From owner-freebsd-arch@FreeBSD.ORG Sun Apr 8 19:46:18 2007 Return-Path: X-Original-To: freebsd-arch@freebsd.org Delivered-To: freebsd-arch@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 6AC3316A402; Sun, 8 Apr 2007 19:46:18 +0000 (UTC) (envelope-from ceri@submonkey.net) Received: from shrike.submonkey.net (cpc3-cdif2-0-0-cust64.cdif.cable.ntl.com [81.106.128.65]) by mx1.freebsd.org (Postfix) with ESMTP id 1171D13C483; Sun, 8 Apr 2007 19:46:18 +0000 (UTC) (envelope-from ceri@submonkey.net) Received: from ceri by shrike.submonkey.net with local (Exim 4.66 (FreeBSD)) (envelope-from ) id 1HadL6-000Gpz-LO; Sun, 08 Apr 2007 20:46:16 +0100 Date: Sun, 8 Apr 2007 20:46:16 +0100 From: Ceri Davies To: Robert Watson Message-ID: <20070408194616.GN90410@submonkey.net> References: <20070407120656.GD63916@garage.freebsd.pl> <20070407145154.GG63916@garage.freebsd.pl> <86d52fut50.fsf@dwp.des.no> <20070408105140.L77212@fledge.watson.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="R92lf0Oi2sxyK3LA" Content-Disposition: inline In-Reply-To: <20070408105140.L77212@fledge.watson.org> X-PGP: finger ceri@FreeBSD.org User-Agent: Mutt/1.5.14 (2007-02-12) Sender: Ceri Davies Cc: Dag-Erling Sm?rgrav , Andrew Pantyukhin , Pawel Jakub Dawidek , freebsd-arch@freebsd.org Subject: Re: Host ID. X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 08 Apr 2007 19:46:18 -0000 --R92lf0Oi2sxyK3LA Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Apr 08, 2007 at 10:54:34AM +0100, Robert Watson wrote: >=20 > On Sun, 8 Apr 2007, Dag-Erling Sm?rgrav wrote: >=20 > >Pawel Jakub Dawidek writes: > >>If we move disks with root file system, it's this more or less the same= =20 > >>host, isn't it? > > > >No. I recently installed three servers by replicating the disk from a= =20 > >fourth and changing the host name and IP address in rc.conf. >=20 > Yes, one of the nice properties of FreeBSD -- as opposed to, say, Windows= ,=20 > is that it's trivial to install a hundred boxes by dropping the same imag= e=20 > onto all of them and configuring host-specific parameters using DHCP. Bu= t=20 > there is a tricky tension here: the notion of a persisting host ID is ver= y=20 > useful, in the a similar way to the way in which a persisting SSH host ke= y=20 > is useful. If we're going to adopt a host ID model, we may want to make= =20 > generation and configuration of the host ID conditional on an explicit=20 > variable in rc.conf (i.e., hostid_enable=3D"YES" which causes it to be=20 > generated the first time and loaded future times, similar to SSH keys), a= nd=20 > make it very easy to force a regen. That way, you can image the boxes wi= th=20 > the rc.conf setting set, but they don't generate host IDs until they boot= =20 > the first time. Or perhaps we need an equivalent to sys-unconfig[1] ? [1] http://docs.sun.com/app/docs/doc/816-5166/6mbb1kqj3?q=3Dsysconfig&a=3Dv= iew Ceri --=20 That must be wonderful! I don't understand it at all. -- Moliere --R92lf0Oi2sxyK3LA Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFGGUaIocfcwTS3JF8RAny1AKDDzkILwo2az4CaZOV576aoojUmyACgnQ/E 2M3m12lEpwKCKhPXKURpJg0= =gBkf -----END PGP SIGNATURE----- --R92lf0Oi2sxyK3LA--