[ovirt-users] Affinity

[Koen Vanoppen]

Ok, Super! Big thanks for your help!

2015-01-05 15:28 GMT+01:00 Artyom Lukianov <alukiano at redhat.com>:

> If you want that each vm will run on different host, you can:
> 1) just not pinned it to specific host(placement and migration options
> under vm properties)?
> 2) create two clusters, each cluster will have hosts from different
> physical datacenters, and for each cluster administrate different set of
> vms.
> 3) And in the end we have possibility to use external scheduler, so you
> can write your own python script, and use it as filter, weight or balance
> module for ovirt scheduler:
>    http://www.ovirt.org/Features/oVirt_External_Scheduling_Proxy
>    http://www.ovirt.org/External_Scheduler_Samples
>
>    You need to install package ovirt-scheduler-proxy and also enable it
> via engine-config -s ExternalSchedulerEnabled=True.
>    Also additional info you can find under cd
> /usr/share/doc/ovirt-scheduler-proxy*
>
> I hope it will help you.
> Thanks
>
> ----- Original Message -----
> From: "Koen Vanoppen" <vanoppen.koen at gmail.com>
> To: "Doron Fediuck" <dfediuck at redhat.com>, users at ovirt.org
> Sent: Monday, January 5, 2015 11:26:26 AM
> Subject: Re: [ovirt-users] Affinity
>
> Thanks for your reply. But I maybe explained it badly... All the 4
> hypervisors are in the same Datacenter on oVirt. But they are physically in
> a different datacenter.
> That is why I want to force them to run on a different hypervisor. IF 1
> physical datacenter would go down (electricity power failure or whatever)
> At least one VM will continue to run.
>
> 2015-01-05 10:21 GMT+01:00 Doron Fediuck < dfediuck at redhat.com > :
>
>
>
>
> On 05/01/15 10:54, Koen Vanoppen wrote:
>
>
>
> Hi All,
>
> First of all, let me say a Happy New Year with all the best wishes!!
>
> Now, let's get down to business :-).
>
> I would lik eto implement the Affinity option in our datacenter.
> 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...
> 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;
>
> Hyp1 -> Datacenter1
> Hyp2 -> Datacenter2
> Hyp3 -> Datacenter1
> Hyp4 -> Datacenter2
>
> 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...
> Is this possible...?
>
> Kind regards,
>
> Koen
>
>
> Hi Koen.
>
> VMs cannot move between data centers while still running.
> Just to provide some basic concepts in terms of hierarchy, we have:
>
> Data-Center1
> |
> |\ Cluster A
> | |
> | |\ Host (a)
> | |\ Host (b)
> |
> |\ Cluster B
> | |
> | |\ Host (c)
> | |\ Host (d)
> | |\ Host (e)
>
> Data-Center2
> |
> |\ Cluster A
> | |
> | |\ Host (f)
> |
> |\ Cluster B
> | |
> | |\ Host (g)
> | |\ Host (h)
> | |\ Host (i)
>
> As you can see, a host may be a part of a single cluster and a VM
> will run on one of the hosts. Live migration can be done between
> hosts of the same cluster. The only way to move VM between clusters
> and DCs are when the VM is down, in a manual way.
>
> So Affinity works in the cluster level, and the rules are valid for a
> specific cluster who currently owns the VM.
> In your case if Hyp1 and Hyp3 belong to the same cluster, the affinity
> rules will apply every time you start or migrate a VM. However, there's
> no rule which is valid for Datacenter1 and Datacenter2.
>
> HTH,
> Doron
>
>
> _______________________________________________
> Users mailing list
> Users at ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ovirt.org/pipermail/users/attachments/20150106/822ae379/attachment-0001.html>