Hi,
[Rephrasing my earlier post with more clarity.]
I need to work with "guest-fsfreeze-*" commands in Windows 2008 guest VM
(Host is CentOS 6.4) to quisce the applications.
*Windows 2008 Guest Machine*
1. Windows 2008 is running following services
- QEMU Guest Agent
- QEMU Guest Agent VSS Provider
2. C:\> vssadmin list providers
...
Provider name: 'QEMU Guest Agent VSS Provider
....
Version: 0.12.1
Provider name: 'Microsoft Software Shadow Copy provider 1.0'
....
Version: 1.0.0.7
*Host (CentOS 6.4)*
When "guest-fsfreeze-*" commands are invoked from host, response
received from guest is "This is not supported". Since "QEMU Guest Agent VSS
Provider" was already running in Guest VM, I was expecting these commands
to succeed and quisce Windows applications, but they were reported as
unsupported.
[root@sdsr720-14 Downloads]# virsh qemu-agent-command vm_win_06 '{
"execute": "guest-fsfreeze-status"}'
{"error":{"class":"Unsupported","desc":"this feature or command is not
currently supported","data":{}}}
[root@sdsr720-14 Downloads]# virsh qemu-agent-command vm_win_06 '{
"execute": "guest-fsfreeze-freeze"}'
{"error":{"class":"Unsupported","desc":"this feature or command is not
currently supported","data":{}}}
*Is missing qga-vss.dll the reason?*
I searched my system for this dll and could not find it and suspected that
missing qga-vss.dll is the reason for this. I took suggestions from
following post which advised to cross-compile qemu code to get qga-vss.dll
http://lists.gnu.org/archive/html/qemu-devel/2013-02/msg01963.html.
But I faced a lot of issues while building i686-w64-mingw32-* in CentOS 6.4
and had to eventually give up building i686-w64-mingw32-* and move to
getting pre-compiled QEMU guest agent (with VSS support), which I can
install on Windows to quisce the applications.
*What I need *
If I can get pre-compiled qga-vss.dll, I can copy it to Windows8 guest VM
and hopefully work with guest-fsfreeze-* commands to quisce the
applications.
Can somebody point me to pre-compiled QEMU guest agent with VSS support
(and qga-vss.dll) so that I can quisce the Windows guest VM applications?
Regards,
~Puneet
On Tue, Jul 8, 2014 at 3:27 AM, Eric Blake <ebl...@redhat.com> wrote:
> On 07/07/2014 02:32 AM, Puneet Bakshi wrote:
> > Hi,
> >
> > I want to work with "guest-fsfreeze-*" commands in Windows 2008 guest VM.
> > Host is CentOS 6.4.
> >
> > Windows 2008 is running QEMU VSS provider. When "guest-fsfreeze-*"
> commands
> > are invoked from host, response received is "This is not supported".
> >
> > I am following
> > http://lists.gnu.org/archive/html/qemu-devel/2013-02/msg01963.html.
>
> The libvirt list is the wrong place to be asking this question; qemu is
> better.
>
> The spice-devel list has done some pre-packaged virt stack builds for
> Windows; maybe they might be a better resource to ask (for example, see
> http://lists.freedesktop.org/archives/spice-devel/2014-February/016100.html
> )
> - but I don't follow that list closely enough to know if they have
> pre-built qga.
>
> You could always download the mingw cross-compiler and try to build qga
> yourself, instead of relying on someone else to provide a pre-built binary.
>
> --
> Eric Blake eblake redhat com +1-919-301-3266
> Libvirt virtualization library http://libvirt.org
>
>
