Description of configuration options for volume

Configuration option=Default value	(Type) Description
rbd_secret_uuid=None	(StrOpt) the libvirt uuid of the secret for the rbd_uservolumes
rbd_user=None	(StrOpt) the RADOS client name for accessing rbd volumes
scality_sofs_config=None	(StrOpt) Path or URL to Scality SOFS configuration file
scality_sofs_mount_point=$state_path/scality	(StrOpt) Base dir where Scality SOFS shall be mounted