-#!/bin/bash
+#!/bin/sh
+
+# 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
export PATH
#start the logfile
-date
-echo
-echo "Exclude pattern:"
-cat $exclude
-echo
-echo
+echo `date`": Backup run starting" >&2
umask 027
# The computers we want to back up
-unixcomputers=`cat $confdir/computers.unix`
-###
+unixcomputers=`cat $confdir/computers.unix \
+ | grep -v "^#" \
+ | grep -v "^$" `
+
+# Backup only one computer, from command line?
+if [ $1 ] ; then
+ unixcomputers=$1
+fi;
#disse bør kunne varieres fra fs til fs?
-maksantallfulle=2 #hvor mange fulle vi tar vare på
+maksantallfulle=3 #hvor mange fulle vi tar vare på
dagermellomfulle=30 #antall dager før det er på tide med ny full
logw=40
###
backup()
{
- printf "%-${logw}s %s\n" "$computer:$filesystem" "$backuplevel backup"
+ echo -n `date` >&2
+ printf " $computer: %-${logw}s %s\n" "$computer:$filesystem" "$backuplevel backup" >&2
if [ "$backuplevel" = "daglig" ] || [ "$backuplevel" = "incremental" ]
then
- forrige=`cat ../.date`
- forrigecmd="--newer=\"$forrige\""
+ lastd=`cat ../.date`
+ lastcmd="--newer='$lastd'"
else
- forrigecmd=""
+ 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 $computer "ls ~/.backup/exclude"`
+
#We try to run tar on the remote computer
- if `ssh $computer ". /tmp/.backup/env ;\
- cd $filesystem ;\
- tar cfl - . $forrigecmd \
- --exclude-from=/tmp/.backup/exclude \
- | gzip" \
- | dd of=$DATE.tmp 2>/dev/null`
- then
- #perhaps it did work
- mv $DATE.tmp $DATE.tgz
+ # 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 $computer \"$tar --one-file-system -zcf - -C $filesystem . $lastcmd \
+ --exclude-from=$exf\" > $TARFILE"
+ echo `date`" $computer: Running $TARCMD" >&2
+
+ if eval $TARCMD; then
+ 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`" $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 $computer /bin/true`; then
+ echo `date`" $computer: Could not use passwordless SSH."
+
+ # We don't want to return 0
+ R=1
+ 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 ". /tmp/.backup/env ; cat /etc/fstab" \
+ filesystems=`ssh -n $computer "cat /etc/fstab" \
| grep -v nfs \
- | grep -v ^# \
+ | grep -v "^#" \
+ | grep -v "^$" \
| awk '{ if ( $(NF-1) != "0" ) print $2}' `
#clean up our dir at this client
- ssh $computer "rm -rf /tmp/.backup ; mkdir -m 700 /tmp/.backup"
+ if ! ssh $computer "rm -r ~/.backup ; mkdir -m 700 ~/.backup"; then
+ echo `date`" $computer: Could not create backup staging area at $computer:~/.backup"
+ # We don't want to return 0
+ R=1
+ break;
+ fi
#try to copy $exclude to $computer
- scp $exclude $computer:/tmp/.backup/exclude ||
- echo "could not copy exclude.txt to $computer :("
-
- #create env if it does not exist
- if [ ! -f $confdir/env.$computer ]
- touch $confdir/env.$computer
-
- #copy env to client
- scp $confdir/env.$computer $computer:/tmp/.backup/env
+ if ! scp $exclude $computer:~/.backup/exclude > /dev/null; then
+ echo `date`" $computer: Could not copy exclude.txt to $computer"
+ # We don't want to return 0
+ R=1
+ break;
+ fi
#try to copy preeexec and postexec if they exist
- [ -f $confdir/preexec.$computer ] &&
- scp $confdir/preexec.$computer $computer:/tmp/.backup/preexec
- [ -f $confdir/postexec.$computer ] &&
- scp $confdir/postexec.$computer $computer:/tmp/.backup/postexec
+# TODO: Gah, clean this mess!
+ [ -f $confdir/preexec.$computer ] && (
+ scp $confdir/preexec.$computer $computer:~/.backup/preexec ||
+ ( echo `date`" $computer: Could not copy preexec.$computer to $computer:~/.backup/preexec";
+ R=1
+ break
+ )
+ )
+ [ -f $confdir/postexec.$computer ] && (
+ scp $confdir/postexec.$computer $computer:~/.backup/postexec ||
+ ( echo `date`" $computer: Could not copy postexec.$computer to $computer:~/.backup/postexec"
+ break
+ R=1
+ )
+ )
#try to run preexec if it exist
- ssh $computer ". /tmp/.backup/env ; [ -f /tmp/.backup/preexec ] && /bin/bash -x /tmp/.backup/preexec"
+ ssh $computer "[ -f ~/.backup/preexec ] && /bin/bash -x ~/.backup/preexec"
for filesystem in $filesystems
do
#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 $full|cut -d . -f 1`
- echo "$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
-type f \
\! -newer $oldf \
-exec rm {} \;
- #denne funker bare med gnu find
- #-printf "$computer:$filesystem sletter daglig %f (for gammel)\n" \
-
done
#try to run postexec if it exist
- ssh $computer ". /tmp/.backup/env ; [ -f /tmp/.backup/postexec ] && /bin/bash -x /tmp/.backup/postexec"
+ 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
+
+# Remove lockfile
+rm $LOCKFILE
-date
+# Did anything go wrong?
+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