#!/bin/sh
+# backup.sh
+#
+# Backup up Unix-like computers
+#
+# itk@samfundet.no
+#
+# This script was first checked into RCS in 2000, and has since backed up a few
+# servers almost every day, whenever not broken.
+#
+# It's a bit peculiar, but quite effective. The following is worth keeping in
+# mind when hacking:
+#
+# KISS. And by that I mean really simple. Only regular Unix commands, please
+# (but GNU extensions are used).
+#
+# Because of the way we run this script from cron, informational logging goes
+# to stderr and warnings and errors to stdout. This way, we get mail whenever
+# stuff fails, and other output is redirected to the log file.
+#
+# The computers are backed up in parallell (but the filesystems on each
+# computer in serial). This is implemented highly simplistic, with forking
+# subshells. The script has no concept about threads, and stuff might go wrong,
+# which usually requires manual cleanups.
+#
+# The script is halfway Norwegian and halfway English. Newer modifications are
+# in English, we should probably stick to that.
# TODO(sesse, 2007-12-16):
-# * Fiks så parallelliseringen fungerer igjen
# * Bruk tee i stedet for en separat tar ztvf-prosess
# * Sjekk hvorfor .idx-filene til UD er blitt 0 for siste fullbackuper
-# Locking
+# Configuration
LOCKFILE=/home/backup/backuprun.lockfile
+confdir=/home/backup/conf/ # Configuration files
+storagedir=/backup # Where we keep backups
+maksantallfulle=3 # Number of full backups
+dagermellomfulle=30 # Days between full backups
+DATE=`date "+%Y%m%d%H%M"` #format: touch
+DATEs=`date "+%Y-%m-%d %H:%M"` #format: tar
+
+# Exclude-pattern
+exclude=$confdir/exclude
+[ ! -f $exclude ] && printf "tmp\ncore\n" > $exclude
# Initially, we consider everything to be just fine.
R=0
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
PATH=/local/bin:$PATH:/store/bin
export PATH
-#start the logfile
echo `date`": Backup run starting" >&2
umask 027
unixcomputers=$1
fi;
-#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"` #format: touch
-DATEs=`date "+%Y-%m-%d %H:%M"` #format: tar
-###
#selve backupen
# krever at noen variabler er satt
{
echo -n `date` >&2
- printf " $computer: %-${logw}s %s\n" "$computer:$filesystem" "$backuplevel backup" >&2
+ printf " $computer: $computer:$filesystem $backuplevel backup" >&2
if [ "$backuplevel" = "daglig" ] || [ "$backuplevel" = "incremental" ]
then
# 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)
# $lastcmd only files newer than this
+ # --one-file-system don't traverse file systems
# --exclude-from file to get exclusion pattern from
- # pipe to gzip, which in turn pipes over the ssh-stream
- # ..to dd, to output to a file. We surpress messages from dd.
- # And at last, redirect stderr to stdout, to get output logged.
+ # And at last, redirect stdout to stderr, to get output logged.
TARFILE=$DATE.tmp
TARCMD="ssh root@$computer \"$tar --one-file-system -zcf - -C $filesystem . $lastcmd \
--exclude-from=$exf\" > $TARFILE"