#!/bin/bash
#
# backup-script system for cloning systems using rsync
-# Copyright (c)2008-2011 Alexander Barton, alex@barton.de
+# Copyright (c)2008-2013 Alexander Barton, alex@barton.de
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
NAME=`basename $0`
CONF_D="/etc/backup-script.d"
-VERBOSE=0
PIDFILE="/var/run/$NAME.pid"
+DRYRUN=0
+VERBOSE=0
+
export LC_ALL=C
declare -i count_all=0
declare -i count_ok_vanished=0
destinations=""
+
+# Default settings, can be overwritten in backup-script.conf:
pre_exec=""
post_exec=""
default_target=""
default_user="root"
-
-if [ "$1" == "-p" ]; then
- VERBOSE=1
- shift
-fi
-
-case "$1" in
- "-"*)
- echo "Usage: $NAME [-p] [<system> [<system> [...]]]"
+default_ssh_args_add=""
+default_rsync_args_add=""
+default_exclude_args_add=""
+default_compress=1
+default_ping=1
+default_local=0
+default_generations=0
+
+Usage() {
+ echo "Usage: $NAME [<options>] [<system> [<system> [...]]]"
+ echo
+ echo " -p, --progress Show progress, see rsync(1)."
+ echo " -n, --dry-run Test run only, don't copy any data."
+ echo
+ echo "When no <system> is given, all defined systems are used."
+ echo
exit 1
- ;;
-esac
-
-Log() {
- logger -t "$NAME" "$*"
-}
-
-Message() {
- echo "$*"
-}
-
-MessageLog() {
- Log "$*"
- Message "$*"
}
CleanUp() {
exit 9
}
+while [ $# -gt 0 ]; do
+ case "$1" in
+ "-n"|"--dry-run")
+ DRYRUN=1; shift
+ ;;
+ "-p"|"--progress")
+ VERBOSE=1; shift
+ ;;
+ "-"*)
+ Usage
+ ;;
+ *)
+ break
+ esac
+done
+
if [ $# -ge 1 ]; then
for s in $@; do
if [ ! -r "${CONF_D}/$s" ]; then
trap GotSignal SIGINT
-Log "Started ..."
-
echo -n "Started: "; date
echo
# check and create PID file
if [ -e "$PIDFILE" ]; then
- Log "Lockfile \"$PIDFILE\" already exists. Aborting!"
echo "Lockfile \"$PIDFILE\" already exists."
echo "Is an other instance still running?"
echo
for f in $sys; do
[ -r "$f" -a -f "$f" ] || continue
- system=`basename $f`
- user="$default_user"
- target="$default_target"
- ssh_args_add=""
- rsync_args_add=""
- compress=1
- ping=1
- local=0
-
- case "$system" in
+ fname=`basename $f`
+ case "$fname" in
"backup-script.conf"|*.sh)
continue
;;
esac
- # Read in configuration file
+ # Set global defaults
+ system="$fname"
+ user="$default_user"
+ target="$default_target"
+ ssh_args_add="$default_ssh_args_add"
+ rsync_args_add="$default_rsync_args_add"
+ exclude_args_add="$default_exclude_args_add"
+ compress="$default_compress"
+ ping="$default_ping"
+ local="$default_local"
+ generations="$default_generations"
+
+ # Read in system configuration file
source "$f"
+ # Validate configuration
+ [ "$system" = "localhost" -o "$system" = "127.0.0.1" ] && local=1
+
+ [ "$system" = "$fname" ] \
+ && systxt="\"$system\"" \
+ || systxt="\"$fname\" [\"$system\"]"
[ "$local" -eq 0 ] \
- && MessageLog "Working on \"$system\" ..." \
- || MessageLog "Working on \"$system\" (local system) ..."
+ && echo "Working on $systxt ..." \
+ || echo "Working on $sytxts (local system) ..."
count_all=$count_all+1
# Check target directory
if [ -z "$target" ]; then
- MessageLog "No target directory specified for \"$system\"!? Skipped."
+ echo "No target directory specified for \"$system\"!? Skipped!"
echo; continue
fi
if [ ! -d "$target" ]; then
- MessageLog "Target \"$target\" is not a directory!? \"$system\" skipped."
+ echo "Target \"$target\" is not a directory!? \"$system\" skipped!"
echo; continue
fi
- destdir="$target"
- target="$target/$system"
- mkdir -p "$target"
+ sys_target="$target/$fname"
+ if [ "$DRYRUN" -eq 0 ]; then
+ mkdir -p "$sys_target" >/dev/null 2>&1
+ if [ $? -ne 0 ]; then
+ echo "Can't create \"$sys_target\"!? \"$system\" skipped!"
+ echo continue
+ fi
+ fi
if [ "$local" -eq 0 -a "$ping" -ne 0 ]; then
# Check if system is alive
ping -c 1 "$system" >/dev/null 2>&1
if [ $? -ne 0 ]; then
- MessageLog "Host \"$system\" seems not to be alive!? Skipped."
+ echo "Host \"$system\" seems not to be alive!? Skipped."
+ echo; continue
+ fi
+ echo "OK, host \"$system\" seems to be alive."
+ fi
+
+ if [ $generations -gt 0 ]; then
+ # Make sure no old backup is stored in system directory
+ if [ -e "$sys_target/.stamp" ]; then
+ # There seems to be a genearation-less backup in the
+ # target directory!
+ echo "Target directory \"$sys_target\" seems to be unclean!? \"$system\" skipped!"
echo; continue
fi
- Message "OK, host \"$system\" seems to be alive."
+
+ # Search directory of last generation, if any
+ last="`ls -1 "$sys_target" 2>/dev/null | sort -r | head -n1`"
+ if [ -n "$last" ]; then
+ last="$sys_target/$last"
+ if [ ! -d "$last" ]; then
+ echo "Last snapshot \"$last\" seems not to be a directory!? \"$system\" skipped!"
+ echo; continue
+ fi
+ fi
+ sys_target="$sys_target/`date +%Y%m%d-%H%M%S`"
+
+ if [ -n "$last" -a ! -e "$last/.stamp" ]; then
+ # Old backup directory without "stamp file", continue
+ echo "Found incomplete snapshot in \"$last\", reusing and renaming it ..."
+ mv "$last" "$sys_target" >/dev/null 2>&1
+ if [ $? -ne 0 ]; then
+ echo "Failed to rename last snapshot \"$last\" to \"$sys_target\"!? \"$system\" skipped!"
+ echo; continue
+ fi
+ elif [ -n "$last" ]; then
+ # Old backup directory found, create new snapshot
+ echo "Found last snapshot in \"$last\"."
+ if [ "$DRYRUN" -eq 0 ]; then
+ btrfs subvolume snapshot \
+ "$last" "$sys_target" >/dev/null 2>&1; r=$?
+ if [ $r -ne 0 ]; then
+ echo "Can't create btrfs snapshot \"$sys_target\" of \"$last\", code $r!? \"$system\" skipped!"
+ echo; continue
+ fi
+ echo "Created new snapshot in \"$sys_target\"."
+ else
+ echo " *** Trial run, not creating new snapshot in \"$sys_target\"!"
+ fi
+ else
+ # No old backup found, create new subvolume
+ if [ "$DRYRUN" -eq 0 ]; then
+ btrfs subvolume create \
+ "$sys_target" >/dev/null 2>&1; r=$?
+ if [ $r -ne 0 ]; then
+ echo "Can't create btrfs subvolume \"$sys_target\", code $r!? \"$system\" skipped!"
+ echo; continue
+ fi
+ echo "Created new subvolume in \"$sys_target\"."
+ else
+ echo " *** Trial run, not creating new subvolume \"$sys_target\"!"
+ fi
+ fi
fi
ssh_cmd="ssh"
[ "$compress" -ne 0 ] && cmd="$cmd --compress"
cmd="$cmd --rsh=\"$ssh_cmd\" --delete --delete-excluded --sparse"
[ "$VERBOSE" -gt 0 ] && cmd="$cmd --progress"
- cmd="$cmd --exclude=/BACKUP --exclude=/backup --exclude=/mnt"
cmd="$cmd --exclude=/dev --exclude=/proc --exclude=/sys"
- cmd="$cmd --exclude=/usr/src --exclude=/usr/local/src"
- cmd="$cmd --exclude=/var/cache/apt --exclude=/var/amavis/blocked"
- cmd="$cmd --exclude=/var/log --exclude=/tmp --exclude=/var/tmp"
+ cmd="$cmd --exclude=/run --exclude=/tmp --exclude=/var/tmp"
+ cmd="$cmd --exclude=/media --exclude=/mnt --exclude=/net"
+ cmd="$cmd --exclude=/var/cache/apt --exclude=/var/log"
+ [ -n "$exclude_args_add" ] && cmd="$cmd $exclude_args_add"
[ -n "$rsync_args_add" ] && cmd="$cmd $rsync_args_add"
[ "$local" -eq 0 ] \
- && cmd="$cmd ${user}@${system}:/ $target" \
- || cmd="$cmd / $target"
+ && cmd="$cmd ${user}@${system}:/ $sys_target/" \
+ || cmd="$cmd / $sys_target/"
- Message "Calling: $cmd"
+ echo "Backing up to \"$sys_target\" ..."
echo -n "Start date: "; date
+ echo "$cmd"
count_started=$count_started+1
- rm -f "$target/.stamp"
- $SHELL -c "$cmd"; ret=$?
- echo "code=$ret" >"$target/.stamp"
+ if [ "$DRYRUN" -eq 0 ]; then
+ rm -f "$sys_target/.stamp"
+ $SHELL -c "$cmd"; ret=$?
+ echo "code=$ret" >"$sys_target/.stamp"
+ else
+ echo " *** Trial run, not executing synchronization command!"
+ ret=0
+ fi
if [ $ret -eq 20 ]; then
- MessageLog "Backup of \"$system\" interrupted. Aborting ..."
+ echo "Backup of \"$system\" interrupted. Aborting ..."
CleanUp
exit 1
fi
+ echo -n "End date: "; date
if [ $ret -eq 0 -o $ret -eq 24 ]; then
[ $ret -eq 24 ] && count_ok_vanished=$count_ok_vanished+1
- MessageLog "System \"$system\" completed with status $ret, OK."
- count_ok=$count_ok+1
+ echo "System \"$system\" completed with status $ret, OK."
+ [ "$DRYRUN" -gt 0 ] || count_ok=$count_ok+1
else
- MessageLog "System \"$system\" completed with ERRORS, code $ret!"
+ echo "System \"$system\" completed with ERRORS, code $ret!"
fi
- echo -n "End date: "; date
- destinations="$destinations $destdir"
+ destinations="$destinations $target"
echo
done
sync
-Log "Done: $count_all jobs, $count_started started, $count_ok completed without errors."
-
paths=$( echo $destinations | sed -e 's/ /\n/g' | sort | uniq )
-if [ -n "$paths" ]; then
+if [ "$DRYRUN" -eq 0 -a -n "$paths" ]; then
df -h $paths
echo
fi
echo -n "Done: "; date
echo
-echo " - $count_all jobs defined,"
-echo " - $count_started jobs started,"
+[ $count_all -eq 1 ] && s="" || s="s"
+echo " - $count_all job$s defined,"
+[ $count_started -eq 1 ] && s="" || s="s"
+echo " - $count_started job$s started,"
echo " - $count_ok done without errors."
echo
projects / backup-script.git / blobdiff