Subject: Re: Statistics collector port / unix dom. socket?
From: Peter Sabaini <peter.sabaini@ait.ac.at>
To: Scott Marlowe <scott.marlowe@gmail.com>
CC: <pgsql-admin@postgresql.org>
In-Reply-To: <w2ydcc563d11005041304ufc8ee23dy2e0873df298d2b5f@mail.gmail.com>
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	<1273002081.2590.7.camel@w-ehs-psa.telbiomed.at>
	<w2ydcc563d11005041304ufc8ee23dy2e0873df298d2b5f@mail.gmail.com>
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Date: Wed, 5 May 2010 09:33:54 +0200
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On Tue, 2010-05-04 at 14:04 -0600, Scott Marlowe wrote:
> On Tue, May 4, 2010 at 1:41 PM, Peter Sabaini <peter.sabaini@ait.ac.at> w=
rote:
> > On Tue, 2010-05-04 at 11:39 -0400, Tom Lane wrote:
> >> Peter Sabaini <peter.sabaini@ait.ac.at> writes:
> >> > it seems Postgres tries to send a UDP packet to a random high port t=
o
> >> > communicate with the statistics collector daemon. We have rather str=
ict
> >> > packet filter rules in place, and I'd like to make the system use a
> >> > fixed port for this, or even better a Unix domain socket. Is this
> >> > possible (setting a compile time or run time parameter)?
> >>
> >> No, the stats collector just uses whatever port bind() chooses for it.
> >
> > A pity.
> >
> >> I'd suggest backing off your ideas about how much filtering is
> >> appropriate for local connections.
> >
> > Since we're running multiple database instances with different projects
> > on one machine I'd like to isolate them as best I can.
>=20
> Maybe running them in individual VMs would do that.

We run them in containers (kind of like a chroot++). Since we're running
a lot of small projects on that machine, full virtualization (VMware,
Xen etc) would be unfeasible.


--=20
PETER SABAINI
Safety & Security Department
Information Management & eHealth

AIT Austrian Institute of Technology GmbH
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