libvirt xml 예제

libvirt 개발 관련 정보

http://libvirt.org/hacking.html

git clone git://libvirt.org/libvirt.git

domain xml 예제 (/storage/controller.xml)

<domain type="kvm">

  <name>controller</name>

  <memory>2097152</memory>

  <vcpu>4</vcpu>

  <sysinfo type="smbios">

    <system>

      <entry name="manufacturer">sunshout</entry>

      <entry name="product">OpenStack Controller</entry>

      <entry name="version">2013.4</entry>

    </system>

  </sysinfo>

  <os>

    <type>hvm</type>

    <boot dev="hd"/>

    <smbios mode="sysinfo"/>

  </os>

  <features>

    <acpi/>

    <apic/>

  </features>

  <clock offset="utc">

    <timer name="pit" tickpolicy="delay"/>

    <timer name="rtc" tickpolicy="catchup"/>

  </clock>

  <cpu mode="host-model" match="exact"/>

  <devices>

    <disk type="file" device="disk">

      <driver name="qemu" type="qcow2" cache="none"/>

      <source file="/storage/controller.img"/>

      <target bus="virtio" dev="vda"/>

    </disk>

    <interface type='bridge'>

      <mac address='52:54:00:23:76:00'/>

      <model type="virtio"/>

      <source bridge="br1"/>

   </interface>

     <interface type='bridge'>

      <mac address='52:55:00:23:76:00'/>

      <model type="virtio"/>

      <source bridge="p2p2_br"/>

   </interface>

    <serial type="pty"/>

    <input type="tablet" bus="usb"/>

    <graphics type="vnc" autoport="yes" keymap="en-us" listen="127.0.0.1"/>

  </devices>

</domain>

CPU Pinning을 쓰고 싶을 때

  <vcpu>4</vcpu>

<cputune>

    <vcpupin vcpu="0" cpuset="4"/>

    <vcpupin vcpu="1" cpuset="5"/>

    <vcpupin vcpu="2" cpuset="6"/>

    <vcpupin vcpu="3" cpuset="7"/>

  </cputune>

virsh 사용법

ㅇ domain 생성 (format: virsh create <xml file>)

virsh create /storage/controller.xml

Libvirt에 command line parameter를 전달하는 방법이 존재

<disk type='file' device='disk'>
      <driver name='qemu' type='raw' cache='none' io='native'/>
      <source file='path/to/disk.img'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </disk>
...
  </devices>
  <qemu:commandline>
    <qemu:arg value='-set'/>
    <qemu:arg value='device.virtio-disk0.scsi=off'/>
  </qemu:commandline>
  <!-- config-wce=off is not needed in RHEL 6.4 -->
  <qemu:commandline>
    <qemu:arg value='-set'/>
    <qemu:arg value='device.virtio-disk0.config-wce=off'/>
  </qemu:commandline>
  <qemu:commandline>
    <qemu:arg value='-set'/>
    <qemu:arg value='device.virtio-disk0.x-data-plane=on'/>
  </qemu:commandline>
<domain>

Note that <qemu:commandline> must be added directly inside <domain> and not inside a child tag like<devices>.

If you do not use libvirt the QEMU command-line is:

qemu -drive if=none,id=drive0,cache=none,aio=native,format=raw,file=path/to/disk.img \
     -device virtio-blk,drive=drive0,scsi=off,config-wce=off,x-data-plane=on

CDROM  attach

<os>
    <type arch='i686' machine='pc'>hvm</type>
    <boot dev='cdrom'/>
  </os>

<disk type='file' device='cdrom'>
      <source file='/home/user/boot.iso'/>
      <target dev='hdc'/>
      <readonly/>
    </disk>

virtio multiqueue

<interface type='bridge'>
      <mac address='52:54:00:43:6e:3f'/>
      <source bridge='clients'/>
      <model type='virtio'/>
      <driver name='vhost' queues='5'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </interface>

ovs NIC attach

<interface type='bridge'>
  <mac address='52:54:00:71:b1:b6'/>
  <source bridge='ovsbr'/>
  <virtualport type='openvswitch'/>
 </interface>