API to register domain, add SSL certificate for Google App Engine app

Question

we are looking for an API to programmatically register new domains and upload corresponding SSL certificates for an existing Google App Engine application. Background: we would like to offer a DNS-based reverse proxy for our GAE-based service, where our customers can access our application through a domain they own. Once can easily configure new domain names (SNI) manually and upload a matching SSL certificate. In order to automate the process and also limit our exposure to customer-owned SSL certificates, we would like to automate the process.

I have been browsing Google's Management API for Google App Engine ( https://cloud.google.com/appengine/docs/admin-api/reference/rpc/google.appengine.v1 ), but could not find a way to accomplish the aforementioned functionality through that API. Does such an API exist?

Thanks, Soeren

Answer 1

Currently there is no support for this.

There is a feature request for this, created on Nov 13, 2015, which is also addresses Let's Encrypt support.

And there is a hint in it – that somewhere in the wild already exists alpha for "App Engine Admin API - Custom Domains & SSL Certificates"

You can star or comment on this feature request here: https://issuetracker.google.com/issues/35900034

Answer 2

It looks like this isn't supported right now. This might be because of the domain verification process; you can find out more about what serving SSL on a custom domain on App Engine looks like here .