docker-compose wordpress mysql连接拒绝

我创建了一个小的docker-compose.yml,它曾经像魅力一样工作,可以部署小型WordPress实例.它看起来像这样：

wordpress:
  image: wordpress:latest
  links:
   - mysql
  ports:
   - "1234:80"
  environment:
    WORDPRESS_DB_USER: wordpress
    WORDPRESS_DB_NAME: wordpress
    WORDPRESS_DB_PASSWORD: "password"
    WORDPRESS_DB_HOST: mariadb
    MYSQL_PORT_3306_TCP: 3306
  volumes:
    - /srv/wordpress/:/var/www/html/
mysql:
  image: mariadb:latest
  mem_limit: 256m
  container_name: mariadb
  environment:
    MYSQL_ROOT_PASSWORD: "password"
    MYSQL_DATABASE: wordpress
    MYSQL_USER: wordpress
    MYSQL_PASSWORD: "password"
  volumes:
    - /srv/mariadb:/var/lib/mysql

但是当我现在开始它时(可能是因为docker更新到Docker版本1.9.1,构建a34a1d5),它失败了

wordpress_1 | Warning: mysqli::mysqli(): (HY000/2002): Connection    refused in - on line 10
wordpress_1 | 
wordpress_1 | MySQL Connection Error: (2002) Connection refused

当我使用wordpress_1的/ etc / hosts时,有MySQL的条目：

172.17.0.10 mysql 12a564fdbc56 mariadb

我能够ping MariaDB服务器.

当我使用docker-compose时,会安装WordPress,并在几次重启后打开MariaDB容器：

Version: '10.0.22-MariaDB-1~jessie'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  mariadb.org binary distribution

哪个schould表明它正在运行,不是吗？

如何让WordPress能够连接到MariaDB容器？