Some common terms which you might come across frequently on using OpenStack cluster:
Core project which provides a dashboard, a web interface. It is based on Django (A python based web framework).
Core project that provides Compute services.
Core project that provides the OpenStack Image Service.
Core project that provides block storage services for VMs
Core project which provides object storage services.
An IP address that a project can associate with a VM so that the instance has the same public IP address each time that it boots. You create a pool of floating IP addresses and assign them to instances as they are launched to maintain a consistent IP address for maintaining DNS assignment.