Description of problem:
Need an article on how to customize RBAC policies for Compute
(sgordon: really a Keystone topic but has applications for each service).
Due to our need to focus on upcoming releases of the documentation, and given the scope of this bug, it is currently outside of what we are able to commit writing resources to.
I am closing this bug in its role as a tracker for now. If there is an ongoing strong interest from customers for this content, we'd be happy to revisit this topic in the future.