Docker Compose network series --docker-compose connects to the host network

Original URL: Docker Compose Network Series--docker-compose connects to the host network

Introduction

illustrate

This article describes how to implement docker-compose to connect to the host network.

demand scene

The container under services in docker-compose.yml cannot be connected to the host network. The method to allow multiple applications to connect to the network: set networks in docker-compose.yml and designate it as the host network.

The purpose of this article

1 docker compose to connect with the host: app (halo) and the host.

The method of docker compose

1. Add the following configuration to the first-level configuration of each docker-compose.yml:

networks:
  custom_app_net:
    name: host
    external: true

2. The services that need to be connected to the network plus the network configuration:

services:
  app:
    # image: 
    # container_name: 
    # ports:
    # volumes:
    # environment:
    networks:
      - custom_app_net

The docker method

docker xxx --net app_net