[libvirt] Intro to libvirt-TCK (Technology Compatibility Kit)

[Daniel P. Berrange]

On Sun, Apr 12, 2009 at 11:18:36AM -0700, Dale Bewley wrote:
> On Wed, 2009-04-08 at 19:32 +0100, Daniel P. Berrange wrote:
> >    libvirt TCK  : Technology Compatibility Kit
> 
> Amazing :)
> 
> > Even these 4 simple proof of concept scripts have highlighted
> > some horrible problems
> > 
> >  - The QEMU driver 'define domain' method doesn't check for name
> >    or UUID uniqueness correctly (well, at all)
> > 
> >  - After starting an inactive domain, the remote driver does not
> >    update the 'ID' field in the virDomainPtr
> > 
> >  - After destroying a active domain, the remote driver does not
> >    update the 'ID' field in the virDomainPtr
> > 
> >  - When defining a persistent config for an already running domain
> >    the Xen XM driver blows away the current 'ID' field for the
> >    running domain, replacing it with -1.
> 
> I've seen this. I hope some fixes can be back-ported or are sufficiently
> distinct that users can patch older libvirt releases.
> 
> Since I have non-HVM hardware and am using F8 for Xen, I often run into
> a loss of state information about a domain in libvirt.
> https://bugzilla.redhat.com/show_bug.cgi?id=453276

Well unfortunately F8 is EOL, so no further updates can be pushed
there. It would be possible for you to build the new libvirt releases
and deploy them on F8 though. We still support the F8 era Xen builds
with new libvirt upstream releases, even if we don't do official F8
updates in Fedora world.

> Restarting xend sometimes helps, but frequently winds up causing another
> domain to show up as "unknown" in virsh and sometimes a domain will
> crash. 

Ah, well is possibly slightly different from the problem I describe,
since in F8  XenD itself tracks inactive guests. The problem I describe
is for even older Xen, where libvirt  tracks inactive guests.

This test suite should help identify & resolve the problems  you see
though

Daniel
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