（一）錯誤日誌：
http://storageboy.com/2013/04/25/quick-tip-on-installing-and-running-redhats-openstack-distro/
ERROR : Error during puppet run : err:
/Stage[main]/Packstack::Netns/Exec
[netns_dependecy_install]/returns: change from notrun to 0 failed: Command exceeded timeout at /var/tmp/packstack/f93b67f77de342619ed9805ecc823c8d/modules/packstack/manifests/netns.pp:13
（二）解決方法：
# vim /usr/lib/python2.6/site-packages/packstack/puppet/modules/packstack/manifests/netns.pp
在command => "yum update -y kernel iputils iproute"
上面加一行timeout => 3600，
然後從新執行rdo安裝過程
執行前提先kill掉進程裏面的flock ，puppet，yum進程