backup

#!/bin/bash
##############################
#
#  Backup script
#
##############################

#
# Usage and parse options
#
usage() {
  echo "Usage: $0 [-n] [-f configfile]" 1>&2
  exit 1
}

while getopts f:nh OPT
do
  case $OPT in
    f)  cfgfile=$OPTARG
        ;;
    n)  DRY_RUN=1
        echo "Dry run!"
        export DRY_RUN
        ;;
    h)  usage
        ;;
    \?) usage
        ;;
  esac
done

shift $((OPTIND - 1))

#
# Move basedir
#
BASEDIR=${0%/*}
BASEDIR=$(cd $BASEDIR && pwd)

#
# Load config file and setup env
#
if [ "$cfgfile" == "" ]; then
  cfgfile=$BASEDIR/backup.conf
fi
if [ ! -f $cfgfile ]; then
  echo "Config file not found!"
  exit 1
fi
. $cfgfile

#
# Buckets
#
if [ "$Buckets" == "" ]; then
  echo "Buckets not defined!"
  exit 1
fi


#
# Setup backup temp dir
#
if [ -z "${BackupTmpDir+x}" ]; then
  echo "Backup temp dir not defined!"
  exit 1
fi
bkupdir=$BackupTmpDir

if [[ ! "$BackupTmpDir" =~ te?mp$ ]]; then
  echo "Backup temp dirname must end with 'temp' or 'tmp'!"
  exit 1
fi

if [ -d $bkupdir ]; then
  # Remove temporary archives
  rm -rf $bkupdir/*
else
  # Make temporary directory
  mkdir $bkupdir
fi
if [ $? -ne 0 ]; then
  exit 1
fi


backupdir="$DestDir"
buckets=(`echo $Buckets | tr -s ',' ' '`)

epochsec=`date +"%s"`
epochday=$((epochsec / 86400))
dayidx=$((epochday % MaxAge))

bknum=${#buckets[@]}
bkidx=$((epochday % bknum))
bucket=${buckets[$bkidx]}


#
# Logging
#
if [ -z "${LogDir+x}" ]; then
  logfile=/dev/null
else
  # Delete old logfiles
  find $LogDir -mtime +$MaxLogAge -name "*.log.*" | xargs rm -f
  logfile=$LogDir/backup.log.`date +\%Y\%m\%d\%H\%M`
fi


#
# Start
#
echo "Day Index: $dayidx"      | tee $logfile
echo "Bucket: $bucket"         | tee -a $logfile
echo "Host: `hostname`"        | tee -a $logfile
echo "Backup start at `date`." | tee -a $logfile


#
# Backup scripts
#
BKUP_PREFIX=$bkupdir/$dayidx-

cd $BASEDIR
tar zcf ${BKUP_PREFIX}backup-scripts.tgz *

BKUP_DIR=$bkupdir
export BKUP_DIR
export BKUP_PREFIX

if [ "$BackupCmdDir" == "" ]; then
  BackupCmdDir=$BASEDIR/bkcmd.d
fi
cd $BackupCmdDir
for cmd in `ls S*`
do
  ./$cmd >>$logfile 2>&1
  if [ $? -eq 0 ]; then
    echo -e "[OK] $cmd" | tee -a $logfile
  else
    echo -e "[NG] $cmd" | tee -a $logfile
  fi
done


#
# Syncing to the cloud
#
echo "Start to synchronize files to cloud." | tee -a $logfile
if [ "$Sync" == "" ]; then
  Sync=$BASEDIR/sync
fi
$Sync $bkupdir $bucket $backupdir
if [ $? -eq 0 ]; then
  result=0
  echo -e "[OK] Sync" | tee -a $logfile
else
  result=1
  echo -e "[NG] Sync" | tee -a $logfile
fi


#
# Exit
#
if [ $result -eq 0 ]; then
  echo "Backup done at `date`."   | tee -a $logfile
  exit 0
else
  echo "Backup failed at `date`." | tee -a $logfile
  exit 1
fi