# It's a bit peculiar, but quite effective. The following is worth keeping in
# mind when hacking:
#
-# KISS. And by that I mean really simple. Only regular Unix commands, please
-# (but GNU extensions are used and moreutils has to be installed).
-#
# Because of the way we run this script from cron, informational logging goes
# to stderr and warnings and errors to stdout. This way, we get mail whenever
# stuff fails, and other output is redirected to the log file.
LOCKFILE=/home/backup/backuprun.lockfile.$computer
confdir=/home/backup/conf/ # Configuration files
storagedir=/backup # Where we keep backups
-maksantallfulle=3 # Number of full backups
-dagermellomfulle=30 # Days between full backups
-dagermellomfulleforfast=32 # Days between full backups for machines with fixed
+maxnumfull=3 # Number of full backups
+daysbetweenfull=30 # Days between full backups
+daysbetweenfullforfixed=32 # Days between full backups for machines with fixed
# full-backup date (in case the fixed day gets missed)
DAY_OF_MONTH=`date "+%d" | sed s/^0//` # from 1 to 31
DATE=`date "+%Y%m%d%H%M"` #format: touch
# Die more or less gracefully (at least notify user)
die() {
- echo `date`": Something nasty happened. Ending, and not deleting lockfile $LOCKFILE."
+ warnmsg "Aborting."
+ rm $LOCKFILE
exit 1
}
+diemsg() {
+ warnmsg "$@"
+ die
+}
+warnmsg() {
+ echo `date`": $computer: $@"
+ echo `date`": $computer: $@" >&2
+}
+infomsg() {
+ echo `date`": $computer: $@" >&2
+}
# Trap C-c and kill
trap die SIGINT SIGTERM
# Don't start if we're already running
if [ -e $LOCKFILE ]; then
- echo `date`": $LOCKFILE exists for pid `cat $LOCKFILE`, exiting."
- echo `date`": $LOCKFILE exists for pid `cat $LOCKFILE`, exiting." >&2
- exit 1
+ diemsg "$LOCKFILE exists for pid `cat $LOCKFILE`."
fi;
touch $LOCKFILE
echo $$ > $LOCKFILE
-echo `date`": Backup run starting" >&2
+infomsg "Backup run starting"
umask 027
-
backup()
{
+ infomsg "$computer:$filesystem $backuplevel backup"
+
+ localsnar="${storagedir}/${computer}/${sfilesystem}/.incremental.snar"
+ remotesnar="/root/.backup/${sfilesystem}.snar"
+ if [ "$backuplevel" = "daglig" ]; then
+ # If incremental backup, we need to copy the incremental status to $computer.
+ # If it does not exist, whine a bit and then run date-based instead.
+ if [ -s "$localsnar" ]; then
+ if ! scp $localsnar root@$computer:$remotesnar; then
+ diemsg "Could not copy .incremental.snar to $computer"
+ fi
+ lastcmd="--listed-incremental=$remotesnar --no-check-device"
+ else
+ infomsg "Missing incremental.snar for $filesystem, doing date-based backup instead until next full backup"
+ remotesnar=""
+ lastd=`cat ../.date`
+ lastcmd="--newer='$lastd'"
+ fi
+ else
+ # Note: Since we rm-ed .backup previously, and we don't scp over
+ # anything in this branch, this file will not exist, and we
+ # will be doing a full backup (but we want the output of it).
+ lastcmd="--listed-incremental=$remotesnar"
+ fi
+
+ # We try to run tar on the remote computer
+ # c create archive
+ # C change to directory first
+ # . where to start taring (see C)
+ # $lastcmd only files newer than this
+ # --one-file-system don't traverse file systems
+ # --use-compress-program compress it using gzip or pigz
+ # --exclude-from file to get exclusion pattern from
+ # Pipe the stuff over ssh to ourselves, run pee to cat the contents to a
+ # file and build a file list, respectivly.
+ TARFILE=$DATE.tmp
+ TARCMD="ssh root@$computer \"nice -n 19 ionice -c3 tar --one-file-system --use-compress-program $compressor -cf - -C $filesystem . $lastcmd \
+ --exclude-from=/root/.backup/exclude\" | pee \"cat > $TARFILE\" \"tar tzvf -\""
+ infomsg "Running $TARCMD"
+ eval $TARCMD > $DATE.idx
+
+ if [ $? -eq 0 ] && [ -s $TARFILE ]; then
+ # File is >0 in size and neither cat or tar tzvf failed; we assume it worked.
+
+ if [ "$remotesnar" ]; then
+ if ! scp root@$computer:$remotesnar $localsnar.tmp; then
+ diemsg "Could not copy .incremental.snar from $computer"
+ fi
+ fi
+
+ # Move tar file in place
+ mv $TARFILE $DATE.tgz
+ if [ "$remotesnar" ]; then
+ mv $localsnar.tmp $localsnar
+ fi
+
+ # Update timestamp
+ echo $DATEs > ../.date && touch -t $DATE ../.date
+
+ # Make a sorted file list as well
+ sort -k6 < $DATE.idx > $DATE.sdx
+
+ # Fix permissions
+ chmod 600 *tgz #only for us
+ chmod 644 *sdx *idx 2>/dev/null #everyone can read
+
+ # Let the remote computer know that we ran a successful backup (for nagios)
+ ssh root@$computer touch $filesystem/.lastbackup
+ else
+ # Something wrong happened.
+ rm $TARFILE
+ diemsg "tar failed or $TARFILE empty. $backuplevel backup of $computer:$filesystem failed and deleted"
+ fi
+}
- echo -n `date` >&2
- printf " $computer: $computer:$filesystem $backuplevel backup\n" >&2
-
- SNARFILE="${storagedir}/${computer}/${sfilesystem}/.incremental.snar"
- incrementalsnar="/root/.backup/${sfilesystem}.snar"
- if [ "$backuplevel" = "daglig" ]
- then
- # If incremental backup, we need to copy the incremental status to $computer.
- # If it does not exist, whine a bit and then run date-based instead.
- if [ -s "$SNARFILE" ]; then
- if ! scp $SNARFILE root@$computer:$incrementalsnar; then
- echo `date`" $computer: Could not copy .incremental.snar to $computer"
- die
- fi
- lastcmd="--listed-incremental=$incrementalsnar --no-check-device"
- else
- echo `date`" $computer: Missing incremental.snar for $filesystem, doing date-based backup instead until next full backup" >&2
- incrementalsnar=""
- lastd=`cat ../.date`
- lastcmd="--newer='$lastd'"
- fi
- else
- lastcmd="--listed-incremental=$incrementalsnar"
- fi
-
- # expand the exclude-path for use with tar
- exf=`ssh root@$computer "ls ~/.backup/exclude"`
-
- # We try to run tar on the remote computer
- # c create archive
- # C change to directory first
- # . where to start taring (see C)
- # $lastcmd only files newer than this
- # --one-file-system don't traverse file systems
- # --use-compress-program compress it using gzip or pigz
- # --exclude-from file to get exclusion pattern from
- # Pipe the stuff over ssh to ourselves, run pee to cat the contents to a
- # file and build a file list, respectivly.
- TARFILE=$DATE.tmp
- TARCMD="ssh root@$computer \"nice -n 19 ionice -c3 tar --one-file-system --use-compress-program $compressor -cf - -C $filesystem . $lastcmd \
- --exclude-from=$exf\" | pee \"cat > $TARFILE\" \"tar tzvf -\""
- echo `date`" $computer: Running $TARCMD" >&2
- eval $TARCMD > $DATE.idx
-
- if [ $? -eq 0 ] && [ -s $TARFILE ]; then
- # File is >0 in size and neither cat or tar tzvf failed; we assume it worked.
-
- if ! scp root@$computer:$incrementalsnar $SNARFILE.tmp; then
- echo `date`" $computer: Could not copy .incremental.snar from $computer"
- die
- fi
-
- # Move tar file in place
- mv $TARFILE $DATE.tgz
- mv $SNARFILE.tmp $SNARFILE
-
- # Update timestamp
- echo $DATEs > ../.date && touch -t $DATE ../.date
-
- # Make a sorted file list as well
- sort -k6 < $DATE.idx > $DATE.sdx
-
- # Fix permissions
- chmod 600 *tgz #only for us
- chmod 644 *sdx *idx 2>/dev/null #everyone can read
-
- # Let the remote computer know that we ran a successful backup (for nagios)
- ssh root@$computer touch $filesystem/.lastbackup
-
- else
- # Something wrong happened.
- rm $TARFILE
- echo `date`" $computer: $TARFILE empty. $backuplevel backup of $computer:$filesystem failed and deleted"
- die
- fi
+# Check that the target filesystem is mounted (actually check that it's not
+# the root filesystem)
+if [ ! -d "$storagedir/$computer" ]; then
+ diemsg "Target filesystem ($storagedir/$computer) does not exist."
+fi
+rootfilesystem=`df -P /`
+targetfilesystem=`df -P "$storagedir/$computer"`
+if [ "$rootfilesystem" == "$targetfilesystem" ]; then
+ diemsg "Target filesystem ($storagedir/$computer) was mounted on /."
+fi
-}
+infomsg "Backing up $computer"
- # Check that the target filesystem is mounted (actually check that it's not
- # the root filesystem)
- if [ ! -d "$storagedir/$computer" ]; then
- echo `date`" $computer: Target filesystem ($storagedir/$computer) does not exist. Aborting"
- die
- fi
- rootfilesystem=`df -P /`
- targetfilesystem=`df -P "$storagedir/$computer"`
- if [ "$rootfilesystem" == "$targetfilesystem" ]; then
- echo `date`" $computer: Target filesystem ($storagedir/$computer) was mounted on /. Aborting"
- die
- fi
-
- echo `date`" $computer: Backing up $computer" >&2
-
- # Try to SSH to the computer without entering a password.
- if ! `ssh -n -o NumberOfPasswordPrompts=0 root@$computer /bin/true`; then
- echo `date`" $computer: Could not use passwordless SSH."
- die
- fi
-
- # Check if pigz is available
- if ssh -n root@$computer "pigz -V 2>/dev/null"; then
- compressor=pigz
- else
- echo `date`" $computer: pigz missing; falling back to gzip."
- compressor=gzip
- fi
-
- # Check dump bit in fstab
- filesystems=`ssh -n root@$computer "cat /etc/fstab" \
- | grep -v nfs \
- | grep -v "^#" \
- | grep -v "^$" \
- | awk '{ if ( $(NF-1) != "0" ) print $2}' `
-
- # Clean up our dir at this client
- if ! ssh root@$computer "rm -r ~/.backup ; mkdir -m 700 ~/.backup"; then
- echo `date`" $computer: Could not create backup staging area at $computer:~/.backup"
- die
- fi
-
- # Try to copy $exclude to $computer
- if ! scp $exclude root@$computer:~/.backup/exclude > /dev/null; then
- echo `date`" $computer: Could not copy exclude.txt to $computer"
- die
- fi
-
- # Try to copy preeexec and postexec if they exist
- if [ -f $confdir/preexec.$computer ]; then
- if ! scp $confdir/preexec.$computer root@$computer:~/.backup/preexec >&2; then
- echo `date`" $computer: Could not copy preexec.$computer to $computer:~/.backup/preexec"
- die
- fi
- fi
- if [ -f $confdir/postexec.$computer ]; then
- if ! scp $confdir/postexec.$computer root@$computer:~/.backup/postexec >&2; then
- echo `date`" $computer: Could not copy postexec.$computer to $computer:~/.backup/postexec"
- die
- fi
- fi
-
- # Try to run preexec if it exists
- if ! ssh root@$computer "[ ! -f ~/.backup/preexec ] || /bin/bash -x ~/.backup/preexec" >&2; then
- echo `date`" $computer: Could not run $computer:~/.backup/preexec"
- die
- fi
-
-
- for filesystem in $filesystems
- do
- # Remove / and $ (for Windows) for path names
- sfilesystem=`echo $filesystem | tr '\/\$' '__'`
-
- # Prepare storage area
- mkdir -m 755 -p $storagedir/$computer/$sfilesystem/full 2>/dev/null
- mkdir -m 755 -p $storagedir/$computer/$sfilesystem/daglig 2>/dev/null
-
- # Default backuplevel
- backuplevel=daglig
-
- if [ ! -f $storagedir/$computer/$sfilesystem/.date ]
- then
- # Take the first full backup of this filesystem on this computer
- backuplevel=full
- echo $DATEs > $storagedir/$computer/$sfilesystem/.date
- fi
-
- # Check if we want a full backup
- if [ -f $confdir/fastfullbackupdag.$computer.$sfilesystem ]; then
- fullbackup_min_for_this_machine=$dagermellomfulleforfast
- if [ "$DAY_OF_MONTH" = "`cat $confdir/fastfullbackupdag.$computer.$sfilesystem`" ]; then
- backuplevel=full
- fi
- elif [ -f $confdir/fastfullbackupdag.$computer ]; then
- fullbackup_min_for_this_machine=$dagermellomfulleforfast
- if [ "$DAY_OF_MONTH" = "`cat $confdir/fastfullbackupdag.$computer`" ]; then
- backuplevel=full
- fi
- else
- fullbackup_min_for_this_machine=$dagermellomfulle
- fi
-
- if [ -z "`find $storagedir/$computer/$sfilesystem/full/ -name \*tgz -mtime -$fullbackup_min_for_this_machine`" ]; then
- backuplevel=full
- fi
-
- # We want to be here
- cd $storagedir/$computer/$sfilesystem/$backuplevel || die
-
- # Perform the actual backup
- backup
-
- # Check if this box has a custom number of full backups
- if [ -f $confdir/maksfulle.$computer ] ; then
- mf=$((`cat $confdir/maksfulle.$computer`+1))
- else
- mf=$(($maksantallfulle+1))
- fi
-
- # Delete old full backups
- for full in `ls -1t $storagedir/$computer/$sfilesystem/full/*tgz | tail -n +$mf`
- do
- prefix=`echo $full | sed "s/\.[^.]*$//"`
- echo `date`": $computer:$filesystem Deleting full backup $prefix" >&2
- rm $prefix*
- done
-
- # Delete incremental backups older than the oldest full backup
- oldf=`ls -t1 $storagedir/$computer/$sfilesystem/full/*tgz | tail -1`
- find \
- $storagedir/$computer/$sfilesystem/daglig \
- -type f \
- \! -newer $oldf \
- -printf "`date`: $computer: Deleting old incremental backup: %p\n" \
- -exec rm {} \; >&2
- done
-
- # Try to run postexec if it exist
- if ! ssh root@$computer "[ ! -f ~/.backup/postexec ] || /bin/bash -x ~/.backup/postexec" >&2; then
- echo `date`" $computer: Could not run $computer:~/.backup/postexec"
- die
- fi
+# Try to SSH to the computer without entering a password.
+if ! ssh -n -o NumberOfPasswordPrompts=0 root@$computer /bin/true; then
+ diemsg "Could not use passwordless SSH."
+fi
+
+# Check if pigz is available
+if ssh -n root@$computer "pigz -V 2>/dev/null"; then
+ compressor=pigz
+else
+ infomsg "pigz missing; falling back to gzip."
+ compressor=gzip
+fi
+
+# Check dump bit in fstab
+filesystems=`ssh -n root@$computer "cat /etc/fstab" \
+ | grep -v nfs \
+ | grep -v "^#" \
+ | grep -v "^$" \
+ | awk '{ if ( $(NF-1) != "0" ) print $2}' `
+
+# Clean up our dir at this client
+if ! ssh root@$computer "rm -r /root/.backup ; mkdir -m 700 /root/.backup"; then
+ diemsg "Could not create backup staging area at $computer:/root/.backup"
+fi
+
+# Try to copy $exclude to $computer
+if ! scp $exclude root@$computer:/root/.backup/exclude > /dev/null; then
+ diemsg "Could not copy exclude.txt to $computer"
+fi
+
+# Try to copy preeexec and postexec if they exist
+if [ -f $confdir/preexec.$computer ]; then
+ if ! scp $confdir/preexec.$computer root@$computer:/root/.backup/preexec >&2; then
+ diemsg "Could not copy preexec.$computer to $computer:/root/.backup/preexec"
+ fi
+fi
+if [ -f $confdir/postexec.$computer ]; then
+ if ! scp $confdir/postexec.$computer root@$computer:/root/.backup/postexec >&2; then
+ diemsg "Could not copy postexec.$computer to $computer:/root/.backup/postexec"
+ fi
+fi
+
+# Try to run preexec if it exists
+if ! ssh root@$computer "[ ! -f /root/.backup/preexec ] || /bin/bash -x /root/.backup/preexec" >&2; then
+ diemsg "Could not run $computer:/root/.backup/preexec"
+fi
+
+for filesystem in $filesystems; do
+ # Remove / and $ (for Windows) for path names
+ sfilesystem=`echo $filesystem | tr '\/\$' '__'`
+
+ # Prepare storage area
+ mkdir -m 755 -p $storagedir/$computer/$sfilesystem/full 2>/dev/null
+ mkdir -m 755 -p $storagedir/$computer/$sfilesystem/daglig 2>/dev/null
+
+ # Default backuplevel
+ backuplevel=daglig
+
+ if [ ! -s $storagedir/$computer/$sfilesystem/.date ]; then
+ # Take the first full backup of this filesystem on this computer
+ backuplevel=full
+ fi
+
+ # Check if we want a full backup
+ if [ -f $confdir/fastfullbackupdag.$computer.$sfilesystem ]; then
+ fullbackup_min_for_this_machine=$daysbetweenfullforfixed
+ if [ "$DAY_OF_MONTH" = "`cat $confdir/fastfullbackupdag.$computer.$sfilesystem`" ]; then
+ backuplevel=full
+ fi
+ elif [ -f $confdir/fastfullbackupdag.$computer ]; then
+ fullbackup_min_for_this_machine=$daysbetweenfullforfixed
+ if [ "$DAY_OF_MONTH" = "`cat $confdir/fastfullbackupdag.$computer`" ]; then
+ backuplevel=full
+ fi
+ else
+ fullbackup_min_for_this_machine=$daysbetweenfull
+ fi
+
+ if [ -z "`find $storagedir/$computer/$sfilesystem/full/ -name \*tgz -mtime -$fullbackup_min_for_this_machine`" ]; then
+ backuplevel=full
+ fi
+
+ # We want to be here
+ cd $storagedir/$computer/$sfilesystem/$backuplevel || diemsg "$storagedir/$computer/$sfilesystem/$backuplevel does not exist"
+
+ # Perform the actual backup
+ backup
+
+ # Check if this box has a custom number of full backups
+ if [ -f $confdir/maksfulle.$computer.$sfilesystem ]; then
+ mf=$((`cat $confdir/maksfulle.$computer`+1))
+ elif [ -f $confdir/maksfulle.$computer ] ; then
+ mf=$((`cat $confdir/maksfulle.$computer`+1))
+ else
+ mf=$(($maxnumfull+1))
+ fi
+
+ # Delete old full backups
+ for full in `ls -1t $storagedir/$computer/$sfilesystem/full/*tgz | tail -n +$mf`; do
+ prefix=`echo $full | sed "s/\.[^.]*$//"`
+ infomsg "$computer:$filesystem Deleting full backup $prefix"
+ rm $prefix*
+ done
+
+ # Delete incremental backups older than the oldest full backup
+ oldf=`ls -t1 $storagedir/$computer/$sfilesystem/full/*tgz | tail -1`
+ find \
+ $storagedir/$computer/$sfilesystem/daglig \
+ -type f \
+ \! -newer $oldf \
+ -printf "`date`: $computer: Deleting old incremental backup: %p\n" \
+ -exec rm {} \; >&2
+done
+
+# Try to run postexec if it exist
+if ! ssh root@$computer "[ ! -f /root/.backup/postexec ] || /bin/bash -x /root/.backup/postexec" >&2; then
+ diemsg "Could not run $computer:/root/.backup/postexec"
+fi
+
+# Use warn so that we will get an email even on success.
+warnmsg "$computer: Backup completed successfully."
# Remove lockfile
rm $LOCKFILE
projects / backup.sh / blobdiff