[Pacemaker] stonith and avoiding split brain in two nodes cluster

[emmanuel segura]

I have a production cluster, using two vm on esx cluster, for stonith i'm
using sbd, everything work fine


2013/3/25 emmanuel segura <emi2fast at gmail.com>

> I have a production cluster, using two vm on esx cluster, for stonith i'm
> using sbd, everything work find
>
> 2013/3/25 Angel L. Mateo <amateo at um.es>
>
>> Hello,
>>
>>         I am newbie with pacemaker (and, generally, with ha clusters). I
>> have configured a two nodes cluster. Both nodes are virtual machines
>> (vmware esx) and use a shared storage (provided by a SAN, although access
>> to the SAN is from esx infrastructure and VM consider it as scsi disk). I
>> have configured clvm so logical volumes are only active in one of the nodes.
>>
>>         Now I need some help with the stonith configuration to avoid data
>> corrumption. Since I'm using ESX virtual machines, I think I won't have any
>> problem using external/vcenter stonith plugin to shutdown virtual machines.
>>
>>         My problem is how to avoid split brain situation with this
>> configuration, without configuring a 3rd node. I have read about quorum
>> disks, external/sbd stonith plugin and other references, but I'm too
>> confused with all this.
>>
>>         For example, [1] mention techniques to improve quorum with scsi
>> reserve or quorum daemon, but it didn't point to how to do this pacemaker.
>> Or [2] talks about external/sbd.
>>
>>         Any help?
>>
>> PS: I have attached my corosync.conf and crm configure show outputs
>>
>> [1] http://techthoughts.typepad.**com/managing_computers/2007/**
>> 10/split-brain-quo.html<http://techthoughts.typepad.com/managing_computers/2007/10/split-brain-quo.html>
>> [2] http://www.gossamer-threads.**com/lists/linuxha/pacemaker/**78887<http://www.gossamer-threads.com/lists/linuxha/pacemaker/78887>
>>
>> --
>> Angel L. Mateo Martínez
>> Sección de Telemática
>> Área de Tecnologías de la Información
>> y las Comunicaciones Aplicadas (ATICA)
>> http://www.um.es/atica
>> Tfo: 868889150
>> Fax: 868888337
>>
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>>
>
>
> --
> esta es mi vida e me la vivo hasta que dios quiera




-- 
esta es mi vida e me la vivo hasta que dios quiera
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