docker compose自定义网络实现固定容器ip地址

由于默认的bridge桥接网络，重启容器后会改变ip地址。在一些场景下我们希望固定容器IP地址。
docker-compose是docker的一个编排工具，相对于命令模式创建网络，容器等。使用配置文件相对来说更方便，可追溯问题。

直接粘贴docker-compose.yml文件

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

说明：

上面配置中我们的nginx容器固定ip为172.19.0.2

示例，自定义网络模式：

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: wordpressnetworks:  extnetwork:   ipam:     config:     - subnet: 172.19.0.0/16      gateway: 172.19.0.1

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