Comment 7 for bug 1122764

Experienced the same problem in installing devstack.
I am able to solve the problem. The problem is in the package dependency for nova-api

following error comes when i execute ./stack.sh
http://paste.openstack.org/show/39239/

After analyzing the log i executed /usr/bin/nova-api
http://paste.openstack.org/show/39240/

>> ImportError: No module named cliff.formatters
As you can see it is an import error for cliff module

 Its an development environment issue.
yum install python-cliff or pip install cliff will resolve the issue.