java google-app-engine network-programming dns google-cloud-dns

How can i connect different Google App Engine Version urls to A different domain name?

When you upload a new version to app engine, let's call it '0001', you can send requests to this version directly using this url: http://0001.myapp.appspot.com

I find it very useful and I made an habit to release my web apps pointing to the corresponding server version. So when I upload version 0002 to the app engine it points to http://0002.myapp.appspot.com, the same goes to version 0003: http://0003.myapp.appspot.com.

My Challenge is that; when i want to link them to custom domains like;

Version 0001 to be linked to http://www.money.com.
Version 0002 to be linked to http://app.money.com.
And Version 0003 to be linked to http://www.facebook.com.

Instead it links the entire AppId "myapp" to "www.money.com". How do i point them to different domians?

Solution

What you're looking for is called "services" on App Engine (formerly known as modules). Each service can have own version, but you should use it only for development/testing purposes.

Basically your app config have <module> option:

<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
  <application>my-app</application>
  <module>mymodule</module>
  <version>0002</version>
</appengine-web-app>

You can have different modules deployed on same time, but mapped to different urls/domains by using dispatch.xml file:

<dispatch-entries>
  <dispatch>
      <url>app.money.com/</url>
      <module>mymodule</module>
  </dispatch>
</dispatch-entries>