Add Azure Linux 4 to libraries Helix extra-platforms (linux_x64) by richlander · Pull Request #127613 · dotnet/runtime

richlander · 2026-04-30T16:59:09Z

Note

This PR description was AI/Copilot-generated.

Adds Azure Linux 4 to the libraries Helix extra-platforms queue set for linux_x64 (CoreCLR inner-loop) in eng/pipelines/libraries/helix-queues-setup.yml.

Change

File	Distro	Slot	Action
`eng/pipelines/libraries/helix-queues-setup.yml`	AzureLinux 4.0	extra-platforms `linux_x64`	Added

Queue entry:

(AzureLinux.4.0.Amd64.Open)AzureLinux.3.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:azurelinux-4.0-helix-amd64@sha256:00d7174904a88fcc7ed07b7a4af7154a3268b9b1f92aee85102c3808e98e8431

Host queue is AzureLinux.3.Amd64.Open, matching all other container-backed entries in the same section (Debian 13, Fedora 44, openSUSE 16.0).

Image availability

The exact tag azurelinux-4.0-helix-amd64 is present in image-info.dotnet-dotnet-buildtools-prereqs-docker-main.json. Digest pinned in the queue string above.

Scope

helix-platforms.yml is intentionally not updated — those values are reserved for GA releases, and Azure Linux 4 has not yet GA'd. This change only adds opt-in coverage via the extra-platforms pipeline.

CI

This change only affects the extra-platforms (isExtraPlatformsBuild) path. After this PR is opened, run:

/azp run runtime-extra-platforms

References

Adds azurelinux-4.0-helix-amd64 to the extra-platforms CoreCLR inner-loop queue set in eng/pipelines/libraries/helix-queues-setup.yml. Image tag verified present in image-info.dotnet-dotnet-buildtools-prereqs-docker-main.json. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

richlander · 2026-04-30T17:00:27Z

/azp run runtime-extra-platforms

dotnet-policy-service · 2026-04-30T17:00:37Z

Tagging subscribers to this area: @dotnet/area-infrastructure-libraries
See info in area-owners.md if you want to be subscribed.

azure-pipelines · 2026-04-30T17:00:41Z

Azure Pipelines successfully started running 1 pipeline(s).

Copilot

Pull request overview

This PR expands the libraries Helix queue configuration for the linux_x64 CoreCLR inner-loop path by adding an Azure Linux 4.0 container-backed queue to the extra-platforms set, increasing opt-in OS coverage without changing the general/GA platform sets.

Changes:

Add a new extra-platforms Helix queue entry for AzureLinux.4.0.Amd64.Open using the azurelinux-4.0-helix-amd64 prereqs container image (digest-pinned).
Keep the host queue consistent with the existing container-backed extra-platforms entries (AzureLinux.3.Amd64.Open).
Scope the change to the isExtraPlatformsBuild && testScope != outerloop CoreCLR path only.

vcsjones · 2026-04-30T18:16:46Z

Test System.Security.Cryptography.Tests.ChaCha20Poly1305IsSupportedTests.CheckIsSupported has failed.

I can open a pull request to fix this.

richlander · 2026-04-30T19:43:15Z

Thanks @vcsjones. I cannot get crypto-related failures past your eyes easily! Much appreciated.

vcsjones · 2026-04-30T21:46:54Z

@richlander The ChaCha20Poly1305 test failure fix is merged in #127618

The other test failure is QUIC related. This test is failing.

runtime/src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicPlatformDetectionTests.cs

Lines 63 to 66 in c77572b

    
           public void SupportedLinuxPlatforms_IsSupportedIsTrue() 
        
           { 
        
               _output.WriteLine($"Running on {PlatformDetection.GetDistroVersionString()}"); 
        
               Assert.True(QuicListener.IsSupported);

It's testing that QUIC is supported on the underlying platform. It seems that the AZL4 image doesn't have a working version of MsQuic available, or for some other reason was not able to load. cc @dotnet/ncl

richlander · 2026-04-30T22:32:47Z

/azp run runtime-extra-platforms

azure-pipelines · 2026-04-30T22:33:01Z

Azure Pipelines successfully started running 1 pipeline(s).

vcsjones · 2026-04-30T22:46:46Z

Ah, okay, it is known that libmsquic is not available dotnet/dotnet-buildtools-prereqs-docker#1646

richlander · 2026-05-01T03:57:55Z

@wfurt @ahmedilyasms what's the best pattern here? Disable the test for Azure Linux 4 or build libmsquic in the helix image?

wfurt · 2026-05-01T04:14:55Z

@wfurt @ahmedilyasms what's the best pattern here? Disable the test for Azure Linux 4 or build libmsquic in the helix image?

yes, I think so. I did ping MsQuic team about this and submitted PR for Ubuntu 26 but it may take some time to get it actually out.

richlander · 2026-05-01T12:14:04Z

@wfurt -- what does "yes I think so" refer to? I gave two options.

wfurt · 2026-05-01T16:52:08Z

@wfurt -- what does "yes I think so" refer to? I gave two options.

yes, disable tests. unless @ManickaP disagrees. I feel we can get the binaries in reasonable timeframe and I don't think it is worth do deal with all the building crap. The msquic binaries are all identical so if anything I would find a way how to get the package from previous release.

richlander · 2026-05-01T17:40:23Z

Can you disable the tests for Azure Linux 4?

…or now.

vcsjones · 2026-05-01T19:06:45Z

Can you disable the tests for Azure Linux 4?

I disabled it directly in this pull request for now.

Copilot

Copilot's findings

Files reviewed: 2/2 changed files
Comments generated: 2

github-actions · 2026-05-01T19:14:57Z

Note

This review was generated by Copilot.

🤖 Copilot Code Review — PR #127613

Holistic Assessment

Motivation: Justified — expanding Helix test coverage to Azure Linux 4.0 (pre-GA, opt-in via extra-platforms) is standard practice for early platform validation, consistent with how Debian 13, Fedora 44, and openSUSE 16.0 were added to the same section.

Approach: Correct — the change follows the established pattern exactly: digest-pinned container image on the AzureLinux.3.Amd64.Open host queue, scoped to the isExtraPlatformsBuild inner-loop path only. The [ActiveIssue] skip for the QUIC test is the right mechanism for a known missing dependency (libmsquic), tracked by issue #127658.

Summary: ✅ LGTM. This is a clean, minimal infrastructure change (2 lines across 2 files) that follows all established patterns and conventions. No correctness, performance, or compatibility concerns.

Detailed Findings

✅ Helix Queue Entry — Correct format and placement

The new entry at eng/pipelines/libraries/helix-queues-setup.yml line 64:

(AzureLinux.4.0.Amd64.Open)AzureLinux.3.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:azurelinux-4.0-helix-amd64@sha256:00d7174904a88fcc7ed07b7a4af7154a3268b9b1f92aee85102c3808e98e8431

Verified:

✅ Uses digest-pinned image (not a mutable tag)
✅ Host queue is AzureLinux.3.Amd64.Open, consistent with all sibling container-backed entries (Debian 13, Fedora 44, openSUSE 16.0) in the same block
✅ Placed first in the list, maintaining alphabetical order (AzureLinux < Debian < Fedora < openSUSE)
✅ Scoped to isExtraPlatformsBuild && testScope != outerloop — does not affect GA platform sets or outerloop testing
✅ helix-platforms.yml is intentionally unchanged (correct for pre-GA distros)

✅ ActiveIssue Annotation — Proper test skip for known platform limitation

At MsQuicPlatformDetectionTests.cs line 39:

[ActiveIssue("https://github.com/dotnet/runtime/issues/127658", typeof(PlatformDetection), nameof(PlatformDetection.IsAzureLinux4OrHigher))]

Verified:

✅ References a valid, open tracking issue (Re-enable QUIC tests for Azure Linux 4 #127658) explaining libmsquic is not yet available on Azure Linux 4
✅ The PlatformDetection.IsAzureLinux4OrHigher property exists in PlatformDetection.Unix.cs (line 34) and is already used elsewhere (e.g., ChaCha20Poly1305Tests.cs)
✅ Applied to the correct test method (SupportedLinuxPlatformsWithMsQuic_IsSupportedIsTrue) which specifically checks for libmsquic availability
✅ The sibling test SupportedLinuxPlatforms_IsSupportedIsTrue (line 62) is NOT annotated, which is correct — it is gated by [ConditionalFact] and the class-level [ConditionalClass(typeof(QuicTestBase))] will skip when QUIC is not detected

✅ Cross-cutting check — No other tests needing similar skip

The class-level [ConditionalClass(typeof(QuicTestBase))] prevents QUIC functional tests from running when QuicListener.IsSupported is false. Only SupportedLinuxPlatformsWithMsQuic_IsSupportedIsTrue needs the [ActiveIssue] because it uses unconditional [Fact] and explicitly checks for the library.

✅ Scope — Appropriately narrow

No changes to helix-platforms.yml (GA platforms)
No unrelated modifications or whitespace noise
No new public API surface
PR is focused on a single purpose: adding a new platform to extra-platforms testing

Generated by Code Review for issue #127613 · ◷

wfurt · 2026-05-01T19:51:08Z

thanks @vcsjones . It seems like adding msquic is trivial so I changed my mind and posted dotnet/dotnet-buildtools-prereqs-docker#1648 If that works, we should be able to do all the testing. AZL crypto has been ..... interesting .... so I think there may be some value there.

richlander · 2026-05-01T21:12:52Z

That didn't work @wfurt. AZL3 and 4 are incompatible.

richlander · 2026-05-01T21:13:39Z

/azp run runtime-extra-platforms

azure-pipelines · 2026-05-01T21:14:00Z

Azure Pipelines successfully started running 1 pipeline(s).

wfurt · 2026-05-01T21:50:55Z

That didn't work @wfurt. AZL3 and 4 are incompatible.

what error do you see? Copilot claims otherwise.

Copilot AI review requested due to automatic review settings April 30, 2026 16:59

github-actions Bot added the area-Infrastructure-libraries label Apr 30, 2026

dotnet-policy-service Bot assigned richlander Apr 30, 2026

Copilot started reviewing on behalf of richlander April 30, 2026 16:59 View session

Copilot AI reviewed Apr 30, 2026

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vcsjones mentioned this pull request Apr 30, 2026

Fix ChaCha20Poly1305 IsSupported test on Azure Linux 4 #127618

Merged

build-analysis Bot mentioned this pull request Apr 30, 2026

Unable to pull image from mcr.microsoft.com #117164

Open

Merge branch 'main' into azl4

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build-analysis Bot mentioned this pull request May 1, 2026

XHarness package install failure on iOS due to devicectl NSPOSIXErrorDomain error 49 #123796

Open

Disable SupportedLinuxPlatformsWithMsQuic_IsSupportedIsTrue on AZL4 f…

ffb6028

…or now.

Copilot AI review requested due to automatic review settings May 1, 2026 19:05

Copilot started reviewing on behalf of vcsjones May 1, 2026 19:06 View session

vcsjones requested a review from ManickaP May 1, 2026 19:06

Copilot AI reviewed May 1, 2026

View reviewed changes

Comment thread src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicPlatformDetectionTests.cs

Comment thread src/libraries/System.Net.Quic/tests/FunctionalTests/MsQuicPlatformDetectionTests.cs

This was referenced May 2, 2026

[android][arm64] System.Net.Sockets.Tests.SendTo_SyncForceNonBlocking.Datagram_UDP_ShouldImplicitlyBindLocalEndpoint fails with NetworkUnreachable #120526

Open

Flaky test: StartDetached_GrandchildSurvivesSignalingParent(enable: False) #126936

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richlander commented Apr 30, 2026

Change

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Scope

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References

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github-actions Bot commented May 1, 2026

🤖 Copilot Code Review — PR #127613

Holistic Assessment

Detailed Findings

✅ Helix Queue Entry — Correct format and placement

✅ ActiveIssue Annotation — Proper test skip for known platform limitation

✅ Cross-cutting check — No other tests needing similar skip

✅ Scope — Appropriately narrow

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