Date: Sat, 7 Apr 2007 14:25:09 +0100 From: Ceri Davies <ceri@submonkey.net> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: freebsd-arch@FreeBSD.org Subject: Re: Host ID. Message-ID: <20070407132509.GJ90410@submonkey.net> In-Reply-To: <20070407120656.GD63916@garage.freebsd.pl> References: <20070407120656.GD63916@garage.freebsd.pl>
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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.
Can we put it in /etc ? That would allow setups like nanobsd to benefit
too.
Ceri
--
That must be wonderful! I don't understand it at all.
-- Moliere
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