[Pacemaker] MySQL/PostgreSQL HA cluster with Pacemaker

Andrew Beekhof andrew at beekhof.net
Wed Oct 31 21:02:54 EDT 2012

On Thu, Nov 1, 2012 at 5:27 AM, Andrew <nitr0 at seti.kr.ua> wrote:
> Hi all.
> I try to build 1+1 MySQL HA cluster, and currently I'm looking on Percona
> replication manager; other variant - to write own OCF for semi-synchronous
> master-slave replication. Also I want to run here PostgreSQL HA DB.
> So I have some questions:
> 1) How pacemaker decides what node should be master, when both nodes booting
> after, for ex., power failure? First running node will become a master, or
> Pacemaker can wait some time till node, that was a master before crash, will
> be running?

We run monitor on both nodes.
This is the chance for the resource agent script to tell us their
preference for being promoted to master.
We then factor that into our decision.

> 2) Is there a solution that may be better for data integrity?
> 3) What solutions are present for Postgres excluding classical DRBD
> solution?
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