google app engine - AppEngine subdomains to modules without wildcard mapping

Question

I want to have 2 custom subdomains mapped to different modules of my AppEngine app, i.e.:

a.my-domain.com -> default module
b.my-domain.com -> module-b

My dispatch.yaml looks like this:

dispatch:
  - url: "a.my-domain.com/*"
    module: default

  - url: "b.my-domain.com/*"
    module: module-b

and I both subdomains added to this app AppEngine custom domains and CNAME setup correctly.

The problem is hitting both a.my-domain.com and b.my-domain.com resolves to default module.

I haven't tried to do top-level wildcard mapping, i.e. *.my-domain.com to this app since I already have other subdomains mapped to another app.

Is this setup even possible at all with AppEngine?

Answer 1

Waitting for answers