stack-hypervisor

.env should include iso and virtual drive path

• ROOT_ISOS=/media/mohsen/Arc/libvirt/isos
• ROOT_IMAGES=/media/mohsen/Arc/libvirt/images

QEMU

QEMU provides emulated devices that interpret a guest's instructions using the host's hardware.

QEMU can emulate a variety of guest architectures, including x86, ARM, SPARC, and PowerPC.

KVM

The Kernel-based Virtual Machine allows a Linux host to become a Type 1 hypervisor.

Libvirt

Libvirt makes working with individual guests and resources easier than doing so manually.

Virsh

The virtual shell, virsh, is a command-line tool for managing guests and their resources.

• Paravirtualization allows us to use VirtIO to speed up many interactions with host hardware.

• KVM allows QEMU to use paravirtualized hardware.

• Virtualized I/O or VirtIO uses paravirtualization to speed up a guest's communication with host hardware.

• Libvirt provides an API for working with hypervisors and guest configurations.

Installation

Install libvirt

sudo apt install libvirt-bin

Install qemu

sudo apt install qemu-kvm

Install virt-install

sudo apt install virtinst

qemu-kvm and libvirt-bin should be started automatically on boot. If not, run the following commands:

sudo systemctl enable libvirtd.service
sudo systemctl start libvirtd.service

to disable:

sudo systemctl disable libvirtd.service
sudo systemctl stop libvirtd.service

Usage

qemu-kvm is used to run virtual machines. libvirt-bin is used to manage virtual machines.

libvirt-daemon-system

virtinst includes virt-install which is used to create virtual machines.

Packages

virtinst

This package contains some command line utilities to create and edit virtual machines:

• virt-install: provision operating systems into new virtual machines

• virt-clone: cloning existing inactive guests; it copies the disk images, and defines a config with new name, UUID and MAC address pointing to the copied disks

• virt-xml: easily edit libvirt domain XML using virt-install's command line options