Date: Mon, 9 Apr 2007 11:11:06 -0500 From: Brooks Davis <brooks@freebsd.org> To: Pawel Jakub Dawidek <pjd@freebsd.org> Cc: freebsd-arch@freebsd.org Subject: Re: Host ID. Message-ID: <20070409161106.GA34667@lor.one-eyed-alien.net> In-Reply-To: <20070409145620.GF76673@garage.freebsd.pl> References: <20070407120656.GD63916@garage.freebsd.pl> <20070409145620.GF76673@garage.freebsd.pl>
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[-- Attachment #1 --] 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. > > > > 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. > > Here is the patch: > > http://people.freebsd.org/~pjd/patches/hostid.patch > > Any objections? Looks good to me. -- Brooks [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFGGmWZXY6L6fI4GtQRAklYAJ0TExEaNJlOliTUZ+DJDh2H7li1lACeI/qN bijEqhYQS7PXANMmtUyoY28= =it7N -----END PGP SIGNATURE-----
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