here is my script to rsync a directory to a zfs filesystem, rotate
existing snapshots, then create a "latest" snapshot.
work to be done
- check for an include/exclude list for the rsync command
- create a monthly snapshot
be careful of possible line wraps
#!/bin/sh
RSYNC_CMD="/usr/local/bin/rsync -axS --delete-delay --stats"
# first argument is the remote server to connect (ie. server1)
# second argument is the remote target (ie. /home/) note trailing slashes just
like in rsync
# third argument is which pool to use (ie. tank)
# fourth argument is what ZFS fileystem on that pool (ie server1/home)
# fifth argument is how many snapshots for this zfs filesystem
RMT_SERVER=$1
RMT_TARGET=$2
LCL_POOL=$3
LCL_ZFS=$4
SNAPCOUNT=$5
OUTFILE=/tmp/rsync_zfs_rotate-${LCL_POOL}-${LCL_ZFS}.log
ERRFILE=/tmp/rsync_zfs_rotate-${LCL_POOL}-${LCL_ZFS}.err
MAILER=/usr/sbin/sendmail
mailto=some...@domain.com
# NO EDITS BELOW THIS
###################################################
# remove any old ERRFILE/OUTFILE to start fresh
rm -f ${OUTFILE}
rm -f ${ERRFILE}
echo "" > $OUTFILE
echo "----------------- RSYNC BEGIN ----------------" >> $OUTFILE
date >> $OUTFILE
echo "" >> $OUTFILE
echo "$RSYNC_CMD $RMT_SERVER:$RMT_TARGET /$LCL_POOL/$LCL_ZFS" >> $OUTFILE
$RSYNC_CMD $RMT_SERVER:$RMT_TARGET /$LCL_POOL/$LCL_ZFS 2> $ERRFILE >> $OUTFILE
ERR=$?
if [ "$ERR" != "0" ] ; then
if [ "$ERR" != "24" ] ; then
echo "Rsync Error Code $ERR" ;
cat $ERRFILE | mailx -s "RSYNC BACKUP ERROR -
${RMT_SERVER}:${RMT_TARGET}" ${MAILTO} ;
exit ;
fi ;
fi ;
echo "" >> $OUTFILE
date >> $OUTFILE
echo "------------------ RSYNC END ------------------" >> $OUTFILE
echo "" >> $OUTFILE
echo "" >> $OUTFILE
echo "" >> $OUTFILE
echo "--------------- BEGIN ZFS ROTATION ------------------" >> $OUTFILE
date >> $OUTFILE
echo "" >> $OUTFILE
echo "Number of snapshots to keep=${SNAPCOUNT}"
SNAPPATH=/${LCL_POOL}/${LCL_ZFS}/.zfs/snapshot
NEWSNAP=${SNAPCOUNT} ;
# destroy the oldest ($SNAPCOUNT) if exists
if [ -d ${SNAPPATH}/${SNAPCOUNT} ] ; then
echo "" ;
echo "Found ${LCL_POOL}/${lcl_z...@${snapcount}" ;
echo "destroying snapshot ${SNAPCOUNT} found for ${LCL_ZFS}" ;
echo "zfs destroy ${LCL_POOL}/${lcl_z...@${snapcount}" ;
echo "destroying snapshot ${SNAPCOUNT} found for ${LCL_ZFS}" >> $OUTFILE
;
echo "zfs destroy ${LCL_POOL}/${lcl_z...@${snapcount}" >> $OUTFILE ;
zfs destroy ${LCL_POOL}/${lcl_z...@${snapcount} 2> $ERRFILE ;
SNAPCOUNT=`expr $SNAPCOUNT - 1` ;
echo "" ;
echo "" ;
fi ;
# start searching for the others
until [ $SNAPCOUNT -lt 1 ]; do
echo "Looking for ${LCL_POOL}/${lcl_z...@${snapcount}" ;
if [ -d ${SNAPPATH}/${SNAPCOUNT} ]; then
OLDSNAP=${SNAPCOUNT} ;
NEWSNAP=${OLDSNAP} ;
NEWSNAP=`expr $NEWSNAP + 1` ;
echo "SNAPCOUNT = ${SNAPCOUNT} NEWSNAP = ${NEWSNAP}" ;
echo "Found ${LCL_POOL}/${lcl_z...@${oldsnap}" ;
echo "" ;
echo "zfs rename ${LCL_POOL}/${lcl_z...@${oldsnap}
${LCL_POOL}/${lcl_z...@${newsnap}" ;
echo "zfs rename ${LCL_POOL}/${lcl_z...@${oldsnap}
${LCL_POOL}/${lcl_z...@${newsnap}" >> $OUTFILE ;
zfs rename ${LCL_POOL}/${lcl_z...@${oldsnap}
${LCL_POOL}/${lcl_z...@${newsnap} 2>> $ERRFILE ;
SNAPCOUNT=`expr $SNAPCOUNT - 1` ;
echo "" ;
echo "" ;
else
OLDSNAP=${SNAPCOUNT} ;
NEWSNAP=${OLDSNAP} ;
NEWSNAP=`expr $NEWSNAP + 1` ;
echo "SNAPCOUNT = ${SNAPCOUNT} NEWSNAP = ${NEWSNAP}" ;
echo "${LCL_POOL}/${lcl_z...@${oldsnap} not found";
echo "${LCL_POOL}/${lcl_z...@${oldsnap} not found" >> $OUTFILE ;
SNAPCOUNT=`expr $SNAPCOUNT - 1` ;
echo "" ;
echo "" ;
fi ;
done ;
# now rotate latest to 1 if exists
if [ -d ${SNAPPATH}/latest ]; then
echo "Found ${LCL_POOL}/${lcl_z...@latest" ;
echo "" ;
zfs rename ${LCL_POOL}/${lcl_z...@latest ${LCL_POOL}/${lcl_z...@1 2>>
$ERRFILE ;
echo "zfs rename ${LCL_POOL}/${lcl_z...@latest ${LCL_POOL}/${lcl_z...@1"
;
echo "zfs rename ${LCL_POOL}/${lcl_z...@latest ${LCL_POOL}/${lcl_z...@1"
>> $OUTFILE ;
echo "" ;
fi ;
# create the latest snapshot
echo "Creating latest snapshot" ;
zfs snapshot ${LCL_POOL}/${lcl_z...@latest 2>> $ERRFILE ;
echo "zfs snapshot ${LCL_POOL}/${lcl_z...@latest" ;
echo "zfs snapshot ${LCL_POOL}/${lcl_z...@latest" >> $OUTFILE ;
echo "" >> $OUTFILE
date >> $OUTFILE
echo "--------------- END ZFS ROTATION ------------------" >> $OUTFILE
echo "" >> $OUTFILE
# now we will send an email with all this
if [ -s ${ERRFILE} ]; then
cat $ERRFILE | mailx -s "BACKUP ERROR - ${RMT_SERVER}:${RMT_TARGET}"
${MAILTO} ;
cat $OUTFILE | mailx -s "BACKUP REPORT - ${RMT_SERVER}:${RMT_TARGET}"
${MAILTO} ;
else
cat $OUTFILE | mailx -s "BACKUP REPORT - ${RMT_SERVER}:${RMT_TARGET}"
${MAILTO} ;
fi ;
--
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