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dockerdocker-composecompatibility
Meghna
Meghna

Reputation: 205

Docker Compose network_mode and port_binding compatibility issue

My docker-compose.yml contains this:

version: '3.2'
services:
  mysql:
    image: mysql:latest
    container_name: mysql
    restart: always
    network_mode: "host"
    hostname: localhost
    environment:
      MYSQL_ROOT_PASSWORD: root
      MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
    volumes:
      - $HOME/data/datasql:/var/lib/mysql
    ports:
      - 3306:3306

  user-management-service:
    build: user-management-service/
    container_name: user-management-service
    restart: always
    depends_on:
      - mysql
      - rabbitmq
      - eureka
    network_mode: "host"
    hostname: localhost
    ports:
      - 8089:8089

When I try to do docker-compose up, I get the following error:

"host" network_mode is incompatible with port_bindings

Can anyone help me with the solution?

Upvotes: 17

Views: 50258

Answers (7)

frmbelz
frmbelz

Reputation: 2543

On Fedora 39. First I installed with

sudo dnf install docker docker-compose
docker-compose -v
docker-compose version 1.29.2, build unknown
docker -v
Docker version 24.0.5, build %{shortcommit_cli}

docker was moby-engine and docker-compose was older v1 Python version (deprecated). And I had this same error

... "host" network_mode is incompatible with port_bindings

I removed those docker and docker-compose and reinstalled docker community edition

sudo dnf remove docker-compose
sudo dnf remove docker
sudo dnf config-manager --add-repo https://download.docker.com/linux/fedora/docker-ce.repo
sudo dnf install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

docker version
Client: Docker Engine - Community
 Version:           26.1.1
...
docker compose version
Docker Compose version v2.27.0

This installed newer docker-compose v2 in Go, there was no error anymore. This should be possible on Ubuntu, etc.

Upvotes: 0

atreeon
atreeon

Reputation: 24087

If you want to connect to a local database then, when connecting to that database, don't use "localhost" or "127.0.0.1". Instead use "host.docker.internal" and that will allow traffic between your container to the database.

Upvotes: 2

Saoussen BOUDHIAFI
Saoussen BOUDHIAFI

Reputation: 11

I had the same problem with network_mode: 'host'.

When downgrading docker-compose from 1.29.2 to 1.25.4, it worked fine. Maybe some bug added in new versions?

Upvotes: 1

eightball
eightball

Reputation: 1230

To access the host's http://localhost inside your docker, you need to replace:

network_mode: host

with:

ports:
  - 80:80

You can do the same with any other port.

Upvotes: 1

kwendo
kwendo

Reputation: 93

Get rid of the param ports in your services containing network_mode its like doing mapping twice.

mysql: image: mysql:latest container_name: mysql restart: always network_mode: "host" hostname: localhost environment: MYSQL_ROOT_PASSWORD: root MYSQL_ALLOW_EMPTY_PASSWORD: "yes" volumes: - $HOME/data/datasql:/var/lib/mysql .... ....

Upvotes: -1

USMAN FAZIL
USMAN FAZIL

Reputation: 840

Quick solution:

Downgrade the docker-compose version and you'll be fine. The issue is with the latest docker-compose version and network_mode: "host" I faced the same issue on v1.29.2 and while everything worked smooth on v1.27.4.

Upvotes: 4

David Maze
David Maze

Reputation: 158847

network_mode: host is almost never necessary. For straightforward servers, like the MySQL server you show or what looks like a normal HTTP application, it's enough to use normal (bridged) Docker networking and ports:, like you show.

If you do set up host networking, it completely disables Docker's networking stack. You can't call to other containers using their host name, and you can't remap a container's port using ports: (or choose to not publish it at all).

You should delete the network_mode: lines you show in your docker-compose.yml file. The container_name: and hostname: lines are also unnecessary, and you can delete those too (specific exception: RabbitMQ needs a fixed hostname:).

I feel like the two places I see host networking are endorsed are either to call back to the host machine (see From inside of a Docker container, how do I connect to the localhost of the machine?), or because the application code has hard-coded localhost as the host name of the database or other components (in which case Docker and a non-Docker development setup fundamentally act differently, and you should configure these locations using environment variable or another mechanism).

Upvotes: 17

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