-#!/bin/bash
+#!/bin/sh
+
+# Locking
+LOCKFILE=/home/backup/backuprun.lockfile
+
+# Die gracefully (ie. remove lockfile)
+die() {
+ rm $LOCKFILE
+ exit 255
+}
+
+trap die SIGINT SIGTERM
+
+if [ -e $LOCKFILE ]; then
+ echo `date`": $LOCKFILE exists, exiting."
+ exit 1
+fi;
+touch $LOCKFILE
#dirs
confdir=/home/backup/conf/ #configuration files
export PATH
#start the logfile
-date
-echo
+echo `date`": Backup run starting"
echo "Exclude pattern:"
cat $exclude
-echo
-echo
+echo "End exclude pattern"
umask 027
# The computers we want to back up
-unixcomputers=`cat $confdir/computers.unix`
+unixcomputers=`cat $confdir/computers.unix \
+ | grep -v "^#" \
+ | grep -v "^$" `
+
+
+if [ $1 ] ; then
+ unixcomputers=$1
+fi;
###
#disse bør kunne varieres fra fs til fs?
-maksantallfulle=4 #hvor mange fulle vi tar vare på
+maksantallfulle=3 #hvor mange fulle vi tar vare på
dagermellomfulle=30 #antall dager før det er på tide med ny full
logw=40
###
if [ "$backuplevel" = "daglig" ] || [ "$backuplevel" = "incremental" ]
then
lastd=`cat ../.date`
- lastcmd="--newer=\"$lastd\""
+ lastcmd="--newer='$lastd'"
else
lastcmd=""
fi
exf=`ssh $computer "ls ~/.backup/exclude"`
#We try to run tar on the remote computer
- # C is instead of 'cd $filesystem'
- # - is 'this directory'
- # l is 'stay in local filesystem
- if `ssh $computer "$tar cfCl - $filesystem . $lastcmd \
- --exclude-from=$exf \
- | gzip" \
- | dd of=$DATE.tmp 2>/dev/null`
- then
+ # c create archive
+ # C change to directory first
+ # - output to stdout (we pipe to gzip, then to dd)
+ # . where to start taring (see C)
+ # $lastcmd only files newer than this
+ # --exclude-from file to get exclusion pattern from
+ # pipe to gzip, which in turn pipes over the ssh-stream
+ # ..to dd, to output to a file. We surpress messages from dd.
+ # And at last, redirect stderr to stdout, to get output logged.
+ TARFILE=$DATE.tmp
+ TARCMD="ssh $computer \"$tar --one-file-system -cf - -C $filesystem . $lastcmd \
+ --exclude-from=$exf | gzip\" | (dd of=$TARFILE 2> /dev/null) 2>&1"
+ echo "cmdline: $TARCMD"
+ eval $TARCMD
+
+ # Ideally, we should check wether the tar command returned 0 or not, but it
+ # seems a pipe in bash returns the value of the last command in the pipe.
+ # Instead, we check wether the resulting file has zero size, in which case we
+ # consider it an error.
+ if [ -s $TARFILE ]; then
+ echo `date`": command probably ran without errors."
#perhaps it did work
- mv $DATE.tmp $DATE.tgz
+ mv $TARFILE $DATE.tgz
#make a filelist.
#update the datefile if the filelist is ok.
tar tvfz $DATE.tgz > $DATE.idx 2>&1 &&
else
#it did not work
- rm $DATE.tmp 2>/dev/null
- echo "$backuplevel backup of $computer:$filesystem failed and deleted"
+ rm $TARFILE
+ echo `date`": $TARFILE empty. $backuplevel backup of $computer:$filesystem failed and deleted"
fi
}
#Løper gjennom listen av unixmaskiner som vi skal ta backup av
for computer in $unixcomputers
do
+(
+ echo `date`": Backing up $computer"
+
+ # Try to SSH to the computer without entering a password.
+ if `ssh -n -o NumberOfPasswordPrompts=0 $computer /bin/true`; then
+ echo "Passwordless SSH to $computer works."
+ else
+ echo "Could not use passwordless SSH to $computer."
+ break;
+ fi
#tømmer variabelen for sikkerhets skyld
filesystems=""
#Sjekker nest siste felt i fstab. Om det er 0 tar vi ikke backup
filesystems=`ssh -n $computer "cat /etc/fstab" \
| grep -v nfs \
- | grep -v ^# \
+ | grep -v "^#" \
+ | grep -v "^$" \
| awk '{ if ( $(NF-1) != "0" ) print $2}' `
+ echo "Filesystems to backup on $computer: $filesystems"
+
#clean up our dir at this client
- ssh $computer "rm -r ~/.backup ; mkdir -m 700 ~/.backup"
+ if ! ssh $computer "rm -r ~/.backup ; mkdir -m 700 ~/.backup"; then
+ echo "Could not create backup staging area at $computer:~/.backup"
+ break;
+ fi
#try to copy $exclude to $computer
- scp $exclude $computer:~/.backup/exclude ||
- echo "could not copy exclude.txt to $computer :("
+ if ! scp $exclude $computer:~/.backup/exclude > /dev/null; then
+ echo "Could not copy exclude.txt to $computer"
+ break;
+ fi
#try to copy preeexec and postexec if they exist
- [ -f $confdir/preexec.$computer ] &&
- scp $confdir/preexec.$computer $computer:~/.backup/preexec
- [ -f $confdir/postexec.$computer ] &&
- scp $confdir/postexec.$computer $computer:~/.backup/postexec
+ [ -f $confdir/preexec.$computer ] && (
+ scp $confdir/preexec.$computer $computer:~/.backup/preexec ||
+ ( echo "Could not copy preexec.$computer to $computer:~/.backup/preexec"; break )
+ )
+ [ -f $confdir/postexec.$computer ] && (
+ scp $confdir/postexec.$computer $computer:~/.backup/postexec ||
+ ( echo "Could not copy postexec.$computer to $computer:~/.backup/postexec"; break )
+ )
#try to run preexec if it exist
ssh $computer "[ -f ~/.backup/preexec ] && /bin/bash -x ~/.backup/preexec"
#lager det som trengs av kataloger
mkdir -m 755 -p $storagedir/$computer/$sfilesystem/{full,daglig} 2>/dev/null
- #
echo $filesystem > ${storagedir}/${computer}/.${sfilesystem}.name
chmod 644 ${storagedir}/${computer}/.${sfilesystem}.name
fi
#sjekker om det er på tide med en full
- if
- [ -z "`find $storagedir/$computer/$sfilesystem/full/ -name \*tgz -mtime -$dagermellomfulle`" ]
- then
+ if [ -z "`find $storagedir/$computer/$sfilesystem/full/ -name \*tgz -mtime -$dagermellomfulle`" ]; then
backuplevel=full
fi
- #gå ned i rett katalog
- cd $storagedir/$computer/$sfilesystem/$backuplevel
+ #gå ned i rett katalog, eller dø
+ # TODO bør sende mail om dette skjer!
+ cd $storagedir/$computer/$sfilesystem/$backuplevel || die
#perform the actual backup
backup
+ # Sjekk om det skal være et annet antall fulle backuper av en boks
+ if [ -f $confdir/maksfulle.$computer ] ; then
+ mf=$((`cat $confdir/maksfulle.$computer`+1))
+ else
+ mf=$(($maksantallfulle+1))
+ fi
+
#delete complete backups
- mf=$(($maksantallfulle+1))
for full in `ls -1t $storagedir/$computer/$sfilesystem/full/*tgz | tail +$mf`
do
- prefix=`echo $full|cut -d . -f 1`
+ prefix=`echo $full | sed "s/\.[^.]*$//"`
echo "$computer:$filesystem sletter full $prefix (for mange)"
rm $prefix*
done
-type f \
\! -newer $oldf \
-exec rm {} \;
- #denne funker bare med gnu find
- #-printf "$computer:$filesystem sletter daglig %f (for gammel)\n" \
-
+# #denne funker bare med gnu find
+# #-printf "$computer:$filesystem sletter daglig %f (for gammel)\n"
done
#try to run postexec if it exist
ssh $computer "[ -f ~/.backup/postexec ] && /bin/bash -x ~/.backup/postexec"
-done
+)
+done &
-#create report
-/home/backup/report.sh $storagedir > /tmp/report.txt
-#[ ! -z $remotestat ] && scp /tmp/report.txt $remotestat
-###
+wait
# print diskusage to logfile
-df -k
+echo "Current disk usage:"
+df -k $storagedir
+
+echo `date`": Backup run ended"
-date
projects / backup.sh / blobdiff