I'm wondering how to fix this problem! Essentially the dynamic routing via service name on the default Docker network is not working. :(

I had considered making it use a static IP but that may be more work than fixing the original issue.

docker-compose.yml

version: "3.8"
services:
  client:
    build: client
    ports: [3000]
    depends_on:
      - server
    volumes:
      - ./client:/app

  mongodb:
    image : mongo
    environment:
      - PUID=1000
      - PGID=1000
    ports: [27017]
    restart: unless-stopped
    volumes:
      - ./mongodb/database:/data/db

  server:
    build: server
    ports: [5000]
    restart: always
    depends_on:
      - mongodb
    volumes:
      - ./server:/app

If I do this ping test from the client it will work via the browser

http://0.0.0.0:49246/ping

However, I really want it to work in this approach here

http://server:5000/ping

Help? Thank you!

CodePudding user response：

Web app code runs in the browser, not the server hosting the files. The browser is typically running on the host.

It sounds like you want the server to map a known port on the host. Try using this to map host port 5000 to the server container port 5000...

server:
  build: server
  ports:
    - "5000:5000"
  # etc

and connect on http://localhost:5000 in your web app code.

See https://docs.docker.com/compose/compose-file/compose-file-v3/#ports

If you're wanting your web app to proxy requests (for example using the Create React App proxy configuration), you would use the internal host name since this action is performed by the client service.

"proxy": "http://server:5000"