diff -uNrp freeipa-3.3.3.orig/ipaserver/install/ntpinstance.py freeipa-3.3.3/ipaserver/install/ntpinstance.py

--- freeipa-3.3.3.orig/ipaserver/install/ntpinstance.py	2013-11-01 10:34:30.000000000 -0500

+++ freeipa-3.3.3/ipaserver/install/ntpinstance.py	2014-06-26 07:27:19.644718099 -0500

@@ -43,6 +43,8 @@ class NTPInstance(service.Service):

         os = ""

         if ipautil.file_exists("/etc/fedora-release"):

             os = "fedora"

+        elif ipautil.file_exists("/etc/centos-release"):

+            os = "centos"

         elif ipautil.file_exists("/etc/redhat-release"):

             os = "rhel"