Upgrading your Ceph cluster
One of several reasons for the greatness of Ceph is that almost all the operations on a Ceph cluster can be performed online, which means that your Ceph cluster is in production and serving clients, and you can perform administrative tasks on the cluster without downtime. One of these operations is upgrading the Ceph cluster version.
Since the first chapter, we have been using the Giant release of Ceph, which was intentional so that we could demonstrate upgrading the Ceph cluster version from Giant to Hammer. As per best practice, you should follow the recommended upgrade sequence for Ceph, which is in the following order:
- The ceph-deploy tool
- The Ceph monitor daemons
- The Ceph OSD daemons
- The Ceph metadata servers
- The Ceph ...
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