中止连接到数据库; docker – 撰写ruby和MySQL图像 – 读取通信数据包时出错

我正在使用docker-compose来运行一个与MySQL数据库泊坞窗图像的rails应用程序。

docker-compose build不错， docker – 撰写起来也很好，即使有一些警告（MySQL映像版本问题）

... db_1 | MySQL init process done. Ready for start up. db_1 | [Warning] Failed to set up SSL because of the following SSL library error: SSL context is not usable without certificate and private key ... db_1 | [Warning] 'db' entry 'sys mysql.sys@localhost' ignored in --skip-name-resolve mode. db_1 | [Warning] 'proxies_priv' entry '@ root@localhost' ignored in --skip-name-resolve mode. db_1 | [Warning] 'tables_priv' entry 'sys_config mysql.sys@localhost' ignored in --skip-name-resolve mode. db_1 | Version: '5.7.10' socket: '/var/run/mysqld/mysqld.sock' port: 3306 MySQL Community Server (GPL) db_1 | Version: '5.7.10' socket: '/var/run/mysqld/mysqld.sock' port: 3306 MySQL Community Server (GPL) web_1 | [2016-02-11 18:38:10] INFO WEBrick 1.3.1 web_1 | [2016-02-11 18:38:10] INFO ruby 2.2.0 (2014-12-25) [x86_64-linux] web_1 | [2016-02-11 18:38:10] INFO WEBrick::HTTPServer#start: pid=1 port=3000 

当我运行迁移命令docker-compose运行web rake db：在另一个terminal上创build|迁移时，我得到这个错误，在当前的（ docker-compose up ）中：

 db_1 | [Note] Aborted connection 2 to db: 'unconnected' user: 'root' host: '172.17.0.4' (Got an error reading communication packets) ... db_1 | [Note] Aborted connection 3 to db: 'unconnected' user: 'root' host: '172.17.0.4' (Got an error reading communication packets) 

这是我的Dockerfile ：

 FROM ruby:2.2.0 RUN apt-get update -qq && apt-get install -y build-essential RUN mkdir /myapp WORKDIR /myapp ADD Gemfile /myapp/Gemfile ADD Gemfile.lock /myapp/Gemfile.lock RUN bundle install ADD . /myapp EXPOSE 3000 

这是我的docker-compose.yml ：

  db: image: mysql:latest environment: MYSQL_ROOT_PASSWORD: password web: build: . command: bundle exec rails s -p 3000 -b '0.0.0.0' volumes: - .:/myapp ports: - "3000:3000" links: - db 

这是我的database.yml ：

 default: &default adapter: mysql2 pool: 5 encoding: utf8 host: db username: root password: password development: <<: *default database: myapp_development test: <<: *default database: myapp_test 

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