Mastering Virtualization with Proxmox: Building Robust Clusters

Part 3: High Availability in Proxmox


The power of Proxmox doesn’t stop at single instances; it extends to managing multiple nodes via clustering. This post will shed light on how to build robust clusters with Proxmox, what benefits they offer in terms of scalability, and how they can safeguard your data further.

Why Cluster?

The beauty of clustering lies in its ability to centralize the management of multiple Proxmox nodes. Through a single web interface, you can manage numerous VMs and containers distributed across several physical servers. Clustering allows you to aggregate computational resources, providing a more efficient and scalable infrastructure.

How to Set Up a Cluster in Proxmox

Setting up a Proxmox cluster is straightforward. The process includes installing a Proxmox cluster file system (pmxcfs), setting up nodes, and joining them into the cluster. Once the cluster is active, it acts as a single, unified entity that you can manage through the Proxmox web interface.

Cluster Resources: Shared Storage and Networking

Shared storage becomes an indispensable asset in a clustered environment. Proxmox supports a variety of storage types—NAS, SAN, and distributed file systems like Ceph—that enable seamless data sharing between nodes. Networking is equally crucial, as Proxmox supports multiple networking setups for clusters, including bonding and bridging options.

Failover and Migration: The Power of Mobility

Clusters are not just about pooling resources; they are about resilience. Proxmox allows VMs and containers to be migrated from one node to another without service interruption. If a node fails, the services running on that node can be automatically moved to a healthy node, minimizing downtime and maintaining service integrity.


Clustering in Proxmox empowers you to create a resilient, scalable, and highly available virtualized environment. With shared resources and automated failover processes, a Proxmox cluster is more than the sum of its parts—it’s an integrated system designed for optimal performance and reliability.

Contact Us

If you’re looking to implement Proxmox clustering solutions or need further guidance, don’t hesitate to reach out via our Contact page.

Up Next: In our next post, we will delve into the intricacies of high-availability configurations within Proxmox clusters, aiming to eliminate single points of failure in your setup.

Scroll to Top