Setup reverse proxy for few applications with docker container

Traefik Traefik v2
1

I have few applications(frontend, backend api, db and auth). I want to use traefik for reverse proxy to handle all trafik. I created docker-compose file and all my applications are running(different ports), but when I try with my host name, it said 404 page not found. Any suggestion please?

Here is my compose file:

version: '3.9'

services:
  db:
    image: postgres
    restart: unless-stopped
    ports:
      - "5432:5432"
    tty: true
    environment:
      - POSTGRES_DB=your_database_name
      - POSTGRES_USER=your_username
      - POSTGRES_PASSWORD=your_password

  app:
    build:
      context: ./app
      dockerfile: Dockerfile
    ports:
      - '9090:5173'
    networks:
      - web-proxy
    volumes:
      - ./app:/app
      - /app/node_modules
    #command: -name web-app
    restart: always
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.app.rule=Host(`app.localhost`)"
    depends_on:
      - proxy
      - api

  api:
    #container_name: api
    build:
      context: ./api
      dockerfile: Dockerfile
    ports:
      - "8383:8000"
    depends_on:
      - proxy
      - db
    networks:
      - web-proxy
    #command: -name api
    environment:
      - DB_HOST=db
      - DB_PORT=5432
      - DB_NAME=your_database_name
      - DB_USER=your_username
      - DB_PASSWORD=your_password
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.api.rule=Host(`api.localhost`)"


 
  proxy:
    # The official v2 Traefik docker image
    image: traefik:v3.0
    networks:
      - web-proxy
    command:
      - --api.dashboard=true
      - --log=true
      - --log.filePath=/logs/traefik.log
      - --log.level=INFO # (Default: error) DEBUG, INFO, WARN, ERROR, FATAL, PANIC
      - --accessLog=true
      - --accessLog.filePath=/logs/access.log
      - --accessLog.bufferingSize=100 # Configuring a buffer of 100 lines
      - --accessLog.filters.statusCodes=204-299,400-499,500-599
      #- --providers.docker=true
      - --api.insecure=true
      - --providers.docker
    ports:
      # The HTTP port
      - "80:80"
      #- "443:443"
      - "8080:8080"
    volumes:
      # So that Traefik can listen to the Docker events
      - /var/run/docker.sock:/var/run/docker.sock
    labels:
      - traefik.enable=true  
networks:
  web-proxy:
    name: web-proxy
2

See simple Traefik example.

Add the target service port to the labels. For security do not expose the ports externally (using ports), but only use Docker network for internal services.

Add docker.network label when target service is using multiple networks.

Did you create DNS entries for subdomain.localhost?

3

I created sub domain names, even I tried the example you provided to me " simple Traefik example". and it said 404 not found as well.

Any suggestion please?

Thank you

4

Share your Traefik static and dynamic config, and docker-compose.yml if used.

Check Traefik debug log and dashboard.

5

you need to use the label with service, like mentioned in example:

- traefik.http.services.mywhoami.loadbalancer.server.port=80

make sure that you are pointing to the correct port

if not work, please share your docker-compose.yml updated again

6

I tried your example as well. It did not work. and, I don't have dynamic config file.

Thank you,

7

I tried @bluepuma77 provided example as well. same thing, it did not work.

Thank you,

8

You don't even have Traefik entrypoints (listening ports) defined, so it will never work. Check the example, it should have everything you need.

9

Hello @bluepuma77 ,

I am not sure what are you exactly talking about, but I tried you provided example, and it also did not work as well. your example

10

Hi @sneycampos ,

Here is @bluepuma77 provided example, `version: '3.9'

services:
traefik:
image: traefik:v3.0
ports:
- 80:80
- 443:443
networks:
- proxy
volumes:
- /var/run/docker.sock:/var/run/docker.sock:ro
- letsencrypt:/letsencrypt
#- /var/log:/var/log
command:
- --api.dashboard=true
- --log.level=INFO
#- --log.filepath=/var/log/traefik.log
- --accesslog=true
#- --accesslog.filepath=/var/log/traefik-access.log
- --providers.docker.network=proxy
- --providers.docker.exposedByDefault=false
- --entrypoints.web.address=:80
- --entrypoints.web.http.redirections.entrypoint.to=websecure
- --entryPoints.web.http.redirections.entrypoint.scheme=https
- --entrypoints.websecure.address=:443
- --entrypoints.websecure.asDefault=true
- --entrypoints.websecure.http.tls.certresolver=myresolver
- --certificatesresolvers.myresolver.acme.email=mail@example.com
- --certificatesresolvers.myresolver.acme.tlschallenge=true
- --certificatesresolvers.myresolver.acme.storage=/letsencrypt/acme.json
labels:
- traefik.enable=true
- traefik.http.routers.mydashboard.rule=Host(traefik.example.com)
- traefik.http.routers.mydashboard.service=api@internal
- traefik.http.routers.mydashboard.middlewares=myauth
- traefik.http.middlewares.myauth.basicauth.users=test:$$apr1$$H6uskkkW$$IgXLP6ewTrSuBkTrqE8wj/

whoami:
image: traefik/whoami:v1.8
networks:
- proxy
labels:
- traefik.enable=true
- traefik.http.routers.mywhoami.rule=Host(whoami.example.com) || Host(www.whoami.example.com)
- traefik.http.services.mywhoami.loadbalancer.server.port=80

  - traefik.http.middlewares.mywwwredirect.redirectregex.regex=^https://www\.(.*)
  - traefik.http.middlewares.mywwwredirect.redirectregex.replacement=https://$${1}
  - traefik.http.routers.mywhoami.middlewares=mywwwredirect

networks:
proxy:
name: proxy

volumes:
letsencrypt:
name: letsencrypt`

Please try it.

Thank you,

11

i tried the example file from link on github and worked fine.

Could you please share your docker-compose.yml again?

12

Could you format the config correctly, so we can read it?

Use 3 backticks in front and after the code to format it, or select the code and press the </> button. In YAML every space matters.