Updated October 22, 2004
Created October 21, 2004

     1	#!/bin/bash
     2	
     3	# Our configuration files are next to our script...
     4	cd `dirname $0`
     5	
     6	# Script options:
     7	
     8	# Add any global flags such as "--exclude /data" and more into 
     9	# the file called rsyncflags (it is empty by default).
    10	
    11	RSYNCFLAGS=`cat snapshot-rsyncflags | grep -v ^# | grep -v "^$"`
    12	
    13	# Add your clients to a file called snapshot-clients.
    14	
    15	# Add any excludes for any clients to clientname-exclude.  Note 
    16	# that this script tries to grab the separate partitions and 
    17	# pull each one.  Also the rsync command is configured to not 
    18	# cross mounted filesystems (i.e. proc, ...)
    19	
    20	# To automate this, you should 1) lock down this computer 
    21	# (firewall for everything except _maybe_ ssh, 2) set good 
    22	# passwords, 3) limit how many accounts can get in, 4) finally 
    23	# add this accounts public key into authorized_keys of /root/.ssh 
    24	# of each computer you will be snapshotting in this manner.  Be 
    25	# warned, once you set up those passwordless keys, you must 
    26	# protect this local account with the utmost security.
    27	
    28	# Cycle through all the clients we wish to get a snapshot of
    29	for CLIENT in `cat snapshot-clients | grep -v ^# | grep -v "^$"`; do
    30	echo starting on client $CLIENT [`date`]
    31		DATE=`date "+%Y%m%d%H%M%S"`
    32		HOMEDIR="/snapshot/$CLIENT"
    33		mkdir -p $HOMEDIR
    34		DESTINATION="$HOMEDIR/$DATE"
    35		LAST=`ls $HOMEDIR | tail -1`
    36		mkdir -p $DESTINATION
    37		if [ -n "$LAST" ]; then
    38			# pre-populate $DESTINATION to not rely entirely on
    39			# remote rsync version numbers.  i.e. more reliable
    40			# this way.
    41			cp -al $HOMEDIR/$LAST/* $DESTINATION 2>/dev/null
    42		fi
    43	
    44		# guess local partitions to grab:
    45		PARTITIONS=`ssh root@10.0.127.248 "cat /proc/partitions"`
    46		MOUNTS=`ssh root@10.0.127.248 "mount"`
    47		LOCALPARTITIONS=`echo "$PARTITIONS" | grep [0-9]$ \
    48				| awk '{print $4}' \
    49				| while read REPLY; do \
    50				echo "$MOUNTS" | grep $REPLY; \
    51				done | awk '{print $3}'`
    52	
    53		if [ -z "$LOCALPARTITIONS" ]; then
    54			# Oops. Machine down? No access?  Who knows...
    55			echo could not get partition listing for $CLIENT
    56			# skip it and move to next client.
    57			break
    58		fi
    59	
    60		# perform snapshot
    61		for SOURCE in $LOCALPARTITIONS; do
    62	echo Starting on partition [$SOURCE] [`date`]
    63	
    64			if [ "$SOURCE" = "/" ]; then
    65				THISDEST=${DESTINATION}/TheRootDir
    66			else
    67				THISDEST=${DESTINATION}/`echo ${SOURCE} \
    68					| sed -e 's~/~_~g' -e 's/^_//'`
    69			fi
    70	
    71			mkdir -p $THISDEST
    72	
    73			# Add in the client name/ip to the source item
    74			SOURCE=`echo $SOURCE | sed -e "s/^/${CLIENT}:/"`
    75	
    76			if [ -z "$SOURCE" ]; then continue; fi
    77	
    78			# I'll leave this commented for now, it is untested.
    79			#if [ -f "${CLIENT}-exclude" -a -n "`cat ${CLIENT}-exclude`" ]; then
    80			#	RSYNCFLAGS="$RSYNCFLAGS --exclude-from `cat ${CLIENT}-exclude`"
    81			#fi
    82	
    83			rsync --hard-links $RSYNCFLAGS --delete -e ssh -ax ${SOURCE}/ $THISDEST
    84	echo Finished with partition [$SOURCE] [$THISDEST] [`date`]
    85		done
    86	echo Finished with Client $CLIENT [`date`]
    87	done