This blog post describes the way to prepare a small lab in virtual environment intended for TripleO (Director) OpenStack deployment tool learning. This is a quick instruction. For deep understanding and command exploration use documentation. 

I used my home laptop with 16 Gb of memory and CentOS 7.3 on the top of it for the lab environment hardware and RHEL 7.3 and RHOPS 10 for virtual machines, but these instructions should be applicable for RDO OpenStack distribution with minor changes.