# 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."
+ echo `date`": Something nasty happened."
+ rm $LOCKFILE
exit 1
}
+diemsg() {
+ echo `date`": $computer: $@"
+ die
+}
# Trap C-c and kill
trap die SIGINT SIGTERM
# If it does not exist, whine a bit and then run date-based instead.
if [ -s "$SNARFILE" ]; then
if ! scp $SNARFILE root@$computer:$incrementalsnar; then
- echo `date`" $computer: Could not copy .incremental.snar to $computer"
- die
+ diemsg "Could not copy .incremental.snar to $computer"
fi
lastcmd="--listed-incremental=$incrementalsnar --no-check-device"
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
# 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 -\""
+ --exclude-from=/root/.backup/exclude\" | 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 $computer"
- die
+
+ if [ "$incrementalsnar" ]; then
+ if ! scp root@$computer:$incrementalsnar $SNARFILE.tmp; then
+ diemsg "Could not copy .incremental.snar from $computer"
+ fi
fi
# Move tar file in place
else
# Something wrong happened.
rm $TARFILE
- echo `date`" $computer: $TARFILE empty. $backuplevel backup of $computer:$filesystem failed and deleted"
- die
+ diemsg "tar failed or $TARFILE empty. $backuplevel backup of $computer:$filesystem failed and deleted"
fi
}
# 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/$computer) does not exist. Aborting"
- die
+ diemsg "Target filesystem ($storagedir/$computer) does not exist. Aborting"
fi
rootfilesystem=`df -P /`
targetfilesystem=`df -P "$storagedir/$computer"`
if [ "$rootfilesystem" == "$targetfilesystem" ]; then
- echo `date`" $computer: Target filesystem ($storagedir/$computer) was mounted on /. Aborting"
- die
+ diemsg "Target filesystem ($storagedir/$computer) was mounted on /. Aborting"
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
+ diemsg "Could not use passwordless SSH."
fi
# Check if pigz is available
| 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 $computer:~/.backup"
- die
+if ! ssh root@$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:~/.backup/exclude > /dev/null; then
- echo `date`" $computer: Could not copy exclude.txt to $computer"
- die
+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:~/.backup/preexec >&2; then
- echo `date`" $computer: Could not copy preexec.$computer to $computer:~/.backup/preexec"
- die
+ 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:~/.backup/postexec >&2; then
- echo `date`" $computer: Could not copy postexec.$computer to $computer:~/.backup/postexec"
- die
+ 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 ~/.backup/preexec ] || /bin/bash -x ~/.backup/preexec" >&2; then
- echo `date`" $computer: Could not run $computer:~/.backup/preexec"
- die
+if ! ssh root@$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
+for filesystem in $filesystems; do
# Remove / and $ (for Windows) for path names
sfilesystem=`echo $filesystem | tr '\/\$' '__'`
# Default backuplevel
backuplevel=daglig
- if [ ! -f $storagedir/$computer/$sfilesystem/.date ]
+ if [ ! -s $storagedir/$computer/$sfilesystem/.date ]
then
# Take the first full backup of this filesystem on this computer
backuplevel=full
# Check if we want a full backup
if [ -f $confdir/fastfullbackupdag.$computer.$sfilesystem ]; then
- fullbackup_min_for_this_machine=$dagermellomfulleforfast
+ 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=$dagermellomfulleforfast
+ fullbackup_min_for_this_machine=$daysbetweenfullforfixed
if [ "$DAY_OF_MONTH" = "`cat $confdir/fastfullbackupdag.$computer`" ]; then
backuplevel=full
fi
else
- fullbackup_min_for_this_machine=$dagermellomfulle
+ fullbackup_min_for_this_machine=$daysbetweenfull
fi
if [ -z "`find $storagedir/$computer/$sfilesystem/full/ -name \*tgz -mtime -$fullbackup_min_for_this_machine`" ]; then
fi
# We want to be here
- cd $storagedir/$computer/$sfilesystem/$backuplevel || die
+ cd $storagedir/$computer/$sfilesystem/$backuplevelmsg || die "$storagedir/$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 ] ; then
+ 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=$(($maksantallfulle+1))
+ mf=$(($maxnumfull+1))
fi
# Delete old full backups
- for full in `ls -1t $storagedir/$computer/$sfilesystem/full/*tgz | tail -n +$mf`
- do
+ 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 $prefix*
done
# Try to run postexec if it exist
-if ! ssh root@$computer "[ ! -f ~/.backup/postexec ] || /bin/bash -x ~/.backup/postexec" >&2; then
- echo `date`" $computer: Could not run $computer:~/.backup/postexec"
- die
+if ! ssh root@$computer "[ ! -f /root/.backup/postexec ] || /bin/bash -x /root/.backup/postexec" >&2; then
+ diemsg "Could not run $computer:/root/.backup/postexec"
fi
# Remove lockfile
projects / backup.sh / blobdiff