[Users] Unable to run VM with ”opening backend ‘pyt’ failed”

[Romain LE DISEZ]

Hi all,

I had a similar problem. I'm using the RPM for CentOS at dreyou.org.

I found that SELinux denies access to the ISO on NFS to libvirt/qemu.
Using audit2allow, I found that there is a boolean for that.

Running this command on the nodes fixed it for me:
    setsebool virt_use_nfs 1

Greetings.


Le mardi 17 juillet 2012 à 09:16 +0200, Martin Kletzander a écrit :
> On 07/17/2012 02:41 AM, Mark Wu wrote:
> > On 07/16/2012 09:46 AM, xuejie chen wrote:
> >> 			<source file="/rhev/data-center/2d7df94d-738d-4d7d-97a4-dd5027a4bf25/d3267b58-cbbd-4e6e-8685-8acd152d49a1/images/7e1011e0-d0ac-4c1f-bd09-a19e450c3259
> > Please upgrade vdsm to 4.10.0 as Dan suggested above.  If the problem
> > still exists, please:
> > 
> > check the owner and permission of that image file:
> > 
> > ls -l /rhev/data-center/2d7df94d-738d-4d7d-97a4-dd5027a4bf25/d3267b58-cbbd-4e6e-8685-8acd152d49a1/images/7e1011e0-d0ac-4c1f-bd09-a19e450c3259/9c728c1d-762e-4670-9076-9ca5a37b6354
> > 
> > Run "setenforce 0" to disable selinux and see if it helps:
> > 
> 
> As Mark pointed out, checking the permissions should be enough, so
> "ls -lZ" will do. I don't know if "Local on host" means exactly what I
> think, but in case it's not managed using vdsm, that directory may need
> to me mounted from somewhere, libvirt itself doesn't do that (unless
> it's in network filesystem pool).
> 
> In case this goes down to a problem in libvirt, feel free to say what's
> wrong and I'll see what I can do about it.
> 
> Martin
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-- 
Romain LE DISEZ