Proxmox HA Cluster
Building a data center-grade homelab with zero-single-point-of-failure.
The Challenge
The primary goal was to create a highly resilient virtualization environment that could survive the failure of any single physical node without impacting the availability of hosted services. This required solving three main problems:
- Eliminating the single point of failure in the hypervisor layer.
- Implementing shared storage that is synchronously replicated.
- Designing an automated failover mechanism with low Recovery Time Objective (RTO).
The Solution
I implemented a 3-node Proxmox VE cluster utilizing Ceph as the distributed storage backend. Ceph allowed me to pool local NVMe drives across all nodes into a single, resilient storage cluster.
Technical Architecture
Implemented a Quorum-based voting system to prevent "split-brain" scenarios. Configured Corosync for cluster communication and utilized Proxmox HA Manager for automated VM migration.
The network was segmented into three distinct VLANs: Management, Cluster Communication, and VM Traffic, ensuring that high-volume storage replication didn't saturate the management plane.
Impact & Results
The resulting infrastructure provides a robust platform for critical home services and development environments.