Google Cloud (API GATEWAY) Custom Domain

Question

I am currently building a rest api, for this I am using Google Cloud API Gateway and Google Cloud Run. I've been looking at all the google cloud documentation and researching elsewhere and I can't find how to add a custom domain to an API gateway instance. The funny thing is that there is more documentation for Google Cloud endpoints, I could find how to do it with endpoints but it does not apply to my use case.

I have 10 instances of google cloud run each one running a microservice respectively and I want to join everything in a single domain and add support with openapi, but I have failed in the attempt.

In any case, if someone has managed to customize the domain of an api gateway instance, I would appreciate if you could guide me, greetings.

Answer 1

For the beta release, custom domain names are not supported on GCP for API Gateway. Since it is still beta as of today, if you want to use a custom domain, you could use Cloud Endpoints in Cloud Run or you could even look into using Microservices in App Engine.

Answer 2

It is now possible to use custom domain with API Gateway. Feature is available in pre-GA as of May 2023.

You can set custom audiences on a service using the following command:

gcloud beta run services update SERVICE --add-custom-audiences=AUDIENCE

Replace

SERVICE with the name of your Cloud Run service

AUDIENCE with a string for the custom audience you want to support, for example example.com

Verifying custom audiences:

export TOKEN=$(gcloud auth print-identity-token --impersonate-service-account SERVICE_ACCOUNT_EMAIL --audiences='AUDIENCE')

Please find it here: https://cloud.google.com/run/docs/configuring/custom-audiences

It was made available in response to this issue: https://issuetracker.google.com/issues/181220765