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Re: PQping command line tool

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: Phil Sorber <phil(at)omniti(dot)com>
Cc: Bruce Momjian <bruce(at)momjian(dot)us>, PostgreSQL-development Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: PQping command line tool
Date: 2012-10-03 15:42:44
Message-ID: CAFj8pRC4YO+Z_PkXfGWTK_FdGSeCpB2rrxd5hY3ZjATMZRJ40A@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers
2012/10/3 Phil Sorber <phil(at)omniti(dot)com>:
> On Wed, Oct 3, 2012 at 11:35 AM, Bruce Momjian <bruce(at)momjian(dot)us> wrote:
>> On Tue, Oct  2, 2012 at 11:01:36PM -0400, Phil Sorber wrote:
>>> I was wondering recently if there was any command line tool that
>>> utilized PQping() or PQpingParams(). I searched the code and couldn't
>>> find anything and was wondering if there was any interest to have
>>> something like this included? I wrote something for my purposes of
>>> performing a health check that also supports nagios style status
>>> output. It's probably convenient for scripting purposes as well. It's
>>> not currently ready for submission to a commitfest, but if there was
>>> an interest I would clean it up so that it would be.
>>
>> I don't see any tool using PQping except pg_ctl.  Perhaps we should
>> modify "pg_ctl status" to use PQping.  Right now is only checks the
>> postmaster.pid file, and checks to see that the pid is a running
>> postmaster.  What it currently doesn't do is to check if the server is
>> accepting connections with PQping(), like we do for "pg_ctl -w start".
>>
>> Comments?
>
> I was thinking that maybe this should be a new feature in an existing
> tool, however I don't think pg_ctl would satisfy my use case as it's
> normally bundled with the server. This would need to be something that
> I could install just a client package. It's not a deal breaker, but it
> makes things more complex.
>
> How about adding it as an option to psql? That's not to say that I
> think we shouldn't also add it to 'pg_ctl status'.

+1

Pavel
>
>>
>> --
>>   Bruce Momjian  <bruce(at)momjian(dot)us>        http://momjian.us
>>   EnterpriseDB                             http://enterprisedb.com
>>
>>   + It's impossible for everything to be true. +
>
>
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