Proxmox VE

Proxmox VE is a complete open-source virtualization platform that combines two technologies on one system: the KVM hypervisor for full virtual machines running Windows or Linux, and LXC containers for lightweight, conflict-free Linux workloads. A web-based management interface ties it together, so you manage VMs, containers, storage, networking, and clustering from a browser without installing any client software.

This is the foundation of a large share of homelabs. Instead of dedicating a physical machine to each service, you install Proxmox on one capable server and carve it into virtual machines and containers as needed: one VM for a NAS, a container for your reverse proxy, another for a media server, and so on. Software-defined storage and networking, plus integration with ZFS and Ceph, handle the data layer.

Since Broadcom’s acquisition of VMware and the subsequent licensing changes, Proxmox has become the default migration target for people leaving ESXi and vSphere. It offers clustering, live migration between nodes, and high availability, all features that previously required expensive enterprise licences.

Two practical notes. Proxmox installs as a full operating system on bare metal, built on Debian; it is not a package you add to an existing Linux install. And while the software is completely free, the enterprise update repository requires a subscription. Free users simply switch to the no-subscription repository to receive updates. The medium difficulty reflects the virtualization and storage concepts involved, but the web UI makes day-to-day operation far more approachable than the underlying technology suggests.