-#!/bin/sh
+#!/bin/bash
# backup.sh
#
# Backup up Unix-like computers
# mind when hacking:
#
# KISS. And by that I mean really simple. Only regular Unix commands, please
-# (but GNU extensions are used).
+# (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.
#
-# The computers are backed up in parallell (but the filesystems on each
+# The computers are backed up in parallel (but the filesystems on each
# computer in serial). This is implemented highly simplistic, with forking
# subshells. The script has no concept about threads, and stuff might go wrong,
# which usually requires manual cleanups.
#
# The script is halfway Norwegian and halfway English. Newer modifications are
# in English, we should probably stick to that.
-
-# TODO(sesse, 2007-12-16):
-# * Sjekk hvorfor .idx-filene til UD er blitt 0 for siste fullbackuper
-# * Rydde uleselig kode fra linje 211 og litt nedover
+#
+# Known issues:
+#
+# o $R has no proper meaning because of the forking subshell stuff. We need a
+# more robust way of returning non-zero on errors, which we probably don't
+# right now.
+#
# Configuration
LOCKFILE=/home/backup/backuprun.lockfile
-confdir=/home/backup/conf/ # Configuration files
-storagedir=/backup # Where we keep backups
-maksantallfulle=3 # Number of full backups
-dagermellomfulle=30 # Days between full backups
-DATE=`date "+%Y%m%d%H%M"` #format: touch
-DATEs=`date "+%Y-%m-%d %H:%M"` #format: tar
+confdir=/home/backup/conf/ # Configuration files
+storagedir=/backup # Where we keep backups
+maksantallfulle=3 # Number of full backups
+dagermellomfulle=30 # Days between full backups
+dagermellomfulleforfast=32 # Days between full backups for machines with fixed
+ # full-backup date (in case the fixed day gets missed)
+DAY_OF_MONTH=`date "+%d" | sed s/^0//` # from 1 to 31
+DATE=`date "+%Y%m%d%H%M"` #format: touch
+DATEs=`date "+%Y-%m-%d %H:%M"` #format: tar
# Exclude-pattern
exclude=$confdir/exclude
# Don't start if we're already running
if [ -e $LOCKFILE ]; then
- echo `date`": $LOCKFILE exists, exiting."
- echo `date`": $LOCKFILE exists, exiting." >&2
+ echo `date`": $LOCKFILE exists for pid `cat $LOCKFILE`, exiting."
+ echo `date`": $LOCKFILE exists for pid `cat $LOCKFILE`, exiting." >&2
exit 1
fi;
touch $LOCKFILE
+echo $$ > $LOCKFILE
#syntax of remotestat:
#hostname:/directory/
{
echo -n `date` >&2
- printf " $computer: $computer:$filesystem $backuplevel backup" >&2
+ printf " $computer: $computer:$filesystem $backuplevel backup\n" >&2
if [ "$backuplevel" = "daglig" ] || [ "$backuplevel" = "incremental" ]
then
lastcmd=""
fi
- #if this client has a special tar
- #we need to find a better solution to this conf-issue
- if [ -f $confdir/tar.$computer ] ; then
- tar=`cat $confdir/tar.$computer`
- else
- tar=tar
- fi
-
# expand the exclude-path for use with tar
exf=`ssh root@$computer "ls ~/.backup/exclude"`
# Pipe the stuff over ssh to ourselves, run pee to cat the contents to a
# file and build a file list, respectivly.
TARFILE=$DATE.tmp
- TARCMD="ssh root@$computer \"$tar --one-file-system -zcf - -C $filesystem . $lastcmd \
- --exclude-from=$exf\" | pee \"cat > $TARFILE\" \"tar tvf -\""
+ TARCMD="ssh root@$computer \"nice -n 19 ionice -c3 tar --one-file-system -zcf - -C $filesystem . $lastcmd \
+ --exclude-from=$exf\" | pee \"cat > $TARFILE\" \"tar tzvf -\""
echo `date`" $computer: Running $TARCMD" >&2
eval $TARCMD > $DATE.idx
# Update timestamp
echo $DATEs > ../.date && touch -t $DATE ../.date
- # Make a sorted filelist
- grep -v ^d $DATE.idx | sort -n -r -k 2 > $DATE.sdx
+ # Make a sorted filelist as well
+ sort -k6 < $DATE.idx > $DATE.sdx
# Fix permissions
chmod 600 *tgz #only for us
fi
# Try to copy preeexec and postexec if they exist
-# TODO: Gah, clean this mess!
- [ -f $confdir/preexec.$computer ] && (
- scp $confdir/preexec.$computer root@$computer:~/.backup/preexec >&2 ||
- ( echo `date`" $computer: Could not copy preexec.$computer to $computer:~/.backup/preexec - skipping backup of $computer"
- R=1
- continue
- )
- )
- [ -f $confdir/postexec.$computer ] && (
- scp $confdir/postexec.$computer root@$computer:~/.backup/postexec >&2 ||
- ( echo `date`" $computer: Could not copy postexec.$computer to $computer:~/.backup/postexec - skipping backup of $computer"
- R=1
- continue
- )
- )
+ 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 - skipping backup of $computer"
+ R=1
+ continue
+ 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 - skipping backup of $computer"
+ R=1
+ continue
+ fi
+ fi
# Try to run preexec if it exist
if ! ssh root@$computer "[ ! -f ~/.backup/preexec ] || /bin/bash -x ~/.backup/preexec" >&2; then
echo $DATEs > $storagedir/$computer/$sfilesystem/.date
fi
- # Check if we want a full backup
- if [ -z "`find $storagedir/$computer/$sfilesystem/full/ -name \*tgz -mtime -$dagermellomfulle`" ]; then
+ # Check if we want a full backup - Debug statement that causes noise in cron mail:
+ # printf " $computer $filesystem: $confdir/fastfullbackupdag.$computer.$sfilesystem\n"
+ 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
projects / backup.sh / blobdiff