On Fri, Aug 3, 2012 at 9:49 AM, Eric Blake <[email protected]> wrote:
> [please don't top-post on technical lists] > > On 08/03/2012 09:02 AM, Harish Patil wrote: > > Thanks Michal. > > Yes I do not have a screen, the host and the guests are running on an > > embedded device. > > The real requirement is: > > Is there a way that I can register with libvirt for the state change > > notifications in the guest OS? > > Is it possible? > > I need to take some actions in the host based on the guest OS state > change. > > How would you do this in a network of bare metal machines? You may be > better served by setting up actions based on network messages sent by > the guest, the way you would with one bare-metal machine reporting to > another. Also, this sounds more like something that a guest agent would > have to coordinate at a higher level than libvirt, as there is nothing > inherent in running qemu that tells libvirt what the guest inside the > qemu process is doing. virt-dmesg' ability to peek at guest memory is > about the best you will be able to do through libvirt. > > >> > Thanks Eric. Understand that there is no such facility at the libvirt level. Do you know whether such notification can be received/trapped at the qemu level itself ? I had once checked that QEVENT_RESET event is emitted when the guest OS reboots. > >> 1: http://people.redhat.com/~rjones/virt-dmesg/ > > -- > Eric Blake [email protected] +1-919-301-3266 > Libvirt virtualization library http://libvirt.org > >
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