To retrieve volume samples, you must configure the Block Storage service to send notifications to the bus. Edit /etc/cinder/cinder.conf and add in the [DEFAULT] section on the controller and volume nodes: control_exchange = cinder notification_driver = cinder.openstack.common.notifier.rpc_notifier Restart the Block Storage services with their new settings. On the controller node: # service cinder-api restart # service cinder-scheduler restart # systemctl restart openstack-cinder-api.service openstack-cinder-scheduler.service On SLES: # service openstack-cinder-api restart # service openstack-cinder-scheduler restart On openSUSE: # systemctl restart openstack-cinder-api.service openstack-cinder-scheduler.service On the storage node: # service cinder-volume restart # systemctl restart openstack-cinder-volume.service On SLES: # service openstack-cinder-volume restart On openSUSE: # systemctl restart openstack-cinder-volume.service If you want to collect OpenStack Block Storage notification on demand, you can use cinder-volume-usage-audit from OpenStack Block Storage. For more information, Block Storage audit script setup to get notifications.