[ClusterLabs] rhel7 cluster split brain issue

[Digimer]

On 14/09/15 03:27 AM, Michael Schwartzkopff wrote:
> Am Montag, 14. September 2015, 09:25:23 schrieb Vagi Attila:
>> Hi List,
>>
>> I have a 2 node pacemaker/corosync cluster with shared LVM storage, using
>> LVM tagging. LVM tagging is configured for exclusive access.
>>
>> In case of loss of interconnect both nodes become active. How can one
>> avoid this behavior?
>>
>> Thanks for your help in advance!
>>
>> Mit freundlichem Gruss/Best regards,
>>
>>   Attila
> 
> Fencing!
> 
> http://clusterlabs.org/doc/crm_fencing.html
> 
> Mit freundlichen Grüßen,
> 
> Michael Schwartzkopff

This is the correct answer.

All HA clusters, regardless of use-case, require fencing to operate
properly. How you fence depends on your environment/hardware, but IPMI
and switched PDU fencing are most common. If you want further advice,
please tell us about your environment/hardware.

-- 
Digimer
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