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,
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