Create a volume New RBD image gets created in the pool configured in your cinder.conf.

Create a volume backup Create a new volume in the destination pool, the first backup is a full copy, the new ones will be incremental.

Create a volume from a snapshot (with rbd_flatten_volume_from_snapshot=false) Creates a new volume. Will be a clone in Ceph and the parent will be the snapshot.

Create a volume from a snapshot (with rbd_flatten_volume_from_snapshot=true) Creates a new volume. Will be a new RBD image in Ceph.

Create a volume from a volume The source volume gets snapshotted and the volume will be clone of this snapshot.

Create volume from image If the image is in a Ceph pool and its location exposed then the volume will be a clone.