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<div class="moz-cite-prefix">On 05/01/15 10:54, Koen Vanoppen wrote:<br>
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<div>Hi All,<br>
<br>
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First of all, let me say a Happy New Year with
all the best wishes!!<br>
<br>
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Now, let's get down to business :-).<br>
<br>
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I would lik eto implement the Affinity option in
our datacenter.<br>
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I already activated it, put the 2 vms in it and set
in on negative so they won't run together on the
same hypervisor. Now, the question...<br>
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Is there a way I can force the VM's so they will run
on a hypervisor that is not in the same datacenter? We
have this;<br>
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Hyp1 -> Datacenter1<br>
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Hyp2 -> Datacenter2<br>
Hyp3 -> Datacenter1<br>
Hyp4 -> Datacenter2<br>
<br>
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For the moment they run on a different Hypervisor, but they
are in the same Datacenter. I can manually now move them to
the other one, but I would like this that oVirt manages
this...<br>
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Is this possible...?<br>
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Kind regards,<br>
<br>
Koen<br>
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Hi Koen.<br>
<br>
VMs cannot move between data centers while still running.<br>
Just to provide some basic concepts in terms of hierarchy, we have:<br>
<br>
Data-Center1<br>
|<br>
|\ Cluster A<br>
| |<br>
| |\ Host (a)<br>
| |\ Host (b)<br>
|<br>
|\ Cluster B<br>
| |<br>
| |\ Host (c)<br>
| |\ Host (d)<br>
| |\ Host (e)<br>
<br>
Data-Center2<br>
|<br>
|\ Cluster A<br>
| |<br>
| |\ Host (f)<br>
|<br>
|\ Cluster B<br>
| |<br>
| |\ Host (g)<br>
| |\ Host (h)<br>
| |\ Host (i)<br>
<br>
As you can see, a host may be a part of a single cluster and a VM<br>
will run on one of the hosts. Live migration can be done between<br>
hosts of the same cluster. The only way to move VM between clusters<br>
and DCs are when the VM is down, in a manual way.<br>
<br>
So Affinity works in the cluster level, and the rules are valid for
a<br>
specific cluster who currently owns the VM.<br>
In your case if Hyp1 and Hyp3 belong to the same cluster, the
affinity<br>
rules will apply every time you start or migrate a VM. However,
there's<br>
no rule which is valid for Datacenter1 and Datacenter2.<br>
<br>
HTH,<br>
Doron<br>
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