3 # backup-script system for cloning systems using rsync
4 # Copyright (c)2008-2015 Alexander Barton <alex@barton.de>
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.
14 PIDFILE="/var/run/$NAME.pid"
21 declare -i count_all=0
22 declare -i count_started=0
24 declare -i count_ok_vanished=0
28 # Default settings, can be overwritten in backup-script.conf:
29 conf_d="/etc/backup-script.d"
32 default_source_root="/"
35 default_ssh_args_add=""
36 default_rsync_args_add=""
37 default_exclude_args_add=""
42 default_job_pre_exec=""
43 default_job_post_exec=""
46 echo "Usage: $NAME [<options>] [<system> [<system> [...]]]"
48 echo " -p, --progress Show progress, see rsync(1)."
49 echo " -n, --dry-run Test run only, don't copy any data."
51 echo "When no <system> is given, all defined systems are used."
57 if [ -n "$post_exec" ]; then
58 echo "Executing \"$post_exec\" ..."
61 echo "Warning: post-exec command failed!"
70 echo "--> Got break signal, cleaning up & aborting ..."
73 echo -n "Aborted: "; date
82 echo "Running job ${what}-exec command ..."
84 && cmd="$ssh_cmd ${user}@${system} $cmd"
85 echo -n "Start date (${what}-exec): "; date
87 if [ "$DRYRUN" -eq 0 ]; then
88 $SHELL -c "$cmd"; local ret=$?
90 echo " *** Trial run, not executing ${what}-exec command!"
94 && echo "The ${what}-exec command completed with status 0, OK." \
95 || echo "The ${what}-exec command completed with ERRORS, code $ret!"
102 while [ -n "$dir" ]; do
103 findmnt -fn -o FSTYPE --raw "$dir" 2>/dev/null; local r=$?
104 if [ $r -eq 0 ]; then
106 elif [ $r -eq 127 ]; then
110 dir=$(dirname "$dir") || return 1
119 dir=$(dirname "$volume")
123 btrfs subvolume create "$volume" >/dev/null || return 1
126 echo "CreateSubvolume: Incompatible FS type \"$fs\" on \"$dir\"!"
139 dir=$(dirname "source")
140 fs=$(GetFS "$source")
143 btrfs subvolume snapshot "$source" "$snapshot" >/dev/null || return 1
146 echo "CloneSubvolume: Incompatible FS type \"$fs\" on \"$source\"!"
157 fs=$(GetFS "$source")
160 mv "$source" "$target" || return 1
163 echo "RenameSubvolume: Incompatible FS type \"$fs\" on \"$source\"!"
173 fs=$(GetFS "$volume")
176 btrfs subvolume delete "$volume" >/dev/null || return 1
179 echo "DeleteSubvolume: Incompatible FS type \"$fs\" on \"$volume\"!"
185 Initialize_Last_SysTarget_Snapshot() {
190 fs=$(GetFS "$sys_target")
193 # Search directory of last generation, if any
194 last=$(ls -1d "$sys_target"/[0-9]* 2>/dev/null | sort -r | head -n1)
195 if [ -n "$last" ]; then
196 if [ ! -d "$last" ]; then
197 echo "Last snapshot \"$last\" seems not to be a directory!? \"$system\" skipped!"
202 sys_target="$sys_target/$(date +%Y%m%d-%H%M%S)"
203 snapshot="$sys_target"
206 echo "Initialize_Last_SysTarget_Snapshot: Incompatible FS type \"$fs\" on \"$sys_target\"!"
212 while [ $# -gt 0 ]; do
228 trap GotSignal SIGINT
230 echo -n "Started: "; date
232 for conf in "/etc/backup-script.conf" "${conf_d}/backup-script.conf"; do
233 if [ -r "$conf" ]; then
234 echo "Reading configuration: \"$conf\" ..."
240 if [ $# -ge 1 ]; then
242 if [ ! -r "${conf_d}/$s" ]; then
243 echo "$NAME: Can' read \"${conf_d}/$s\"!"
246 sys="$sys ${conf_d}/$s"
252 # check and create PID file
253 if [ -e "$PIDFILE" ]; then
254 echo "Lockfile \"$PIDFILE\" already exists."
255 echo "Is an other instance still running?"
257 echo -n "Aborted: "; date
261 touch "$PIDFILE" 2>/dev/null
262 if [ $? -ne 0 ]; then
263 echo "Warning: can't create PID file \"$PIDFILE\"!"
266 echo "$$" >>"$PIDFILE"
269 if [ -n "$pre_exec" ]; then
270 echo "Executing \"$pre_exec\" ..."
272 if [ $? -ne 0 ]; then
273 echo "Error: pre-exec command failed!"; echo
275 echo "Aborting backup."; echo
283 [ -r "$f" -a -f "$f" ] || continue
285 fname=$(basename "$f")
287 "backup-script.conf"|*.sh)
292 # Set global defaults
295 source_root="$default_source_root"
296 target="$default_target"
297 ssh_args_add="$default_ssh_args_add"
298 rsync_args_add="$default_rsync_args_add"
299 exclude_args_add="$default_exclude_args_add"
300 compress="$default_compress"
302 local="$default_local"
303 generations="$default_generations"
304 job_pre_exec="$default_job_pre_exec"
305 job_post_exec="$default_job_post_exec"
307 # Compatibility with backup-pull(1) script: Save global values ...
308 pre_exec_saved="$pre_exec"
309 post_exec_saved="$post_exec"
311 # Compatibility with backup-pull(1) script: Set defaults
317 # Read in system configuration file
320 # Compatibility with backup-pull(1) script: Fix up configuration
321 [ "$system" = "$fname" -a -n "$host" ] \
323 [ "$source_root" = "$default_source_root" -a -n "$source" ] \
324 && source_root="$source"
325 [ -z "$job_pre_exec" -a -n "$pre_exec" ] \
326 && job_pre_exec="$pre_exec"
327 [ -z "$job_post_exec" -a -n "$post_exec" ] \
328 && job_post_exec="$post_exec"
330 # Compatibility with backup-pull(1) script: Restore global values ...
331 pre_exec="$pre_exec_saved"
332 post_exec="$post_exec_saved"
334 # Validate configuration
335 [ "$system" = "localhost" -o "$system" = "127.0.0.1" ] && local=1
337 [ "$system" = "$fname" ] \
338 && systxt="\"$system\"" \
339 || systxt="\"$fname\" [\"$system\"]"
341 && echo "Working on $systxt ..." \
342 || echo "Working on $systxt (local system) ..."
344 count_all=$count_all+1
346 # Check target directory
347 if [ -z "$target" ]; then
348 echo "No target directory specified for \"$system\"!? Skipped!"
351 if [ ! -d "$target" ]; then
352 echo "Target \"$target\" is not a directory!? \"$system\" skipped!"
356 sys_target="$target/$fname"
357 sys_root="$sys_target"
358 if [ "$DRYRUN" -eq 0 -a ! -e "$sys_target" ]; then
359 if [ $generations -gt 0 ]; then
360 CreateSubvolume "$sys_target"
362 mkdir -p "$sys_target"
364 if [ $? -ne 0 ]; then
365 echo "Can't create \"$sys_target\"!? \"$system\" skipped!"
370 if [ "$local" -eq 0 -a "$ping" -ne 0 ]; then
371 # Check if system is alive
372 ping -c 1 "$system" >/dev/null 2>&1
373 if [ $? -ne 0 ]; then
374 echo "Host \"$system\" seems not to be alive!? Skipped."
377 echo "OK, host \"$system\" seems to be alive."
380 if [ $generations -gt 0 ]; then
381 # Make sure no old backup is stored in system directory
382 if [ -e "$sys_target/.stamp" ]; then
383 # There seems to be a genearation-less backup in the
385 echo "Target directory \"$sys_target\" seems to be unclean!? \"$system\" skipped!"
389 Initialize_Last_SysTarget_Snapshot "$sys_target" || continue
391 if [ -n "$last" -a ! -e "$last/.stamp" ]; then
392 # Old backup directory without "stamp file", continue
393 echo "Found incomplete snapshot in \"$last\", reusing and renaming it ..."
394 RenameSubvolume "$last" "$sys_target"
395 if [ $? -ne 0 ]; then
396 echo "Failed to rename last snapshot \"$last\" to \"$sys_target\"!? \"$system\" skipped!"
399 elif [ -n "$last" ]; then
400 # Old backup directory found, create new snapshot
401 echo "Found last snapshot in \"$last\"."
402 if [ "$DRYRUN" -eq 0 ]; then
403 CloneSubvolume "$last" "$sys_target" "$snapshot"; r=$?
404 if [ $r -ne 0 ]; then
405 echo "Can't create snapshot \"$snapshot\" of \"$last\", code $r!? \"$system\" skipped!"
408 echo "Created new snapshot in \"$snapshot\"."
410 echo " *** Trial run, not creating new snapshot in \"$sys_target\"!"
413 # No old backup found, create new subvolume
414 if [ "$DRYRUN" -eq 0 ]; then
415 CreateSubvolume "$sys_target"; r=$?
416 if [ $r -ne 0 ]; then
417 echo "Can't create subvolume \"$sys_target\", code $r!? \"$system\" skipped!"
420 echo "Created new subvolume in \"$sys_target\"."
422 echo " *** Trial run, not creating new subvolume \"$sys_target\"!"
428 [ -n "$ssh_args_add" ] && ssh_cmd="$ssh_cmd $ssh_args_add"
430 # execute job "pre-exec" command, if any
431 if [ -n "$job_pre_exec" ]; then
432 ExecJob pre "$job_pre_exec" ; ret=$?
433 if [ $ret -ne 0 ]; then
434 [ $ret -ne 99 ] && count_started=$count_started+1
435 echo "Pre-exec command failed, \"$system\" skipped!"
440 # prepare (remote) command ...
441 cmd="rsync --archive"
442 [ "$compress" -ne 0 ] && cmd="$cmd --compress"
443 [ "$local" -eq 0 ] && cmd="$cmd --rsh=\"$ssh_cmd\""
444 cmd="$cmd --delete --delete-excluded --sparse"
445 [ "$VERBOSE" -gt 0 ] && cmd="$cmd --progress"
446 if [ "$source_root" = "$default_source_root" ]; then
447 cmd="$cmd --exclude=/dev --exclude=/proc --exclude=/sys"
448 cmd="$cmd --exclude=/run --exclude=/tmp --exclude=/var/tmp"
449 cmd="$cmd --exclude=/media --exclude=/mnt --exclude=/net"
450 cmd="$cmd --exclude=/var/cache/apt --exclude=/var/log"
452 [ -n "$exclude_args_add" ] && cmd="$cmd $exclude_args_add"
453 [ -n "$rsync_args_add" ] && cmd="$cmd $rsync_args_add"
456 && cmd="$cmd ${user}@${system}:$source_root $sys_target/" \
457 || cmd="$cmd $source_root $sys_target/"
459 echo "Backing up to \"$sys_target\" ..."
460 echo -n "Start date: "; date
462 count_started=$count_started+1
465 if [ "$DRYRUN" -eq 0 ]; then
466 rm -f "$sys_target/.stamp"
467 $SHELL -c "$cmd"; ret=$?
468 echo "code=$ret" >"$sys_target/.stamp"
470 echo " *** Trial run, not executing synchronization command!"
474 if [ $ret -eq 20 ]; then
475 echo "Backup of \"$system\" interrupted. Aborting ..."
480 echo -n "End date: "; date
481 if [ $ret -eq 0 -o $ret -eq 24 ]; then
482 [ $ret -eq 24 ] && count_ok_vanished=$count_ok_vanished+1
484 echo "System \"$system\" completed with status $ret, OK."
485 [ "$DRYRUN" -gt 0 ] || count_ok=$count_ok+1
488 echo "System \"$system\" completed with ERRORS, code $ret!"
491 # execute job "post-exec" command, if any
492 if [ -n "$job_post_exec" ]; then
493 ExecJob post "$job_post_exec"
496 if [ $generations -gt 0 ]; then
497 # Update "latest" symlink
498 if [ "$DRYRUN" -eq 0 ]; then
499 rm -f "$sys_root/latest"
500 ln -s "$sys_target" "$sys_root/latest"
502 # Clean up old generations
503 declare -i gen_count=$generations+2
504 to_delete=$(ls -1t "$sys_root" 2>/dev/null | tail -n+$gen_count | sort)
505 if [ -n "$to_delete" -a $ok -eq 1 ]; then
506 [ "$DRYRUN" -eq 0 ] \
507 && echo "Deleting old backup generations (keep $generations) ..." \
508 || echo " *** Trial run, not deleting old generations:"
509 for delete in $to_delete; do
510 dir="$sys_root/$delete"
511 if [ ! -e "$dir/.stamp" ]; then
512 echo "Not deleting \"$dir\", not a backup directory!?"
515 last=$(stat "$dir/.stamp" 2>/dev/null | grep "^Modify: " \
516 | cut -d':' -f2- | cut -d. -f1)
517 echo "Removing backup from" $last "..."
518 if [ "$DRYRUN" -eq 0 ]; then
519 DeleteSubvolume "$dir"
521 echo "Failed to delete \"$dir\"!"
524 echo -n "Clean up finished: "; date
525 elif [ -n "$to_delete" ]; then
526 echo "There have been errors, not cleaning up old generations!"
528 echo "Nothing to clean up."
532 destinations="$destinations $target"
538 paths=$( echo $destinations | sed -e 's/ /\n/g' | sort | uniq )
539 if [ "$DRYRUN" -eq 0 -a -n "$paths" ]; then
546 echo -n "Done: "; date
548 [ $count_all -eq 1 ] && s="" || s="s"
549 echo " - $count_all job$s defined,"
550 [ $count_started -eq 1 ] && s="" || s="s"
551 echo " - $count_started job$s started,"
552 echo " - $count_ok done without errors."
555 if [ $count_started -ne $count_ok ]; then
556 echo "-----> THERE HAVE BEEN ERRORS! <-----"