1：拉取mysql镜像

    1. docker pull mysql:5.7

    2：在root目录下创建挂载目录目录用于存放配置信息和数据

    mkdir /root/mysql

    3：创建my.cnf配置文件

    touch /root/mysql/conf/my.cnf

    4：修改配置文件

    vi  /root/mysql/conf/my.cnf 

添加
[mysqld]
user=mysql
character-set-server=utf8
default_authentication_plugin=mysql_native_password
secure_file_priv=/var/lib/mysql
expire_logs_days=7
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION
max_connections=1000
[client]
default-character-set=utf8
[mysql]
default-character-set=utf8

    5：运行容器

    docker run --name mysql_5.7  -p 3306:3306  -v $PWD/conf/my.cnf:/etc/mysql/my.cnf  -v $PWD/logs:/logs  -v $PWD/data:/var/lib/mysql   -e MYSQL_ROOT_PASSWORD=123456 -d mysql:5.7