docker安装mysql并配置宿主机挂载目录。
docker run -d -e MYSQL_ROOT_PASSWORD=rootPwd --name mysql8 -v /home/docker/docker-mysql/my.cnf:/etc/mysql/my.cnf -v /home/docker/docker-mysql/mysql-files:/var/lib/mysql-files/ -v /home/docker/docker-mysql/data:/var/lib/mysql -p 3306:3306 mysql:8.0
需要着重说的：
MYSQL_ROOT_PASSWORD ： 登录密码
mysql:8.0：下载mysql的版本
其他的就是挂载目录的配置 端口号 。
配置文件 my.cnf
# Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# The MySQL Server configuration file.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
secure-file-priv= NULL
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Custom config should go here
!includedir /etc/mysql/conf.d/
sql_mode = STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION
lower_case_table_names = 1
mysql大小写配置要在初始化之前配置，如果初始化后配置的需要把挂载目录下data中的库表信息删除。