#!/bin/sh # # (C) 2001 Luigi Rizzo, Gabriele Cecchetti # # Revised 2001.04.16 # # $FreeBSD$ # # 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 # ${DEST} -maproot=0 -alldirs # /usr -alldirs # # enable bootpd by uncommenting the bootps line in /etc/inetd.conf # and putting at least the following entries in /etc/bootptab: # .default:\ # hn:ht=1:vm=rfc1048:\ # :sm=255.255.255.0:\ # :sa=${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 ###