Re: Heartbeat + pacemaker configuration for PostgreSQL log shipping

On Tue, Feb 22, 2011 at 2:26 AM, Jody McIntyre <jodym@trustcentric.com> wrote:
> Has anyone successfully configured heartbeat + pacemaker (or any other HA
> package for that matter) to control PostgreSQL in log shipping mode?  All
> the examples I've found use drbd.
>
> My current thinking is to start/stop the database as in a non HA setup
> (using upstart, since this is Ubuntu), and write a custom pacemaker resource
> agent such that:
>
> - "start" on the secondary creates a trigger file and waits for recovery to
> complete before returning success.  "stop" does nothing (returns success.)
> Pacemaker would be configured for manual failback.
> - "start" and "stop" on the primary does nothing.  We would STONITH the
> primary before taking over the database.
>
> Does this sound reasonable?

The resource agents for MySQL and DRBD have been implemented as
master/slave ones. So I think that the resource agent for PostgreSQL also
should be done the same way, i.e., you should implement only "start" and
"stop" but also "promote" and "demote".

Regards,

--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center