Move Azure Event Grid custom topics to another region

Article
05/25/2021

You might want to move your resources to another region for a number of reasons. For example, to take advantage of a new Azure region, to meet internal policy and governance requirements, or in response to capacity planning requirements.

Here are the high-level steps covered in this article:

Export the custom topic resource to an Azure Resource Manager template.

Important

Only the custom topic is exported to the template. Any subscriptions for the topic aren't exported.
Use the template to deploy the custom topic to the target region.
Create subscriptions manually in the target region. When you exported the custom topic to a template in the current region, only the topic is exported. Subscriptions aren't included in the template, so create them manually after the custom topic is created in the target region.
Verify the deployment. Verify that the custom topic is created in the target region.
To complete the move, delete custom topic from the source region.

Prerequisites

Complete the Quickstart: Route custom events to web endpoint in the source region. Do this step so that you can test steps in this article.
Ensure that the Event Grid service is available in the target region. See Products available by region.

Prepare

To get started, export a Resource Manager template for the custom topic.

Sign in to the Azure portal.
In the search bar, type Event Grid topics, and select Event Grid Topics from the results list.
Select the topic that you want to export to a Resource Manager template.
On the Event Grid Topic page, select Export Template under Settings on the left menu, and then select Download on the toolbar.

Important

Only the topic is exported to the template. Subscriptions for the topic aren't exported. So, you need to create subscriptions for the topic after you move the topic to the target region.
Locate the .zip file you downloaded from the portal, and unzip that file to a folder of your choice. This zip file contains template and parameters JSON files.
Open the template.json in an editor of your choice.
Update location for the topic resource to the target region or location. To obtain location codes, see Azure locations. The code for a region is the region name with no spaces, for example, West US is equal to westus.
```
"type": "Microsoft.EventGrid/topics",
"apiVersion": "2020-06-01",
"name": "[parameters('topics_mytopic0130_name')]",
"location": "westus"
```
Save the template.

Recreate

Deploy the template to create a custom topic in the target region.

In the Azure portal, select Create a resource.
In Search the Marketplace, type template deployment, and then press ENTER.
Select Template deployment.
Select Create.
Select Build your own template in the editor.
Select Load file, and then follow the instructions to load the template.json file that you downloaded in the last section.
Select Save to save the template.
On the Custom deployment page, follow these steps:
1. Select an Azure subscription.
2. Select an existing resource group in the target region or create one.
3. For Region, select the target region. If you selected an existing resource group, this setting is read-only.
4. For the topic name, enter a new name for the topic.
5. Select Review + create at the bottom of the page.
6. On the Review + create page, review settings, and select Create.

Verify

After the deployment succeeds, select Go to resource.
Confirm that you see the Event Grid Topic page for the custom topic.
Follow steps in the Route custom events to a web endpoint to send events to the topic. Verify that the webhook event handler is invoked.

Discard or clean up

To complete the move, delete the custom topic in the source region.

If you want to start over, delete the topic in the target region, and repeat steps in the Prepare and Recreate sections of this article.

To delete a custom topic by using the Azure portal:

In the search window at the top of Azure portal, type Event Grid Topics, and select Event Grid Topics from search results.
Select the topic to delete, and select Delete from the toolbar.
On the confirmation page, enter the name of the resource group, and select Delete.

To delete the resource group that contains the custom topic by using the Azure portal:

In the search window at the top of Azure portal, type Resource groups, and select Resource groups from search results.
Select the resource group to delete, and select Delete from the toolbar.
On the confirmation page, enter the name of the resource group, and select Delete.

Next steps

You learned how to move an Event Grid custom topic from one region to another region. See the following articles for moving system topics, domains, and partner namespaces across regions.

To learn more about moving resources between regions and disaster recovery in Azure, see the following article: Move resources to a new resource group or subscription.

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