Add the app's default labels to the traefik container

[anoldguy]

Add the same service/destination labels used by the app containers to the traefik containers.

I'm sure there's a better way to do this.

I'm also sure there's a reason why we don't want to do this, in case traefik ends up fronting several app backends at once? I don't know if there's work to support that, but IIRC, there was talk about deploying everything on a single box, which could require traefik supporting multiple backends.

In any case, I'd love to discuss this concept, as we have a need to get log data from traefik tagged with these values. The app containers already have these values, but traefik does not.

The admittedly simple alternative is to just drop this into config/deploy.yml:

traefik:
  labels:
    service: app_name # like 'bcc'

and then in each destination config:

traefik:
  labels:
    destination: staging | production | whatever

test/integration/app_test.rb is failing, but all other tests are passing. I'm not sure it's not something in my env.

[djmb]

It's possible to run multiple services on a single VM, but they'll all share the same Traefik instance.

This is a bit messy - the Traefik config will be based on whichever project you run the last traefik reboot from.

Given that I think its best not to automatically apply the labels - with multiple services they could be misleading. Your suggestion to add them manually to the config sounds like the best plan 👍