[in-proc] Fix sync trigger error when AzureWebjobsStorage is not set in Managed

release_notes.md

@@ -2,4 +2,5 @@
 
 <!-- Please add your release notes in the following format:
 - My change description (#PR)
--->
+-->
+- Allow sync trigger to happen in managed environment when `AzureWebJobsStorage` is not set (#11214)

src/WebJobs.Script.WebHost/Management/FunctionsSyncManager.cs

@@ -114,7 +114,7 @@ public async Task<SyncTriggersResult> TrySyncTriggersAsync(bool isBackgroundSync
                 PrepareSyncTriggers();
 
                 var hashBlobClient = await GetHashBlobAsync();
-                if (isBackgroundSync && hashBlobClient == null && !_environment.IsKubernetesManagedHosting())
+                if (isBackgroundSync && hashBlobClient == null && !_environment.IsAnyKubernetesEnvironment())
                 {
                     // short circuit before doing any work in background sync
                     // cases where we need to check/update hash but don't have
@@ -135,7 +135,7 @@ public async Task<SyncTriggersResult> TrySyncTriggersAsync(bool isBackgroundSync
 
                 bool shouldSyncTriggers = true;
                 string newHash = null;
-                if (isBackgroundSync && !_environment.IsKubernetesManagedHosting())
+                if (isBackgroundSync && hashBlobClient != null)
                 {
                     newHash = await CheckHashAsync(hashBlobClient, payload.Content);
                     shouldSyncTriggers = newHash != null;

test/WebJobs.Script.Tests.Integration/Management/FunctionsSyncManagerTests.cs

@@ -299,6 +299,62 @@ public async Task TrySyncTriggers_LocalEnvironment_ReturnsFalse()
             }
         }
 
+        [Fact]
+        public async Task TrySyncTriggers_ManagedAppEnv_WithNo_AzureWebJobsStorage_ReturnsTrue()
+        {
+            _vars.Add("AzureWebJobsStorage", null);
+            _mockEnvironment.Setup(p => p.GetEnvironmentVariable(EnvironmentSettingNames.AzureWebsiteArmCacheEnabled)).Returns("0");
+
+            using (var env = new TestScopedEnvironmentVariable(_vars))
+            {
+                _mockEnvironment.Setup(p => p.GetEnvironmentVariable(EnvironmentSettingNames.ManagedEnvironment)).Returns("true");
+                _mockEnvironment.Setup(p => p.GetEnvironmentVariable("FUNCTIONS_API_SERVER")).Returns("https://appname.azurewebsites.net");
+                _mockEnvironment.Setup(p => p.GetEnvironmentVariable("CONTAINER_APP_NAME")).Returns("appname");
+                _mockEnvironment.Setup(p => p.GetEnvironmentVariable("CONTAINER_APP_NAMESPACE")).Returns("appns");
+                _mockEnvironment.Setup(p => p.GetEnvironmentVariable("CONTAINER_APP_REVISION")).Returns("appname--r1");
+
+                // _functionsSyncManager is initialized in the constructor with all the secrets from environment,
+                // so HostAzureBlobStorageProvider will have AzureWebJobsStorage defined in both ActiveHostConfigurationSource
+                // and the WebHost IConfiguration source from DI.
+                // The TestScopedEnvironmentVariable only changes the WebHost level IConfiguration
+                // When it is set to empty/null, the connection string from the ActiveHostConfigurationSource wins (never changed since it is set in
+                // constructor as mentioned).
+                // Therefore, we need to force refresh the configuration with an ActiveHostChanged event. This is because setting an empty/null environment variable
+                // removes it, but will not remove it from the ActiveHostConfigurationSource.
+                _scriptHostManager.OnActiveHostChanged();
+                var result = await _functionsSyncManager.TrySyncTriggersAsync(isBackgroundSync: true);
+                Assert.True(result.Success);
+                VerifyResultWithCacheOff(durableVersion: "V1");
+            }
+        }
+
+        [Fact]
+        public async Task TrySyncTriggers_KubernetesManagedEnv_WithNo_AzureWebJobsStorage_ReturnsTrue()
+        {
+            _vars.Add("AzureWebJobsStorage", null);
+            _mockEnvironment.Setup(p => p.GetEnvironmentVariable(EnvironmentSettingNames.AzureWebsiteArmCacheEnabled)).Returns("0");
+
+            using (var env = new TestScopedEnvironmentVariable(_vars))
+            {
+                _mockEnvironment.Setup(p => p.GetEnvironmentVariable("FUNCTIONS_API_SERVER")).Returns("https://appname.azurewebsites.net");
+                _mockEnvironment.Setup(p => p.GetEnvironmentVariable("KUBERNETES_SERVICE_HOST")).Returns("kubhost");
+                _mockEnvironment.Setup(p => p.GetEnvironmentVariable("POD_NAMESPACE")).Returns("podns");
+
+                // _functionsSyncManager is initialized in the constructor with all the secrets from environment,
+                // so HostAzureBlobStorageProvider will have AzureWebJobsStorage defined in both ActiveHostConfigurationSource
+                // and the WebHost IConfiguration source from DI.
+                // The TestScopedEnvironmentVariable only changes the WebHost level IConfiguration
+                // When it is set to empty/null, the connection string from the ActiveHostConfigurationSource wins (never changed since it is set in
+                // constructor as mentioned).
+                // Therefore, we need to force refresh the configuration with an ActiveHostChanged event. This is because setting an empty/null environment variable
+                // removes it, but will not remove it from the ActiveHostConfigurationSource.
+                _scriptHostManager.OnActiveHostChanged();
+                var result = await _functionsSyncManager.TrySyncTriggersAsync(isBackgroundSync: true);
+                Assert.True(result.Success);
+                VerifyResultWithCacheOff(durableVersion: "V1");
+            }
+        }
+
         [Fact]
         public void ArmCacheEnabled_VerifyDefault()
         {
@@ -1147,4 +1203,4 @@ public void Reset()
             }
         }
     }
-}
+}