Unable to route to my API backend

Traefik Traefik v2
1

Hello,

I had two container frontend (nginx :80) and backend (nodejs :3000).
I'm trying to redirect all path to my frontend : localhost/* ---> frontend
Except one path to my backend API : localhost/v1/* ---> backend

I secure my database container (mongodb) by allowing only communication with my backend

Here is my docker-compose.yml (I'm only using this)

version: '3'

services:
  traefik:
    image: traefik:v2.3
    container_name: traefik
    command:
      - --api.insecure=true
      - --providers.docker=true
      - --providers.docker.exposedbydefault=false
      - --entrypoints.web.address=:80
    ports:
      - "8080:8080"
      - "443:443"
      - "80:80"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro

  frontend:
    image: registry.gitlab.com/test/frontend
    container_name: frontend
    build:
      context: ../frontend/.
    labels:
      - traefik.enable=true
      - traefik.http.routers.frontend.rule=PathPrefix(`/`)
      - traefik.http.routers.frontend.entrypoints=web    
    networks:
      - traefik-network

  backend:
    image: registry.gitlab.com/test/backend
    container_name: backend
    build:
      context: ../backend/.
    labels:
      - traefik.enable=true
      - traefik.http.routers.backend.rule=PathPrefix(`/v1`)
      - traefik.http.routers.backend.service=backend
      - traefik.http.routers.backend.entrypoints=web
      - traefik.http.services.backend.loadbalancer.server.port=3000
    command: yarn start
    environment:
      - MONGODB_URL=mongodb://mongodb:27017/backend
    depends_on:
      - mongodb
    volumes:
      - ../backend/.:/usr/src/backend
    networks:
      - traefik-network
      - backend-network

  mongodb:
    image: mongo:4.2.1-bionic
    container_name: mongodb
    ports:
      - 27017:27017
    volumes:
      - dbdata:/data/db
    networks:
      - backend-network

volumes:
  dbdata:

networks:
  backend-network:
  traefik-network:

The problem is...

If the frontend (backend and traefik too) is turned on

  • the paths to localhost/* work (this is what I want),
  • but the paths to localhost/v1/* don't work (Problem here!).

If the frontend is turned off but traefik and backend is turned on

  • the paths to localhost/* don't work (of course, that's right),
  • but the paths to localhost/v1/* work (of course, this is what I want).

I've tried a lot of solutions but nothing seems to work the way I want it to.
What did I misunderstand?

Thanks for helping,
Have a nice day

2

I found something else...

My frontend labels :

    labels:
      - traefik.enable=true  
      - traefik.http.routers.intellitrans-frontend.rule=Host(`localhost`)
      - traefik.http.routers.intellitrans-frontend.entrypoints=web

My backend labels :

      - traefik.enable=true
      - traefik.http.routers.intellitrans-backend.rule=Host(`api.localhost`)
      - traefik.http.routers.intellitrans-backend.service=intellitrans-backend
      - traefik.http.routers.intellitrans-backend.entrypoints=web
      - traefik.http.services.intellitrans-backend.loadbalancer.server.port=3000

This one redirect all request api.localhost/* ---> backend and all request localhost/* ---> frontend.

That said, there is no possibility to accomplish the original goal?
Which it's supposed to be : localhost/v1/* ---> backend and all other requests localhost/* ---> frontend

3

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