download MysqL repo source
wget http://repo.MysqL.com/MysqL-community-release-el7-5.noarch.rpm
install rpm source
rpm -ivh MysqL-community-release-el7-5.noarch.rpm
install MysqL
yum install MysqL-server
firewall setting
service firewalld stop
service iptables stop
auto start services
systemctl enable MysqLd
原文链接：https://www.f2er.com/centos/380457.html