rsync-backup

#!/bin/bash
#-------------------------------------------------------------------------------
# dit script backupt de /root/ /home/ /etc/ en /usr/ en de /data
# flip hess 2011 06 20 [email protected]
#
#-------------------------------------------------------------------------------

# Global variables:

PATH='/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin'
SCRIPT_PATH="${0}"
HOST="${1}"


# Functions:

# The main function.
function fMain()
{
  # source and destination:
  local DEST_DIR="/backups/${HOST}"
  local SOURCEDIRS='etc root usr home var data'

  # tunnel settings:
  local SSH='ssh -A'
  local SSHPORT='2222'

  # ssh settings:
  local KEYCHAIN_FILE='/root/.keychain/backup-sh'

  # rsync settings:
  local RSYNC="rsync"
  local RUSER='root'

  # time settings:
  local TIME_STAMP="$(date '+%F_%H.%M.%S')"

  # Check whether arguments are given:
  if [ ${#} != 1 ]
  then
    fShowUsage
    return 1
  fi

  # Load SSH agent environment variables:
  if [ -f "${KEYCHAIN_FILE}" ]
  then
    . "${KEYCHAIN_FILE}"
  else
    echo "\"${KEYCHAIN_FILE}\" does not exist!"
    return 3
  fi

  # Check target directory:
  if [ ! -d "${DEST_DIR}" ]
  then
    echo "Backup directory \"${DEST_DIR}\" does not exist!"
    return 2
  fi

  # Check whether SSH to  host without password is possible:
  if ( ! ${SSH} -p${SSHPORT} -o 'BatchMode yes' -qq ${USER}@${HOST} exit 0 )
  then
    echo "No SSH access to host ${HOST}"
    return 4
  fi

  # ALL DIRS BACKUPPEN

  # for loopje:
  for SOURCEDIR in ${SOURCEDIRS}
  do
     # Check target directory:
     if [ ! -d ${DEST_DIR}/${SOURCEDIR} ]
     then
       echo "${DEST_DIR}/${SOURCEDIR} does not exist, creating..."
       mkdir -p ${DEST_DIR}/${SOURCEDIR}
       # check exit code
       if [ ${?} != 0 ]
       then
         echo "Failed to create ${DEST_DIR}/${SOURCEDIR}, skipping....."
         continue
       fi
     fi

     # rsync dir to backupdir location:
     ${RSYNC} --exclude '.gvfs' -avz -e "${SSH} -p${SSHPORT}" ${RUSER}@${HOST}:/${SOURCEDIR} ${DEST_DIR}/${SOURCEDIR}

     # check if succeeded
     if [ ${?} != 0 ]
     then
       echo " offdisk backup of ${SOURCEDIR} on \"${TIME_STAMP}\" has failed "
       continue
     fi
  done


  return 0
}

# Shows usage.
function fShowUsage()
{
  echo "Usage: ${SCRIPT_PATH} HOST"
  return 0
}


# Start the program:
fMain "${@}"

# Exit with previous return code:
exit "${?}"