troubles copying qcow2 VM images

[Serge E. Hallyn]

Quoting jurgen.depicker at let.be (jurgen.depicker at let.be):
> "Serge E. Hallyn" <serge.hallyn at ubuntu.com> wrote on 14/03/2011 22:54:55:
> 
> > From: "Serge E. Hallyn" <serge.hallyn at ubuntu.com>
> > To: jurgen.depicker at let.be
> > Cc: "Serge E. Hallyn" <serge.hallyn at ubuntu.com>, David Peall 
> > <david at dnservices.co.za>, ubuntu-server at lists.ubuntu.com
> > Date: 14/03/2011 22:55
> > Subject: Re: troubles copying qcow2 VM images
> > 
> > Quoting jurgen.depicker at let.be (jurgen.depicker at let.be):
> > > When trying to start the VM on VLET3, the VM hangs immediately at 
> boot, 
> > > with following messags in /var/log/messages:
> > > Mar 14 21:21:30 VLET3 kernel: [255777.604342] type=1400 
> > > audit(1300134090.205:39): apparmor="STATUS" operation="profile_load" 
> > > name="libvirt-02f97acb-d586-4eb9-9f59-e1df7a3cd647" pid=29124 
> > > comm="apparmor_parser"
> > > Mar 14 21:21:30 VLET3 libvirtd: 21:21:30.803: warning : 
> > > qemudParsePCIDeviceStrs:1422 : Unexpected exit status '1', qemu 
> probably 
> > 
> > ...
> > 
> > > > Can you sha1sum {/mnt/nfs,/srv/VMs/}/VM1.qcow2?  My guess is this is 
> an
> > > > NFS bug with large file xfer corruption.
> > > > 
> > > > -serge
> > > 
> > > Great, I didn't think of that one before!  I thought that was it, but, 
> 
> > > unfortunately, I ran sha1sum on VLET1 and VLET3's copies, and both 
> give 
> > > the same checksum.
> > > I really really don't understand this...  Is there some 'magic' 
> associated 
> > > with qcow2 images, so you need to copy them in a special way?  But 
> since 
> > > the sha1sums are identical...
> > > The funny thing is, most of these images were VMWare images which I 
> > > converted.  They were first stored on other systems, and I could copy 
> the 
> > > qcow2 images to VLET1 and they all worked fine.  But now it seems 
> > > impossible to move them...
> > 
> > A-ha - Did you update the apparmor profile for that libvirt
> > instance so that it can access the file in the new location?
> 
> Could you please provide some more info about this?  I found some info on 
> https://apparmor.wiki.kernel.org/index.php/Libvirt but I'm completely 
> inexperienced with apparmor...
> 
> Thanks a lot!!

Hi,

as mentioned on IRC, please see /usr/share/doc/libvirt-bin/README.Debian.gz
and search for 'apparmor'.  If you'd still like some help, then please
reply with all the possible pathnames by which a VM's root disk might be
accessed, and the contents of your /etc/apparmor.d/libvirt/TEMPLATE and
/etc/apparmor.d/libvirt/<uuid>* file (uuid being the uuid of a vm which
failed to start).

thanks,
-serge
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