docker-compose wordpress mysql 连接被拒绝 [英] docker-compose wordpress mysql connection refused

问题描述

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

I've created a small docker-compose.yml which used to work like a charm to deploy small WordPress instances. It looks like this:

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

但是当我现在启动它时(也许因为 docker 更新到 Docker 版本 1.9.1，构建 a34a1d5)，它失败了

But when I start it now (maybe since docker update to Docker version 1.9.1, build a34a1d5), it fails

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

当我看到 wordpress_1 的 /etc/hosts 时，有 MySQL 的条目:

When I cat /etc/hosts of the wordpress_1 there are entries for MySQL:

172.17.0.10 mysql 12a564fdbc56 mariadb

并且我能够 ping 通 MariaDB 服务器.

and I am able to ping the MariaDB server.

当我 docker-compose up 时，WordPress 被安装，并在多次重启后 MariaDB 容器打印:

When I docker-compose up, WordPress gets installed and after several restarts the MariaDB container prints:

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

哪个应该表明它正在运行，不是吗?

Which schould indicate it to be running, isn't it?

如何让 WordPress 能够连接到 MariaDB 容器?

How do I get the WordPress to be able to connect to the MariaDB container?

推荐答案

这种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 设置中发现了其他几个连接问题.因此，我重新启动了服务器(不仅仅是 docker 服务)并且从那时起就没有出现任何类似的问题.

The reason for this behaviour probably was related to a recent kernel and docker update. I recognized several other connection issues in other docker-compose setups. Therefore I restarted the server (not just the docker service) and didn't have had any issues like this ever since.

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