4 LOCKFILE=/home/backup/backuprun.lockfile
6 # Initially, we consider everything to be just fine.
9 # Die gracefully (ie. remove lockfile)
11 echo `date`": Something nasty happened, and since I fork a lot:"
12 echo `date`": I CANNOT CLEAN UP THE MESS MYSELF."
13 echo `date`": You need to get rid of lost process named stuff like $0, tar and ssh."
18 trap die SIGINT SIGTERM
20 # Don't start if we're already running
21 if [ -e $LOCKFILE ]; then
22 echo `date`": $LOCKFILE exists, exiting."
28 confdir=/home/backup/conf/ #configuration files
29 storagedir=/backup #mountpoint of huge disc
33 exclude=$confdir/exclude
34 [ ! -f $exclude ] && printf "tmp\ncore\n" > $exclude
37 #syntax of remotestat:
39 remotestatf=$confdir/remotestat
40 [ -f $remotestatf ] && remotestat=`cat $remotestatf`
43 PATH=/local/bin:$PATH:/store/bin
47 echo `date`": Backup run starting"
48 echo "Exclude pattern:"
50 echo "End exclude pattern"
54 # The computers we want to back up
55 unixcomputers=`cat $confdir/computers.unix \
59 # Backup only one computer, from command line?
64 #disse bør kunne varieres fra fs til fs?
65 maksantallfulle=3 #hvor mange fulle vi tar vare på
66 dagermellomfulle=30 #antall dager før det er på tide med ny full
71 DATE=`date "+%Y%m%d%H%M"` #format: touch
72 DATEs=`date "+%Y-%m-%d %H:%M"` #format: tar
76 # krever at noen variabler er satt
77 # krever at vi er i rett katalog
81 printf "%-${logw}s %s\n" "$computer:$filesystem" "$backuplevel backup"
83 if [ "$backuplevel" = "daglig" ] || [ "$backuplevel" = "incremental" ]
86 lastcmd="--newer='$lastd'"
91 #if this client has a special tar
92 #we need to find a better solution to this conf-issue
93 if [ -f $confdir/tar.$computer ] ; then
94 tar=`cat $confdir/tar.$computer`
99 #expand the exclude-path for use with tar
100 exf=`ssh $computer "ls ~/.backup/exclude"`
102 #We try to run tar on the remote computer
105 # C change to directory first
106 # - output to stdout (we pipe to gzip, then to dd)
107 # . where to start taring (see C)
108 # $lastcmd only files newer than this
109 # --exclude-from file to get exclusion pattern from
110 # pipe to gzip, which in turn pipes over the ssh-stream
111 # ..to dd, to output to a file. We surpress messages from dd.
112 # And at last, redirect stderr to stdout, to get output logged.
114 TARCMD="ssh $computer \"$tar --one-file-system -zcf - -C $filesystem . $lastcmd \
115 --exclude-from=$exf\" > $TARFILE"
116 echo "cmdline: $TARCMD"
118 if eval $TARCMD; then
119 mv $TARFILE $DATE.tgz
121 #update the datefile if the filelist is ok.
122 tar tvfz $DATE.tgz > $DATE.idx 2>&1 &&
123 echo $DATEs > ../.date &&
124 touch -t $DATE ../.date
126 #make a sortet filelist
127 grep -v ^d $DATE.idx | sort -n -r +2 > $DATE.sdx
130 chmod 600 *tgz #only for us
131 chmod 644 *sdx *idx 2>/dev/null #everyone can read
136 echo `date`": $TARFILE empty. $backuplevel backup of $computer:$filesystem failed and deleted"
138 # We don't want to return 0
144 #Løper gjennom listen av unixmaskiner som vi skal ta backup av
145 for computer in $unixcomputers
148 echo `date`": Backing up $computer"
150 # Try to SSH to the computer without entering a password.
151 if `ssh -n -o NumberOfPasswordPrompts=0 $computer /bin/true`; then
152 echo "Passwordless SSH to $computer works."
154 echo "Could not use passwordless SSH to $computer."
156 # We don't want to return 0
161 #tømmer variabelen for sikkerhets skyld
164 #Sjekker nest siste felt i fstab. Om det er 0 tar vi ikke backup
165 filesystems=`ssh -n $computer "cat /etc/fstab" \
169 | awk '{ if ( $(NF-1) != "0" ) print $2}' `
171 echo "Filesystems to backup on $computer: $filesystems"
173 #clean up our dir at this client
174 if ! ssh $computer "rm -r ~/.backup ; mkdir -m 700 ~/.backup"; then
175 echo "Could not create backup staging area at $computer:~/.backup"
176 # We don't want to return 0
181 #try to copy $exclude to $computer
182 if ! scp $exclude $computer:~/.backup/exclude > /dev/null; then
183 echo "Could not copy exclude.txt to $computer"
184 # We don't want to return 0
189 #try to copy preeexec and postexec if they exist
190 # TODO: Gah, clean this mess!
191 [ -f $confdir/preexec.$computer ] && (
192 scp $confdir/preexec.$computer $computer:~/.backup/preexec ||
193 ( echo "Could not copy preexec.$computer to $computer:~/.backup/preexec";
198 [ -f $confdir/postexec.$computer ] && (
199 scp $confdir/postexec.$computer $computer:~/.backup/postexec ||
200 ( echo "Could not copy postexec.$computer to $computer:~/.backup/postexec"
206 #try to run preexec if it exist
207 ssh $computer "[ -f ~/.backup/preexec ] && /bin/bash -x ~/.backup/preexec"
209 for filesystem in $filesystems
211 #lager en variant uten tegnet "/" eller $ (gjelder NT)
212 sfilesystem=`echo $filesystem | tr '\/\$' '__'`
214 #lager det som trengs av kataloger
215 mkdir -m 755 -p $storagedir/$computer/$sfilesystem/{full,daglig} 2>/dev/null
217 echo $filesystem > ${storagedir}/${computer}/.${sfilesystem}.name
218 chmod 644 ${storagedir}/${computer}/.${sfilesystem}.name
220 #set default backuplevel
223 if [ ! -f $storagedir/$computer/$sfilesystem/.date ]
225 #take the first full backup of this filesystem on this computer
227 echo $DATEs > $storagedir/$computer/$sfilesystem/.date
230 #sjekker om det er på tide med en full
231 if [ -z "`find $storagedir/$computer/$sfilesystem/full/ -name \*tgz -mtime -$dagermellomfulle`" ]; then
235 #gå ned i rett katalog, eller dø
236 # TODO bør sende mail om dette skjer!
237 cd $storagedir/$computer/$sfilesystem/$backuplevel || die
239 #perform the actual backup
242 # Sjekk om det skal være et annet antall fulle backuper av en boks
243 if [ -f $confdir/maksfulle.$computer ] ; then
244 mf=$((`cat $confdir/maksfulle.$computer`+1))
246 mf=$(($maksantallfulle+1))
249 #delete complete backups
250 for full in `ls -1t $storagedir/$computer/$sfilesystem/full/*tgz | tail +$mf`
252 prefix=`echo $full | sed "s/\.[^.]*$//"`
253 echo "$computer:$filesystem sletter full $prefix (for mange)"
257 #delete incremental backups older than the oldest complete backup
258 oldf=`ls -t1 $storagedir/$computer/$sfilesystem/full/*tgz | tail -1`
260 $storagedir/$computer/$sfilesystem/daglig \
266 #try to run postexec if it exist
267 ssh $computer "[ -f ~/.backup/postexec ] && /bin/bash -x ~/.backup/postexec"
274 # print diskusage to logfile
275 echo "Current disk usage:"
281 # Did anything go wrong?
283 echo `date`": Backup run ended with errors, check logs."
286 echo `date`": Backup run ended"