Cinder supports a backup mechanism to back up Cinder volumes on external storage devices. Cinder has a Ceph rbd backup driver implementation allowing you to back up Cinder volumes to a dedicated backup Ceph pool.
Before getting started with configuring the Ceph rbd backup driver, make sure to install Ceph client packages and Python rbd binding library on node running cinder-backup service:
[root@controller ~]# yum install -y python-rbd ceph
We will need to prepare a storage pool named cinder-backups:
[root@ceph-node1 ~]# ceph osd pool create cinder-backups 128
Also, we will need a copy of ceph.conf and Ceph keyring files with appropriate permissions on all controller nodes running the cinder-backup service:
[root@ceph-node1 ~]# ceph auth get-or-create client.cinder-backup mon 'allow r' osd 'allow class-read object_prefix rbd_children, allow rwx pool=cinder-backups' [root@ceph-node1 ~]# ceph auth get-or-create client.cinder-backup...