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

[Michael P. <mic...@gm...>]

On Mon, Jun 25, 2012 at 10:07 AM, Michael Paquier <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...> 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