1.下载yum源：

wget https://dev.mysql.com/get/mysql80-community-release-el7-5.noarch.rpm

2.执行安装：

rpm -ivh mysql80-community-release-el7-5.noarch.rpm

3.开始安装

yum install -y mysql-server

4.启动mysql服务

systemctl start mysqld

5.查看临时密码登陆mysql，然后修改密码

grep 'temporary password' /var/log/mysqld.log

1）登录mysql

mysql -uroot -p

2)修改密码

alter user 'root'@'localhost' identified by 'Admin123456!';

3）开启远程登录

use mysql ;
update user set host = '%' where user = 'root';
FLUSH PRIVILEGES;

4）重启数据库

service mysqld restart 

5）查看数据库启动状态

systemctl status mysqld

出现如下界面，代表安装成功：