How to define an external service in a docker compose yaml file?

[janvda]

Hi,

I would like to define the routing to an external service in my docker compose yaml file.
I don't know how to do this and if this is possible.

I know how to set this up in a yaml file for the dynamic configuration (using file provider) but then I cannot use environment variables (as this is not supported).

FYI. this is the external service I want to define the routing to based on specific public host name myservice.nuc123.onmypc.org.

  services:
    pi3one:
      loadBalancer:
        servers:
          - url: "http://192.168.1.131:1880"
        passHostHeader: true

[ldez]

Hello,

It's not possible, you have to use the file provider for that.

If you want to use env vars with the file provider, you can use Go templating and sprig functions.

[janvda]

See also follow up question How to use environment variables in the dynamic configuration (using file provider)?