On Tuesday 07 December 2004 10:13, Jason Clark wrote:
> Hey gang, just thought I would post this quick and dirty on how to build
> gentoo from stage 1 inside of a 2.6.9-bb4 UML. BTW, the bb4 patch seems
> to be really solid. I haven't run into a single issue with it thus far.
Ok, it means that the uml-extramask fix was the only needed one... I'm
*really* happy with that. Also, remember to promptly report everything as
2.6.10 will contain 2.6.9-bb4 fixes.
Also, I'm happy to see that since Roger Sala had experienced various issues
when building a Gentoo root_fs. They were very likely related to the previous
stability issues of -bb4!
Finally, I think that if I get the time, I will start building my own Gentoo
root fs, and following your instructions.
> Building gentoo from stage 1 inside a UML
> First create root_fs (creates a 2gig sparse file)
> dd of=root_fs bs=1024 count=2000000 seek=0
> mkfs.ext3 root_fs
>
> mount root_fs
> mkdir uml
> mount root_fs uml -o loop
>
> unzip stage1 into root_fs
> cd uml
> tar xvjf ../stage1-x86-2004.3.tar.bz2
>
> copy mount, route and ifconfig or ip into root_fs. Note that if you are
> using the iproute2 package you only need to copy ip and mount over.
> cp `which ifconfig` usr/bin
> cp `which ip` usr/bin
> cp `which mount` usr/bin
> cp `which route` usr/bin
They are *not* inside the root_fs? Oh, yes... normal Gentoo assumes you
configure the network outside the chroot, so they're not needed!
> unmount uml
> cd ..
> umount uml
> boot uml, this assumes your host IP is 192.168.1.1. You can build the
> tuntap stuff by hand if you want, but for an install, the net helper is
> fine.
> linux ubd0=root_fs mem=128M eth0=tuntap,,,192.168.1.1 rw
> mount filesystems inside uml
> mount proc /proc -t proc
> mount none /dev/pts -t devpts
> bring up eth0 using ip
> ip addr add 192.168.1.111/24 brd + dev eth0
> ip link set eth0 up
> ip route add default via 192.168.1.1
> OR
> bring up eth0 using ifconfig
> ifconfig eth0 192.168.1.111 netmask 255.255.255.0 broadcast
> 192.168.1.255 up route add default gateway 192.168.1.1 dev eth0
> edit make.conf to look like the following
> CFLAGS="-O2 -mcpu=i686 -fomit-frame-pointer"
> CHOST="i386-pc-linux-gnu"
> CXXFLAGS="${CFLAGS}"
> FEATURES="-sandbox"
> The -sandbox is very important, if you don't do this you will get a bunch
> of errors like this one
> ACCESS DENIED open_wr: /dev/console
> The short answer is that we dont really need gentoo to sandbox itself
> since we aren't in a chroot like stage1 expects but are instead in a full
> on uml. At this point, you can follow the stage1 build directions
> without modification. I'll make a purdy version soon. Enjoy!
I'd like to add a note for who wants to follow this HOWTO: never enable nptl
USE flags for glibc in the guest, since UML is NPTL-incompatible... and there
is no possibility to get back by renaming /lib/tls!
Bye
> Jason
> We the willing, led by the unknowning, are doing the impossible, for the
> ungrateful. We have done so much, for so long, with so little. We are now
> qualified to do anything with nothing.
--
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729
http://www.user-mode-linux.org/~blaisorblade
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