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Re: [Qemu-devel] [libvirt-users] Using virsh to load scripts for the gue
From: |
Anthony Liguori |
Subject: |
Re: [Qemu-devel] [libvirt-users] Using virsh to load scripts for the guest machine |
Date: |
Wed, 01 Aug 2012 08:48:33 -0500 |
User-agent: |
Notmuch/0.13.2+93~ged93d79 (http://notmuchmail.org) Emacs/23.3.1 (x86_64-pc-linux-gnu) |
Eric Blake <address@hidden> writes:
> On 07/30/2012 12:00 PM, Mauricio Tavares wrote:
>> On Mon, Jul 30, 2012 at 1:50 PM, Eric Blake <address@hidden> wrote:
>>> On 07/15/2012 07:52 PM, Mauricio Tavares wrote:
>>>> Right on the top of
>>>> http://www.centos.org/docs/5/html/5.2/Virtualization/chap-Virtualization-Managing_guests_with_virsh.html,
>>>> it seems to imply you can load/send scripts to the vm guest using virsh.
>>>> Is that possible? How and what are the limitations? Can you query the vm
>>>> guest?
>>>
>>> What type of scripts are you talking about? You may be thinking more
>>> about the capabilities of what libguestfs provides, for modifying disk
>>> images. In general, virsh itself controls how to start a guest, but not
>>> the additional layers of communication (such as virtio, qemu-ga, or the
>>> libguestfs appliance app) required for a host to command a guest to do
>>> something from within the guest.
>>>
>> Basic one would be in case a machine has been paused for a long
>> time. You know as in "hey, you lazy vm! You have been sleeping for two
>> weeks! Now your clock is way off and poor ntp can't sync it back. So,
>> here's current date!"
>
> That is something that fits better through qemu-ga, but no one has
> implemented it yet (cc'ing qemu-devel in case I'm misrepresenting
> things). Of course, if we did have a qemu-ga command for pushing the
> current time into the guest, then libvirt could usefully expose an API
> to wrap that qemu-ga command.
Could you setup a wiki page on qemu.org with a list of qemu-ga
commands that libvirt would like?
Adding commands is pretty trivial so if ya'll have a list of things
you'd like, they're great quick tasks that we can find folks to work on.
Regards,
Anthony Liguori
>
> --
> Eric Blake address@hidden +1-919-301-3266
> Libvirt virtualization library http://libvirt.org
- Re: [Qemu-devel] [libvirt-users] Using virsh to load scripts for the guest machine,
Anthony Liguori <=