[libvirt] Re: Libvir Xen and domain events

[Daniel P. Berrange]

On Fri, Oct 09, 2009 at 06:46:40PM -0400, Christopher Pyper wrote:
> I have been looking into registering some domain events though the  
> python Libvir API.  However, I am getting errors and I believe it may  
> be due to lack of event support in Xen.  This is the error I am getting:
> 
> libvir: Xen error : this function is not supported by the hypervisor:  
> xenUnifiedDomainEventRegister
> Traceback (most recent call last):
>   File "./testcallback.py", line 19, in ?
>     conn.domainEventRegister(callback,None)
>   File "/usr/lib64/python2.4/site-packages/libvirt.py", line 1578, in  
> domainEventRegister
>     if ret == -1: raise libvirtError ('virConnectDomainEventRegister 
> () failed', conn=self)
> libvirt.libvirtError: this function is not supported by the  
> hypervisor: xenUnifiedDomainEventRegister

The Xen driver does support events. I think this is probably a misleading
error message which in fact is trying to tell you that you need to provide
an event loop first.

Take a look at examples/domain-events/events-py.py for a good example
of how to use events. I've not tested it with Xen recently, but it ought
to work

Daniel
-- 
|: Red Hat, Engineering, London   -o-   http://people.redhat.com/berrange/ :|
|: http://libvirt.org  -o-  http://virt-manager.org  -o-  http://ovirt.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: GnuPG: 7D3B9505  -o-  F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|