[libvirt-users] Need help using libvirt with qcow2 delta and base images

[jeremy avnet]

On Tue, Apr 20, 2010 at 11:01 AM, Wang David <David_Wang at prn.com> wrote:

> Apr 19 17:27:36 virtualserver3 kernel: [14202.411373] type=1503
> audit(1271723256.513:75): operation="open" pid=3147 parent=1
> profile="libvirt-20030353-cdee-109a-1abb-dc4971d036c2" requested_mask="r::"
> denied_mask="r::" fsuid=0 ouid=0
> name="/data/virtual/var/lib/libvirt/images/ubuntu910server64.qcow2"
> Apr 19 17:27:36 virtualserver3 libvirtd: 17:27:36.718: error :
> qemudWaitForMonitor:1103 : internal error unable to start guest: qemu: could
> not open disk image
> /var/lib/libvirt/images/ubuntu910server64_delta.qcow2#012
>

These indicate that AppArmor is denying access to the backing store, thus,
your delta image will not work.

You're going to need add a rule
into /etc/apparmor.d/abstractions/libvirt-qemu so that the backing store can
be read. Something like:

  /data/virtual/var/lib/libvirt/images/ubuntu910server64.qcow2 r,

or

  /data/virtual/var/lib/libvirt/images/* r,

.:. jeremy
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