file used to initialize statelite images
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@4789 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
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vallard
263
xCAT-server/share/xcat/netboot/add-on/statelite/rc.statelite
Executable file
263
xCAT-server/share/xcat/netboot/add-on/statelite/rc.statelite
Executable file
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#!/bin/sh
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# rc.statelite will grab all the mount points we need to check
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# for keeping an image together. This will have to do until unionfs
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# is ready.
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# don't do chkconfig: 345 00 99
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# this file runs in a chroot environment.
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# description: statelite initialization script
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# get all the database files.
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#set -x
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SL=".statelite"
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ME=`hostname`
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MNTDIR="/sysroot"
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SYNCTREE="${MNTDIR}/$SL/litetree" # the list of directories to sync from
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SYNCLIST="${MNTDIR}/$SL/litefile" # the list of files to sync
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TREEMOUNT="${MNTDIR}/$SL/mnt" # where I mount all the trees.
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PERSISTENT="${MNTDIR}/$SL/persistent/$ME"
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TMPFS="${MNTDIR}/$SL/tmpfs"
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DEFAULT="${MNTDIR}/.default"
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LOG="${MNTDIR}/${SL}/statelite.log"
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if [ ! -d $MNTDIR ]
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then
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echo "statelite is only to be run in initrdfs"
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exit 1
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fi
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GetSyncInfo () {
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# who is our xCAT server? He's most likely our dhcp identifier.
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if [ ! -x ${MNTDIR}/usr/bin/openssl ]
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then
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echo "Image does not include openssl!"
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exit 1
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fi
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# wish we had bash!
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#for x in `cat /proc/cmdline`; do
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# [[ "$x" = "XCAT=*" ]] || continue
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# XCATSERVER="${x#XCAT=}"
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#done
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for i in `cat /proc/cmdline`; do
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KEY=`echo $i | awk -F= '{print $1}'`
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if [ "$KEY" == "XCAT" ]; then
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XCATSERVER=`echo $i | awk -F= '{print $2}'`
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break
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fi
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done
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if [ -z $XCATSERVER ]; then
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hn=`hostname`
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echo "Cannot find the xCAT server for node $hn"
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exit 1
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fi
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# request the list of files from xCAT:
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xCATCmd $XCATSERVER litefile \
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| sed -e 's/<[^>]*>//g' \
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| egrep -v '^ *$' \
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| sed -e 's/^ *//' \
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| awk -F: '{print $2}' \
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| sed -e 's/^ *//' \
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> $SYNCLIST
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# files will now be inside /.snapshot/tmpfs/synclist in the form:
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# options path
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xCATCmd $XCATSERVER litetree \
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| sed -e 's/<[^>]*>//g' \
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| egrep -v '^ *$' \
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| sed -e 's/^ *//' \
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| awk '{print $2}' \
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> $SYNCTREE
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}
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xCATCmd () {
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# $1 is the xCAT server
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# $2 is the command
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echo "<xcatrequest>\n<command>${2}</command>\n</xcatrequest>" | LD_LIBRARY_PATH=/sysroot/lib64:/sysroot/usr/lib64 /sysroot/usr/bin/openssl s_client -quiet -connect ${1} -rand /bin/nice 2>/dev/null
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}
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MountTrees () {
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mkdir -p $TREEMOUNT
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if [ -z $SYNCTREE ]
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then
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echo "Can't read $SYNCTREE. Something is wrong with this image..." >/dev/console
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exit 1
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fi
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P=1
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for i in `cat $SYNCTREE | grep -v '^#'`;
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do
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mkdir $TREEMOUNT/$P
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MAX=10
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TRIES=1
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while ! mount $i $TREEMOUNT/$P -r -n -o nolock
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do
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if [ "$TRIES" = "$MAX" ]
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then
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echo "Can't mount $i. I give up.. ">/dev/console
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break
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#exit 1
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fi
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TRIES=`expr $TRIES + 1`
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S=`expr $RANDOM % 20`
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echo "Can't mount $i... Sleeping $S seconds then trying again" >/dev/console
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sleep $S
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done
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P=`expr $P + 1`
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done
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}
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ResolveLinks () {
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# go through each file and do the right thing to it.
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cat $SYNCLIST | grep -v "^#" | \
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while read type path
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do
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FindFile ${path} ${type}
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done
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}
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ProcessType () {
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#MOUNT=$1 # mount point where this is.
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#PATH=$2 # file
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#TYPE=$3 # type of file
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# every type has to have a base dir in tmpfs
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if [ ! -d ${TMPFS}`dirname ${2}` ]
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then
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mkdir -p ${TMPFS}`dirname ${2}`
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echo "mkdir -p ${TMPFS}`dirname ${2}`" >>$LOG
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fi
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case "${3}" in
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tmpfs,rw)
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cp -a ${1} ${TMPFS}${2}
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echo "cp -a ${1} ${TMPFS}${2}" >>$LOG
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# the link will already be in place on the image, so nothing else to do!
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#mount -n --bind ${TMPFS}${2} ${1}
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;;
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con)
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# cons go in tmpfs
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cat ${1} >>${TMPFS}${2}
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echo "cat ${1} >>${TMPFS}${2}" >>$LOG
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;;
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persistent*)
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# everything from root image points to tmpfs
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# so have tmpfs point to persistent
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# make tree in persistent and tmpfs
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if [ ! -d ${PERSISTENT}`dirname ${2}` ]
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then
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mkdir -p ${PERSISTENT}`dirname ${2}`
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echo "mkdir -p ${PERSISTENT}`dirname ${2}`" >>$LOG
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fi
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# if the file doesn't exist, then copy it over to persistent
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if [ ! -e ${PERSISTENT}${2} ]
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then
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#ln -s ${1} ${PERSISTENT}/${2}
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# if its not there, then take it from something else
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echo "cp -a ${1} ${PERSISTENT}${2}" >>$LOG
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cp -a ${1} ${PERSISTENT}${2} 2>&1 >>$LOG
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#mount -n --bind ${TMPFS}${2} ${1}
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fi
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# finally make the tmpfs link point to the persistent file
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# you have to get rid of the /sysroot in the beginning
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# so that when the chroot happens the link is valid.
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LINK=`echo ${PERSISTENT}${2} | sed -e 's/^\/sysroot//'`
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echo "ln -sf ${LINK} ${TMPFS}${2}" >>$LOG
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ln -sf ${LINK} ${TMPFS}${2} >>$LOG 2>&1
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;;
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ro)
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# need to make sure directory exists:
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if [ ! -d ${TMPFS}`dirname ${2}` ]
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then
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mkdir -p ${TMPFS}`dirname ${2}` >>$LOG 2>&1
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fi
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TARGET=`echo ${TMPFS}${2} | sed -e 's/\/$//'`
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#LINK=`echo ${1} | sed -e "s/^${MNTDIR}//"`
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LINK=`echo ${1} | sed -e "s/^\/sysroot//"`
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echo "ln -sf ${LINK} ${TARGET}" >>$LOG 2>&1
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ln -sf ${LINK} ${TARGET} >>$LOG 2>&1
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;;
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*)
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;;
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esac
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}
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FindFile () {
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# $1 = Pathname to locate
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# $2 = Type of file
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path=$1
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type=$2
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FOUND=0
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for DIR in `ls $TREEMOUNT`
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do
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if [ -e ${TREEMOUNT}/${DIR}${path} ]
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then
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FOUND=1 # we found it!
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ProcessType ${TREEMOUNT}/${DIR}${path} ${path} ${type}
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if [ "${2}" = "con" ]
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then
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1
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else
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break
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fi
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fi
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done
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## Default behavior is to get from the image
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if [ "$FOUND" = "0" ]
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then
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if [ -e "${DEFAULT}${path}" ]
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then
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ProcessType ${DEFAULT}${path} ${path} ${type}
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else
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echo "Could not find ${path} in defaults or any other place" >/dev/console
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fi
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# if it wasn't found, mount rw in tmpfs
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fi
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}
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########################################################################################
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# Start / MAIN / main
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########################################################################################
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# load up our files from xCAT
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GetSyncInfo
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# mount all the tree roots. Usually there's probably only one.
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MountTrees
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# find the file and then see if its the one we need.
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ResolveLinks
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# make sure mtab points to the right place:
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ln -sf /proc/mounts ${TMPFS}/etc/mtab
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# catch all hack for debugging:
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#cp -a ${DEFAULT}/* /.snapshot/tmpfs/
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# foo
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