rbackup

   1 #!/bin/sh
   2 . /opt/corvix/etc/rbackup.conf
   3 [[ -e $HOME/.rbackup.conf ]] && . $HOME/.rbackup.conf
   4
   5 while getopts "l" opt; do
   6    case $opt in
   7       l) OPTS="--bwlimit=66";;
   8    esac
   9 done
  10 shift $(($OPTIND -1))
  11
  12 ERUNNING=4
  13
  14 NICE="nice -n 19 "
  15 RM="$NICE rm"
  16 MV="$NICE mv"
  17 RSYNC="$NICE /usr/bin/rsync"
  18 CP="$NICE cp"
  19 SSH="ssh"
  20 LOGFILE=/opt/corvix/var/log/rbackup
  21 RUNFILE=/opt/corvix/var/run/rbackup
  22
  23 _set_running() {
  24    echo $TASK > $RUNFILE
  25 }
  26
  27 _unset_running() {
  28    rm -f $RUNFILE
  29 }
  30
  31 _is_running() {
  32    test -e $RUNFILE
  33 }
  34
  35 _log() {
  36    echo $@
  37    echo $@ >> $LOGFILE
  38 }
  39
  40 _rotate() {
  41    name=$1
  42    interval=$2
  43    path=$3
  44    host=$4
  45    _log "Rotate $name in $path on $host:"
  46    $SSH $host "[[ -d $path ]] || mkdir -p $path"
  47    if  $SSH $host "[[ -d $path/$name.$interval ]]" ; then
  48       _log "Delete expired snapshot $interval on $host"
  49       $SSH $host "$RM -rfv $path/$name.$interval" 2>&1 1>>$LOGFILE
  50    fi
  51    for i in $(seq $(($interval-1)) -1 0); do
  52       $SSH $host "[[ -d $path/$name.$i ]]" || continue;
  53       _log "Rotate snapshot $i on $host"
  54       $SSH $host "$MV -v $path/$name.$i $path/$name.\$(($i+1))" 2>&1  1>>$LOGFILE
  55    done
  56 }
  57
  58 _backup() {
  59    source=$1
  60    name=$2
  61    target=$3
  62    host=$4
  63    _log "Backup $name to $target on $host:"
  64    $RSYNC -v -a --delete-excluded --exclude-from=$HOME/.rbackup.exclude --delete $OPTS --link-dest=../$name.1 $source/ $host:$target/$name.0/ 2>&1 1>>$LOGFILE
  65 }
  66
  67 TASK=$1
  68 case $TASK in
  69    hourly) INTERVAL=$HOURLY_INTERVAL;;
  70    daily) INTERVAL=$DAILY_INTERVAL;;
  71    weekly) INTERVAL=$WEEKLY_INTERVAL;;
  72    monthly) INTERVAL=$MONTHLY_INTERVAL;;
  73    *) exit 0 ;;
  74 esac
  75
  76 _is_running && exit $ERUNNING
  77 _set_running
  78
  79 _rotate $TASK $INTERVAL $TARGET/$SOURCE $HOST
  80 _backup $SOURCE $TASK $TARGET/$SOURCE $HOST
  81
  82 _unset_running
  83