A simple tool to automate openstack snapshots
https://phabricator.wikimedia.org/T294429
https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/16.1/html/block_storage_backup_guide/using-cinder-backup
https://community.ovh.com/en/t/automatic-block-storage-backup-how/4695/11