QEMU/KVM hypervisor driver

The libvirt QEMU driver can manage any QEMU emulator from version 0.8.1 or later. It can also manage anything that provides the same QEMU command line syntax and monitor interaction. This includes KVM, and Xenner.

Deployment pre-requisites

QEMU emulators: The driver will probe /usr/bin for the presence of qemu, qemu-system-x86_64, qemu-system-mips,qemu-system-mipsel, qemu-system-sparc,qemu-system-ppc. The results of this can be seen from the capabilities XML output.
KVM hypervisor: The driver will probe /usr/bin for the presence of qemu-kvm and /dev/kvm device node. If both are found, then KVM fullyvirtualized, hardware accelerated guests will be available.
Xenner hypervisor: The driver will probe /usr/bin for the presence of xenner and /dev/kvm device node. If both are found, then Xen paravirtualized guests can be run using the KVM hardware acceleration.

Example domain XML config

QEMU emulated guest on x86_64

<domain type='qemu'>
  <name>QEmu-fedora-i686</name>
  <uuid>c7a5fdbd-cdaf-9455-926a-d65c16db1809</uuid>
  <memory>219200</memory>
  <currentMemory>219200</currentMemory>
  <vcpu>2</vcpu>
  <os>
    <type arch='i686' machine='pc'>hvm</type>
    <boot dev='cdrom'/>
  </os>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type='file' device='cdrom'>
      <source file='/home/user/boot.iso'/>
      <target dev='hdc'/>
      <readonly/>
    </disk>
    <disk type='file' device='disk'>
      <source file='/home/user/fedora.img'/>
      <target dev='hda'/>
    </disk>
    <interface type='network'>
      <source network='default'/>
    </interface>
    <graphics type='vnc' port='-1'/>
  </devices>
</domain>

KVM hardware accelerated guest on i686

<domain type='kvm'>
  <name>demo2</name>
  <uuid>4dea24b3-1d52-d8f3-2516-782e98a23fa0</uuid>
  <memory>131072</memory>
  <vcpu>1</vcpu>
  <os>
    <type arch="i686">hvm</type>
  </os>
  <clock sync="localtime"/>
  <devices>
    <emulator>/usr/bin/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <source file='/var/lib/libvirt/images/demo2.img'/>
      <target dev='hda'/>
    </disk>
    <interface type='network'>
      <source network='default'/>
      <mac address='24:42:53:21:52:45'/>
    </interface>
    <graphics type='vnc' port='-1'/>
  </devices>
</domain>

QEMU/KVM hypervisor driver

Deployment pre-requisites

Example domain XML config

QEMU emulated guest on x86_64

KVM hardware accelerated guest on i686

Xen paravirtualized guests with hardware acceleration