mirror of
https://0xacab.org/liberate/backupninja.git
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351 lines
8.2 KiB
Plaintext
351 lines
8.2 KiB
Plaintext
#
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# backupninja handler to do incremental backups using
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# rsync and hardlinks, based on
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#
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# http://www.mikerubel.org/computers/rsync_snapshots/
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#
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# feedback: rhatto at riseup.net | gpl
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# lot of enhancements grabbed from "rsnap" handler by paulv at bikkel.org
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#
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# Config file options
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# -------------------
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#
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# [general]
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# log = rsync log file
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# partition = partition where the backup lives
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# fscheck = set to 1 if fsck should run on $partition after the backup is made
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# read_only = set to 1 if $partition is mounted read-only
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# mountpoint = backup partition mountpoint or backup main folder
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# backupdir = folder relative do $mountpoint where the backup should be stored
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# days = number of backup increments (min = 5)
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# lockfile = lockfile to be kept during backup execution
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# nicelevel = rsync command nice level
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# enable_mv_timestamp_bug = set to "yes" if your system isnt handling timestamps correctly
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# tmp = temp folder
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#
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# [source]
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# from = local or remote
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# host = source hostname or ip, if remote backup
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# testconnect = when "yes", test the connection for a remote source before backup
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# include = include folder on backup
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# exclude = exclude folder on backup
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# ssh = ssh command line (remote only)
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# rsync = rsync program
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# rsync_options = rsync command options
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# exclude_vserver = vserver-name (valid only if vservers = yes on backupninja.conf)
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# numericids = when set to 1, use numeric ids instead of user/group mappings on rsync
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# compress = if set to 1, compress data on rsync (remote source only)
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# bandwidthlimit = set a badnwidth limit in kbps (remote source only)
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# remote_rsync = remote rsync program (remote source only)
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#
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# [services]
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# initscripts = absolute path where scripts are located
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# service = script name to be stoped at the begining of the backup and started at its end
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#
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# You can also specify some system comands if you don't want the default system values:
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#
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# [system]
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# rm = rm command
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# cp = cp command
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# touch = touch command
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# mv = mv command
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# fsck = fsck command
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#
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# You dont need to manually specify vservers using "include = /vservers".
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# They are automatically backuped if vserver is set to "yes" on you backupninja.conf.
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#
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# config file evaluation
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setsection system
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getconf rm rm
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getconf cp cp
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getconf touch touch
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getconf mv mv
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getconf fsck fsck
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setsection general
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getconf log /var/log/backup/rsync.log
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getconf partition
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getconf fscheck
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getconf read_only
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getconf mountpoint
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getconf backupdir
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getconf rotate
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getconf days
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getconf lockfile
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getconf nicelevel 0
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getconf enable_mv_timestamp_bug no
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getconf tmp /tmp
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setsection source
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getconf from local
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getconf testconnect no
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getconf rsync $RSYNC
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getconf rsync_options "-av --delete"
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getconf ssh ssh
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getconf user
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getconf host
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getconf include
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getconf exclude
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getconf exclude_vserver
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getconf numericids 0
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getconf compress 0
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getconf bandwidthlimit
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getconf remote_rsync rsync
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setsection services
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getconf initscripts
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getconf service
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# function definitions
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function rotate {
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if [[ "$2" < 4 ]]; then
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error "Rotate: minimum of 4 rotations"
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exit 1
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fi
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if [ -d $1.$2 ]; then
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$nice $mv /$1.$2 /$1.tmp
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fi
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for ((n=`echo "$2 - 1" | bc`; n >= 0; n--)); do
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if [ -d $1.$n ]; then
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dest=`echo "$n + 1" | bc`
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$nice $mv /$1.$n /$1.$dest
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$touch /$1.$dest
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fi
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done
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if [ -d $1.tmp ]; then
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$nice $mv /$1.tmp /$1.0
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fi
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if [ -d $1.1 ]; then
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$nice $cp -alf /$1.1/. /$1.0
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fi
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}
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function move_files {
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ref=$tmp/makesnapshot-mymv-$$;
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$touch -r $1 $ref;
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$mv $1 $2;
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$touch -r $ref $2;
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$rm $ref;
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}
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backupdir="$mountpoint/$backupdir"
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# does $backupdir exists?
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if [ ! -d "$backupdir" ]; then
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error "Backupdir $backupdir does not exist"
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exit 1
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fi
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# setup number of increments
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if [ -z "$days" ]; then
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keep="4"
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else
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keep="`echo $days - 1 | bc -l`"
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fi
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# lockfile setup
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if [ ! -z "$lockfile" ]; then
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$touch $lockfile || warning "Could not create lockfile $lockfile"
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fi
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# nicelevel setup
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if [ ! -z "$nicelevel" ]; then
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nice="nice -n $nicelevel"
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else
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nice=""
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fi
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# connection test
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if [ "$from" == "remote" ] && [ "$testconnect" == "yes" ]; then
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debug "$ssh -o PasswordAuthentication=no $user@$host 'echo -n 1'"
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result=`ssh -o PasswordAuthentication=no $user@$host 'echo -n 1'`
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if [ "$result" != "1" ]; then
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fatal "Can't connect to $host as $user."
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else
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debug "Connected to $srchost successfully"
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fi
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fi
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# rsync options for local sources
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if [ "$from" == "local" ]; then
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rsync_local_options="$rsync_options"
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if [ ! -z "$numericids" ]; then
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rsync_local_options="$rsync_local_options --numeric-ids "
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fi
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fi
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# rsync options for remote sources
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if [ "$from" == "remote" ]; then
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rsync_remote_options="$rsync_options --rsync-path=$remote_rsync"
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if [ "$compress" == "1" ]; then
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rsync_remote_options="$rsync_remote_options --compress"
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fi
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if [ ! -z "$bandwidthlimit" ]; then
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rsync_remote_options="$rsync_remote_options --bwlimit=$bandwidthlimit"
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fi
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if [ ! -z "$numericids" ]; then
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rsync_remote_options="$rsync_remote_options --numeric-ids"
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fi
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fi
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# set mv procedure
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if [ $enable_mv_timestamp_bug == "yes" ]; then
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mv=move_files
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fi
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# set excludes
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for path in $exclude; do
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EXCLUDES="$EXCLUDES --exclude=$path"
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done
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# stop services
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if [ ! -z "$service" ]; then
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for daemon in $service; do
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info "Stopping service $daemon..."
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$initscripts/$daemon stop
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done
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fi
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echo "Starting backup at `date`" >> $log
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# mount backup destination folder as read-write
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if [ "$read_only" == "1" ] || [ "$read_only" == "yes" ]; then
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if [ -d "$mountpoint" ]; then
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mount -o remount,rw $mountpoint
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if (($?)); then
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error "Could not mount $mountpoint"
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exit 1
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fi
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fi
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fi
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# add vservers to included folders
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if [ "$vservers_are_available" == "yes" ]; then
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# sane permission on backup
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mkdir -p $backupdir/$VROOTDIR
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chmod 000 $backupdir/$VROOTDIR
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for candidate in $found_vservers; do
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candidate="`basename $candidate`"
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found_excluded_vserver="0"
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for excluded_vserver in $exclude_vserver; do
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if [ "$excluded_vserver" == "$candidate" ]; then
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found_excluded_vserver="1"
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break
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fi
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done
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if [ "$found_excluded_vserver" == "0" ]; then
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include="$include $VROOTDIR/$candidate"
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fi
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done
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fi
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# the backup procedure
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for SECTION in $include; do
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section="`basename $SECTION`"
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if [ ! -d "$backupdir/$SECTION/$section.0" ]; then
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mkdir -p $backupdir/$SECTION/$section.0
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fi
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info "Rotating $backupdir/$SECTION/$section..."
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echo "Rotating $backupdir/$SECTION/$section..." >> $log
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rotate $backupdir/$SECTION/$section $keep
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info "Syncing $SECTION on $backupdir/$SECTION/$section.0..."
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if [ "$from" == "local" ]; then
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debug $rsync $rsync_local_options $EXCLUDES /$SECTION/ $backupdir/$SECTION/$section.0/
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$nice $rsync $rsync_local_options $EXCLUDES /$SECTION/ $backupdir/$SECTION/$section.0/ >> $log
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if [ "$?" != "0" ]; then
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warning "Rsync error when trying to transfer $SECTION"
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fi
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elif [ "$from" == "remote" ]; then
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if [ -z "$user" ] || [ -z "$host" ]; then
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error "Config file error: either user or host was not specified"
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exit 1
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else
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debug $nice $rsync $rsync_remote_options $EXCLUDES -e "$ssh" $user@$host:/$SECTION/ $backupdir/$SECTION/$section.0
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$nice $rsync $rsync_remote_options $EXCLUDES -e "$ssh" $user@$host:/$SECTION/ $backupdir/$SECTION/$section.0 >> $log
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if [ "$?" != "0" ]; then
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warning "Rsync error when trying to transfer $SECTION"
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fi
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fi
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else
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error "Invalid source $from"
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exit 1
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fi
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$touch $backupdir/$SECTION/$section.0
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done
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# remount backup destination as read-only
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if [ "$read_only" == "1" ] || [ "$read_only" == "yes" ]; then
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mount -o remount,ro $mountpoint
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fi
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# check partition for errors
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if [ "$fscheck" == "1" ] || [ "$fscheck" == "yes" ]; then
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umount $mountpoint
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if (($?)); then
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warning "Could not umount $mountpoint to run fsck"
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else
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$nice $fsck -v -y $partition >> $log
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mount $mountpoint
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fi
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fi
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# restart services
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if [ ! -z "$service" ]; then
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for daemon in $service; do
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info "Starting service $daemon..."
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$initscripts/$daemon start
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done
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fi
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# removes the lockfile
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if [ ! -z "$lockfile" ]; then
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$rm $lockfile || warning "Could not remove lockfile $lockfile"
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fi
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echo "Finnishing backup at `date`" >> $log
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