I am currently working on setting up an Openstack cloud. Because international bandwidth is very expensive here, I would like to allow users to control the amount of international bandwidth available to them on an instance basis. Also, I would like to be able to measure actual international bandwidth used, so billing can take actual usage into account.

I have read through the quota documentation, but cannot seem to find any evidence that this is something that is easily achievable "out of the box".

I am keen to hear if anybody has any kind of input on how I might achieve this.