1. Controller Node
yum install rabbitmq-server报错：
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
erlang-sd_notify-0.1-1.el7.x86 FAILED
解决：yum install deltarpm
yum install rabbitmq-server
Centos7搭建OpenStack——Liberty遇到的问题与解决
原文：http://www.cnblogs.com/lsyu/p/5142876.html