Busy Cinder volumes & Ceph

If you run into an issue where a Cinder volume you attached to a VM can not be deleted even after detaching it from the VM, and when you look into the logs you find something like ERROR cinder.volume.manager ....... Unable to delete busy volume. or WARNING cinder.volume.drivers.rbd ......... ImageBusy error raised while deleting rbd … Continue reading Busy Cinder volumes & Ceph


Ceph RBD snapshots for an attached volume

You might find yourself in a scenario where you need to backup a CEPH volume attached to an Openstack Instance. CEPH snapshots come automatically to mind as the "state-in-time" solution. Once you take a CEPH snapshot, you can export it and backup the volume either as a physical file or at the file system level, … Continue reading Ceph RBD snapshots for an attached volume

Adding a new node to ceph

If you are expanding your ceph cluster with extra nodes.  You will need to prepare the node to have ceph installed and prepare the OSDs to be part of the ceph cluster. In order to do this, you can use ceph-deploy to install ceph on the new nodes and prepare/activate the osds on it. The … Continue reading Adding a new node to ceph