Use the same Custom Domain for an App Service within the same scale unit behind an Application Gateway

Question

Use the same Custom Domain for an App Service within the same scale unit behind an Application Gateway

Sam Gooch 1

I need to add a custom domain to two App Services running on the same App Service Plan. In front of them both, sits an Application Gateway which the DNS is configured to route to.

The reason I need a custom domain is because the applications are expecting that custom domain to be present and it affects the routing and URL behaviour from the CMS application.

Please advise how best to do this?

Grmacjon-MSFT 19,151 Reputation points Moderator

2021-03-30T21:31:14.887+00:00

Hi @Sam Gooch ,

Just checking to see if the below response helped answer your question.

Thanks,

Grace
Sam Gooch 1 Reputation point

2021-03-31T14:52:22.863+00:00

In your diagram, what if the ImageServerPool and the VideoServerPool both need the domain to be contoso.com for it to route correctly? How would you do that? I can't use the *.azurewebsites.net domains.

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Grmacjon-MSFT 19,151 Reputation points Moderator

2021-03-30T21:31:14.887+00:00

Hi @Sam Gooch ,

Just checking to see if the below response helped answer your question.

Thanks,

Grace
Sam Gooch 1 Reputation point

2021-03-31T14:52:22.863+00:00

In your diagram, what if the ImageServerPool and the VideoServerPool both need the domain to be contoso.com for it to route correctly? How would you do that? I can't use the *.azurewebsites.net domains.

Answer 1

Grmacjon-MSFT 19,151 Moderator

Hi @Sam Gooch

Thanks for your patience.

Yes, your scenario can be achieved using URL path-based routing via Application Gateway. Please follow this tutorial:
Create an application gateway with path-based routing rules using the Azure portal.

Another option could be deploying your web apps to multiple virtual directories. Read this Blog post and SO post for more details.

Hope that helps.
-Grace

Narayan Guragain 1 Reputation point

2022-03-28T15:22:54.1+00:00

I want to have www.contoso.com/api1 and www.contoso.com/api2 in backend pool.
I have path-based routing set up in Application Gateway. Now I am stuck at authentication part.
Is it possible to authenticate each of them from Azure Active Directory?
Can I use the same custom domain for both web apps in the backend?
What would be best return url for each of them after authenticating requests from Azure Active directory?
Is that feasible at all?
Any suggestions/hints would be greatly appreciated.

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Use the same Custom Domain for an App Service within the same scale unit behind an Application Gateway

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