Specify domain with port/ingress definition

[raphaeltm]

At the moment we specify domains with the domainname field in a service definition.

I would prefer to specify the domain in the port list. Something along the lines of:

services:
  web:
    # [...]
    ports:
      - target: 3000
        mode: ingress
        host: mydomain.com

While less common, this provides the ability to specify multiple domains for a service (i.e. with an admin endpoint and a public endpoint):

services:
  twoEndpointService:
    # [...]
    ports:
      # public endpoint
      - target: 3000
        mode: ingress
        host: mydomain.com
      # public endpoint
      - target: 3003
        mode: ingress
        host: admin.mydomain.com

I think it also just feels more appropriate to define the domain along with the port. They're intrinsically tied together, so their configuration should reflect that.

[lionello]

The spec has no such option though: https://github.com/compose-spec/compose-spec/blob/master/05-services.md#long-syntax-3

[raphaeltm]

The spec has no such option though: https://github.com/compose-spec/compose-spec/blob/master/05-services.md#long-syntax-3

@edwardrf said he could find a way to make it happen 😁

I'm guessing it would look more like:

services:
  twoEndpointService:
    # [...]
    ports:
      # public endpoint
      - target: 3000
        mode: ingress
        x-host: mydomain.com
      # public endpoint
      - target: 3003
        mode: ingress
        x-host: admin.mydomain.com