Previous parts of this chapter discussed configuring various backend storage drivers with the cinder-volume service. Cinder allows configuring and utilizing multiple storage backends simultaneously. While configuring multiple storage backends with Cinder, a cinder-volume process is launched for each storage backend. We can choose a name for each storage backend that can be specified while creating new Cinder volumes. Cinder also supports setting identical names for several storage backends. In this scenario, Cinder-Scheduler decides where to place new volumes when created, based on weighing of the scheduler. This will be discussed further in the next section.
In this section, we will configure cinder to use two separate LVM volume groups as storage backends. Under the default section, we will specify two storage provider names separated by commas, and we will configure each of the storage providers and name them.