I followed the guide on hastexo to create an OpenStack Cloud. The Keystone service and the are supposed to run on separate machines. However, when I wanted to run glance-api in the console for debugging I had the following error:
ERROR: Unable to load glance-api-keystone from configuration file /etc/glance/glance-api-paste.ini. Got: ImportError('No module named keystone.middleware.auth_token',)
So the Glance API isn't running. I'm running Ubuntu 12.04 LTS and Openstack Essex.
If you want to use keystone for auth, you will need to install some extra python modules. These are needed for both the keystone server and its clients. Try running