Fix Instance Manager for Linux Consumption Running on Legion (#11072)

* Fix Instance Manager for Linux Consumption Running on Legion

* unit test

* Release note

---------

Co-authored-by: Tony Choi <[email protected]>

Author: Tonewall

release_notes.md

@@ -2,4 +2,4 @@
 
 <!-- Please add your release notes in the following format:
 - My change description (#PR)
-- Disable Diagnostic Events when Table Storage is not accessible (#10996)
+- Disable Diagnostic Events when Table Storage is not accessible (#10996)

src/WebJobs.Script.WebHost/WebHostServiceCollectionExtensions.cs

@@ -145,7 +145,7 @@ public static void AddWebJobsScriptHost(this IServiceCollection services, IConfi
             services.AddTransient<VirtualFileSystem>();
             services.AddTransient<VirtualFileSystemMiddleware>();
 
-            if (SystemEnvironment.Instance.IsFlexConsumptionSku())
+            if (SystemEnvironment.Instance.IsLinuxConsumptionOnLegion() || SystemEnvironment.Instance.IsFlexConsumptionSku())
             {
                 services.AddSingleton<IInstanceManager, LegionInstanceManager>();
             }

test/WebJobs.Script.Tests/Environment/EnvironmentTests.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Runtime.InteropServices;
+using System.Threading.Tasks;
 using Microsoft.WebJobs.Script.Tests;
 using Xunit;
 using static Microsoft.Azure.WebJobs.Script.EnvironmentSettingNames;
@@ -244,6 +245,24 @@ public void Returns_IsLinuxConsumption(string websiteInstanceId, string containe
             Assert.False(isLinuxConsumptionOnAtlas ? isLinuxConsumptionOnLegion : isLinuxConsumptionOnAtlas);
         }
 
+        [Theory]
+        [InlineData(ScriptConstants.DynamicSku, "containerName", "", "", false)]
+        [InlineData(ScriptConstants.DynamicSku, "containerName", "podName", "", false)]
+        [InlineData(ScriptConstants.DynamicSku, "containerName", "podName", "legionServiceHost", true)]
+        [InlineData(ScriptConstants.DynamicSku, "containerName", "", "legionServiceHost", true)]
+        public void Returns_AtlasOrLegionConsumption(string sku, string containerName, string podName, string legionServiceHost, bool legion)
+        {
+            var testEnvironment = new TestEnvironment();
+            testEnvironment.SetEnvironmentVariable(EnvironmentSettingNames.AzureWebsiteInstanceId, string.Empty);
+            testEnvironment.SetEnvironmentVariable(EnvironmentSettingNames.AzureWebsiteSku, sku);
+            testEnvironment.SetEnvironmentVariable(EnvironmentSettingNames.ContainerName, containerName);
+            testEnvironment.SetEnvironmentVariable(EnvironmentSettingNames.PodName, podName);
+            testEnvironment.SetEnvironmentVariable(EnvironmentSettingNames.LegionServiceHost, legionServiceHost);
+
+            Assert.Equal(legion, testEnvironment.IsLinuxConsumptionOnLegion());
+            Assert.Equal(!legion, testEnvironment.IsLinuxConsumptionOnAtlas());
+        }
+
         [Theory]
         [InlineData(ScriptConstants.ElasticPremiumSku, true)]
         [InlineData("test", false)]