[Pacemaker] Automating Pacemaker Setup

[Dejan Muhamedagic]

On Tue, May 31, 2011 at 02:02:38PM +0000, veghead wrote:
> Dejan Muhamedagic <dejanmm at ...> writes:
> > On Fri, May 27, 2011 at 08:21:08PM +0000, veghead wrote:
> > > 1) Is there a way to force crm to accept my configuration request 
> > > ~before~ starting the second node?
> > 
> > No before the DC is elected. There are two settings: dc-deadtime
> > and startup-fencing which can reduce the time for DC election.
> > Note that disabling startup fencing is not recommended. But I
> > don't know what's your use case. YMMV.
> 
> Well, I'm probably not quite the typical use case. We're using Amazon EC2 to 
> setup and tear down testing environments. I have automated the entire process 
> except for setting up Pacemaker. Beyond testing environments, I'd like to 
> automate Pacemaker setup to cover the scenario where all nodes in a Pacemaker 
> cluster crash and the entire configuration is lost.
> 
> Obviously, once one node is running, setting up additional nodes becomes easy. 
> It's just the bootstrap phase that's a challenge to automate.
> 
> > > 2) Is there a way to tell Pacemaker to ignore quorum requirements
> > > ~before~ starting additional nodes?
> > > 
> > > 2) Is there an alternate way to configure Pacemaker?
> > 
> > Yes, you can modify the CIB _before_ starting pacemaker. Sth
> > like:
> > 
> > CIB_file=/var/lib/heartbeat/crm/cib.xml crm configure ...
> > 
> > But in that case you need to remove cib.xml.sig. Then you have to
> > make sure that pacemaker starts first on this node. Consider this
> > only if everything else fails.
> 
> I'll give that a shot.

You can also test the attached patch. Either rebuild pacemaker or
apply it to the crm python modules which should be installed in
/usr/lib*/python*/site-packages/crm.

Afterwards, use crm -F or commit force.

Thanks,

Dejan

> Thanks.
> 
> -S
> 
> 
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