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Custom roles for SQL Server to Azure Virtual Machines migrations using ADS

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This article explains how to set up a custom role in Azure for SQL Server database migrations. The custom role only has the permissions necessary to create and run an instance of Azure Database Migration Service with Azure Virtual Machine as a target.

Use the AssignableScopes section of the role definition JSON string to control where the permissions appear in the Add role assignment UI in the Azure portal. To avoid cluttering the UI with extra roles, you might want to define the role at the level of the resource group, or even the level of the resource. The resource that the custom role applies to doesn't perform the actual role assignment.

{
    "properties": {
        "roleName": "DmsCustomRoleDemoForVM",
        "description": "",
        "assignableScopes": [
            "/subscriptions/<storageSubscription>/resourceGroups/<storageAccountRG>",
            "/subscriptions/<ManagedInstanceSubscription>/resourceGroups/<virtualMachineRG>",
            "/subscriptions/<DMSSubscription>/resourceGroups/<dmsServiceRG>"
        ],
        "permissions": [
            {
                "actions": [
                    "Microsoft.Storage/storageAccounts/read",
                    "Microsoft.Storage/storageAccounts/listkeys/action",
                    "Microsoft.Storage/storageAccounts/blobServices/read",
                    "Microsoft.Storage/storageAccounts/blobServices/write",
                    "Microsoft.Storage/storageAccounts/blobServices/containers/read",
                    "Microsoft.SqlVirtualMachine/sqlVirtualMachines/read",
                    "Microsoft.SqlVirtualMachine/sqlVirtualMachines/write",
                    "Microsoft.DataMigration/locations/operationResults/read",
                    "Microsoft.DataMigration/locations/operationStatuses/read",
                    "Microsoft.DataMigration/locations/sqlMigrationServiceOperationResults/read",
                    "Microsoft.DataMigration/databaseMigrations/write",
                    "Microsoft.DataMigration/databaseMigrations/read",
                    "Microsoft.DataMigration/databaseMigrations/delete",
                    "Microsoft.DataMigration/databaseMigrations/cancel/action",
                    "Microsoft.DataMigration/databaseMigrations/cutover/action",
                    "Microsoft.DataMigration/sqlMigrationServices/write",
                    "Microsoft.DataMigration/sqlMigrationServices/delete",
                    "Microsoft.DataMigration/sqlMigrationServices/read",
                    "Microsoft.DataMigration/sqlMigrationServices/listAuthKeys/action",
                    "Microsoft.DataMigration/sqlMigrationServices/regenerateAuthKeys/action",
                    "Microsoft.DataMigration/sqlMigrationServices/deleteNode/action",
                    "Microsoft.DataMigration/sqlMigrationServices/listMonitoringData/action",
                    "Microsoft.DataMigration/sqlMigrationServices/listMigrations/read",
                    "Microsoft.DataMigration/sqlMigrationServices/MonitoringData/read"
                ],
                "notActions": [],
                "dataActions": [],
                "notDataActions": []
            }
        ]
    }
}

You can use either the Azure portal, Azure PowerShell, Azure CLI, or Azure REST API to create the roles.

For more information, see Create or update Azure custom roles using the Azure portal and Azure custom roles.

Description of permissions needed to migrate to a virtual machine

Permission Action Description
Microsoft.Storage/storageAccounts/read Returns the list of storage accounts or gets the properties for the specified storage account.
Microsoft.Storage/storageAccounts/listkeys/action Returns the access keys for the specified storage account.
Microsoft.Storage/storageAccounts/blobServices/read List blob services.
Microsoft.Storage/storageAccounts/blobServices/write Returns the result of put blob service properties.
Microsoft.Storage/storageAccounts/blobServices/containers/read Returns list of containers.
Microsoft.Sql/managedInstances/read Return the list of managed instances or gets the properties for the specified managed instance.
Microsoft.Sql/managedInstances/write Creates a managed instance with the specified parameters or update the properties or tags for the specified managed instance.
Microsoft.Sql/managedInstances/databases/read Gets existing managed database.
Microsoft.Sql/managedInstances/databases/write Creates a new database or updates an existing database.
Microsoft.Sql/managedInstances/databases/delete Deletes an existing managed database.
Microsoft.DataMigration/locations/operationResults/read Get the status of a long-running operation related to a 202 Accepted response.
Microsoft.DataMigration/locations/operationStatuses/read Get the status of a long-running operation related to a 202 Accepted response.
Microsoft.DataMigration/locations/sqlMigrationServiceOperationResults/read Retrieve Service Operation Results.
Microsoft.DataMigration/databaseMigrations/write Create or Update Database Migration resource.
Microsoft.DataMigration/databaseMigrations/read Retrieve the Database Migration resource.
Microsoft.DataMigration/databaseMigrations/delete Delete Database Migration resource.
Microsoft.DataMigration/databaseMigrations/cancel/action Stop ongoing migration for the database.
Microsoft.DataMigration/databaseMigrations/cutover/action Cutover online migration operation for the database.
Microsoft.DataMigration/sqlMigrationServices/write Create a new or change properties of existing Service
Microsoft.DataMigration/sqlMigrationServices/delete Delete existing Service.
Microsoft.DataMigration/sqlMigrationServices/read Retrieve details of Migration Service.
Microsoft.DataMigration/sqlMigrationServices/listAuthKeys/action Retrieve the List of Authentication Keys.
Microsoft.DataMigration/sqlMigrationServices/regenerateAuthKeys/action Regenerate the Authentication Keys.
Microsoft.DataMigration/sqlMigrationServices/deleteNode/action De-register the IR node.
Microsoft.DataMigration/sqlMigrationServices/listMonitoringData/action Lists the Monitoring Data for all migrations.
Microsoft.DataMigration/sqlMigrationServices/listMigrations/read Lists the migrations for the user.
Microsoft.DataMigration/sqlMigrationServices/MonitoringData/read Retrieve the Monitoring Data.
Microsoft.SqlVirtualMachine/sqlVirtualMachines/read Retrieve details of SQL virtual machine.
Microsoft.SqlVirtualMachine/sqlVirtualMachines/write Create a new or change properties of existing SQL virtual machine.

You can get a sample script to create a login and provision it with the necessary permissions, for VMware, Hyper-V, or physical servers, using Windows authentication or SQL Server authentication.

Role assignment

To assign a role to a user or an app ID:

  1. In the Azure portal, go to the resource.

  2. In the left menu, select Access control (IAM), and then scroll to find the custom roles you created.

  3. Select the roles to assign, select the user or app ID, and then save the changes.

    The user or app ID now appears on the Role assignments tab.

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