docker-compose wordpress mysql连接拒绝

Question

我创建了一个小的docker-compose.yml,曾经像魅力一样工作,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

当我有猫/etc/hosts的wordpress_1条目有MySQL:

172.17.0.10 mysql 12a564fdbc56 mariadb

我能够ping MariaDB服务器.

当我docker-compose up安装WordPress并在几次重启后,MariaDB容器打印:

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？

Answer 1

此行为的原因可能与最近的内核和docker更新有关.我在其他docker-compose设置中认识到了其他一些连接问题.因此,我重新启动了服务器(不仅仅是docker服务),从那时起就没有任何类似的问题.

Answer 2

要解决这个问题,首先要做的是:

将以下代码添加到wordpress和数据库容器中(在docker-compose文件中):

restart: unless-stopped

这将确保在wordpress容器尝试连接之前启动并初始化数据库.然后重启docker引擎

sudo restart docker

或(对于ubuntu 15+)

sudo service docker restart 

这里有完整的配置,对我来说,使用MariaDB设置wordpress:

version: '2'

services:
  wordpress:
    image: wordpress:latest
    links:
      - database:mariadb
    environment:
      - WORDPRESS_DB_USER=wordpress
      - WORDPRESS_DB_NAME=mydbname
      - WORDPRESS_TABLE_PREFIX=ab_
      - WORDPRESS_DB_PASSWORD=password
      - WORDPRESS_DB_HOST=mariadb
      - MYSQL_PORT_3306_TCP=3306
    restart: unless-stopped
    ports:
      - "test.dev:80:80"
    working_dir: /var/www/html
    volumes:
     - ./wordpress/:/var/www/html/
  database:
   image: mariadb:latest
   environment:
     - MYSQL_ROOT_PASSWORD=password
     - MYSQL_DATABASE=mydbname
     - MYSQL_USER=wordpress
     - MYSQL_PASSWORD=password
   restart: unless-stopped
   ports:
     - "3306:3306"