[ovirt-users] Communication Problems between Engine and Hosts

[Piotr Kliczewski]

Fernando,

Which ovirt version are you running? Please share the logs so I could
check what caused the hosts to become unresponsive.

Thanks,
Piotr

On Wed, Aug 2, 2017 at 5:11 PM, FERNANDO FREDIANI
<fernando.frediani at upx.com> wrote:
> Hello.
>
> Yesterday I had a pretty strange problem in one of our architectures. My
> oVirt which runs in one Datacenter and controls Nodes locally and also
> remotelly lost communication with the remote Nodes in another Datacenter.
> To this point nothing wrong as the Nodes can continue working as expected
> and running their Virtual Machines each without dependency of the oVirt
> Engine.
>
> What happened at some point is that when the communication between Engine
> and Hosts came back Hosts got confused and initiated a Live Migration of ALL
> VMs from one of the other. I had also to restart vdsmd agent on all Hosts in
> order to get sanity my environment.
> What adds up even more strangeness to this scenario is that one of the Hosts
> affected doesn't belong to the same Cluster as the others and had to have
> the vdsmd restarted.
>
> I understand the Hosts can survive without the Engine online with reduced
> possibilities but can communicated between them, but without affecting the
> VMs or even needing to do what happened in this scenario.
>
> Am I wrong on any of the assumptions ?
>
> Fernando
>
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