From owner-freebsd-arch@FreeBSD.ORG Mon Apr 9 16:27:30 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 3B6BA16A401 for ; Mon, 9 Apr 2007 16:27:30 +0000 (UTC) (envelope-from brooks@lor.one-eyed-alien.net) Received: from lor.one-eyed-alien.net (grnl-static-02-0046.dsl.iowatelecom.net [69.66.56.110]) by mx1.freebsd.org (Postfix) with ESMTP id E67CC13C4C7 for ; Mon, 9 Apr 2007 16:27:29 +0000 (UTC) (envelope-from brooks@lor.one-eyed-alien.net) Received: from lor.one-eyed-alien.net (localhost [127.0.0.1]) by lor.one-eyed-alien.net (8.13.8/8.13.8) with ESMTP id l39GB6Xc036050; Mon, 9 Apr 2007 11:11:06 -0500 (CDT) (envelope-from brooks@lor.one-eyed-alien.net) Received: (from brooks@localhost) by lor.one-eyed-alien.net (8.13.8/8.13.8/Submit) id l39GB66N036049; Mon, 9 Apr 2007 11:11:06 -0500 (CDT) (envelope-from brooks) Date: Mon, 9 Apr 2007 11:11:06 -0500 From: Brooks Davis To: Pawel Jakub Dawidek Message-ID: <20070409161106.GA34667@lor.one-eyed-alien.net> References: <20070407120656.GD63916@garage.freebsd.pl> <20070409145620.GF76673@garage.freebsd.pl> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="PNTmBPCT7hxwcZjr" Content-Disposition: inline In-Reply-To: <20070409145620.GF76673@garage.freebsd.pl> User-Agent: Mutt/1.5.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (lor.one-eyed-alien.net [127.0.0.1]); Mon, 09 Apr 2007 11:11:06 -0500 (CDT) Cc: 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: Mon, 09 Apr 2007 16:27:30 -0000 --PNTmBPCT7hxwcZjr Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Apr 09, 2007 at 04:56:20PM +0200, Pawel Jakub Dawidek wrote: > On Sat, Apr 07, 2007 at 02:06:56PM +0200, Pawel Jakub Dawidek wrote: > > Hi. > >=20 > > After initial discussion on IRC, I'd like to propose an addition... > > I want to use it with ZFS, but I thought it may be useful in general, so > > here it goes: > >=20 > > I'd like to assign a unique ID to the system on first boot. > >=20 > > When system starts, /etc/rc.d/hostid script checks if /hostid file > > exists, if it doesn't, it creates it via 'uuidgen > /hostid'. > >=20 > > It will also set kern.hostuuid sysctl to this value and first four bytes > > of MD5(kern.hostuuid) will be stored in kern.hostid. It will allow to > > use gethostid(3). > >=20 > > If root file system is read-only, different uuid will be genrated on > > each boot. Not sure if anything better can be done here. > >=20 > > As I said, I think it may be genrally useful. Imagine using it with > > magic/variant symlinks, for example. >=20 > Here is the patch: >=20 > http://people.freebsd.org/~pjd/patches/hostid.patch >=20 > Any objections? Looks good to me. -- Brooks --PNTmBPCT7hxwcZjr Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFGGmWZXY6L6fI4GtQRAklYAJ0TExEaNJlOliTUZ+DJDh2H7li1lACeI/qN bijEqhYQS7PXANMmtUyoY28= =it7N -----END PGP SIGNATURE----- --PNTmBPCT7hxwcZjr--