Date: Tue, 23 May 2006 08:39:10 +0300 (EEST)
From: Achilleus Mantzios <achill@matrix.gatewaynet.com>
To: Mark Fenbers <Mark.Fenbers@noaa.gov>
cc: pgsql-sql@postgresql.org
Subject: Re: Does PG have a database
In-Reply-To: <4471E6B9.9080002@noaa.gov>
Message-ID: <Pine.LNX.4.44.0605230838060.482-100000@matrix.gatewaynet.com>
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O Mark Fenbers έγραψε στις May 22, 2006 :

> I have working PostgreSQL databases on 3 of my ~30 Linux boxes.  I want 
> my software to be able to determine which of my 30 boxes have functional 
> databases on them.  Since Pg is part of the baseline distro, merely 
> checking for the existence of an executable doesn't solve my problem.
> 
> I tried looping through my list of hosts and running the command:
>     psql -h $host --list
> but this fails on a box with a database with the same error code as on a 
> box that doesn't have a database, if my PGUSER isn't set and my login ID 
> is not the username of the database.  The PGUSER setting might differ 
> for each host, so specifying this in the software is not practical.
> 
> Bottom line:  What trick can I use to determine whether a box has a 
> living, breathing Pg database if I don't know the DB owner? 

Use a net mgmt tool (like opennms).
netcat, telnet to 5432, etc...

> 
> Mark
> 
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> TIP 2: Don't 'kill -9' the postmaster
> 

-- 
-Achilleus