`WHOAMI_PORT_NUMBER` has no effect

[chris-aeviator]

running

version 3
services:
  fake-service:
    image: traefik/whoami
    environment:
      - 'WHOAMI_PORT_NUMBER=3993'

will still bring up

fake-service_1        | Starting up on port 80

[Ludovic Fernandez]

Hello,

I think it's because you are not using the right version, I recommend using an explicit version because the management of the latest tag (no tag means latest) by Docker can be surprising.

version: '3.7'

services:
  fake-service:
    image: traefik/whoami:v1.7.1
    environment:
      - 'WHOAMI_PORT_NUMBER=3993'

$ docker-compose up
issue-traefik-fake-service-1  | 2022/01/08 14:00:18 Starting up on port 3993