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 Run the following commands on the controller and volume nodes: # openstack-config --set /etc/cinder/cinder.conf DEFAULT control_exchange cinder # openstack-config --set /etc/cinder/cinder.conf DEFAULT 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 # service openstack-cinder-api restart # service openstack-cinder-scheduler restart On the volume node: # service openstack-cinder-volume restart # service cinder-volume restart