Re: [libvirt-users] Snapshots - can't take a snapshot with running VM
On 15/06/10 17:53, Julian Robbins wrote:
> > Can I really only create snapshots of a vm when it isnt
running ?
> No, you should be able to take a snapshot both while it is running and
> while it is off. However, they use different mechanisms so there
> could be
> a bug in the online version. What version of qemu/kvm are you running?
> Also, do you have apparmor enabled/running? If so, and if the
> apparmor policy
> hasn't been updated, that might be the source of your problems.
I've disabled AppArmor for now and it works fine, so there is some
unwanted issue there. Strangely, looking again apparmor is still
enabled when guest is running after reboot. Possibly rebooting the
guest and using dynamic appamor instead of static has helped ?
I'm using vers 1.84 of QEMU/Kvm from dnjl's PPA for Lucid.
After trying again, I can no longer get snapshots to work whilst vm
guest in running.
I have disabled apparmor so that it is only in 'complain' mode on the
host, but still get :-
Error -5 while writing VM
whilst trying a
virsh # snapshot-create openerp
Whether running virsh as normal user or root. I'm also getting
'libvirtError: Timed out during operation: cannot acquirestate change lock' errors
too, after I've tried to take a snapshot.
So it appears that perhaps there is a bug where snapshots cannot always
be made online. I have taken some successful snapshots online, but none
recently.
Interestingly, I can never get the 'Security' setting in the guest to
stick to be 'none' for the apparmor Model either static or dynamic. Even
after a reboot of the guest, the setting stays always to dynamic.
Hoping someone can help - don't want to leave using KVM/libvirt .....
--
Kind regards
Julian