Thank you Eric, I am using KVM: qemu.. I'll try to see how I can use qemu-guest-agent.. If you have links to examples on how to start with it let me know please. Consider the following simple scenario..
I am using KVM to run several VMs; one of OSs in the guests is Windows XP. I want to send to it something from the Hypervisor level, e,g text,parameters,etc so that it will be displayed in the VM screen or stored in a file so I can read from the VM later.. It's best to be done on a live VM. How can such a simple scenario be performed. Does it have to be through the method of qemu-guest-agent?? Thanks alot, T.alsaid On Mon, Mar 24, 2014 at 5:17 PM, Eric Blake <ebl...@redhat.com> wrote: > On 03/24/2014 10:36 AM, Taimur Al Said wrote: > > Hi there, > > > > I am a beginner with Libvirt. I was practicing using Python bindings with > > libvirt to do some basic stuff like starting a VM, rebooting a VM, > > displaying the number of domain,etc. I was wondering since the hypervisor > > has control over the VMs, it is possible to use Libvirt to inject code > into > > the VM? Is it possible to start processes inside a particular VM using > the > > Libvirt API. If not, what would you recommend instead? Thanks in advance > > What hypervisor are you using? With lxc:// URI, this is already > possible (see virsh lxc-enter-namespace). With qemu:// URI, this isn't > really libvirt's thing to do directly; but you might be able to enhance > the qemu-guest-agent to run an arbitrary command, then install that > agent in your guest, then use libvirt's 'virsh qemu-agent-command' to > drive that new agent command. > > If the changes you want in your guest can be done while the guest is > offline, then libguestfs is a great suite of tools for making all sorts > of guest disk image modifications (which is as programmatic as you can > get for injecting behavior changes into your guest). But actually > injecting live processes into a running qemu guest is not possible > without setting up some sort of higher-level protocol, such as > qemu-guest-agent. > > -- > Eric Blake eblake redhat com +1-919-301-3266 > Libvirt virtualization library http://libvirt.org > >
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