[Az.RecoveryServices.Backup] hot fix for cross subscription restore (Azure#18238)

* hot fix for cross subscription restore

* Re-recorded the failed test

Author: hiaga

src/RecoveryServices/RecoveryServices.Backup.Providers/Providers/IaasVmPsBackupProvider.cs

@@ -443,11 +443,13 @@ public RestAzureNS.AzureOperationResponse TriggerRestore()
             string targetVNetResourceGroup = (string)ProviderData[RestoreVMBackupItemParams.TargetVNetResourceGroup];
             string targetSubnetName = (string)ProviderData[RestoreVMBackupItemParams.TargetSubnetName];
             string targetSubscriptionId = (string)ProviderData[RestoreVMBackupItemParams.TargetSubscriptionId];
-
+            
             Dictionary<UriEnums, string> uriDict = HelperUtils.ParseUri(rp.Id);
             string containerUri = HelperUtils.GetContainerUri(uriDict, rp.Id);
 
-            GenericResource storageAccountResource = ServiceClientAdapter.GetStorageAccountResource(storageAccountName);
+            if (targetSubscriptionId == null || targetSubscriptionId == "") targetSubscriptionId = ServiceClientAdapter.SubscriptionId;
+
+            GenericResource storageAccountResource = ServiceClientAdapter.GetStorageAccountResource(storageAccountName, targetSubscriptionId);
 
             var useOsa = ShouldUseOsa(rp, osaOption);
 
@@ -496,7 +498,7 @@ public RestAzureNS.AzureOperationResponse TriggerRestore()
                 {
                     identityInfo = new IdentityInfo();
                     if (useSystemAssignedIdentity)
-                    {   
+                    {
                         identityInfo.IsSystemAssignedIdentity = true;
                     }
                     else
@@ -511,12 +513,10 @@ public RestAzureNS.AzureOperationResponse TriggerRestore()
                 }
                 else
                 {
-                    throw new NotSupportedException(Resources.MSIRestoreNotSupportedForUnmanagedVM);                    
+                    throw new NotSupportedException(Resources.MSIRestoreNotSupportedForUnmanagedVM);
                 }
             }
-            
-            string targetSubscription = (targetSubscriptionId != null && targetSubscriptionId != "") ? targetSubscriptionId : ServiceClientAdapter.SubscriptionId;
-            
+
             IaasVMRestoreRequest restoreRequest = new IaasVMRestoreRequest()
             {
                 CreateNewCloudService = false,
@@ -525,7 +525,7 @@ public RestAzureNS.AzureOperationResponse TriggerRestore()
                 Region = vaultLocation ?? ServiceClientAdapter.BmsAdapter.GetResourceLocation(),
                 StorageAccountId = storageAccountResource.Id,
                 SourceResourceId = rp.SourceResourceId,
-                TargetResourceGroupId = targetResourceGroupName != null ? "/subscriptions/" + targetSubscription + "/resourceGroups/" + targetResourceGroupName : null,
+                TargetResourceGroupId = targetResourceGroupName != null ? "/subscriptions/" + targetSubscriptionId + "/resourceGroups/" + targetResourceGroupName : null,
                 OriginalStorageAccountOption = useOsa,
                 RestoreDiskLunList = restoreDiskLUNS,
                 DiskEncryptionSetId = DiskEncryptionSetId,
@@ -562,8 +562,8 @@ public RestAzureNS.AzureOperationResponse TriggerRestore()
                 }
 
                 restoreRequest.RecoveryType = RecoveryType.AlternateLocation;
-                restoreRequest.TargetVirtualMachineId = "/subscriptions/" + targetSubscription + "/resourceGroups/" + targetResourceGroupName + "/providers/Microsoft.Compute/virtualMachines/" + targetVMName;
-                restoreRequest.VirtualNetworkId = "/subscriptions/" + targetSubscription + "/resourceGroups/" + targetVNetResourceGroup + "/providers/Microsoft.Network/virtualNetworks/" + targetVNetName;
+                restoreRequest.TargetVirtualMachineId = "/subscriptions/" + targetSubscriptionId + "/resourceGroups/" + targetResourceGroupName + "/providers/Microsoft.Compute/virtualMachines/" + targetVMName;
+                restoreRequest.VirtualNetworkId = "/subscriptions/" + targetSubscriptionId + "/resourceGroups/" + targetVNetResourceGroup + "/providers/Microsoft.Network/virtualNetworks/" + targetVNetName;
                 restoreRequest.SubnetId = restoreRequest.VirtualNetworkId + "/subnets/" + targetSubnetName;
             }
 

src/RecoveryServices/RecoveryServices.Backup.ServiceClientAdapter/RMAPIs/ResourceAPIs.cs

@@ -43,14 +43,19 @@ public GenericResource GetAzureResource(string resourceId)
         /// </summary>
         /// <param name="storageAccountName">Name of the container to unregister</param>
         /// <returns>Generic resource returned from the service</returns>
-        public GenericResource GetStorageAccountResource(string storageAccountName)
+        public GenericResource GetStorageAccountResource(string storageAccountName, string subscriptionId = null)
         {
             List<GenericResource> storageAccounts = null;
             GenericResource storageAccount = null;
             storageAccountName = storageAccountName.ToLower();
             ODataQuery<GenericResourceFilter> getItemQueryParams =
                 new ODataQuery<GenericResourceFilter>(q =>
                 q.ResourceType == "Microsoft.ClassicStorage/storageAccounts");
+
+            // switch subscription context 
+            string subscriptionContext = RMAdapter.Client.SubscriptionId;
+            RMAdapter.Client.SubscriptionId = (subscriptionId != null)? subscriptionId: RMAdapter.Client.SubscriptionId;
+
             Func<RestAzureNS.IPage<GenericResource>> listAsync =
             () => RMAdapter.Client.Resources.ListWithHttpMessagesAsync(
                 getItemQueryParams,
@@ -81,6 +86,9 @@ public GenericResource GetStorageAccountResource(string storageAccountName)
                 storageAccount = storageAccounts.Find(account =>
                     string.Compare(account.Name, storageAccountName) == 0);
             }
+
+            RMAdapter.Client.SubscriptionId = subscriptionContext;
+
             return storageAccount;
         }
     }

src/RecoveryServices/RecoveryServices.Backup.Test/SessionRecords/Microsoft.Azure.Commands.RecoveryServices.Backup.Test.ScenarioTests.ItemTests/TestAzureFSFullRestore.json

@@ -19,7 +19,7 @@
 -->
 ## Upcoming Release
 * Added support for Multi-user authorization using Resource Guard for recovery sevrices vault.
-* Added support for cross subscription restore for recovery services vault.
+* Added support for cross subscription restore for recovery services vault, modified storage account to be fetched from target subscription.
 
 ## Version 5.3.1
 * Added support for multiple backups per day (hourly) Enhanced policy for workloadType AzureVM.