Google Cloud Functions Public URL

Question

How to set public route to HTTP GCF? So, currently the default path something like this.

https://us-central1-poised-breaker-162819.cloudfunctions.net/function-1

But I want to use it in this way

https://myfunction.com

or

https://myfunction.com/thisroute

So actually it is the question of namespacing or even proxying of the requests to appropriate function. How this can be achieved?

Update 1

It seems, like we can use an Endpoints service for that. But it still unclear would it work with GCF or not.

Answer 1

Cloud Endpoints acts as an API gateway for cloud functions.

For Cloud function https://[CLOUD_FUNCTION_REGION].cloudfunctions.net/my-function,

1. Set project id in Cloud shell

   gcloud config set project [PROJECT_ID]
   

2. Deploy ESPv2 Beta to Cloud Run. Replace CLOUD_RUN_SERVICE_NAME with the name that you want to use for the service.

   gcloud run deploy CLOUD_RUN_SERVICE_NAME \
      --image="gcr.io/endpoints-release/endpoints-runtime-serverless:2" \
      --allow-unauthenticated \
      --platform managed
   

   At the end of command execution, it will have similar details as below

   Service [CLOUD_RUN_SERVICE_NAME] revision [CLOUD_RUN_SERVICE_NAME-00001-ces] has been deployed and is serving 100 percent of traffic at https://CLOUD_RUN_SERVICE_NAME-65zrpjcu3q-uk.a.run.app

   Note host-name receive from the above command (CLOUD_RUN_SERVICE_NAME-65zrpjcu3q-uk.a.run.app)

3. Create YAML file api.yaml with OpenAPI spec config:

     swagger: '2.0'
     info:
       title: Cloud Endpoints + GCF
       description: Sample API on Cloud Endpoints with a Google Cloud Functions backend
       version: 1.0.0
     host: CLOUD_RUN_SERVICE_NAME-65zrpjcu3q-uk.a.run.app
     schemes:
       - https
     produces:
       - application/json
     paths:
       /thisroute:
         get:
           summary: Custom function route
           x-google-backend:
             address: https://[CLOUD_FUNCTION_REGION].cloudfunctions.net/my-function
           responses:
             '200':
               description: A successful response
               schema:
                 type: string
   

4. Deploy Endpoint configuration:

   gcloud endpoints services deploy api.yaml
   

5. Now, Cloud function request can route through endpoint https://CLOUD_RUN_SERVICE_NAME-65zrpjcu3q-uk.a.run.app/thisroute.

6. Also to use custom domain name, need to verifying a domain name. For that follow steps from here