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Installation

Find the latest version of this software on GitHub:

https://github.com/vpenso/libvirt-shell-functions

Clone the repository and add the scripts to your shell environment:

$ apt-get install git-core
$ git clone git://github.com/vpenso/libvirt-shell-functions.git /srv/vms
$ chmod 777 /srv/vms
$ source /srv/vms/vm_functions.sh

Prepare your computer to allow the execution of virtual machines following all steps described in the following section.

Prerequisite

Make sure virtualization support is enabled in your firmware (BIOS/EFI), check with:

$ egrep --color '(vmx|svm)' /proc/cpuinfo

Using a computer with enough memory is beneficial.It is
recommend to use a 64Bit operating system since it can virtualize 32 and 64Bit virtual machines. For Debian/Ubuntu flavored system install the following packages:

$ apt-get install kvm qemu libvirt-bin dnsmasq git-core chef xmlstarlet rsync sshfs

In case you are using a different Linux flavor, the package list above will help you to find the corresponding packages in another distribution.

On Debian Squeeze: Installing the dnsmasq package in will start automatically an instance of the daemon. Before you continue make sure to shut it down and disable it from the boot process.

 $ sudo service dnsmasq stop
 $ sudo update-rc.d dnsmasq disable

Ubuntu is pre-configured to allow users to start virtual machines. In Debian follow these steps to enable your user account to manage virtual machines:

$ sudo adduser `id -un` libvirt
$ sudo adduser `id -un` kvm

Make sure to add your account name to /etc/libvirt/qemu.conf,

user = "USER"

where USER is the name of the user that should be able to start VMs talking to the system qemu/libvirt bus.

Re-login to activate these group rights. Add the following to your shell environment to make sure to communicate only to the system-wide instance of libvirtd.

$ export LIBVIRT_DEFAULT_URI=qemu:///system 
$ export VIRSH_DEFAULT_CONNECT_URI=qemu:///system

Networking

All virtual machine instances run inside a host-internal network shared by all virtual machines, connected to the external world using a NAT. The network configuration is defined in '_config/libvirt_nat_bridge.xml'. To use this network configuration.

$ export VIRSH_NET_CONFIG=<your_install_path>/_config/libvirt_nat_bridge.xml

Enable the network bridge with:

$ vm network start
Network 'nat_bridge' started
$ vm network status
Name            nat_bridge
UUID            f68a4de1-ce37-c59a-aeac-fcd189a07fd7
Active:         yes
Persistent:     yes
Autostart:      yes
Bridge:         nbr0