s3.common

   1 # Common functions for dealing with Amazon S3.
   2
   3 # units for BWLIMIT are KB/s
   4 BWLIMIT=325
   5 # units for CHUNKSIZE are MB
   6 CHUNKSIZE=5000
   7
   8 BUCKET=hcoop.net-backups
   9 BACKUPDIR=full
  10 SUBDIR=$(date +%Y.%m.%d)
  11 S3CMD=$(dirname $0)/s3
  12
  13 IFS=$'\n'
  14
  15 export S3_ACCESS_KEY_ID=$(cat ~mwolson_admin/.amazon/access.key)
  16 export S3_SECRET_ACCESS_KEY=~mwolson_admin/.amazon/secret.key
  17
  18 function s3_cmd () {
  19     # $1: command (get|put|ls|rm)
  20     # $2: remote file
  21     # $3: local file
  22     local cmd=$1
  23     shift
  24     local bwarg
  25     if test "$cmd" = "put"; then
  26         bwarg="${BWLIMIT}K";
  27     else
  28         bwarg=
  29     fi
  30     $S3CMD $cmd $BUCKET "$1" "$2" $bwarg
  31 }
  32
  33 function move_over () {
  34     # Move file to its offsite destination
  35     # $1: file, $2: relative directory (optional)
  36     if test -z "$1" || test -n "$3"; then
  37         echo "Bad programming"
  38         exit 1
  39     fi
  40     local FILE=$1
  41     local DEST=$BACKUPDIR/$SUBDIR
  42     if test -n "$2"; then
  43         DEST=$DEST/$2
  44     fi
  45     split -d -b ${CHUNKSIZE}m $FILE ${FILE}.
  46     for i in ${FILE}.*; do
  47         s3_cmd put $DEST/$i $i
  48         rm -f $i
  49     done
  50     rm -f $FILE
  51 }
  52
  53
  54 function prune_old_backups () {
  55     # Implement me
  56     local oldpwd=$PWD
  57     cd $BACKUPDIR
  58     find . -mindepth 1 -maxdepth 1 -type d -ctime +7 \
  59         -execdir rm -fr '{}' \; || true
  60     rm -rf $SUBDIR
  61     mkdir -p $SUBDIR
  62     cd $oldpwd
  63 }