下载并安装MySQL官方的 Yum Repository

wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm

yum安装

yum -y install mysql57-community-release-el7-10.noarch.rpm

yum安装mysql-server

yum -y install mysql-community-server

启动mysql服务

systemctl start mysqld.service

查看安装mysql时自动生成的初始密码

grep "password" /var/log/mysqld.log 

进入mysql

mysql -uroot -p

设置新密码

mysql> ALTER USER USER() IDENTIFIED BY '新的密码';

允许所有来源的访问（生产环境危险）

mysql> update user set host = '%' where user = 'root';

刷新使修改生效。

mysql> flush privileges;

执行exit退出mysql，开放3306端口

firewall-cmd --zone=public --add-port=3306/tcp --permanent
firewall-cmd --reload