From: Tom Lane <tgl@sss.pgh.pa.us>
To: Marc G. Fournier <scrappy@hub.org>
Cc: pgsql-hackers@postgreSQL.org
Subject: Re: [ADMIN] postgresql in FreeBSD jails: proposal
Date: Thu, 17 Jan 2008 01:12:54 -0500
Message-ID: <4089.1200550374@sss.pgh.pa.us> (raw)
In-Reply-To: <fmmqfh$buq$3@news.hub.org>
References: <1200501702.478e33c61b74e@webmail.telus.net>
<fmmqfh$buq$3@news.hub.org>
"Marc G. Fournier" <scrappy@hub.org> writes:
> mischa_sandberg@telus.net (Mischa Sandberg) writes:
>> Unfortunately, with multiple jails running PG servers and (due to app
>> limitations) all servers having same PGPORT, you get the situation that
>> when jail#2 (,jail#3,...) server comes up, it:
>> - detects that there is a shm seg with ipc key 5432001
>> - checks whether the associated postmaster process exists (with kill -0)
>> - overwrites the segment created and being used by jail #1
> Easiest fix: change the UID of the user running the postmaster (ie. pgsql) so
> that each runs as a distinct UID (instead of distinct PGPORT) ... been doing
> this since moving to FreeBSD 6.x ... no patches required ...
Sure, but in the spirit of "belt and suspenders too", I'd think that
doing that *and* something like Mischa's proposal wouldn't be bad.
(BTW, as far as I saw the original post only went to -hackers
... there's something messed up about your reply.)
regards, tom lane
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To: pgsql-admin@postgresql.org
Cc: tgl@sss.pgh.pa.us, scrappy@hub.org, pgsql-hackers@postgreSQL.org
Subject: Re: [ADMIN] postgresql in FreeBSD jails: proposal
In-Reply-To: <4089.1200550374@sss.pgh.pa.us>
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