z

the other author is @lacroixthomas , his CLA should be already signed, correct??

lacroixthomas · 2025-12-02T16:08:44Z

Hi @AryanBagade

I already signed the CLA a long time ago, but it seems that when you applied the changes from my comment, it used one of my email that seems not to have the CLA signed 🤔 First time I see that

Do you mind to do a rebase (to squash the commit with my name) with your account that have signed the CLA ? This should get rid of "my" commit and pass the CLA test

Sorry about that, I'll have a look to understand why it happened

markmandel · 2025-12-02T17:36:49Z

Hi @AryanBagade

I already signed the CLA a long time ago, but it seems that when you applied the changes from my comment, it used one of my email that seems not to have the CLA signed 🤔 First time I see that

Do you mind to do a rebase (to squash the commit with my name) with your account that have signed the CLA ? This should get rid of "my" commit and pass the CLA test

Sorry about that, I'll have a look to understand why it happened

oooh! That's what happened! Oopsie!

Agreed -- @AryanBagade if you pull it down locally and squash the commits and git push --force back up, that'll solve it. If you have issues let us know, since maintainers can edit this PR as well directly.

And don't stress over timing -- we release every 6 weeks, so no rush.

site/content/en/docs/Guides/health-checking.md

markmandel · 2025-12-12T18:22:31Z

👋🏻 just checking in! Lemme know if you need a hand with the squashing and/or fixing the conflicts.

AryanBagade · 2025-12-12T18:28:41Z

@markmandel apologies for the delay, will be doing it soon!!!!

markmandel · 2025-12-12T20:25:52Z

Now worries, just making sure I'm offering appropriate support 😄

markmandel · 2026-01-08T05:54:53Z

👋🏻 just checking in again. Happy to take this over if you no longer have time to do it.

markmandel · 2026-01-27T23:15:05Z

Hope you don't mind - I took the liberty of updating this PR so we can get it into the next release.

markmandel · 2026-01-27T23:15:37Z

/gcbrun

markmandel · 2026-01-27T23:33:05Z

@lacroixthomas when you get a chance, can you have another look at this, assuming it passes, it should be good to go.

agones-bot · 2026-01-28T00:12:38Z

Build Succeeded 🥳

Build Id: 7601dddc-9de4-41d0-8425-c4aad2b66e85

The following development artifacts have been built, and will exist for the next 30 days:

image: us-docker.pkg.dev/agones-images/ci/agones-controller:1.56.0-dev-259d9dc
image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.56.0-dev-259d9dc
image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.56.0-dev-259d9dc-linux
image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.56.0-dev-259d9dc
image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.56.0-dev-259d9dc
image: us-docker.pkg.dev/agones-images/ci/agones-processor:1.56.0-dev-259d9dc
Linux C++ SDK (build): agonessdk-1.56.0-dev-259d9dc-linux-arch_64.tar.gz
SDK Server: agonessdk-server-1.56.0-dev-259d9dc.zip

A preview of the website (the last 30 builds are retained):

https://259d9dc-dot-preview-dot-agones-images.appspot.com/

To install this version:

git fetch https://github.com/googleforgames/agones.git pull/4364/head:pr_4364 && git checkout pr_4364
helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.56.0-dev-259d9dc

build/Makefile

test/upgrade/versionMap.yaml

Promotes the SidecarContainers feature gate from Alpha to Beta, making it enabled by default. This feature has been stable since v1.49.0 with no error reports.

markmandel · 2026-02-07T00:02:36Z

/gcbrun This should be good now.

agones-bot · 2026-02-07T01:03:02Z

Build Succeeded 🥳

Build Id: e84e4861-67be-4a1d-8687-8031a85433af

The following development artifacts have been built, and will exist for the next 30 days:

image: us-docker.pkg.dev/agones-images/ci/agones-controller:1.56.0-dev-fcbc85f
image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.56.0-dev-fcbc85f
image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.56.0-dev-fcbc85f-linux
image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.56.0-dev-fcbc85f
image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.56.0-dev-fcbc85f
image: us-docker.pkg.dev/agones-images/ci/agones-processor:1.56.0-dev-fcbc85f
Linux C++ SDK (build): agonessdk-1.56.0-dev-fcbc85f-linux-arch_64.tar.gz
SDK Server: agonessdk-server-1.56.0-dev-fcbc85f.zip

A preview of the website (the last 30 builds are retained):

https://fcbc85f-dot-preview-dot-agones-images.appspot.com/

To install this version:

git fetch https://github.com/googleforgames/agones.git pull/4364/head:pr_4364 && git checkout pr_4364
helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.56.0-dev-fcbc85f

lacroixthomas · 2026-02-10T22:36:35Z

LGTM !

* Move SidecarContainers feature gate to Beta Promotes the SidecarContainers feature gate from Alpha to Beta, making it enabled by default. This feature has been stable since v1.49.0 with no error reports. * Review updates. --------- Co-authored-by: Mark Mandel <mark@compoundtheory.com>

github-actions bot added kind/feature New features for Agones size/S labels Nov 30, 2025

lacroixthomas reviewed Nov 30, 2025

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AryanBagade requested a review from lacroixthomas December 1, 2025 01:47

markmandel reviewed Dec 2, 2025

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markmandel mentioned this pull request Dec 2, 2025

feat: promote FleetAutoscaleRequestMetaData to beta #4365

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markmandel reviewed Dec 5, 2025

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markmandel added the kind/breaking Breaking change label Jan 27, 2026

markmandel force-pushed the feature/move-sidecarcontainers-to-beta branch 2 times, most recently from dfae69b to 259d9dc Compare January 27, 2026 23:14

markmandel requested review from igooch, peterzhongyi and vicentefb January 28, 2026 00:53

lacroixthomas reviewed Jan 28, 2026

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Move SidecarContainers feature gate to Beta

5e89472

Promotes the SidecarContainers feature gate from Alpha to Beta, making it enabled by default. This feature has been stable since v1.49.0 with no error reports.

Review updates.

fcbc85f

markmandel force-pushed the feature/move-sidecarcontainers-to-beta branch from 728a7fb to fcbc85f Compare February 7, 2026 00:00

lacroixthomas enabled auto-merge (squash) February 10, 2026 22:36

lacroixthomas approved these changes Feb 10, 2026

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lacroixthomas merged commit 286c561 into agones-dev:main Feb 10, 2026
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