Application gateway classic to Resource Manager migration

Article
10/02/2024

Resource Manager enables deploying complex applications through templates, configures virtual machines by using VM extensions, and incorporates access management and tagging. Azure Resource Manager includes scalable, parallel deployment for virtual machines into availability sets. The new deployment model also provides lifecycle management of compute, network, and storage independently. You can read more about Azure Resource Manager features and benefits.

Application gateway resources are not migrated automatically as part of VNet migration from classic to Resource Manager. As part of VNet migration process as documented at IaaS resources migration page, if you have an application gateway resource present on the VNet that you're trying to migrate to Resource Manager deployment model, the automatic migration wouldn't be successful.

To migrate your application gateway resource to Resource Manager deployment model, you'll have to remove the Application Resource from the VNet before beginning migration and then recreate the application gateway resource once migration is complete.

Creating a new application gateway resource

For more information on how to set up an application gateway resource after VNet migration, you can refer:

Common questions

What is Azure Service Manager and what does it mean by classic?

The word "classic" in classic networking service refers to networking resources managed by Azure Service Manager (ASM). Azure Service Manager (ASM) is the old control plane of Azure responsible for creating, managing, deleting VMs and performing other control plane operations.

Note

To view all the classic resources in your subscription, Open the All Resources blade and look for a (Classic) suffix after the resource name.

What is Azure Resource Manager?

Azure Resource Manager is the latest control plane of Azure responsible for creating, managing, deleting VMs and performing other control plane operations.

Where can I find more information regarding classic to Azure Resource Manager migration?

Refer to Frequently asked questions about classic to Azure Resource Manager migration

How can I clean up my classic application gateway deployment?

Step 1: Install the old PowerShell version for managing legacy resources.

Installing the Azure PowerShell Service Management module

Note

The cmdlets referenced in this documentation are for managing legacy Azure resources that use Azure Service Manager (ASM) APIs. This legacy PowerShell module isn't recommended for creating new resources since ASM is scheduled for retirement.

Step 2: Run the following command to remove the application gateway. Remove-AzureApplicationGateway

#Login to account and set proper subscription
 Add-AzureAccount
 Get-AzureSubscription
 Select-AzureSubscription -SubscriptionId <SubscriptionId> -Default

 # Get the list of application gateways in the subscription
 Get-AzureApplicationGateway

 #Remove the desired application gateway
 Remove-AzureApplicationGateway -Name <NameofGateway>

How do I report an issue?

Post your issues and questions about migration to our Microsoft Q&A page. We recommend posting all your questions on this forum. If you have a support contract, you're welcome to log a support ticket as well.

Next steps

To get started, see: platform-supported migration of IaaS resources from classic to Resource Manager

For any concerns around migration, you can contact Azure Support. Learn more about Azure support here.

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