Adding Traefik StripPrefix middleware to docker-compose labels results in 504
There is an issue with prefix without ending with '/'. Test your config like this:
- "traefik.http.routers.whoami.rule=Host(`localhost`) && (PathPrefix(`//whoami/`) || PathPrefix(`/portainer`))" - "traefik.http.middlewares.strip-who.stripprefix.prefixes=/whoami"
I had a similar problem that was solved with the addition of
- "traefik.http.middlewares.strip-who.stripprefix.forceslash=true"
It makes sure the strip prefix doesn't also remove the forward slash.
You can read more about the forceslash documentation https://docs.traefik.io/middlewares/stripprefix/