[libvirt] Re: About libvirt API Support event notification mechanism problem

Daniel P. Berrange berrange at redhat.com
Thu Dec 3 11:28:32 UTC 2009

On Wed, Dec 02, 2009 at 04:16:33PM +0800, ajia wrote:
> Dear Daniel,
> Recently, I am writing test plan about libvirt asynchronous event 
> mechanism,
> refering to the following bugs from the bugzilla:
> spice/vnc: https://bugzilla.redhat.com/show_bug.cgi?id=515268
> disk error: https://bugzilla.redhat.com/show_bug.cgi?id=515270
> I know libvirt can communicate with qemu monitor by QMP at present, can
> I use libvirt API to test it now?libvirt-0.7.4-1is ok?
> In addition,In qemu monitor with rhel6(2.6.31-31.el6.x86_64),"notify" 
> command
> is nonexistent (Fedora12 is existent),if current qemu can't support 
> event notification
> mechanism in rhel6,from libvirt point of view,I don't clear libvirt how 
> to get asyns
> event notification?so I don't know how to test it.and I see qemu monitor 
> protocol being patched,I am not sure current QMP status. I would be most 
> grateful  for any response . thank you very much.

The QMP work is not yet finished. We only have basic support for the
protocol in QEMU right now. The next bit of work will be to add event
notifications fotr the disk error events, and spice/vnc client
connections. I don't know when that stuff will be ready though.

Testing is going to be quite alot of work - there's no way to test
this using virsh/virt-manger/etc. If you want to test this you will
need to write some code that uses the libvirt API directly to register
for events

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