Date: Wed, 21 Mar 2007 11:50:51 -0500 From: Greg Barniskis <nalists@scls.lib.wi.us> To: Bill Moran <wmoran@potentialtech.com> Cc: Jonathan Horne <freebsd@dfwlp.com>, freebsd-questions@freebsd.org Subject: Re: started playing with jails Message-ID: <4601626B.1070702@scls.lib.wi.us> In-Reply-To: <20070321122852.8eaa2663.wmoran@potentialtech.com> 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>
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Bill Moran wrote: > In response to Greg Barniskis <nalists@scls.lib.wi.us>: > >> 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) <gregb at scls.lib.wi.us>, (608) 266-6348
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