On Fri, Mar 20, 2015 at 10:03:20AM +0000, Stefan Hajnoczi wrote:
Hi Stefan, thank you very much for answering me.
> On Wed, Mar 18, 2015 at 04:53:28PM +0100, Francesc Guasch wrote:
> > I have three Ubuntu Server 14.04 trusty with KVM. Two of
> > them are HP servers and one is Dell. Both brands run fine
> > the KVM virtual servers, and I can do live migration between
> > the HPs. But I get I/O errors in the vda when I migrate to
> > or from the Dell server.
> >
> > I have shared storage with NFS, mounted the same way in all
> > of them:
> >
> > As soon as it starts in the origin console I spot I/O error
> > messages, when it finishes I got them in the console in the
> > destination server. The file system is read only and I have to
> > shut it down hard.
> >
> > end request I/O error, /dev/vda, sector 8790327
>
> "origin console" == guest's console?
Yes, I mean I open two consoles with virt-manager, one in
the origin host and another one in the destination
>
> I/O errors starting while the guest is still running on the migration
> source host is strange. I wonder if something happened to the NFS file
> related to file permissions or SELinux labels?
I think I found something checking SELinux. ls -Z and getfattr
return nothing. But ps -eZ showed something very different
in the Dell server.
This is in the HP server:
/usr/sbin/libvirtd 1034 ? 11:51:44 libvirtd
libvirt-09540b5d-82 701 ? 05:28:40 qemu-system-x86
unconfined 1 ? 00:01:00 init
In the Dell server init is confined in lxc and there are also
lxc-start processes.
/usr/sbin/libvirtd 1622 ? 05:07:07 libvirtd
libvirt-8a0f9087-32d... 29926 ? 00:00:01 qemu-system-x86
lxc-container-default 1774 ? 00:00:00 init
/usr/bin/lxc-start 1763 ? 00:00:00 lxc-start
There is also LXC installed in that server ! Maybe that is messing
with kvm. The qemu processes look fine to me but there is a chance
the problem comes from there.
I could move the LXC somewhere else or I can keep it there to
try to fix this issue. What do you advice I should do now ?
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