[root@localhost ~]# rpm -ivh http://mirrors.ustc.edu.cn/mysql-repo/mysql-community-release-el7.rpm

[root@localhost ~]# yum install mysql mysql-server

[root@localhost ~]# systemctl start mysqld

[root@localhost ~]# systemctl enable mysqld

[root@localhost ~]# mysql_secure_installation

NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL

      SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!

In order to log into MySQL to secure it, we'll need the current

password for the root user.  If you've just installed MySQL, and

you haven't set the root password yet, the password will be blank,

so you should just press enter here.

Enter current password for root (enter for none):