ExecStart=/usr/bin/dockerd --graph=/work/docker_data 
--storage-driver devicemapper 
--storage-opt dm.loopdatasize=1000G 
--storage-opt dm.loopmetadatasize=10G 
--storage-opt dm.fs=ext4 
--storage-opt dm.basesize=100G 
-H fd:// --containerd=/run/containerd/containerd.sock

version: '3'
services:
 nginx:
 image: mycentos:nginx
 ports:
 - "8080:80"
 volumes:
 - /home:/usr/local/nginx/html
 - /var/logs/nginx/logs:/usr/local/nginx/logs
 command: /usr/local/nginx/sbin/nginx -g "deamon off;"
 
 redis:
 image: mycentos:redis
 ports:
 - "6380:6379"

version: '3.3'
services:
 db:
 image: mysql:5.7
 volumes:
 - db_data:/var/lib/mysql
 restart: always
 environment:
 # 指定环境变量 docker -itd -e MYSQL_ROOT_PASSWORD= somewordpress
 MYSQL_ROOT_PASSWORD: somewordpress
 MYSQL_DATABASE: wordpress
 MYSQL_USER: wordpress
 MYSQL_PASSWORD: wordpress
 
 wordpress:
 depends_on: # 1.先启动上面的db(依赖)，才能被安装 2.docker link
 - 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: {}
 # 对应最上面的 volumes: