High Load on the Ceph Cluster Being Used for Cinder
Problem
You are observing increased IOPS to the Ceph clusters especially for the Cinder pool.
Environment
- Platform9 Managed OpenStack - All Versions
Cause
Cinder queries the Ceph cluster periodically to gather data regarding the Cinder backends, volumes and the snapshots present on the Cinder__pool.
Resolution
- Add the
rbd_exclusive_cinder_pool
property to the cinder_override.conf file across all your Cinder hosts. This property needs to be added to the backend configuration stanza.
x
pf9@test ~ $ cat /opt/pf9/etc/pf9-cindervolume-base/conf.d/cinder_override.conf
[DEFAULT]
enabled_backends = ceph
glance_api_version = 2
[ceph]
volume_backend_name = ceph1
volume_driver = cinder.volume.drivers.rbd.RBDDriver
rbd_exclusive_cinder_pool = true
- Restart the pf9-cindervolume-base service for the changes to take effect
pf9@test ~ $ systemctl restart pf9-cindervolume-base
Additional Information
The value for the property is going to be set to True by default starting with the Wallaby release as per the OpenStack release notes.
Was this page helpful?