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 $0`
  14 CONF_D="/etc/backup-script.d"
  15 PIDFILE="/var/run/$NAME.pid"
  16
  17 DRYRUN=0
  18 VERBOSE=0
  19
  20 export LC_ALL=C
  21
  22 declare -i count_all=0
  23 declare -i count_started=0
  24 declare -i count_ok=0
  25 declare -i count_ok_vanished=0
  26
  27 destinations=""
  28 pre_exec=""
  29 post_exec=""
  30 default_target=""
  31 default_user="root"
  32
  33 Usage() {
  34         echo "Usage: $NAME [<options>] [<system> [<system> [...]]]"
  35         echo
  36         echo "  -p, --progress    Show progress, see rsync(1)."
  37         echo "  -d, --dry-run     Test run only, don't copy any data."
  38         echo
  39         echo "When no <system> is given, all defined systems are used."
  40         echo
  41         exit 1
  42 }
  43
  44 Log() {
  45         logger -t "$NAME" "$*"
  46 }
  47
  48 Message() {
  49         echo "$*"
  50 }
  51
  52 MessageLog() {
  53         Log "$*"
  54         Message "$*"
  55 }
  56
  57 CleanUp() {
  58         if [ -n "$post_exec" ]; then
  59                 echo "Executing \"$post_exec\" ..."
  60                 sh -c $post_exec
  61                 if [ $? -ne 0 ]; then
  62                         echo "Warning: post-exec command failed!"
  63                 fi
  64                 echo
  65         fi
  66         rm -f "$PIDFILE"
  67 }
  68
  69 GotSignal() {
  70         echo
  71         echo "--> Got break signal, cleaning up & aborting ..."
  72         echo
  73         CleanUp
  74         echo -n "Aborted: "; date
  75         echo
  76         exit 9
  77 }
  78
  79 while [ $# -gt 0 ]; do
  80         case "$1" in
  81           "-n"|"--dry-run")
  82                 DRYRUN=1; shift
  83                 ;;
  84           "-p"|"--progress")
  85                 VERBOSE=1; shift
  86                 ;;
  87           "-"*)
  88                 Usage
  89                 ;;
  90           *)
  91                 break
  92         esac
  93 done
  94
  95 if [ $# -ge 1 ]; then
  96         for s in $@; do
  97                 if [ ! -r "${CONF_D}/$s" ]; then
  98                         echo "$NAME: Can' read \"${CONF_D}/$s\"!"
  99                         exit 1
 100                 fi
 101                 sys="$sys ${CONF_D}/$s"
 102         done
 103 else
 104         sys=${CONF_D}/*
 105 fi
 106
 107 trap GotSignal SIGINT
 108
 109 Log "Started ..."
 110
 111 echo -n "Started: "; date
 112 echo
 113
 114 [ -r "${CONF_D}/backup-script.conf" ] && source "${CONF_D}/backup-script.conf"
 115
 116 # check and create PID file
 117 if [ -e "$PIDFILE" ]; then
 118         Log "Lockfile \"$PIDFILE\" already exists. Aborting!"
 119         echo "Lockfile \"$PIDFILE\" already exists."
 120         echo "Is an other instance still running?"
 121         echo
 122         echo -n "Aborted: "; date
 123         echo
 124         exit 3
 125 fi
 126 touch "$PIDFILE" 2>/dev/null
 127 if [ $? -ne 0 ]; then
 128         echo "Warning: can't create PID file \"$PIDFILE\"!"
 129         echo
 130 else
 131         echo "$$" >>"$PIDFILE"
 132 fi
 133
 134 if [ -n "$pre_exec" ]; then
 135         echo "Executing \"$pre_exec\" ..."
 136         sh -c $pre_exec
 137         if [ $? -ne 0 ]; then
 138                 echo "Error: pre-exec command failed!"; echo
 139                 CleanUp
 140                 echo "Aborting backup."; echo
 141                 exit 2
 142         fi
 143         sleep 2
 144         echo
 145 fi
 146
 147 for f in $sys; do
 148         [ -r "$f" -a -f "$f" ] || continue
 149
 150         system=`basename $f`
 151         user="$default_user"
 152         target="$default_target"
 153         ssh_args_add=""
 154         rsync_args_add=""
 155         compress=1
 156         ping=1
 157         local=0
 158
 159         case "$system" in
 160                 "backup-script.conf"|*.sh)
 161                         continue
 162                         ;;
 163         esac
 164
 165         # Read in configuration file
 166         source "$f"
 167
 168         [ "$local" -eq 0 ] \
 169                 && MessageLog "Working on \"$system\" ..." \
 170                 || MessageLog "Working on \"$system\" (local system) ..."
 171
 172         count_all=$count_all+1
 173
 174         # Check target directory
 175         if [ -z "$target" ]; then
 176                 MessageLog "No target directory specified for \"$system\"!? Skipped!"
 177                 echo; continue
 178         fi
 179         if [ ! -d "$target" ]; then
 180                 MessageLog "Target \"$target\" is not a directory!? \"$system\" skipped!"
 181                 echo; continue
 182         fi
 183
 184         destdir="$target"
 185         target="$target/$system"
 186         [ "$DRYRUN" -gt 1 ] || mkdir -p "$target"
 187
 188         if [ "$local" -eq 0 -a "$ping" -ne 0 ]; then
 189                 # Check if system is alive
 190                 ping -c 1 "$system" >/dev/null 2>&1
 191                 if [ $? -ne 0 ]; then
 192                         MessageLog "Host \"$system\" seems not to be alive!? Skipped."
 193                         echo; continue
 194                 fi
 195                 Message "OK, host \"$system\" seems to be alive."
 196         fi
 197
 198         ssh_cmd="ssh"
 199         [ -n "$ssh_args_add" ] && ssh_cmd="$ssh_cmd $ssh_args_add"
 200
 201         cmd="rsync --archive"
 202         [ "$compress" -ne 0 ] && cmd="$cmd --compress"
 203         cmd="$cmd --rsh=\"$ssh_cmd\" --delete --delete-excluded --sparse"
 204         [ "$VERBOSE" -gt 0 ] && cmd="$cmd --progress"
 205         cmd="$cmd --exclude=/BACKUP --exclude=/backup --exclude=/mnt"
 206         cmd="$cmd --exclude=/dev --exclude=/proc --exclude=/sys"
 207         cmd="$cmd --exclude=/usr/src --exclude=/usr/local/src"
 208         cmd="$cmd --exclude=/var/cache/apt --exclude=/var/amavis/blocked"
 209         cmd="$cmd --exclude=/var/log --exclude=/tmp --exclude=/var/tmp"
 210         [ -n "$rsync_args_add" ] && cmd="$cmd $rsync_args_add"
 211
 212         [ "$local" -eq 0 ] \
 213                 && cmd="$cmd ${user}@${system}:/ $target" \
 214                 || cmd="$cmd / $target"
 215
 216         Message "Calling: $cmd"
 217         echo -n "Start date: "; date
 218         count_started=$count_started+1
 219         rm -f "$target/.stamp"
 220
 221         if [ "$DRYRUN" -lt 1 ]; then
 222                 $SHELL -c "$cmd"; ret=$?
 223                 echo "code=$ret" >"$target/.stamp"
 224         else
 225                 MessageLog " *** Trial run, not executing synchronization command!"
 226                 ret=0
 227         fi
 228
 229         if [ $ret -eq 20 ]; then
 230                 MessageLog "Backup of \"$system\" interrupted. Aborting ..."
 231                 CleanUp
 232                 exit 1
 233         fi
 234
 235         if [ $ret -eq 0 -o $ret -eq 24 ]; then
 236                 [ $ret -eq 24 ] && count_ok_vanished=$count_ok_vanished+1
 237
 238                 MessageLog "System \"$system\" completed with status $ret, OK."
 239                 [ "$DRYRUN" -gt 0 ] || count_ok=$count_ok+1
 240         else
 241                 MessageLog "System \"$system\" completed with ERRORS, code $ret!"
 242         fi
 243         echo -n "End date: "; date
 244
 245         destinations="$destinations $destdir"
 246         echo
 247 done
 248
 249 sync
 250
 251 Log "Done: $count_all jobs, $count_started started, $count_ok completed without errors."
 252
 253 paths=$( echo $destinations | sed -e 's/ /\n/g' | sort | uniq )
 254 if [ -n "$paths" ]; then
 255         df -h $paths
 256         echo
 257 fi
 258
 259 CleanUp
 260
 261 echo -n "Done: "; date
 262 echo
 263 echo " - $count_all jobs defined,"
 264 echo " - $count_started jobs started,"
 265 echo " - $count_ok done without errors."
 266 echo
 267
 268 if [ $count_started -ne $count_ok ]; then
 269         echo "----->  THERE HAVE BEEN ERRORS!  <-----"
 270         echo
 271 fi
 272
 273 # -eof-