Docker Compose

1、单机多容器部署工具,通过脚本解决部署多个服务的问题,只能在一台电脑上部署,如果是集群则使用不了
2、通过yml文件定义多容器如何部署;
3、win/mac默认提供Docker Compose,Linux需要安装

version: '3.3'
services:
   db:
     image: mysql:5.7 #docker run mysql:5.7
     volumes:
       - db_data:/var/lib/mysql  # -v empty:/var/lib/mysql
     restart: always # 自动重启
     environment: #下面的设置等于docker run -e MYSQL_ROOT_PASSWORD = somewordpress
       MYSQL_ROOT_PASSWORD: somewordpress
       MYSQL_DATABASE: wordpress
       MYSQL_USER: wordpress
       MYSQL_PASSWORD: wordpress
   wordpress:
     depends_on: #docker --link db
       - db
     image: wordpress:latest
     ports:
       - "8000:80"
     restart: always
     environment:
       WORDPRESS_DB_HOST: db:3306
       WORDPRESS_DB_USER: wordpress
       WORDPRESS_DB_PASSWORD: wordpress
       WORDPRESS_DB_NAME: wordpress
volumes:
    db_data: {}