Docker compose custom network to achieve fixed container IP address

Due to the default bridge network, the IP address will change after restarting the container. In some scenarios we want to fix the container IP address.
Docker-compose is an orchestration tool for Docker, which creates networks, containers, etc. relative to the command mode. Using configuration files is relatively more convenient and can trace problems.

Paste the docker-compose.yml file directly

version: '2'
services:
  nginx:
   image: nginx:1.13.12
   container_name: nginx
   restart: always
   tty: true
   networks:
     extnetwork:
      ipv4_address: 172.19.0.2
 
networks:
  extnetwork:
   ipam:
     config:
     - subnet: 172.19.0.0/16
      gateway: 172.19.0.1

illustrate:

gateway is the gateway address
subnet is the network segment
extnetwork is a custom network name

In the above configuration, our nginx container has a fixed IP of 172.19.0.2

Example, custom network mode:

version: '2'
services:
  nginx:
   image: nginx:1.13.12
   container_name: nginx
   restart: always
   networks:
     extnetwork:
   ports:
     - 80:80
   volumes:
     - '/nginx/conf.d:/etc/nginx/conf.d'
  nginx2:
   image: nginx:1.13.12
   container_name: nginx2
   restart: always
   networks:
     extnetwork:
      ipv4_address: 172.19.0.2
     
  db:
   image:mysql:5.7
   container_name: db
   volumes:
    - /var/lib/mysql:/var/lib/mysql
   restart: always
   networks:
     extnetwork:
   ports:
     -3306:3306
   environment:
    MYSQL_ROOT_PASSWORD: wordpress
    MYSQL_DATABASE: wordpress
    MYSQL_USER: wordpress
    MYSQL_PASSWORD: wordpress   
  
  wordpress:
   image: wordpress:latest
   container_name: wordpress
   depends_on:
     -db
   ports:
     - "8000:80"
   restart: always
   networks:
     extnetwork:
   environment:
     WORDPRESS_DB_HOST: db:3306
     WORDPRESS_DB_NAME: wordpress
     WORDPRESS_DB_USER: wordpress
     WORDPRESS_DB_PASSWORD: wordpress
networks:
  extnetwork:
   ipam:
     config:
     - subnet: 172.19.0.0/16
      gateway: 172.19.0.1

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.

You may also be interested in: