#!/bin/sh
#
# (C) 2001 Luigi Rizzo, Gabriele Cecchetti
# <Standard BSD copyright>
# Revised 2001.04.16
#
#
# clone root filesystem for diskless root stuff
#
# usage
# clone_root all to do a full copy (e.g. bin, sbin...)
# clone_root update to recreate /var (including devices)
# clone_root to copy /conf and password-related files
#
# This script assumes that you use a shared readonly root and /usr
# partition. The script creates a partial clone of the root partition,
# and puts it into ${DEST} (defaults to /diskless_root ) on the server,
# where it is read.
#
# To run a diskless install you need to do the following:
#
# create /conf/default/etc/fstab
# this will replace the standard /etc/fstab and should contain
# as a minimum the following lines
# ${SERVER}:${DEST} / nfs ro 0 0
# ${SERVER}:/usr /usr nfs ro 0 0
# proc /proc procfs rw 0 0
#
# create /conf/default/etc/rc.conf
# this will replace the standard rc.conf and should contain
# the startup options for the diskless client. Most likely
# you will not need to set hostname and ifconfig_* because these
# will be already set by the startup code. You will also
# probably need to set local_startup="" so that the server's
# local startup files will not be used.
#
# create a kernel config file in /sys/i386/conf/DISKLESS with
# options MD_ROOT
# options BOOTP
# options BOOTP_NFSROOT
# options BOOTP_COMPAT
# and do a full build of the kernel.
# If you use the firewall, remember to default to open or your kernel
# will not be able to send/receive the bootp packets.
#
# On the server:
# enable NFS server and set /etc/exports as
# ${DEST} -maproot=0 -alldirs <list of diskless clients>
# /usr -alldirs
#
# enable bootpd by uncommenting the bootps line in /etc/inetd.conf
# and putting at least the following entries in /etc/bootptab:
# .default:\
# hn:ht=1:vm=rfc1048:\
# :sm=255.255.255.0:\
# :sa=${SERVER}:\
# :gw=${GATEWAY}:\
# :rp="${SERVER}:${DEST}":
#
# client1:ha=0123456789ab:tc=.default
#
# and make sure that client1 is listed in /etc/hosts
# VARIABLES:
# some manual init is needed here.
# DEST the diskless_root dir (goes into /etc/bootptab and /etc/exports
# on the server)
DEST=/diskless_root
# you should not touch these vars:
# SYSDIRS system directories and mountpoints
# DIRS mountpoints (empty dirs)
# PWFILES files related to passwords
# TOCOPY files and dirs to copy from root partition
SYSDIRS="dev proc root usr var"
DIRS="cdrom home mnt"
PWFILES="master.passwd passwd spwd.db pwd.db"
TOCOPY="bin boot compat etc modules sbin stand sys"
init_diskless_root() {
echo "Cleaning old diskless root ($DEST)"
cd /
rm -rf ${DEST} && echo "Old diskless root removed."
echo "Creating $DEST..."
mkdir -p $DEST && echo "New diskless root created."
echo "+++ Now copy original tree from / ..."
ex=""
(cd / ; tar -clf - ${TOCOPY} ) | (cd $DEST; tar xvf - )
#(cd / ; find -x dev | cpio -o -H newc ) | \
# (cd $DEST; cpio -i -H newc -d )
echo "+++ Fixing permissions on some objects"
chmod 555 $DEST/sbin/init
}
update_conf_and_pw() {
echo "+++ Copying files in /conf and password files"
(cd ${DEST} ; rm -rf conf )
(cd / ; tar clf - conf ) | (cd ${DEST}; tar xvf - )
mkdir -p ${DEST}/conf/etc # used to mount things
(cd /etc ; tar cvf - ${PWFILES} ) | (cd ${DEST}/etc ; tar xf - )
}
update() {
echo "+++ update: create mountpoints and device entries, kernel"
for i in ${SYSDIRS} ${DIRS}
do
rm -r -f ${DEST}/$i
mkdir -p ${DEST}/$i && chown root:wheel ${DEST}/$i && echo -n "$i "
done
echo "."
ln -s /var/tmp ${DEST}/tmp
echo "+++ Copying kernel from /sys/compile/DISKLESS"
cp /sys/compile/DISKLESS/kernel $DEST/kernel
echo "."
}
# Main entry point
case $1 in
all) # clean and reinstall the whole diskless_root
init_diskless_root
update
update_conf_and_pw
;;
update) # clean and rebuild mountpoints and device entries
update
update_conf_and_pw
;;
*) # copy /conf and password files
update_conf_and_pw
;;
esac
exit 0
### end of file ###
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