[Pacemaker] Pacemaker/Corosync on Ubuntu 12.04

[Andrew Martin]

----- Original Message -----
> From: "Robert Parsons" <rparsons at tappublishing.com>
> To: "The Pacemaker cluster resource manager" <pacemaker at oss.clusterlabs.org>
> Sent: Wednesday, May 1, 2013 4:03:46 PM
> Subject: [Pacemaker] Pacemaker/Corosync on Ubuntu 12.04
> 
> 
> 
> We're wanting to build a web server farm with approx 18 nodes. We're
> aware of scalability issues with Corosync/Pacemaker but we're also
> told
> that it is getting better with newer versions of the software. Ubuntu
> 12.04 is packaged with corosync 1.4.2 and pacemaker 1.1.6.  I imagine
> that we'll probably need to remove the packages and compile from
> source
> to get the later versions.  What is the latest version suitable for
> production?
> 
> Also, does anyone have any suggestion for tuning Corosync to scale to
> 18-24 nodes, running 18 services?
> 
> Thanks for any help.
> 
> --
> Robert Parsons
> Chief Information Officer
> TAP Publishing Company
> 174 Fourth St
> Crossville, TN 38557-0509
> 931-484-5137
> 
> 
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> 
Robert,

I have also been using Ubuntu 12.04 for Corosync/Pacemaker clusters. I've found 
that the feature series (1.1.x) of Pacemaker has too many changes/bugs to be used 
in a production environment, so I am waiting for the next stable series, 1.2.0. I
have also been working to build updated packages of Corosync and Pacemaker for
Ubuntu 12.04, which you can find in this PPA:
https://launchpad.net/~asmartin/+archive/cluster-stable

The Corosync 2.x series has some important improvements regarding quorum and 
membership data, so it is the version I would prefer to use in clusters going
forward. See this article for more information:
http://blog.clusterlabs.org/blog/2012/pacemaker-and-cluster-filesystems/

Thanks,

Andrew