In our previous article, we analyzed the post-Broadcom VMware crisis. It is now time to take action by providing a robust and cost-effective technical solution.

In this guide, we will configure a clean Debian 12 (Bookworm) server as a Type 1 hypervisor using KVM (Kernel-based Virtual Machine). For management, we will use Cockpit, a native Linux web interface that makes administering Virtual Machines simple and intuitive.

1. System Verification and Update

First, verify that the CPU supports virtualization extensions (Intel VT-x or AMD-V):

egrep -c '(vmx|svm)' /proc/cpuinfo

Ensure the system is up to date:

sudo apt update && sudo apt full-upgrade -y

2. Installing the KVM and Libvirt Stack

Proceed with installing the hypervisor and management libraries.

sudo apt install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils virtinst libosinfo-bin -y

3. Network Configuration (Bridge)

To allow VMs to be visible on the LAN network, we must configure a Network Bridge (e.g., br0).

# /etc/network/interfaces

auto lo
iface lo inet loopback

allow-hotplug enp3s0
iface enp3s0 inet manual

auto br0
iface br0 inet static
    address 192.168.1.100
    netmask 255.255.255.0
    gateway 192.168.1.1
    dns-nameservers 8.8.8.8
    bridge_ports enp3s0
    bridge_stp off
    bridge_fd 0
    bridge_maxwait 0

4. Cockpit Setup for Web Management

Install the base package and the specific module for VM management:

sudo apt install cockpit cockpit-machines -y

5. Complete Installation Video Tutorial

Integrating the textual guide, here is an Asciinema recording showing the entire process. You can copy text directly from the player.

Conclusions

By navigating to https://server_ip_address:9090, you now have full access to manage your virtual machines. We have transformed a standard Debian server into a powerful enterprise-grade KVM hypervisor, without licensing costs and vendor lock-in.