[Pgpool-general] pgpool-ha and pg9 Streaming replication issue

[Tatsuo Ishii]

Maybe pgpool-ha is not yet ready for streaming replication.
Haruka?
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese: http://www.sraoss.co.jp

> Hi all,
> 
> I have 2 servers running postgres9 with streaming replication.
> On both nodes I have configured pgpool which are managed by pgpool-ha
> using heartbeat.
> 
> Now let's assume the following 
> 
> Node 0 is primary DB and running pgpool2
> Node 1 is standby DB
> 
> Now let's say I pull out the power for node0
> Heartbeat detects that node down and will fail-over the Virtual-IP and
> the pgpool2 instance as expected.
> 
> However pgpool does not like to promote the slave to primary in this
> case.
> 
> The log will show the following:
> 
> 2011-02-01 16:48:05 LOG:   pid 7837: pgpool-II successfully started.
> version 3.1.0-alpha1 (umiyameboshi)
> 2011-02-01 16:48:05 LOG:   pid 7837: find_primary_node: 1 node is
> standby
> 2011-02-01 16:48:05 LOG:   pid 7837: find_primary_node: no primary node
> found
> 
> Shouldn't pgpool2 promote the standby to primary as soon as he does not
> detect a primary node in the cluster.
> 
> I was thinking to run 2 instances at once and just used the Virtual-IP,
> however I'm not sure if this will work since these instances do not know
> about each other.
> 
> Thanks 
> 
> Wouter