Re: [Postgres-xc-general] createdb: database creation failed: ERROR: Failed to get pooled connections

[Neil M. <nm...@xu...>]

Thanks to all for the tips, all up and running now !

PS , on the short version of documentation, it does not mentioned the HOST parameter:

http://postgres-xc.sourceforge.net/docs/1_0/install-short.html

Though I am guessing it all works fine when installed on the same machine

Thanks again

Neil
________________________________________
From: Michael Paquier [mic...@gm...]
Sent: Monday, June 25, 2012 2:09 AM
To: Neil Mooney
Cc: pos...@li...
Subject: Re: [Postgres-xc-general] createdb: database creation failed: ERROR: Failed to get pooled connections

On Mon, Jun 25, 2012 at 10:07 AM, Michael Paquier <mic...@gm...<mailto:mic...@gm...>> wrote:
I may be stepping someone's else answer... But here is some input.

On Fri, Jun 22, 2012 at 9:30 PM, Neil Mooney <nm...@xu...<mailto:nm...@xu...>> wrote:
Can anyone point out where I am going wrong here ?

Here is a complete log of what i've done to setup , error at the end:

Data/Coordinator machines:
==========================

node1:
======

rm -fr /opt/postgres/data*

mkdir -p /opt/postgres/data_coordinator1
mkdir -p /opt/postgres/data_datanode1

chown postgres: /opt/postgres/data_*

su - postgres

initdb -D /opt/postgres/data_coordinator1 --nodename coordinator1
initdb -D /opt/postgres/data_datanode1 --nodename datanode1

#configure /opt/postgres/data_coordinator1/postgres.conf with GTM server
#configure /opt/postgres/data_datanode1/postgres.conf with GTM server


postgres -X -p 15432 -D /opt/postgres/data_datanode1 >>logfile 2>&1 &
postgres -C -D /opt/postgres/data_coordinator1 >>logfile 2>&1 &

node2:
======

rm -fr /opt/postgres/data*

mkdir -p /opt/postgres/data_coordinator2
mkdir -p /opt/postgres/data_datanode2

chown postgres: /opt/postgres/data_*

su - postgres

initdb -D /opt/postgres/data_coordinator2 --nodename coordinator2
initdb -D /opt/postgres/data_datanode2 --nodename datanode2

#configure /opt/postgres/data_coordinator2/postgres.conf with GTM server
#configure /opt/postgres/data_datanode2/postgres.conf with GTM server

postgres -X -p 15433 -D /opt/postgres/data_datanode2 >>logfile 2>&1 &
postgres -C -D /opt/postgres/data_coordinator2 >>logfile 2>&1 &

each coordinator node:
======================

postgres -C -D /opt/postgres/data_coordinator1 >>logfile 2>&1 &
You already started your nodes at an earlier step, so this is not necessary.
An error would be returned telling that node is already started like postgres.
GTM machine:
=============

rm -fr /opt/postgres/data*

mkdir -p /opt/postgres/data_gtm

chown postgres: /opt/postgres/data*

su - postgres

initgtm -D /opt/postgres/data_gtm -Z gtm
gtm -D /opt/postgres/data_gtm >logfile 2>&1 &
You should start GTM before starting your 2 Coordinators and your 2 Datanodes.
Postgres-XC nodes need to register on GTM at start-up or they cannot start.


Registering Nodes: (all datanodes ??? has been done on both, output below)
==================

psql -c "CREATE NODE datanode1 WITH (TYPE = 'datanode', PORT = 15432)" postgres
psql -c "CREATE NODE datanode2 WITH (TYPE = 'datanode', PORT = 15433)" postgres
psql -c "SELECT pgxc_pool_reload()" postgres
select oid,node_name from pgxc_node;

Here you have to launch CREATE NODE and pgxc_pool_reload on each Coordinator. When you start up a node this node knows only about itself, so you need to register all the other Coordinators and Datanodes. Registering other Coordinators on a Coordinator is mandatory or you won't be able to synchronize DDL among Coordinators, this could result in a table being created on a Coordinator and not another.

So, in your case, launch the following queries:
- On Coordinator 1:
CREATE NODE datanode1 WITH (TYPE = 'datanode', PORT = 15432, HOST = '$node1_ip');
CREATE NODE datanode2 WITH (TYPE = 'datanode', PORT = 15433, HOST = '$node2_ip');
CREATE NODE coordinator2 WITH (TYPE = 'coordinator', PORT = 5432, HOST = '$node2_ip');
- On Coordinator 2:
CREATE NODE datanode1 WITH (TYPE = 'datanode', PORT = 15432, HOST = '$node1_ip');
CREATE NODE datanode2 WITH (TYPE = 'datanode', PORT = 15433, HOST = '$node2_ip');
CREATE NODE coordinator1 WITH (TYPE = 'coordinator', PORT = 5432, HOST = '$node2_ip');
There is a mistake here. On Coordinator 2, coordinator1 should be registered with a host set to $node1_ip, resulting in:
CREATE NODE coordinator1 WITH (TYPE = 'coordinator', PORT = 5432, HOST = '$node1_ip');
--
Michael Paquier
http://michael.otacoo.com