If you want to be able to retrieve volume samples, you need to instruct Block Storage to send notifications to the bus by editing the cinder.conf file and changing notification_driver to cinder.openstack.common.notifier.rabbit_notifier and control_exchange to cinder, before restarting the service. We now restart the Block Storage service with its new settings. # service cinder-volume restart # service cinder-api restart We now restart the Block Storage service with its new settings. # service openstack-cinder-api start # service openstack-cinder-agent-central start # systemctl start openstack-cinder-api.service # systemctl start openstack-cinder-volume.service