[ovirt-users] VM get stuck randomly

[Yaniv Kaul]

On Sun, Mar 13, 2016 at 9:46 AM, Christophe TREFOIS <
christophe.trefois at uni.lu> wrote:

> Dear all,
>
> I have a problem since couple of weeks, where randomly 1 VM (not always
> the same) becomes completely unresponsive.
> We find this out because our Icinga server complains that host is down.
>
> Upon inspection, we find we can’t open a console to the VM, nor can we
> login.
>

I assume 3.6's console feature, or is it Spice/VNC?


>
> In oVirt engine, the VM looks like “up”. The only weird thing is that RAM
> usage shows 0% and CPU usage shows 100% or 75% depending on number of cores.
>

Any chance there's really something bad going on within the VM? Anything in
its journal or /var/log/messages or ... depending on the OS?
Y.



> The only way to recover is to force shutdown the VM via 2-times shutdown
> from the engine.
>
> Could you please help me to start debugging this?
> I can provide any logs, but I’m not sure which ones, because I couldn’t
> see anything with ERROR in the vdsm logs on the host.
>
> The host is running
>
> OS Version:             RHEL - 7 - 1.1503.el7.centos.2.8
> Kernel Version: 3.10.0 - 229.14.1.el7.x86_64
> KVM Version:            2.1.2 - 23.el7_1.8.1
> LIBVIRT Version:        libvirt-1.2.8-16.el7_1.4
> VDSM Version:   vdsm-4.16.26-0.el7.centos
> SPICE Version:  0.12.4 - 9.el7_1.3
> GlusterFS Version:      glusterfs-3.7.5-1.el7
>
> We use a locally exported gluster as storage domain (eg, storage is on the
> same machine exposed via gluster). No replica.
> We run around 50 VMs on that host.
>
> Thank you for your help in this,
>
> —
> Christophe
>
>
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>
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