CODEWITHSUNDEEP
azureazure-web-app-serviceazure-application-gateway
Mike
Mike

Reputation: 1738

Application Gateway Url Routing to multiple App Services

I have several app services that I want to use application gateway to sit in front of and route traffic to using URL Routing. For example:

  1. api1-app-service
  2. api2-app-service
  3. website1-app-service

I would like to use the Application Gateway with a custom domain in front of it, and route the traffic like this:

  1. test.app.com/api/something -> api1-app-service
  2. test.app.com/api/different -> api2-app-service
  3. test.app.com/ -> website1-app-service

I setup 3 different backend pools and a url routing rule that looks like this: 

rule1 | /api/something* | backendPool1 
rule2 | /api/different* | backendPool2 
default rule | backendPool3

The problem I am having is that the direction here (https://blogs.msdn.microsoft.com/waws/2017/11/21/setting-up-application-gateway-with-an-app-service-that-uses-azure-active-directory-authentication/) says that the app service has to be setup with the custom domain that you are pointing to the application gateway (test.app.com in my example), but I can't configure test.app.com to go to multiple app services. I get an error that the hostname is already mapped to another app service (which is true, when trying to map to api2-app-service test.app.com is configured to api1-app-service). Is is possible to setup an application gateway in front of multiple app services?

Upvotes: 2

Views: 3905

Answers (2)

Nancy Xiong
Nancy Xiong

Reputation: 28204

It's possible to setup an application gateway in front of multiple app services.

If you want custom domains with your web app service, you could configure different custom domains in different App services. Probably, if you'd like to use the same custom domain, you could deploy multiple Applications in the same web app service with different virtual paths.

If you do not want custom domains in multiple App Services, you could use the default hostname *.azurewebsites.net. If so, the Application Gateway frontend will direct the client request to different backend pools based on the different routing rules. You could configure for the backend HTTP setting using -PickHostNameFromBackendAddress.

Ref: Hosting multiple sites in one Azure WebApp and create an application gateway with path-based routing rules.

Upvotes: 1

Mike
Mike

Reputation: 1738

After researching all day, I am fairly sure this isn't possible using just an Application Gateway and app services. I am going to containerize my app and then use the application gateway and see if that does what I want it to.

Upvotes: 1

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