Date: Fri, 09 Jul 2010 09:27:21 +0300 From: Daniel Braniss <danny@cs.huji.ac.il> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable@freebsd.org Subject: Re: net-booting the install disks (Re: 8.x grudges) Message-ID: <E1OX73R-000HfX-Vs@kabab.cs.huji.ac.il> In-Reply-To: <20100708164022.GA46433@icarus.home.lan> References: <4C34C5DE.7040007@aldan.algebra.com> <AANLkTil1jtcgOV5c5rLQabS2kJ2DA09haRY3VB0bgA8x@mail.gmail.com> <4C34CA31.7010804@aldan.algebra.com> <AANLkTimQFCxQpCx32dxvYscGspUkqyRbyPE_ru8RS5My@mail.gmail.com> <4C34E39A.7090905@aldan.algebra.com> <20100708135353.GA43460@icarus.home.lan> <4C35E9D4.8080007@aldan.algebra.com> <20100708164022.GA46433@icarus.home.lan>
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> On Thu, Jul 08, 2010 at 11:08:04AM -0400, Mikhail T. wrote:
> > 08.07.2010 09:53, Jeremy Chadwick =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=
=B0=D0=3D=B2(=D0=BB=D0=B0):
> > >Then don't modify loader.conf. Instead, once the =22Welcome to Free=
BSD=21=3D=22
> > >portion of loader appears, press =226=22 to shell to the loader prom=
pt
> > >and type:
> > >
> > >set vfs.root.mountfrom=3D=22ufs:/dev/md0=22
> > >boot
> > Yes, that works... It just should not be necessary.
>=20
> Okay, so let me get this straight. First the complaint was that you ha=
d
> to modify loader.conf, which involved extracting the CD image, editing
> the file, yadda yadda. Now that you've been shown you don't have to
> edit loader.conf, the complaint is =22it shouldn't be necessary=22. :-=
)
>=20
> There's actually quite a bit about FreeBSD that =22shouldn't be> necess=
ary=22 (from an administrator's point of view), but that's a
> completely separate issue when compared to your =22when I do thing X in=
> the kernel config, it breaks=22. Which of those two approaches do you
> want to focus on?
> > > Red Hat's =22kickstart=22 does not require one to extract CD-images=
to
> > fiddle with a couple of lines, and FreeBSD comes tantalizingly close
> > to offer the same functionality. Just not quite :-(
> > I've PXE booted Ubuntu and Debian. It was easy to accomplish (read:
> easier than FreeBSD) because they offer pxelinux vs. FreeBSD's pxeboot.=
> > pxelinux=5B1=5D offers the ability to read a configuration file via T=
FTP,
> which configures pxelinux itself. The configuration capabilities are
> very impressive=5B2=5D. FreeBSD folks interested in PXE should really =
take
> a look at this thing. I believe the configuration file is read and
> applied immediately, so things like serial port speed changes happen
> before pxelinux outputs anything (e.g. no need to rebuild pxelinux just=
> to get a faster rate).
>=20
> That said, given that FreeBSD's pxeboot requires a bunch of extra work
> (rebuilding for faster serial speed, and a bunch of other stuff -- it's=
> in my doc), I'm a surprised you're not complaining about that. :-)
>=20
> The bottom line: the PXE booting framework in FreeBSD could be improved=
.
It has been improved, though not the documentation :-(
you can configure most of the stuff via DHCP, take a look
at src/lib/libstand/bootp.c
example lines from dhcpd.conf:
option FBSD.ind0 =22hint.uart.0.flags=3D0x10=22
option FBSD.ind1 =22kern.ipc.semmni=3D256=22
option FBSD.ind2 =22kern.ipc.semmns=3D2048=22
and with this code in rc.initdiskless:
confpath=3D=60kenv conf-path=60
if =5B -n =22=24confpath=22 =5D ; then
if =5B =22=60expr =24confpath : '=5C(.*=5C):'=60=22 =5D ; then
echo Mounting =24confpath on /conf
mount_nfs =24confpath /conf
chkerr =24? =22mount_nfs =24confpath /conf=22
to_umount=3D=22=24=7Bto_umount=7D =24confpath=22
fi
fi
eval =60kenv =7C sed -n 's/=5Erc=5C.//p'=60
rm -f /etc/rc.conf /etc/rc.conf.local
for fc in =24conf0 =24conf1 =24conf2 =24conf3 =24conf4 =24conf5 =24conf6 =
=24conf7 =24conf8=20
=24conf9 rc.conf.=24hostname
do
ho=3D=60expr =24fc : '=5C(.*=5C):'=60
fl=3D=60expr =24fc : '.*/=5C(.*=5C)'=60
if =5B =22=24=7Bho=7D=22 =21=3D =22=22 =5D; then
mp=3D=60expr =24fc : '=5C(.*=5C)/.*'=60
mount_nfs =24mp /mnt > /dev/null 2>&1
if =5B -f /mnt/=24fl =5D; then
echo =22=23 from =24fc /mnt/=24fl=22 >> /etc/rc.conf
cat /mnt/=24fl >> /etc/rc.conf
fi
umount /mnt > /dev/null 2>&1
elif =5B -e /conf/=24fc =5D ; then
echo =22=23 from /conf/=24fc=22 >> /etc/rc.conf
cat /conf/=24fc >> /etc/rc.conf
fi
done
and these lines in dhcpd.conf
option FBSD.conf-path=3D=22fr-01:/vol/system/share/conf=22
option FBSD.rc-conf3 =22rc.ws8=22
...
will generate a 'personalized' rc.conf
danny
PS: this is not the first time I have posted this.
=5B...=5D
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