I have a site running through google app engine on runtime environment php 5.5. I am trying to deploy a new version of the app (I do this by changing the version number in app.yaml, reference here: Configuring with app.yaml) and deploying the app.
My current site can be reached via www.my-app-name.appspot.com (which works fine) and I should be able to view my new app version at www.2-dot-my-app-name.appspot.com, however I get a 404 error when trying to view version 2.
Version 1 and version 2 of my app are identical, the only difference being that version 2 has "2" as the version in app.yaml. Did I miss a step here? Is there something I need to do as far as configuration goes to view version 2? (Note: I do not want to make version 2 live, I just want to deploy it and test it to see if some changes work before making it live).
Edit: I tried testing to see what routing all traffic to version 2 of my app would do. In this case, version 2 of the app works but version 1 does not. It looks like when all traffic is routed to a particular version, that version is served up with the url "myappname.appspot.com". Any other versions are served using the url "version-dot-myappname.appspot.com". Anyone know how I can configure my app so that these urls work?
I discovered what the culprit was. I had a PHP configuration file that changed the header location to 'http://www.'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']. Though this type of configuration will work for your default app, it will not work when testing a new version because when testing a new version the routing cannot contain the leading 'www'. Hope this helps someone else down the line who encounters the same problem.
Note: If you use traffic splitting, users will not have any issues accessing your new version as long as your custom domain is mapped correctly.
According to the Routing via URL doc the address for your new app version should be 2-dot-my-app-name.appspot.com, without the leading www.:
https://version-dot-app-id.appspot.com http://version.app-id.my-custom-domain.com Sends the request to an available instance of the given version of the default module.