[Dovecot] Dovecot pgsqlauthentication database reconnection/failover problem

[Frank Wang]

> On Sat, 2008-02-16 at 21:46 +0800, Frank Wang wrote:
> > Hi,
> >     Our mail system uses dovecot-1.0-1.2.rc15.el5 in Centos-5.1 as our
> > imap server. It connects to a pgsql database in another server as
> > authentication backend. It works fine except occasionally fails to
> > reconnect to the database after temporary network block, and dovecot has
> > to be restarted to work again in such case.
>
> It's most likely fixed in newer versions. For example there is one
> PostgreSQL fix in v1.0.4 and another in v1.0.rc26. There may be other
> fixes as well.
>
> You can find newer Dovecot RPMs for CentOS 5 from atrpms.net.
>
Thanks for the quick reply.
I've tested the  dovecot-1.0.10-0_66.el5 from atrpms.net. The reconnection 
problem hasn't occur during the test so far, good!  I'll need sometime to 
test the stability though, as it's marked test in the repo. 

> > Google led me to
> > http://www.dovecot.org/list/dovecot/2008-January/027899.html.  I followed
> > the thread to modify my dovecot-sql.conf containing "connect =
> > host=pgsql1 host=pgsql2 dbname=xxxx user=xxxx"
>
> Currently this works only with MySQL.
Is it possible to achieve similar failover using pgsql backend? As we had 
built other systems using the same pgsql database, migrate to mysql is not an 
option here.

Regards,
Frank Wang