在CentOS7.5中基于docker-compose安装mysql5.7

一、部署规划

服务器IP	192.168.113.48
端口	3306
安装目录	/home/work/docker-mysql-5.7
数据映射目录	/home/work/docker-mysql-5.7/data
配置文件	/home/work/docker-mysql-5.7/config/my.cnf

使用3306端口，安装前请确保宿主机3306端口是否已被占用。Mysql的默认字符集为latin1，根据配置文件将字符集集修改为utf8mb4，该字符集支持emoji特殊字符。

二、安装Mysql5.7

• 在安装目录下新建并按照规划编辑docker-compose.yml文件，编辑完后保存退出

  vim docker-compose.yml
  

  version: '3'
  services:
    mysql:
      image: mysql:5.7
      container_name: mysql-5.7
      #使用该参数，container内的root拥有真正的root权限，否则，container内的root只是外部的一个普通用户权限
      #设置为true，不然数据卷可能挂载不了，启动不起
      privileged: true
      restart: always
      ports:
        - "3306:3306"
      environment:
        MYSQL_ROOT_PASSWORD: root
        MYSQL_USER: root
        MYSQL_PASS: root
        TZ: Asia/Shanghai
      command:
        --wait_timeout=31536000
        --interactive_timeout=31536000
        --max_connections=1000
        --default-authentication-plugin=mysql_native_password
      volumes:
        #映射mysql的数据目录到宿主机，保存数据
        - "/home/work/docker-mysql-5.7/data:/var/lib/mysql"
        #根据宿主机下的配置文件创建容器
        - "/home/work/docker-mysql-5.7/config/my.cnf:/etc/mysql/my.cnf"
  

  根据需要root用户密码可自行决定；连接时间、最大连接数可根据需要进行修改；

  --default-authentication-plugin=mysql_native_password主要解决远程访问问题。若MySQL为8.0版本，请修改为--default-authentication-plugin=caching_sha2_password

• 在安装目录下创建config目录，并编写my.cnf配置文件

  [client]
  # 客户端来源数据的默认字符集
  default-character-set=utf8mb4
  
  [mysqld]
  # 服务端默认字符集
  character-set-server=utf8mb4
  # 连接层默认字符集
  collation-server=utf8mb4_unicode_ci
  
  [mysql]
  # 数据库默认字符集
  default-character-set=utf8mb4
  

• 在安装目录下执行相关命令，启动容器

  docker-compose up -d
  

  查看并进入容器当中，登录mysql，查看字符集是否修改：

  [root@node03 docker-mysql-5.7]# docker-compose ps
    Name                 Command               State                 Ports              
  --------------------------------------------------------------------------------------
  mysql-5.7   docker-entrypoint.sh --wai ...   Up      0.0.0.0:3306->3306/tcp, 33060/tcp
  [root@node03 docker-mysql-5.7]# docker-compose exec mysql bash
  root@72f9ad3a4f36:/# mysql -uroot -proot
  mysql: [Warning] Using a password on the command line interface can be insecure.
  Welcome to the MySQL monitor.  Commands end with ; or g.
  Your MySQL connection id is 35
  Server version: 5.7.31 MySQL Community Server (GPL)
  
  Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
  
  Oracle is a registered trademark of Oracle Corporation and/or its
  affiliates. Other names may be trademarks of their respective
  owners.
  
  Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
  
  mysql> show variables like '%character%';
  +--------------------------+----------------------------+
  | Variable_name            | Value                      |
  +--------------------------+----------------------------+
  | character_set_client     | utf8mb4                    |
  | character_set_connection | utf8mb4                    |
  | character_set_database   | utf8mb4                    |
  | character_set_filesystem | binary                     |
  | character_set_results    | utf8mb4                    |
  | character_set_server     | utf8mb4                    |
  | character_set_system     | utf8                       |
  | character_sets_dir       | /usr/share/mysql/charsets/ |
  +--------------------------+----------------------------+
  8 rows in set (0.01 sec)
  
  mysql> 
  

三、验证远程访问Mysql

• 利用工具连接数据库