====== KVM/Qemu recipes ======

I'm just copying and pasting stuffs I want to keep around. Maybe sometime I will write an article on this.

sources:
  * http://fedoraproject.org/wiki/Virtualization_Quick_Start
  * http://www.howtoforge.com/virtualization-with-kvm-on-a-debian-squeeze-server


===== - Do a snapshot of a VM =====

<code bash>
$ virsh -c qemu:///system
Welcome to virsh, the virtualization interactive terminal.

Type:  'help' for help with commands
       'quit' to quit

virsh # list
 Id Name                 State
----------------------------------
  1 centos_gln           running

virsh # save 1 /home/jvehent/Documents/GLN/kvm/centos_gln.img.snapshot.1300806811
Domain 1 saved to /home/jvehent/Documents/GLN/kvm/centos_gln.img.snapshot.1300806811

</code>

===== - Create a new network =====

Fedora doesn't come with a predefined network. Virsh can be used to create one prior to creating new virtual machines.

First, create the following file in **/etc/libvirt/qemu/networks/default.xml**:
<file>
<network>
  <name>default</name>
  <uuid>a9378609-10a3-400c-a0fd-6bea10567db6</uuid>
  <forward mode='nat'/>
  <bridge name='virbr0' stp='on' delay='0' />
  <mac address='52:54:00:7c:4d:e8'/>
  <ip address='192.168.122.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='192.168.122.2' end='192.168.122.254' />
    </dhcp>
  </ip>
</network>
</file>

Then define this network using the **virsh** command line.

<code bash>
virsh net-define /etc/libvirt/qemu/networks/default.xml
</code>