Date: Mon, 9 Apr 2007 16:56:20 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: freebsd-arch@FreeBSD.org Subject: Re: Host ID. Message-ID: <20070409145620.GF76673@garage.freebsd.pl> In-Reply-To: <20070407120656.GD63916@garage.freebsd.pl> References: <20070407120656.GD63916@garage.freebsd.pl>
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[-- Attachment #1 --] 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? -- Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFGGlQUForvXbEpPzQRAsmHAJ4iyFpbBvAApzFIy9iUdHHwx/o4NACg8gVA NpAO1Uqhczu1+VXv+4E06lk= =s3BH -----END PGP SIGNATURE-----
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