[ovirt-users] Advise needed: building cheap HA oVirt cluster with just 2 physical servers

[Kai Wagner]

Nevertheless you could end up with a split brain situation because
you've no quorum.

So it doesn't matter which kind of cluster you want to build, but you'll
need a third node as a tiebreaker.

I know that a 2 node cluster with drbd would work, but not in all cases,
so do yourself a favor and get a third node.


On 03.11.2017 09:15, Johan Bernhardsson wrote:
>
> On drbd you have one master and use iscsi to share the storage. If the
> master fails it will fail over to the other.
>
> You have one up that will act as the iscsi storage and jump between
> the hosts.
>
> If you run drbd master master ... Then you might get split brain and
> that is not fun :)
>
> On November 3, 2017 09:04:49 Eduardo Mayoral <emayoral at arsys.es> wrote:
>
>> Just genuinely curious, how do you avoid split-brain situations with
>> a 2-node setup (be it drbd, gluster or anything else)?
>>
>> Eduardo Mayoral Jimeno (emayoral at arsys.es)
>> Administrador de sistemas. Departamento de Plataformas. Arsys internet.
>> +34 941 620 145 ext. 5153
>> On 03/11/17 08:40, Johan Bernhardsson wrote:
>>>
>>> Check on drbd. I have used that to build a cluster for two servers.
>>> It need some more work than a three node gluster conf but works well.
>>>
>>> I even think they have a white paper on how to do it for virtualization.
>>>
>>> /Johan
>>>
>>> On November 3, 2017 08:11:04 Artem Tambovskiy
>>> <artem.tambovskiy at gmail.com> wrote:
>>>
>>>> Looking for a design advise on oVirt provisioning. I'm running a
>>>> PoC lab on single bare-metal host (suddenly it was setup with just
>>>> Local Storage domain) and 
>>>> no I'd like to rebuild the setup by making a cluster of 2 physical
>>>> servers, no external storage array available. That are the options
>>>> here? is there any options to build cheap HA cluster with just 2
>>>> servers? 
>>>>
>>>> Thanks in advance!
>>>>
>>>> Artem
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>>>
>>>
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>
>
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