I was made aware of the following blueprint today: http://blueprints.launchpad.net/heat/+spec/add-quota-api-for-heat http://review.openstack.org/#/c/96696/14 Before this goes much further.. I want to suggest that this work be cancelled, even though the code looks excellent. The reason those limits are in the config file is that these are not billable items and they have a _tiny_ footprint in comparison to the physical resources they will allocate in Nova/Cinder/Neutron/etc. IMO we don't need fine grained quotas in Heat because everything the user will create with these templates will cost them and have its own quota system. The limits (which I added) are entirely to prevent a DoS of the engine.