bin/backup-script

   1 #!/bin/bash
   2 #
   3 # backup-script system for cloning systems using rsync
   4 # Copyright (c)2008-2013 Alexander Barton, alex@barton.de
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 # Please read the file COPYING, README and AUTHORS for more information.
  11 #
  12
  13 NAME=`basename $0`
  14 CONF_D="/etc/backup-script.d"
  15 VERBOSE=0
  16 PIDFILE="/var/run/$NAME.pid"
  17
  18 export LC_ALL=C
  19
  20 declare -i count_all=0
  21 declare -i count_started=0
  22 declare -i count_ok=0
  23 declare -i count_ok_vanished=0
  24
  25 destinations=""
  26 pre_exec=""
  27 post_exec=""
  28 default_target=""
  29 default_user="root"
  30
  31 if [ "$1" == "-p" -o "$1" == "--progress" ]; then
  32         VERBOSE=1
  33         shift
  34 fi
  35
  36 case "$1" in
  37     "-"*)
  38         echo "Usage: $NAME [-p|--preogress] [<system> [<system> [...]]]"
  39         exit 1
  40         ;;
  41 esac
  42
  43 Log() {
  44         logger -t "$NAME" "$*"
  45 }
  46
  47 Message() {
  48         echo "$*"
  49 }
  50
  51 MessageLog() {
  52         Log "$*"
  53         Message "$*"
  54 }
  55
  56 CleanUp() {
  57         if [ -n "$post_exec" ]; then
  58                 echo "Executing \"$post_exec\" ..."
  59                 sh -c $post_exec
  60                 if [ $? -ne 0 ]; then
  61                         echo "Warning: post-exec command failed!"
  62                 fi
  63                 echo
  64         fi
  65         rm -f "$PIDFILE"
  66 }
  67
  68 GotSignal() {
  69         echo
  70         echo "--> Got break signal, cleaning up & aborting ..."
  71         echo
  72         CleanUp
  73         echo -n "Aborted: "; date
  74         echo
  75         exit 9
  76 }
  77
  78 if [ $# -ge 1 ]; then
  79         for s in $@; do
  80                 if [ ! -r "${CONF_D}/$s" ]; then
  81                         echo "$NAME: Can' read \"${CONF_D}/$s\"!"
  82                         exit 1
  83                 fi
  84                 sys="$sys ${CONF_D}/$s"
  85         done
  86 else
  87         sys=${CONF_D}/*
  88 fi
  89
  90 trap GotSignal SIGINT
  91
  92 Log "Started ..."
  93
  94 echo -n "Started: "; date
  95 echo
  96
  97 [ -r "${CONF_D}/backup-script.conf" ] && source "${CONF_D}/backup-script.conf"
  98
  99 # check and create PID file
 100 if [ -e "$PIDFILE" ]; then
 101         Log "Lockfile \"$PIDFILE\" already exists. Aborting!"
 102         echo "Lockfile \"$PIDFILE\" already exists."
 103         echo "Is an other instance still running?"
 104         echo
 105         echo -n "Aborted: "; date
 106         echo
 107         exit 3
 108 fi
 109 touch "$PIDFILE" 2>/dev/null
 110 if [ $? -ne 0 ]; then
 111         echo "Warning: can't create PID file \"$PIDFILE\"!"
 112         echo
 113 else
 114         echo "$$" >>"$PIDFILE"
 115 fi
 116
 117 if [ -n "$pre_exec" ]; then
 118         echo "Executing \"$pre_exec\" ..."
 119         sh -c $pre_exec
 120         if [ $? -ne 0 ]; then
 121                 echo "Error: pre-exec command failed!"; echo
 122                 CleanUp
 123                 echo "Aborting backup."; echo
 124                 exit 2
 125         fi
 126         sleep 2
 127         echo
 128 fi
 129
 130 for f in $sys; do
 131         [ -r "$f" -a -f "$f" ] || continue
 132
 133         system=`basename $f`
 134         user="$default_user"
 135         target="$default_target"
 136         ssh_args_add=""
 137         rsync_args_add=""
 138         compress=1
 139         ping=1
 140         local=0
 141
 142         case "$system" in
 143                 "backup-script.conf"|*.sh)
 144                         continue
 145                         ;;
 146         esac
 147
 148         # Read in configuration file
 149         source "$f"
 150
 151         [ "$local" -eq 0 ] \
 152                 && MessageLog "Working on \"$system\" ..." \
 153                 || MessageLog "Working on \"$system\" (local system) ..."
 154
 155         count_all=$count_all+1
 156
 157         # Check target directory
 158         if [ -z "$target" ]; then
 159                 MessageLog "No target directory specified for \"$system\"!? Skipped."
 160                 echo; continue
 161         fi
 162         if [ ! -d "$target" ]; then
 163                 MessageLog "Target \"$target\" is not a directory!? \"$system\" skipped."
 164                 echo; continue
 165         fi
 166
 167         destdir="$target"
 168         target="$target/$system"
 169         mkdir -p "$target"
 170
 171         if [ "$local" -eq 0 -a "$ping" -ne 0 ]; then
 172                 # Check if system is alive
 173                 ping -c 1 "$system" >/dev/null 2>&1
 174                 if [ $? -ne 0 ]; then
 175                         MessageLog "Host \"$system\" seems not to be alive!? Skipped."
 176                         echo; continue
 177                 fi
 178                 Message "OK, host \"$system\" seems to be alive."
 179         fi
 180
 181         ssh_cmd="ssh"
 182         [ -n "$ssh_args_add" ] && ssh_cmd="$ssh_cmd $ssh_args_add"
 183
 184         cmd="rsync --archive"
 185         [ "$compress" -ne 0 ] && cmd="$cmd --compress"
 186         cmd="$cmd --rsh=\"$ssh_cmd\" --delete --delete-excluded --sparse"
 187         [ "$VERBOSE" -gt 0 ] && cmd="$cmd --progress"
 188         cmd="$cmd --exclude=/BACKUP --exclude=/backup --exclude=/mnt"
 189         cmd="$cmd --exclude=/dev --exclude=/proc --exclude=/sys"
 190         cmd="$cmd --exclude=/usr/src --exclude=/usr/local/src"
 191         cmd="$cmd --exclude=/var/cache/apt --exclude=/var/amavis/blocked"
 192         cmd="$cmd --exclude=/var/log --exclude=/tmp --exclude=/var/tmp"
 193         [ -n "$rsync_args_add" ] && cmd="$cmd $rsync_args_add"
 194
 195         [ "$local" -eq 0 ] \
 196                 && cmd="$cmd ${user}@${system}:/ $target" \
 197                 || cmd="$cmd / $target"
 198
 199         Message "Calling: $cmd"
 200         echo -n "Start date: "; date
 201         count_started=$count_started+1
 202         rm -f "$target/.stamp"
 203
 204         $SHELL -c "$cmd"; ret=$?
 205         echo "code=$ret" >"$target/.stamp"
 206
 207         if [ $ret -eq 20 ]; then
 208                 MessageLog "Backup of \"$system\" interrupted. Aborting ..."
 209                 CleanUp
 210                 exit 1
 211         fi
 212
 213         if [ $ret -eq 0 -o $ret -eq 24 ]; then
 214                 [ $ret -eq 24 ] && count_ok_vanished=$count_ok_vanished+1
 215
 216                 MessageLog "System \"$system\" completed with status $ret, OK."
 217                 count_ok=$count_ok+1
 218         else
 219                 MessageLog "System \"$system\" completed with ERRORS, code $ret!"
 220         fi
 221         echo -n "End date: "; date
 222
 223         destinations="$destinations $destdir"
 224         echo
 225 done
 226
 227 sync
 228
 229 Log "Done: $count_all jobs, $count_started started, $count_ok completed without errors."
 230
 231 paths=$( echo $destinations | sed -e 's/ /\n/g' | sort | uniq )
 232 if [ -n "$paths" ]; then
 233         df -h $paths
 234         echo
 235 fi
 236
 237 CleanUp
 238
 239 echo -n "Done: "; date
 240 echo
 241 echo " - $count_all jobs defined,"
 242 echo " - $count_started jobs started,"
 243 echo " - $count_ok done without errors."
 244 echo
 245
 246 if [ $count_started -ne $count_ok ]; then
 247         echo "----->  THERE HAVE BEEN ERRORS!  <-----"
 248         echo
 249 fi
 250
 251 # -eof-