Date: Sat, 7 Apr 2007 14:06:56 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: freebsd-arch@FreeBSD.org Subject: Host ID. Message-ID: <20070407120656.GD63916@garage.freebsd.pl>
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--hoZxPH4CaxYzWscb Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --hoZxPH4CaxYzWscb Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFGF4lgForvXbEpPzQRAuMvAKCur1GyHoluK9RIK1mabZUr8Y+ilgCg8g7N 7N15z8idR6SdKACQoVB0L7I= =9u5u -----END PGP SIGNATURE----- --hoZxPH4CaxYzWscb--
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