Date: Mon, 12 Dec 2005 19:15:49 -0500 (EST) From: Daniel Feenberg <feenberg@nber.org> To: questions@freebsd.org Subject: diskless booting and t134 Message-ID: <Pine.GSO.4.10.10512121912390.22189-100000@nber1.nber.org>
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I am trying to do diskless booting, and find it requires much esoteric
knowledge. Right now I am trying to make the /conf/${class}/ function
provided in FreeBSD 6.0 work. It is briefly documented in the
"diskless" manpage, but with no examples. I have had success with
/conf/${ip}/ but not with ${class}.
I have
option t134-cookie code 134=text
at the beginning of my dhcpd.conf file, and
option t134-cookie "client"
with the other parameters for the diskless client. dhcp accepts this
and goes into background. The dhcpd server is on a FreeBSD 5.2.1
system, but since any slight variation on these commands is diagnosed,
I have the impression that the dhcp server is ok with these settings.
I have added at /disklessroot/conf/client/etc/rc.local an
identifiable file, yet when I boot the diskless client and look at
/etc/rc.local on it, it is clearly not the file from conf/client/etc
but the one in conf/default/etc/
I have tried using /disklessroot/conf/123.123.123.123/etc/rc.local
(where actual ip address is obfusticated) and that file is correctly
picked up. So the /conf system is functioning.
I can't tell what might be wrong, but if I look in /etc/rc.initdiskless
it does echo the value of ${class}, which in my case is blank rather
than the expected "client". If I run "kenv" or "sysctl -a" and search
the output for this variable, I don't see anything with "134",
"cookie", or "client". My thought is that maybe the "t134" feature
isn't supported in the 6.0 release kernel. I couldn't find out anything
about it, other than seeing it referred to in a couple of messages as
"kern.bootp_cookie". Anyone familiar with this function?
I am using an unmodified 6.0 #0 kernel, with the default options. It
does serve to generate a system that boots and functions (except
where programs write to read-only filesystems.
Thanks
Daniel Feenberg
feenberg isat nber dotte org
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