Add Alma Linux SB CI leg to validate min glibc support (#42106)

Author: MichaelSimons

eng/pipelines/templates/stages/vmr-build.yml

@@ -144,6 +144,24 @@ stages:
       ### Additional jobs for full build ###
       - ${{ if in(parameters.scope, 'full') }}:
 
+        # This AlmaLinux leg is intended to build with the min supported glibc version
+        - template: ../jobs/vmr-build.yml
+          parameters:
+            # Changing the build name requires updating the referenced name in the source-build-sdk-diff-tests.yml pipeline
+            buildName: ${{ format('{0}_Offline_MsftSdk', variables.almaLinuxName) }}
+            isBuiltFromVmr: ${{ parameters.isBuiltFromVmr }}
+            vmrBranch: ${{ variables.VmrBranch }}
+            architecture: x64
+            pool: ${{ parameters.pool_Linux }}
+            container: ${{ variables.almaLinuxContainer }}
+            buildFromArchive: false            # 🚫
+            buildSourceOnly: true              # ✅
+            enablePoison: false                # 🚫
+            excludeOmniSharpTests: true        # ✅
+            runOnline: false                   # 🚫
+            useMonoRuntime: false              # 🚫
+            withPreviousSDK: false             # 🚫
+
         - template: ../jobs/vmr-build.yml
           parameters:
             # Changing the build name requires updating the referenced name in the source-build-sdk-diff-tests.yml pipeline

eng/pipelines/templates/variables/vmr-build.yml

@@ -12,6 +12,8 @@ variables:
   - name: VmrBranch
     value: ${{ replace(replace(variables['Build.SourceBranch'], 'refs/heads/', ''), 'refs/pull/', '') }}
 
+- name: almaLinuxContainer
+  value: mcr.microsoft.com/dotnet-buildtools/prereqs:almalinux-8-source-build
 - name: alpineContainer
   value: mcr.microsoft.com/dotnet-buildtools/prereqs:alpine-3.19-WithNode
 - name: centOSStreamContainer
@@ -43,6 +45,8 @@ variables:
 - name: wasiCrossContainer
   value: mcr.microsoft.com/dotnet-buildtools/prereqs:azurelinux-3.0-webassembly-amd64-net9.0
 
+- name: almaLinuxName
+  value: AlmaLinux8
 - name: alpineName
   value: Alpine319
 - name: centOSStreamName
@@ -52,6 +56,8 @@ variables:
 - name: ubuntuName
   value: Ubuntu2404
 
+- name: almaLinuxX64Rid
+  value: almalinux.8-x64
 - name: alpineX64Rid
   value: alpine.3.19-x64
 - name: centOSStreamX64Rid

src/SourceBuild/content/eng/pipelines/source-build-sdk-diff-tests.yml

@@ -49,6 +49,13 @@ jobs:
     includeArtifactsSize: true
     publishTestResultsPr: true
 
+- template: templates/jobs/sdk-diff-tests.yml
+  parameters:
+    buildName: ${{ format('{0}_Offline_MsftSdk', variables.almaLinuxName) }}
+    targetRid: ${{ variables.almaLinuxX64Rid }}
+    architecture: x64
+    dotnetDotnetRunId: ${{ parameters.dotnetDotnetRunId }}
+
 - template: templates/jobs/sdk-diff-tests.yml
   parameters:
     buildName: ${{ format('{0}_Online_MsftSdk', variables.alpineName) }}