From owner-freebsd-questions@FreeBSD.ORG Wed Mar 21 16:51:05 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 052CD16A401 for ; Wed, 21 Mar 2007 16:51:05 +0000 (UTC) (envelope-from nalists@scls.lib.wi.us) Received: from mail.scls.lib.wi.us (mail.scls.lib.wi.us [198.150.40.25]) by mx1.freebsd.org (Postfix) with ESMTP id C6D4E13C4B8 for ; Wed, 21 Mar 2007 16:51:04 +0000 (UTC) (envelope-from nalists@scls.lib.wi.us) Received: from [10.150.107.67] ([10.150.107.67]) by mail.scls.lib.wi.us (8.13.8/8.13.1) with ESMTP id l2LGuorv023924; Wed, 21 Mar 2007 11:56:50 -0500 (CDT) (envelope-from nalists@scls.lib.wi.us) Message-ID: <4601626B.1070702@scls.lib.wi.us> Date: Wed, 21 Mar 2007 11:50:51 -0500 From: Greg Barniskis User-Agent: Thunderbird 1.5.0.9 (Windows/20061207) MIME-Version: 1.0 To: Bill Moran References: <42991.167.246.36.14.1174490156.squirrel@webmail.dfwlp.org> <4601501C.3060605@gmail.com> <10072.167.246.36.14.1174492472.squirrel@webmail.dfwlp.org> <20070321121031.d95cadf6.wmoran@potentialtech.com> <46015BFD.4060806@scls.lib.wi.us> <20070321122852.8eaa2663.wmoran@potentialtech.com> In-Reply-To: <20070321122852.8eaa2663.wmoran@potentialtech.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Jonathan Horne , freebsd-questions@freebsd.org Subject: Re: started playing with jails X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Mar 2007 16:51:05 -0000 Bill Moran wrote: > In response to Greg Barniskis : > >> Bill Moran wrote: >> >>> I've had trouble getting programs that use shared memory (such as Postgres) >>> to run inside a jail, but it's been a while since I've tried. >> Postgres needs this in the host rc.conf: >> >> jail_sysvipc_allow="YES" > > My experiments with Postgres in jail predate the existence of that setting. > When I was working with it, you had to frob a sysctl via /etc/sysctl.conf > > But even then, I couldn't seem to get it to work -- the Postgres in the > jail would corrupt the shared memory of the postgres outside the jail. > It was ugly. Imagine big, wet tears rolling down my cheeks. > > I haven't had the need to try it in a while, so it might work OK now, I > just don't know. > Ah, now that you mention it I do recall discussions of multiple instances peeing in each others pools so to speak. I also thought there was discussion of how to fix it, but have no idea where that went if anywhere... A single instance inside a jail does work quite happily if the knob above is set. -- Greg Barniskis, Computer Systems Integrator South Central Library System (SCLS) Library Interchange Network (LINK) , (608) 266-6348