From owner-freebsd-arch@FreeBSD.ORG Sat Apr 7 17:55:02 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 5410316A401 for ; Sat, 7 Apr 2007 17:55:02 +0000 (UTC) (envelope-from pjd@garage.freebsd.pl) Received: from mail.garage.freebsd.pl (arm132.internetdsl.tpnet.pl [83.17.198.132]) by mx1.freebsd.org (Postfix) with ESMTP id E563513C44C for ; Sat, 7 Apr 2007 17:55:00 +0000 (UTC) (envelope-from pjd@garage.freebsd.pl) Received: by mail.garage.freebsd.pl (Postfix, from userid 65534) id 23B8E487FB; Sat, 7 Apr 2007 19:54:59 +0200 (CEST) Received: from localhost (cvl74.internetdsl.tpnet.pl [83.19.93.74]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.garage.freebsd.pl (Postfix) with ESMTP id D0D6A487FA; Sat, 7 Apr 2007 19:54:48 +0200 (CEST) Date: Sat, 7 Apr 2007 19:54:39 +0200 From: Pawel Jakub Dawidek To: Pawel Worach Message-ID: <20070407175439.GL63916@garage.freebsd.pl> References: <20070407120656.GD63916@garage.freebsd.pl> <4617CB2D.8000508@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Xb8pJpF45Qg/t7GZ" Content-Disposition: inline In-Reply-To: <4617CB2D.8000508@gmail.com> X-PGP-Key-URL: http://people.freebsd.org/~pjd/pjd.asc X-OS: FreeBSD 7.0-CURRENT i386 User-Agent: mutt-ng/devel-r804 (FreeBSD) X-Spam-Checker-Version: SpamAssassin 3.0.4 (2005-06-05) on mail.garage.freebsd.pl X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=BAYES_00,RCVD_IN_NJABL_DUL autolearn=no version=3.0.4 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: Sat, 07 Apr 2007 17:55:02 -0000 --Xb8pJpF45Qg/t7GZ Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Apr 07, 2007 at 06:47:41PM +0200, Pawel Worach wrote: > Pawel Jakub Dawidek wrote: > >Hi. > >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: > >I'd like to assign a unique ID to the system on first boot. > >When system starts, /etc/rc.d/hostid script checks if /hostid file > >exists, if it doesn't, it creates it via 'uuidgen > /hostid'. > >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). > >If root file system is read-only, different uuid will be genrated on > >each boot. Not sure if anything better can be done here. > >As I said, I think it may be genrally useful. Imagine using it with > >magic/variant symlinks, for example. > >Comments? >=20 > What about ... >=20 > # kenv smbios.system.uuid > 63F8BC81-475C-11CB-A074-CA3B9005F8F6 >=20 > Not all systems have SMBIOSen but maybe it can be used instead of /{,etc}= /hostid if available ? We thought about this, but as you noted it's not always available. I want this to behave the same on each system. --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --Xb8pJpF45Qg/t7GZ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFGF9rfForvXbEpPzQRAi4WAJ91pczMTbCvYZZoc9KOySpj7Y+pOwCZAQJp cqECwpSDjFkxG6oK3M2Kzwc= =Hsxe -----END PGP SIGNATURE----- --Xb8pJpF45Qg/t7GZ--