-#!/bin/bash
+#!/bin/sh
-PATH=/local/bin:$PATH
-export PATH
-confdir=/home/backup/conf/
+# Locking
+LOCKFILE=/home/backup/backuprun.lockfile
+
+# Initially, we consider everything to be just fine.
+R=0
+
+# Die gracefully (ie. remove lockfile)
+die() {
+ echo `date`": Something nasty happened, and since I fork a lot:"
+ echo `date`": I CANNOT CLEAN UP THE MESS MYSELF."
+ echo `date`": You need to get rid of lost process named stuff like $0, tar and ssh."
+ exit 255
+}
+
+# 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, 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 $remotestatf`
+###
-echo -n "Starter... "
-date
+PATH=/local/bin:$PATH:/store/bin
+export PATH
-#Skriver litt til loggefilen
-echo
-echo "Slik ser regexpen som forteller hva vi ikke skal ta backup av:"
-cat $exclude
-echo
-echo
+#start the logfile
+echo `date`": Backup run starting" >&2
-#newgrp itk
umask 027
-#Maskiner vi skal ta backup av
-unixcomputers=`cat $confdir/computers.unix`
-ntcomputers=`cat $confdir/computers.nt`
+# The computers we want to back up
+unixcomputers=`cat $confdir/computers.unix \
+ | grep -v "^#" \
+ | grep -v "^$" `
+
+# Backup only one computer, from command line?
+if [ $1 ] ; then
+ unixcomputers=$1
+fi;
#disse bør kunne varieres fra fs til fs?
-#disse bør flyttes ut i egen fil som kan editeres fra web kanskje?
-maksantallfulle=2 #hvor mange fulle vi tar vare på
-#maksantalldaglige=30 #hvor mange daglige vi tar vare på
+maksantallfulle=3 #hvor mange fulle vi tar vare på
dagermellomfulle=30 #antall dager før det er på tide med ny full
+logw=40
###
#lager datovariabeler
-DATE=`date "+%Y%m%d%H%M"` #passer for bruk med touch
-DATEs=`date "+%Y-%m-%d %H:%M"` #passer for bruk med tar
+DATE=`date "+%Y%m%d%H%M"` #format: touch
+DATEs=`date "+%Y-%m-%d %H:%M"` #format: tar
###
#selve backupen
backup()
{
- printf "%-50s %s\n" "$computer:$filesystem" "$backuplevel backup"
+ echo -n `date` >&2
+ printf " $computer: %-${logw}s %s\n" "$computer:$filesystem" "$backuplevel backup" >&2
if [ "$backuplevel" = "daglig" ] || [ "$backuplevel" = "incremental" ]
then
- forrige=`cat ../.dato`
- forrigecmd=--newer=\"$forrige\"
+ lastd=`cat ../.date`
+ lastcmd="--newer='$lastd'"
else
- forrigecmd=""
+ lastcmd=""
fi
- #Prøver å ta backup med tar
- if `ssh $computer "cd $filesystem ;\
- tar cfl - . $forrigecmd \
- --exclude-from=/tmp/.backup/exclude \
- | gzip" \
- | dd of=$DATE.tmp 2>/dev/null`
- then
- #Det gikk kanskje bra
- mv $DATE.tmp $DATE.tgz
- #lage listefil og oppdater datofil om det gikk greit
+ #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"`
+
+ #We try to run tar on the remote computer
+ # z gzip it
+ # 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 root@$computer \"$tar --one-file-system -zcf - -C $filesystem . $lastcmd \
+ --exclude-from=$exf\" > $TARFILE"
+ echo `date`" $computer: Running $TARCMD" >&2
+ eval $TARCMD;
+ if [ -s $TARFILE ]; then
+ 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 > ../.dato &&
- touch -t $DATE ../.dato
+ echo $DATEs > ../.date &&
+ touch -t $DATE ../.date
- #lage sortert listefil
+ #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`" $computer: $TARFILE empty. $backuplevel backup of $computer:$filesystem failed and deleted"
+
+ # We don't want to return 0
+ R=1
fi
}
#Løper gjennom listen av unixmaskiner som vi skal ta backup av
for computer in $unixcomputers
do
+(
+ 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."
+
+ # We don't want to return 0
+ R=1
+ # Do next computer
+ continue;
+ fi
#tømmer variabelen for sikkerhets skyld
filesystems=""
#Sjekker nest siste felt i fstab. Om det er 0 tar vi ikke backup
- filesystems=`ssh -n $computer "cat /etc/fstab" \
+ filesystems=`ssh -n root@$computer "cat /etc/fstab" \
| grep -v nfs \
- | grep -v ^# \
+ | grep -v "^#" \
+ | grep -v "^$" \
| awk '{ if ( $(NF-1) != "0" ) print $2}' `
- #Renske opp i katalogen vår på klienten
- ssh $computer "rm -rf /tmp/.backup ; mkdir -m 700 /tmp/.backup"
+ #clean up our dir at this client
+ if ! ssh root@$computer "rm -r ~/.backup ; mkdir -m 700 ~/.backup"; then
+ echo `date`" $computer: Could not create backup staging area at $computer:~/.backup - skipping backup of $computer"
+ # We don't want to return 0
+ R=1
+ continue;
+ fi
- #Prøver å kopiere over $exclude til $computer
- scp $exclude $computer:/tmp/.backup/exclude ||
- echo "Vi klarte ikke kopiere over exclude.txt til $computer :("
+ #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 - skipping backup of $computer"
+ # We don't want to return 0
+ R=1
+ continue;
+ fi
- #Prøver å kopiere over preeexec og postexec om de finnes
- [ -f $confdir/preexec.$computer ] &&
- scp $confdir/preexec.$computer $computer:/tmp/.backup/preexec
- [ -f $confdir/postexec.$computer ] &&
- scp $confdir/postexec.$computer $computer:/tmp/.backup/postexec
+ #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 $computer"
+ R=1
+ continue
+ )
+ )
+
+ #try to run preexec if it exist
+ if ! ssh root@$computer "[ ! -f ~/.backup/preexec ] || /bin/bash -x ~/.backup/preexec" >&2; then
+ echo `date`" $computer: Could not run $computer:~/.backup/preexec - skipping backup of $computer"
+ R=1
+ continue
+ fi
- #Prøver å kjøre preexec om den finnes
- ssh $computer "[ -f /tmp/.backup/preexec ] &&
- /bin/bash -x /tmp/.backup/preexec"
for filesystem in $filesystems
do
#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
+
+ echo $filesystem > ${storagedir}/${computer}/.${sfilesystem}.name
+ chmod 644 ${storagedir}/${computer}/.${sfilesystem}.name
- #standard backuplevel. full og daglig er eneste muligheter
+ #set default backuplevel
backuplevel=daglig
- #backuplevel=full
-
- #lager det som trengs av kataloger
- mkdir -m 755 -p /backup/$computer/$sfilesystem/{full,daglig} 2>/dev/null
- #Bør bare skje ved første gangs kjøring for dette fs
- if [ ! -f /backup/$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
- #Sjekker om det er på tide å slette noen fulle backuper
- 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 full $prefix (for mange)"
+ prefix=`echo $full | sed "s/\.[^.]*$//"`
+ echo `date`": $computer:$filesystem sletter full $prefix (for mange)" >&2
rm $prefix*
done
- #Sjekker om det er på tide å slette noen daglige backuper
- eldste=`ls -t1 /backup/$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 $eldste \
- -printf "$computer:$filesystem sletter daglig %f (for gammel)\n" \
+ $storagedir/$computer/$sfilesystem/daglig \
+ -type f \
+ \! -newer $oldf \
-exec rm {} \;
-
done
- #Prøver å kjøre postexec om den finnes
- ssh $computer "[ -f /tmp/.backup/postexec ] &&
- /bin/bash -x /tmp/.backup/postexec"
+ #try to run postexec if it exist
+ if ! ssh root@$computer "[ ! -f ~/.backup/postexec ] || /bin/bash -x ~/.backup/postexec" >&2; then
+ echo `date`" $computer: Could not run $computer:~/.backup/postexec"
+ R=1
+ fi
-done
+)
+done &
-#Finne de backupene som har tryna og
-#lage en webside med de
-/home/backup/finn_ufullstendige.sh
+wait
-#Lage søkbar indeks over listefilene
-/home/backup/indekser.sh
+# Remove lockfile
+rm $LOCKFILE
-echo -n "Ferdig... "
-date
+# Did anything go wrong?
+# (IMPORTANT NOTE: The R-business does not work as expected, since this script
+# forks itself.
+if [ $R != 0 ]; then
+ echo `date`": Backup run ended with errors, check logs."
+ exit 1
+else
+ echo `date`": Backup run ended" >&2
+fi
projects / backup.sh / blobdiff