drbd：
http://mirror.rackspace.com/elrepo/elrepo/el7/SRPMS/
rabbitmq：
https://dl.bintray.com/rabbitmq/all/rabbitmq-server/3.7.15/
https://www.rabbitmq.com/releases/rabbitmq-server
nginx：
http://nginx.org/packages/mainline/centos/7/
php72：
https://us-east.repo.webtatic.com/yum/el7/SRPMS/RPMS/
mariadb：
keepalived：
http://www.nosuchhost.net/~cheese/fedora/packages/epel-7/SRPMS/keepalived.html