CODEWITHSUNDEEP
dockerdocker-compose
ptk
ptk

Reputation: 7623

Can't use "network_mode" in docker-compose.yml file version 3 with docker-compose v1.24.1

When I try to docker-compose my docker-compose.yml file with "network_mode", I receive the following error:

ERROR: The Compose file './docker-compose.yml' is invalid because: services.combined.network_mode contains an invalid type, it should be a string

My docker-compose.yml file:

version: '3'
services:
    dbrs:
        hostname: localhost
        build:
            context: .
            dockerfile: ./docker/dbrs/Dockerfile
        volumes:
            - dbdata:/data/db
        ports:
            - "27017:27017"
            - "27018:27018"
            - "27019:27019"
        networks:
            - app-network

    combined:
        build:
            context: .
            dockerfile: ./docker/combined/Dockerfile
        env_file: .env
        ipc: host
        volumes:
            - .:/home/node/app
            - ./cypress:/usr/src/app/cypress
            - node_modules:/home/node/app/node_modules
            - /tmp/.X11-unix:/tmp/.X11-unix
            - /dev/shm:/dev/shm
        ports:
            - "5000:5000"
            - "8080:8080"
        networks:
            - app-network
        network_mode:
            - "service:dbrs"
        depends_on:
            - dbrs

networks:
    app-network:
        driver: bridge

volumes:
    dbdata:
    node_modules:

As far as I'm aware, network_mode should be available for version 3 per the docs. My docker-compose version is 1.24.1, build 4667896.

Is there any other reason why I can't use "network_mode" in my docker-compose.yml file?

Upvotes: 0

Views: 5184

Answers (1)

David Maze
David Maze

Reputation: 158847

When you say:

network_mode:
  - "service:dbrs"

The new line, hyphen declares a YAML list. As the error message notes, this needs to be a single string and not a list; the value should be on the same line.

network_mode: "service:dbrs"

(It's pretty unusual to directly connect to another service's network stack like this. If you need to communicate with the other container, you can use its Compose service name and internal port number, dbrs:27017. Networking in Compose has more details.)

Upvotes: 3

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