Question 83303 in Docker Question posted in
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Network Docker-Compose

I have a docker-compose with a bridge network called mdb_default, where I have a database.

I want to deploy another docker-compose that connects to that network that already exists, but I don’t know how to define it in the docker-compose.
My file is:

supeset:
    container_name: superset
    build: .
    restart: always
    depends_on:
      - mariadb
    environment:
      MAPBOX_API_KEY: 'pk.eyJ1IjoiamFta2lsbHM1IiwiYSI6ImNrd293aDJyZjA3MGQyd3AzdTJpeXp0dTAifQ.w96chqjB6Nv3PW6_lpQVHQ'
    ports:
      - 8000:8088
    volumes:
      - ./superset-data:/var/lib/mysql
    networks:
      - mdb_defatult
networks:
  mdb_dafault:
    driver: bridge

What do I need to do to connect to this existing network?

The network information is that I want to connect both is:

        "Name": "mdb_default",
        "Id": "2c69ba9fb42c1d9ca6142ae49c403d44bae5e297b78f4339c4782d3658f3d49c",
        "Created": "2022-05-17T14:17:47.935473033Z",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": null,
            "Config": [
                {
                    "Subnet": "172.20.0.0/16",
                    "Gateway": "172.20.0.1"
Tags:

2

Answers


  1. 0

    You can declare an external network in the compose file and then have each service attach itself to that. Here’s the documentation for the flag and another article that shows it in practice a bit more:

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  2. 0

    As described here: https://docs.docker.com/compose/networking/#use-a-pre-existing-network

    Try:

    supeset:
    container_name: superset
    build: .
    restart: always
    depends_on:
      - mariadb
    environment:
      MAPBOX_API_KEY: 'pk.eyJ1IjoiamFta2lsbHM1IiwiYSI6ImNrd293aDJyZjA3MGQyd3AzdTJpeXp0dTAifQ.w96chqjB6Nv3PW6_lpQVHQ'
    ports:
      - 8000:8088
    volumes:
      - ./superset-data:/var/lib/mysql
    networks:
      - mdb
networks:
  mdb:
    external:
      name: mdb_default
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