[Pacemaker] how to mount drive on SAN with pacemakerresourceagent?

[Brett Delle Grazie]

>From memory you can use resource (SAN) fencing - that is you can
terminate other nodes connection to the SAN via the SAN switch or the
SAN controller itself.  This can be used as a primary fencing
mechanism and will prevent data loss in the contexts you mention.

On 7 January 2011 08:38, Robert van Leeuwen <vanleeuwen at stone-it.com> wrote:
>> In a simple case, we want to prevent two nodes using a shared file-system
>> without coordination.  If they loose contact with each other and can't
>> coordinate their access, one must die.  (Even if you make it hard for them to
>> loose contact by providing multiple communication channels, you have to assume
>> it will happen and, so, we work with this case.)
>
> Not a real help but...
> My preferred way is to create a 3 node cluster even if one node is only for voting and will not run any resources.
> With 3 nodes you can correctly "vote" about who's online & offline (2 vs 1 vote).
> When none of the 3 nodes see each others quorum will be lost on all nodes and the cluster will freeze (or whatever you configure).
>
> Some cluster suites use a quorum disk for the creating the 3rd vote but as far as I know Pacemaker does not support this.
>
> I'm afraid if a third node is not possible you will have to make absolutely sure the network link stay's up but it won't be 100% fool proof if somebody starts messing with the cables...
> (you're best bet will be multi-path + cross cable e.g.)
>
>
> Robert
>
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-- 
Best Regards,

Brett Delle Grazie