yum的epel源

一.centos7的源

以下一个不行，可以试试另一个
rpm -ivh https://mirrors.aliyun.com/epel/epel-release-latest-7.noarch.rpm

rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm