-#!/bin/bash
+#!/bin/sh
-PATH=/local/bin:$PATH
+# 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 $LOCKFILE
+
+#dirs
+confdir=/home/backup/conf/ #configuration files
+storagedir=/backup #mountpoint of huge disc
+###
+
+#exclude-pattern
+exclude=$confdir/exclude
+[ ! -f $exclude ] && printf "tmp\ncore\n" > $exclude
+###
+
+#syntax of remotestat:
+#hostname:/directory/
+remotestatf=$confdir/remotestat
+[ -f $remotestatf ] && remotestat=`cat $remotestatf`
+###
+
+PATH=/local/bin:$PATH:/store/bin
export PATH
-echo -n "Starter... "
-date
+#start the logfile
+echo `date`": Backup run starting"
+echo "Exclude pattern:"
+cat $exclude
+echo "End exclude pattern"
-#newgrp itk
umask 027
-#liste over maskinene vi tar backup av. (space mellom maskinnavn)
-computers="cirkus backup josef"
-#for debug
-#computers="josef"
+# The computers we want to back up
+unixcomputers=`cat $confdir/computers.unix \
+ | grep -v "^#" \
+ | grep -v "^$" `
+
+
+if [ $1 ] ; then
+ unixcomputers=$1
+fi;
###
-#disse bør kunne varieres fra fs til fs
-maksantallfulle=2 #hvor mange fulle vi tar vare på
-#maksantalldaglige=30 #hvor mange daglige vi tar vare på
+#disse bør kunne varieres fra fs til fs?
+maksantallfulle=3 #hvor mange fulle vi tar vare på
dagermellomfulle=30 #antall dager før det er på tide med ny full
+logw=40
###
#lager datovariabeler
-DATE=`date "+%Y%m%d%H%M"` #passer for bruk med touch
-DATEs=`date "+%Y-%m-%d %H:%M"` #passer for bruk med tar
+DATE=`date "+%Y%m%d%H%M"` #format: touch
+DATEs=`date "+%Y-%m-%d %H:%M"` #format: tar
###
#selve backupen
backup()
{
- if [ "$backuplevel" = "daglig" ]
+ printf "%-${logw}s %s\n" "$computer:$filesystem" "$backuplevel backup"
+
+ if [ "$backuplevel" = "daglig" ] || [ "$backuplevel" = "incremental" ]
then
- forrige=`cat ../.dato`
- forrigecmd=--newer=\"$forrige\"
+ lastd=`cat ../.date`
+ lastcmd="--newer='$lastd'"
else
- forrigecmd=""
+ lastcmd=""
fi
- if `ssh $computer "cd $filesystem ;\
- tar cfl - . $forrigecmd \
- --exclude=\"tmp\" \
- --exclude=\".netscape/cache\" \
- --exclude=\"core\" \
- --exclude=\"*.rar\" \
- --exclude=\"*.mp3\" \
- --exclude=\"*.MP3\" \
- --exclude=\"*.iso\" \
- --exclude=\"*.rar\" \
- | gzip" \
- | dd of=$DATE.tmp 2>/dev/null`
- then
- #Det gikk kanskje bra
- mv $DATE.tmp $DATE.tgz
- #lage listefil
- tar tvfz $DATE.tgz > $DATE.idx 2>&1
- grep -v ^d $DATE.idx | sort -n -r +2 > $DATE.sdx
+ #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 $computer "ls ~/.backup/exclude"`
+
+ #We try to run tar on the remote computer
+ # 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
- #oppdatere datofil
- echo $DATEs > ../.dato
- touch -t $DATE ../.dato
+ # 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 $TARFILE $DATE.tgz
+ #make a filelist.
+ #update the datefile if the filelist is ok.
+ tar tvfz $DATE.tgz > $DATE.idx 2>&1 &&
+ echo $DATEs > ../.date &&
+ touch -t $DATE ../.date
+
+ #make a sortet filelist
+ grep -v ^d $DATE.idx | sort -n -r +2 > $DATE.sdx
- #fikse rettigheter
- chmod 600 *tgz
- chmod 644 *sdx *idx
+ #fix perm
+ chmod 600 *tgz #only for us
+ chmod 644 *sdx *idx 2>/dev/null #everyone can read
else
- #Det gikk ikke bra
- rm $DATE.tmp
- echo "$backuplevel backup av $computer:$filesystem gikk ikke bra"
+ #it did not work
+ rm $TARFILE
+ echo `date`": $TARFILE empty. $backuplevel backup of $computer:$filesystem failed and deleted"
fi
+
}
-for computer in $computers
+#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}' `
- #for debugging
- #filesystems="/"
+ echo "Filesystems to backup on $computer: $filesystems"
+
+ #clean up our dir at this client
+ 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
+ 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 $computer:~/.backup/preexec ||
+ ( echo "Could not copy preexec.$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"
for filesystem in $filesystems
do
- #lager en variant uten tegnet "/"
- sfilesystem=`echo $filesystem | tr '/' '_'`
+ #lager en variant uten tegnet "/" eller $ (gjelder NT)
+ sfilesystem=`echo $filesystem | tr '\/\$' '__'`
- #
- echo $filesystem > /backup/$computer/$sfilesystem.navn
- chmod 644 /backup/$computer/$sfilesystem.navn
+ #lager det som trengs av kataloger
+ mkdir -m 755 -p $storagedir/$computer/$sfilesystem/{full,daglig} 2>/dev/null
- #standard backuplevel. full og daglig er eneste muligheter
- backuplevel=daglig
- #backuplevel=full
+ echo $filesystem > ${storagedir}/${computer}/.${sfilesystem}.name
+ chmod 644 ${storagedir}/${computer}/.${sfilesystem}.name
- #lager det som trengs av kataloger
- mkdir -m 755 -p /backup/$computer/$sfilesystem/{full,daglig} 2>/dev/null
+ #set default backuplevel
+ backuplevel=daglig
- #Bør bare skje ved første gangs kjøring for dette fs
- if [ ! -f /backup/$computer/$sfilesystem/.dato ]
+ if [ ! -f $storagedir/$computer/$sfilesystem/.date ]
then
+ #take the first full backup of this filesystem on this computer
backuplevel=full
- echo $DATEs > /backup/$computer/$sfilesystem/.dato
- echo "$computer:$filesystem datofil laget"
- echo "$computer:$filesystem trenger full pga ingen fra foer"
+ echo $DATEs > $storagedir/$computer/$sfilesystem/.date
fi
#sjekker om det er på tide med en full
- if
- [ -z `find /backup/$computer/$sfilesystem/full/ -name \*tgz -mtime -$dagermellomfulle` ]
- then
- echo "$computer:$filesystem trenger full pga lenge siden sist"
+ if [ -z "`find $storagedir/$computer/$sfilesystem/full/ -name \*tgz -mtime -$dagermellomfulle`" ]; then
backuplevel=full
fi
- #gå ned i rett katalog
- cd /backup/$computer/$sfilesystem/$backuplevel
+ #gå ned i rett katalog, eller dø
+ # TODO bør sende mail om dette skjer!
+ cd $storagedir/$computer/$sfilesystem/$backuplevel || die
- #selve backupen
+ #perform the actual backup
backup
- echo "$computer:$filesystem sletter fulle slik at vi ikke har mer enn 2"
- mf=$(($maksantallfulle+1))
- for full in `ls -1t /backup/$computer/$sfilesystem/full/*tgz | tail +$mf`
+ # 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
+ for full in `ls -1t $storagedir/$computer/$sfilesystem/full/*tgz | tail +$mf`
do
- prefix=`echo $full|cut -d . -f 1`
- echo "$computer:$filesystem sletter $prefix"
+ prefix=`echo $full | sed "s/\.[^.]*$//"`
+ echo "$computer:$filesystem sletter full $prefix (for mange)"
rm $prefix*
done
- echo "$computer:$filesystem ferdig med slett av fulle"
- echo "$computer:$filesystem slette daglige eldre enn eldste fulle"
- eldste=`ls -t1 /backup/$computer/$sfilesystem/full/*tgz | tail -1`
+ #delete incremental backups older than the oldest complete backup
+ oldf=`ls -t1 $storagedir/$computer/$sfilesystem/full/*tgz | tail -1`
find \
- /backup/$computer/$sfilesystem/daglig \
- \! -newer $eldste \
- -print \
+ $storagedir/$computer/$sfilesystem/daglig \
+ -type f \
+ \! -newer $oldf \
-exec rm {} \;
- echo "$computer:$filesystem ferdig med slett av gamle daglige"
-
+# #denne funker bare med gnu find
+# #-printf "$computer:$filesystem sletter daglig %f (for gammel)\n"
done
-done
+ #try to run postexec if it exist
+ ssh $computer "[ -f ~/.backup/postexec ] && /bin/bash -x ~/.backup/postexec"
+
+)
+done &
+
+wait
+
+# print diskusage to logfile
+echo "Current disk usage:"
+df -k $storagedir
-#Finne de backupene som har tryna og
-#lage en webside med de
-/home/backup/finn_ufullstendige.sh
+echo `date`": Backup run ended"
-echo -n "Ferdig... "
-date
projects / backup.sh / blobdiff