[Pacemaker] is a single node cluster possible?

Michael Schwartzkopff misch at clusterbau.com
Wed Aug 31 06:43:45 EDT 2011

> I have a need to create single node clusters with pacemaker.
> Crazy you might say.  It does seem crazy at first but there are two
> drivers for this:
> The first is testing.  I want to write a single code path for
> controlling the starting and stopping of resources in larger, real,
> multi-node clusters controlled with pacemaker.
> The second, more practical reason is that we want to be able to deploy
> machines that are scalable from 1 upwards, without having to completely
> reconfigure the way services are started and stopped when the deployment
> grows from their single node to multiple nodes for the same set of
> services.  Again, having a single code path for all of this is desirable.
> I noted this thread back in 2008:
> http://oss.clusterlabs.org/pipermail/pacemaker/2008-August/000281.html
> At that time it was theoretically possible with a "null" comm plugin
> which would be used instead of talking to HB or openais.
> Has anything changed on this front?
> Has anyone used pacemaker in this configuration who might want to share
> their recipe(s) with me?
> Thanks and cheers,
> b.

Its is possible. Just install and configure the software.

Dr. Michael Schwartzkopff
Guardinistr. 63
81375 München

Tel: (0163) 172 50 98
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