Redirecting favicon request to directory using ReplacePathRegex

Traefik version: 2.0.2
Providers: Docker

tl;dr: I am trying to redirect to

Hi folks, I have a Wekan container being served at (eg) via the label:

- "traefik.http.routers.rpg.rule=Host( && PathPrefix(/board/)"

So far so good. However, although Wekan supports being served from a directory as opposed to the webroot, doing so breaks the favicon.

I figured I could rewrite around that with ReplacePathRegex. However, no matter what I try for the regex, I cannot seem to to get one that works as intended.

For example:

# Fix favicon
      - "traefik.http.middlewares.fix-favicon.replacepathregex.regex=^/wekan-favicon.png"
      - "traefik.http.middlewares.fix-favicon.replacepathregex.replacement=/board/wekan-favicon.png"
      - "traefik.http.routers.wekan.middlewares=fix-favicon"

I have tried several variants, including the entire URL, but cannot hit upon the right regex. All I end up with is either a plain traefik 404, as if the middleware isn't applied or the regex isn't matched; though I can tell it is being applied as it affects the target URL ( which then returns a 404 via Wekan if I specify a lax enough regex.

The Problem: I think the problem is that obviously does not match the PathPrefix rule for that router, so it never gets a chance to hit the middleware I have set up.

Is there a way I can get around this? Could I create a router that matches Host=( and does not route to a service, but triggers a redirect on the path /wekan-favicon.png ?

I'm fairly inexperienced with traefik and still muddling through, so the way forward isn't obvious to me and some of my terminology may be off. If there's anything about the issue I can clarify please let me know, and thanks in advance :slight_smile: