1.进入docker容器
docker exec -it confluence /bin/bash
2.挂载外部配置和数据安装(创建mysql.cnf)
mkdir /docker
mkdir /docker/mysql
mkdir /docker/mysql/conf
mkdir /docker/mysql/data
创建my.cnf配置文件
touch /docker/mysql/conf/my.cnf
my.cnf添加如下内容：
[mysqld]
user=mysql
character-set-server=utf8
default_authentication_plugin=mysql_native_password
[client]
default-character-set=utf8
[mysql]
default-character-set=utf8
3.docker挂载mysql
docker run -d -p 3306:3306 --privileged=true -v /docker/mysql/conf/my.cnf:/etc/mysql/my.cnf -v /docker/mysql/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 --name mysqltest2 mysql:5.7
--privileged=true：容器内的root拥有真正root权限，否则容器内root只是外部普通用户权限
-v /docker/mysql/conf/my.cnf:/etc/my.cnf：映射配置文件
-v /docker/mysql/data:/var/lib/mysql：映射数据目录
4.启动mysql报错
关闭selinux
setenforce 0
vim /etc/sysconfig/selinux
SELINUX=disabled
# 若不关闭，使用docker启动mysql5.7镜像容器时启动不起来，查看日志会有如下错误显示：
ERROR: mysqld failed while attempting to check config
command was: "mysqld --verbose --help"
mysqld: Can't read dir of '/etc/mysql/conf.d/' (Errcode: 13 - Permission denied)
mysqld: [ERROR] Fatal error in defaults handling. Program aborted!
ERROR: mysqld failed while attempting to check config
command was: "mysqld --verbose --help"
mysqld: Can't read dir of '/etc/mysql/conf.d/' (Errcode: 13 - Permission denied)
mysqld: [ERROR] Fatal error in defaults handling. Program aborted!
