We introduced the Ceph filesystem in Chapter 3, Key Components for Building a Proxmox VE Cluster, and we learned that it is a distributed filesystem. If you are not comfortable using the command line, Proxmox provides a built-in Ceph server service for you as an alternative option. Proxmox also provides a GUI to manage the Ceph service in its web management console, which should be much easier. In this section, I will show you how to build a Ceph service in Proxmox as a server and mount a Ceph device as a client.

As we mentioned before, we need to have three monitor nodes for a Ceph service. So, if we want to use Proxmox as a Ceph server, we need to have at least three nodes. Do you remember that we have already attached the network configuration for the third Proxmox server? Now, it's time for you to practice installing a Proxmox server and add it to the existing cluster. Remember to set up the hostname under the new node before adding it...