Re: [libvirt] invoking interface.script - missing interface name of domain
On Tue, Jan 20, 2009 at 04:12:06PM +0100, Daniel Schwager wrote:
Hi,
i would like to write a small script
- bringing up my qemu-kvm interface and
- connecting it to a bridge
using the following XML domain-syntax :
....
<interface type='ethernet'>
<script path='/etc/kvm/qemu-ifup'/>
</interface>
....
The script will invoked (from qemu-kvm I thinkg) but
I can't find any arguments like "interface name" - so
my script cannot setup the bridge correctly because of
missing information about the interface name.
At the moment, I look to the PPID (parent pid of the script) and
parse the qemu commandline (ps ef) to find out the interfacename -
but it's only a workaround.
Q: Is there a way to get informed about the interface libvirt/quemu used
for the new domain ?
QEMU is responsible for passing arguments to the interface scripts,
so its out of libvirt's control. QEMU passes a single paramter to
the script, which is the name of the TAP device interface being
added. If you don't give a <target dev='tap3'> libvirt generates
a TAP device name vnetXXXX.
Daniel
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