Glossary

Manila: OpenStack project to provide "Shared Filesystems as a service".
manila-api: Service that provides a stable RESTful API. The service authenticates and routes requests throughout the Shared Filesystem service. There is python-manilaclient to interact with the API.
python-manilaclient: Command line interface to interact with Manila via manila-api and also a Python module to interact programmatically with Manila.
manila-scheduler: Responsible for scheduling/routing requests to the appropriate manila-share service. It does that by picking one back-end while filtering all except one back-end.
manila-share: Responsible for managing Shared File Service devices, specifically the back-end devices.