[PVE-User] Best practice for quorum device between data centers?

Thomas Naumann tom at chajuti.de
Fri Feb 28 13:36:24 CET 2020


unfortunatly there is no independent third location

On 2/28/20 9:48 AM, Aaron Lauterer wrote:
> Any thoughts about using QDevice with the corosync-qnetd service running 
> in a third location?
> 
> AFAIK the QDevice mechanism can cope with higher latencies than corosync 
> itself.
> 
> On 2/27/20 10:03 PM, John Thomas wrote:
>> Maybe have a tiny PVE at a third location (call it PVE-quorum)?  That 
>> way,
>> if one data center goes off line, you have the solution you need, the 
>> "up"
>> data center still having a quorum.
>>
>> JT
>>
>>
>>
>> On Thu, Feb 27, 2020 at 12:05 PM Alexandre DERUMIER <aderumier at odiso.com>
>> wrote:
>>
>>> Well you could use a virtual quorum vm, but
>>>
>>>
>>> dc1: 4 nodes + vm ha   dc2: 4nodes
>>>
>>> you loose dc1 -> you loose quorum on dc2, so you can't start vm on dc2.
>>> so it's not helping.
>>>
>>> you really don't want to use HA here. but you can still play with "pvecm
>>> expected" to get back the quorum
>>> if 1 dc is down.  (and maybe do dc1: 5 nodes  - dc2: 4 nodes, to avoid
>>> loose quorum on both side)
>>>
>>>
>>> (also I don't known what is your storage ? )
>>>
>>>
>>> ----- Mail original -----
>>> De: "Thomas Naumann" <tom at chajuti.de>
>>> À: "proxmoxve" <pve-user at pve.proxmox.com>
>>> Envoyé: Jeudi 27 Février 2020 20:29:45
>>> Objet: Re: [PVE-User] Best practice for quorum device between data 
>>> centers?
>>>
>>> hi alex,
>>>
>>> thanks for your response...
>>> that was our first idea too, but i don´t like it...
>>> what about the idea of a virtual quorum device (VM) inside the cluster?
>>> in worst case scenario (all physical connections between data centers
>>> are broken) where will be manual choise to start virtual quorum on this
>>> or that side of the cluster. Has anyone experience about this?
>>>
>>> regards,
>>> thomas
>>> On 2/27/20 6:49 PM, Alex Chekholko via pve-user wrote:
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