Category Archives: KVM

Running Proxmox VE inside KVM (nested virtualization)

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Introduction

This will be a shorter post and somewhat of an extension of my last post on building a lab environment in Proxmox VE. Here I’ll explore running Proxmox VE inside of KVM virtual machines using nested virtualization, instead of on bare metal systems. This is useful if you want to experiment with Proxmox VE, but don’t have any extra PCs laying around to run it on. The performance is not as good when compared to running it on physical hardware, but at the same time it has the advantage of being to spin a cluster up and down without having to reinstall the OS on an actual computer. In this post, I will spin up the same Terraform lab environment in Proxmox VE, but with nested virtualization instead of running it on physical hardware. A “bonus” section will involve swapping out Bind and isc-dhcp-server for Dnsmasq in the lab environment.

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Installing Debian 12 and 13 on a ProLiant DL360 G7

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Introduction

In a previous post, I discussed my experiences with installing a recent version of Enterprise Linux, AlmaLinux 9, on an e-waste HP ProLiant DL360 G7. I also discussed updating the firmware for the Integrated Lights-Out (iLO) remote management tool and the HP Smart Array controller, and installing the OS over the network from the iLO console. In this post I will perform some of these tasks, but for Debian instead. I will also incorporate some knowledge from my previous posts on virtualization, networking, and Ansible.

These exercises were performed on a ProLiant DL360 G7, but it’s likely that they will work on other Proliant servers.

A ProLiant DL360 G7 at the bottom of an e-waste stack.

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Modifying my Perl YAML-based Provisioner for KVM

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Introduction

In my last post, I discussed how I wrote a Perl script that uses a YAML file to build a list of virtual machines on the Xen hypervisor. When the script was nearly complete, it occurred to me: why not modify this script for use with libvirt/KVM? I mainly use KVM instead of Xen because of its better support for Enterprise Linux. Often, when I need to spin up a set of virtual machines for testing, I use dmacvicar/libvirt provider for Terraform. Usually this works pretty well; however, sometimes I get annoyed at having to learn the HCL language and just want to define a list of VMs with my specs. That is where I can see this script being of use, at least for myself. Of course, my intention was not to replace Terraform, even for myself. Mainly, this was a fun project that exercised my Perl skills and taught me stuff about Linux networking, libvirt, and more.

KVM host setup

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