In my Cent OS6.5, I want to install the below:[root@localhost /]# yum install -y http://rdo.Fedorapeople.org/openstack/openstack-grizzly/rdo-release-grizzly-1.noarch.rpmBut I get the below information:[root@localhost /]# yum install -y http://rdo.Fedorapeople.org/openstack/openstack-grizzly/rdo-release-grizzly-1.noarch.rpmLoaded plugins: fastestmirrorLoading mirror speeds from cached hostfile * base: mirrors.163.com * extras: mirrors.163.com * updates: mirrors.163.comSetting up Install ProcessCannot open: http://rdo.Fedorapeople.org/openstack/openstack-grizzly/rdo-release-grizzly-1.noarch.rpm. Skipping.Error: Nothing to do[root@localhost /]# How to fix it? 
Cannot open: http://rdo.Fedorapeople.org/openstack/openstack-grizzly/rdo-release-grizzly-1.noarch.rpm. Skipping
centos