ProxCLMC – Determine the maximum CPU compatibility in Proxmox VE clusters

ProxCLMC inspects all nodes in a Proxmox VE cluster, analyzes their CPU capabilities, and calculates the highest possible CPU compatibility level that is supported by every node. Instead of guessing, maintaining spreadsheets, or breaking migrations at 2 a.m., you get a deterministic result you can directly use when selecting VM CPU models.

Other virtualization platforms solved this years ago with built-in mechanisms (think cluster-wide CPU compatibility enforcement). Proxmox VE doesn’t have automated detection for this yet, so admins are left comparing flags by hand. ProxCLMC fills exactly this missing piece and is tailored specifically for Proxmox environments.