backup_directory.sh

#!/bin/bash
# +--------------------------------------------------------------------------------------+
# ! Script Name : backup_directory.sh                                                    !
# !                                                                                      !
# ! Make a tarball for a given directory including timedate in a given destination       !
# ! directory                                                                            !
# !                                                                                      !
# ! Add a cron line like this to backup your directory daily at 3 AM:                    !
# ! 0 3 * * * <SCRIPTDIRECTORY>/backup_directory.sh -d /mydir/to/backup -o /mydest       !
# !                                                                                      !
# ! Dont forget to add the user in the line if you use a /etc/cron.d file !              !
# ! 0 3 * * * root <SCRIPTDIRECTORY>/backup_directory.sh -d /mydir/to/backup -o /mydest  !
# !                                                                                      !
# +--------------------------------------------------------------------------------------+-----+
# ! CHANGELOG  :                                                                               !
# !                                                                                            !
# ! 28/03/2011 - 0.1 - Script creation                                                         !
# ! 07/01/2017 - 0.2 - Create BACKUP_LOG_DIR if not exist                                      !
# !--------------------------------------------------------------------------------------------+

#----------------------------------------------------------------------------
# SETTINGS
#----------------------------------------------------------------------------

BACKUP_LOG_DIR=/var/log/backup
BACKUP_LOG_FILE=${BACKUP_LOG_DIR}/backup_directory.log

#----------------------------------------------------------------------------
# FUNCTIONS
#----------------------------------------------------------------------------

# Log function
function message {
        if [ ! -z "$0" ] ; then
                echo -ne "`date +'%d/%m/%Y %H:%M:%S'` $*\n" | tee -a ${BACKUP_LOG_FILE}
        fi
}

# Usage function
function usage
{
    if [ ! -z "$1" ]; then
        message "Error : $1"
    fi
    message "Usage : `basename $0` -d <directory_to_backup> -o <tarball_destination>"
    exit 1
}

#----------------------------------------------------------------------------
# CHECK BACKUP_LOG_DIR
#----------------------------------------------------------------------------

if [ ! -d "${BACKUP_LOG_DIR}" ]; then
    echo "Creating ${BACKUP_LOG_DIR}"
    mkdir -pv ${BACKUP_LOG_DIR}
    if [ $? -ne 0 ]; then
        exit 2
    fi
fi

#----------------------------------------------------------------------------
# CHECK COMMAND LINE PARAMETERS
#----------------------------------------------------------------------------
#echo "before getopts:  OPTIND = $OPTIND"
while getopts 'd:o:' opt; do
    case $opt in
        d)
            OPTSFOUND=1
            if [ ! -d ${OPTARG} ]; then
                usage "Directory to backup : ${OPTARG} is invalid"
            else
                DIRECTORY_TO_BACKUP=${OPTARG}
            fi
            ;;
        o)
            OPTSFOUND=1
            if [ ! -d ${OPTARG} ]; then
                usage "Tarball destination directory ${OPTARG} is invalid"
            else
                BACKUP_DESTINATION_DIRECTORY=${OPTARG}
            fi
            ;;
        \?)
            usage "-$OPTARG is not a valid option"
            ;;
    esac
done
shift $(( $OPTIND-1 ))
#echo "after getopts:  OPTIND = $OPTIND"

if [ -z "${DIRECTORY_TO_BACKUP}" ] || [ -z "${BACKUP_DESTINATION_DIRECTORY}" ]; then
    usage "Missing argument"
fi

#----------------------------------------------------------------------------
# MAIN
#----------------------------------------------------------------------------

message "[+] Start backuping ${DIRECTORY_TO_BACKUP} to ${BACKUP_DESTINATION_DIRECTORY}"

TARBALL_FILE=`echo "${DIRECTORY_TO_BACKUP}" | sed -e 's,/,_,g' | sed -e 's,^_,,'`

TARBALL_FILE="`hostname`_${TARBALL_FILE}_`date +'%Y_%m_%d-%H_%M_%S'`.tar.bz2"

message "Creating ${BACKUP_DESTINATION_DIRECTORY}/${TARBALL_FILE}"
tar cjf ${BACKUP_DESTINATION_DIRECTORY}/${TARBALL_FILE} ${DIRECTORY_TO_BACKUP} 2>/dev/null
if [ $? -eq 0 ]; then
    message "Successfully created ${BACKUP_DESTINATION_DIRECTORY}/${TARBALL_FILE}"
else
    message "Error: something went wrong while creating"
fi