Can't serve content, 404 error

Traefik Traefik v2
#1

I'm trying to put Gogs behind a reverse proxy using Traefik and Docker. I've swapped out the sensitive information.

docker-compose.yml

version: "3.9"
services:
  gogs:
    image: gogs/gogs
    #ports:
    #  - "10880:3000"
    expose:
      - 3000
    restart: unless-stopped
    volumes:
      - ./gogs/data:/data
    labels:
      - "traefik.http.routers.gogs.rule=Host(`internal.example.com`) && Path(`/gogs`)"
      - "traefik.http.routers.gogs.tls=true"
      - "traefik.http.services.gogs.loadbalancer.server.port=3000"
      #- "traefik.http.routers.gogs.entrypoints=websecure"
      - "traefik.http.routers.gogs.tls.certresolver=le"
  traefik:
    image: traefik:v2.6
    ports:
      - "80:80"
      - "443:443"
    restart: unless-stopped
    labels:
      # Dashboard
      - "traefik.http.routers.traefik.rule=Host(`internal.example.com`)"
      - "traefik.http.routers.traefik.service=api@internal"
      - "traefik.http.routers.traefik.middlewares=admin"
      - "traefik.http.routers.traefik.tls.certresolver=le"
      - "traefik.http.routers.traefik.entrypoints=websecure"
      - "traefik.http.middlewares.admin.basicauth.users=admin:XXX"
    
    command:
      - --entrypoints.web.address=:80
      - --entrypoints.websecure.address=:443
      - --providers.docker
      - --api
      - --certificatesresolvers.le.acme.email=me@example.com
      - --certificatesresolvers.le.acme.storage=/acme.json
      - --certificatesresolvers.le.acme.tlschallenge=true
      
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - ./traefik/acme.json:/acme.json

Going to the Traefik dashboard works fine, there are no errors shown. Trying to go to Gogs at [ https://internal.example.com/gogs redirects to the Gogs login at [ https://internal.example.com/gogs/user/login as it should, but only gives a "404 page not found" error.

I'm totally at a loss of what to do from here.

#2

Try using PathPrefix instead of Path.

Path matches exactly. Right now you're likely getting the redirect from the landing page but no route matches /gogs/user/login .

#3

I think it was a slight improvement, but I'm not out of the woods. I'm now getting a fancier 404 message. Rather than a plain text message, I'm getting a more formal "No webpage was found for the web address" message.

#4

Which would indicate you're getting the 404 from the backend service.

If the service is not serving on /gogs path then you're likely going to use stripPrefix middleware with the router. Sometimes it is enough to update configuration for the service itself to run behind a rev proxy with a path prefix.

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