On 01/03/2012 01:31 PM, Michal Privoznik wrote:
On 03.01.2012 14:39, Kees van Reeuwijk wrote:
Hello,
First of all, happy new year!
I am interested in the hot plugging facilities of libvirt, in particular
in what qemu calls 'hot add' of network interface cards. (And also the
reverse: hot unplugging/removing of NICs.)
I think I am overlooking something, but so far the best I have been able
to find is:
http://libvirt.org/sources/virshcmdref/html/
and it is not entirely clear to me what the relevant virsh commands are.
The most obvious choice seems to be the iface-* commands such as
http://libvirt.org/sources/virshcmdref/html/sect-iface-define.html
but these seem to be about physical rather than virtual network
interfaces, and the documentation `needs to be written' anyway, and from
the copyright notice the manual seems to be somewhat outdated by now.
Can you give me a little help with this? Is such hot plug/add
functionality supported by libvirt in the first place? Is there some
kind of overview document about this? What is the most authoritative
documentation of this functionality? Is there a Java or C API to access
this functionality?
Thank you for any help you can give me,
I think virsh attach-interface / detach-interface is what you are
looking for. Another option is to write a little XML snippet and virsh
attach-device it.
Additionally, I can vouch for at least a centos6 guest being able to
properly respond to hotplug/remove for virtio NICs. It automatically
runs the ifup for the interface as long as the MAC address is correct.
I imagine this works for other O/S as well. I add/remove using
virt-manager (which uses libvirt) so I don't know the specific virsh
command...
David
