I'm trying to install rdo havana on rhel 6.4, I've followed the instructions in http://openstack.redhat.com/QuickStartLatest, it seems that packstack's answer file with "CONFIG_USE_EPEL=y" on a machine without prior epel repo file does not set an epel repo well, and as a result packstack fails with the following error:

# packstack --allinone --os-neutron-install=y --debug
...
ERROR : Error during puppet run : err: /Stage[main]/Keystone/Package[keystone]/ensure: change from absent to present failed: Execution of '/usr/bin/yum -d 0 -e 0 -y install openstack-keystone' returned 1: Error: Package: python-keystone-2013.2-0.5.b2.el6.noarch (openstack-havana)

Another issue I've came across - packstack tries to access a glance conf file in a stage where openstack-glance is not yet installed, probably happens only when changing Neutron-related (why?) configurations in packstack's answer file:

ERROR : Error during puppet run : err: /Stage[main]//Glance_api_config[DEFAULT/notifier_strategy]/ensure: change from absent to present failed: Could not set 'present on ensure: No such file or directory - /etc/glance/glance-api.conf at /var/tmp/packstack/8da55081f3a447b1bd84d3451faaa36f/manifests/10.35.160.29_cinder.pp:43

-- 

Thanks,

Rami Vaknin, QE @ Red Hat, TLV, IL.