What is Ceph in Proxmox VE, and how do you install and monitor it for a highly available storage cluster?

At its core, Ceph is built on RADOS (Reliable Autonomic Distributed Object Store), which manages object storage and ensures data distribution, redundancy, and automatic recovery. On top of RADOS, Ceph provides RBD for block storage and CephFS for distributed file system access . Data placement is handled by the CRUSH algorithm, which distributes data evenly across nodes for fault tolerance and scalability.

To install Ceph in Proxmox VE:

1. Ensure you have at least one Proxmox node, though three nodes are recommended for production environments. Dedicated disks and a fast network such as 10GbE are strongly advised. 2. In the Proxmox web interface, go to Datacenter → Ceph → Install Ceph. 3. Choose the desired Ceph version and start installation. 4. Configure network settings after installation completes . 5. Create Monitors (MONs) and Object Storage Daemons (OSDs). For production, at least three MONs and OSDs are recommended. 6. Verify cluster health in the web interface to confirm all components are running properly .

Monitoring Ceph is essential. Key metrics include OSD status, Placement Group (PG) health, monitor availability, storage capacity, bandwidth usage, and IOPS performance . Regular monitoring ensures data integrity, performance stability, and early detection of issues.

By integrating Proxmox with Ceph, organizations can build a scalable, self-healing storage infrastructure that supports high availability and modern virtualization demands.