I deployed openstack yoga using kolla ansible, and used LVM as a backend for cinder storage service, after the deployment everything was working fine, but after a month, I could no longer create a volume as I get an error message
schedule allocate volume:Could not find any available weighted backend.
and the cinder_scheduler log shows the following error message
ERROR cinder.scheduler.flows.create_volume [req-2290223d-8f96-48d7-8680-959c5932d5be 3b4bd66ca3b04ab587a9a64a9e6966bc ec29bdcd73064dfb8186f413537327eb - - -] Failed to run task cinder.scheduler.flows.create_volume.ScheduleCreateVolumeTask;volume:create: No valid backend was found. No weighed backends available: cinder.exception.NoValidBackend: No valid backend was found. No weighed backends available
the storage server doesn't show any apparent errors, any ideas of how can I fix this?