[ovirt-users] Communication Problems between Engine and Hosts

[FERNANDO FREDIANI]

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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