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Hello,

I found that issue was wrong kernel taken from 
http://kernel.ubuntu.com/~kernel-ppa/mainline/
After installing lts kernel from xenial everything is working fine.

-- 
Pozdrawiam
Sławek Kapłoński
slawek at kaplonski.pl


W dniu 12.08.2016 09:56, Sławek Kapłoński napisał(a):

> Hello,
> 
> I'm using Ubuntu 14.04 with qemu 2.3 and libvirt 1.3.1. Last time I 
> also upgraded kernel to 4.4 version (from kernel.ubuntu.com). After 
> this upgrade I have an issue with live_snapshots in libvirt.
> 
> When nova makes live-snapshot, libvirt should add new rule to apparmor 
> rules for instance and then start „qemu drive-mirror" operation. 
> Problem is that rule added to apparmor is not „visible" by kernel.
> 
> When I added similar rule manually I had to reboot hard instance to 
> apply new rule (even if I made apparmor_parser -r ...). Similar issue 
> is when libvirt is addind new rule to apparmor.
> 
> Because of this issue qemu don't have permission to open „delta" file 
> and there is error.
> 
> Same issue not happen on kernel 3.13 - rule added by libvirt is 
> normally visible by apparmor and snapshot is created properly.
> 
> Maybe someone of You got already such issue and maybe You know any 
> solution to fix that?
> 
> Pozdrawiam
> Sławek Kapłoński
> slawek at kaplonski.pl
> 
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