libvirt users - Nov 2011 - [libvirt-user] questions about disk driver virtio and charmonitor

hi all,
   I have two questions about libvirt.

   At first, how can I write a XML file that libvirt could give me a command
that include this: if=virtio.

  -drive
file=/dev/vg.vmms/lvm-v097218.sqa.cm4,if=none,id=drive-ide0-0-0,format=raw
-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0

  event I have let the <target dev=vda bus=virtio>  the XML file also make
the command not include virtio, it's like this:

-drive
file=/dev/vg.vmms/lvm-v097226.sqa.cm4,if=none,id=drive-virtio-disk0,format=raw,cache=none
-device
virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0

 and my question is, this is command args could enable virtio? or there is some
other XML format could let the if=virtio.

  Second when I boot the vm in the second step after use the kickstart install
it.
Once in a while, it occurs an error that:

                    monitor socket did not show up.: No such file or >
                    Traceback (most recent call last):
                    File
"/home/lingjiao.lc/vmms/backserv/bin/../lib/virtmgr.py<http://lingjiao.lc/vmms/backserv/lib/virtmgr.py>",
line 1007, in request_vm
                            dom.create()
                    File
"/usr/lib64/python2.6/site-packages/libvirt.py", line 325, in create
                    if ret == -1: raise libvirtError ('virDomainCreate()
failed', dom=self)
                    libvirtError: monitor socket did not show up.: No such file
or directory

  But if I reinstall it, it will be ok.  If I install hundreds of VMs once, I
think this is a headache.


   Could anybody help me, how can I disable the charmonitor or solve these
problem.

Thanks.

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