下载mysql的repo源:repo.mysql.com
1、wget http://repo.mysql.com/mysql-community-release-el7.rpm
2、sudo rpm -ivh mysql-community-release-el7.rpm
安装这个包后，会获得两个mysql的yum repo源：
/etc/yum.repos.d/mysql-community.repo
/etc/yum.repos.d/mysql-community-source.repo
可cd /etc/yum.repos.d/查看
3、sudo yum install mysql-server
4、rpm -qa | grep mysql
5、sudo chown -R openscanner:openscanner /var/lib/mysql/
6、service mysqld restart
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