KVM QEMU Installation Script

This repository contains a script that will install KVM and QEMU. Script is intended as a support for the following article:

KVM QEMU Installation & Configuration Guide

Installation

Clone this repository (or download zip file) and and execute the script by appending sudo bash (i.e., sudo bash kvm-qemu-autoinstall.sh). You can also copy the script to one of executable paths and run it from anywhere (leave out sudo if running as root):

sudo cp kvm-qemu-autoinstall.sh /usr/local/sbin/kvm-qemu-autoinstall
sudo chown root:root /usr/local/sbin/kvm-qemu-autoinstall
sudo chmod 0755 /usr/local/sbin/kvm-qemu-autoinstall
sudo kvm-qemu-autoinstall

Image pools & virtual networks

The script will remove the default image pool and the default network. New ones will be created.

Image pools

The script will create the following dir based image pools:

• Default images pool intended for guest virtual drives at /home/libvirt/vm_images
• ISO images pool intended for ISO installation media at /home/libvirt/iso_images

Virtual networks

The script will create the following virtual networks:

• Default NAT network with DHCP (Interface: virbr0, Gateway: 172.16.0.1, Netmask: 255.255.255.255, DHCP Range: 172.16.0.2 - 172.16.0.255)
• Static NAT network (no DHCP, Interface: virbr1, Gateway: 172.17.0.1, Netmask: 255.255.255.0, Start address: 172.17.0.2)
• Isolated network (Interface: virbr2, requires a guest running as a "router")

Helper scripts

As an option to this script, a helper scripts bundle can be installed (-u parameter). Bundle contains the following scripts:

• kvm-guest-actions: Change guest state, manipulate snapshots and guest virtual disks and check guest basic network info
• kvm-debian-server-unattended: Unattended installation of Debian Server guest machine, with all required checks and resources

You can find more details on helper scripts at: https://github.com/zjagust/kvm-qemu-install-script/blob/main/resources/README.md

Options

Script has several options (parameters), and without supplying one it will just display help documentation. Following are the parameters:

-h: Print this help message
-r: Check system readiness
-n: Check how to enable Nesting (if -r shows it's disabled)
-z: Check how to disable Zone Reclaim Mode (if -r shows it's enabled)
-s: Check swappiness recommendations for your system
-d: Check I/O scheduler recommendations for your disk devices
-i: Install KVM QEMU. Recommended to run -r first
-u: Install helper scripts bundle