Date: Sat, 7 Apr 2007 19:54:39 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Pawel Worach <pawel.worach@gmail.com> Cc: freebsd-arch@FreeBSD.org Subject: Re: Host ID. Message-ID: <20070407175439.GL63916@garage.freebsd.pl> In-Reply-To: <4617CB2D.8000508@gmail.com> References: <20070407120656.GD63916@garage.freebsd.pl> <4617CB2D.8000508@gmail.com>
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--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--
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