wp-backup.sh

#!/bin/bash

# ThriftyPants Wordpress backup script <backup-tp.sh>
# This script was created with help from:
# http://theme.fm/2011/06/a-shell-script-for-a-complete-wordpress-backup-4/
# http://www.guyrutenberg.com/2013/03/28/incremental-wordpress-backups-using-duply-duplicity/
# http://www.mobiledev.nl/backup-complete-wordpress-site-with-a-script/

# Copyright (c) 2013, Chris Wells <[email protected]>
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without 
# modification, are permitted provided that the following conditions are met:
# 
# * Redistributions of source code must retain the above copyright notice, 
#   this list of conditions and the following disclaimer.
# 
# * Redistributions in binary form must reproduce the above copyright notice, 
#   this list of conditions and the following disclaimer in the documentation 
#   and/or other materials provided with the distribution.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Files and directories
NOW=$(date +"%Y%m%d_%H%M")
SITE="<INSERT SITE NAME HERE>"
FILE="$SITE-$NOW.tar"
WWW_DIR="<INSERT FULL PATH TO WP INSTALL DIR>"
BACKUP_DIR="<INSERT FULL PATH TO LOCAL BACKUP DIR>"
DB_FILE="$SITE-$NOW.sql"
WWW_XFORM="s,^${WWW_DIR:1},www,"
DB_XFORM="s,^${BACKUP_DIR:1},database,"

# Grab DB information from wp-config.php
DB_NAME=`echo "<?php require_once(\"${WWW_DIR}/wp-config.php\"); echo DB_NAME;" | php`
DB_USER=`echo "<?php require_once(\"${WWW_DIR}/wp-config.php\"); echo DB_USER;" | php`
DB_PASS=`echo "<?php require_once(\"${WWW_DIR}/wp-config.php\"); echo DB_PASSWORD;" | php`
DB_HOST=`echo "<?php require_once(\"${WWW_DIR}/wp-config.php\"); echo DB_HOST;" | php`

# Specify **EITHER** a GPG key as an encryption recipient, or a passphrase
# for symmetric encryption. If set, the key takes precedence.
ENC_RECP=""
ENC_PASS=""

# Remote rsync endpoint. If left empty, no remote backup will occur
RSYNC_USER=""
RSYNC_PASSWORD=""
RSYNC_PORT=""
RSYNC_HOST=""
RSYNC_MODULE=""

# Create backup of www directory
echo "Gathering www files"
tar -cf $BACKUP_DIR/$FILE --transform $WWW_XFORM $WWW_DIR/

# Create backup of database and append it to the backup tar file
echo "Creating DB dump and adding to archive"
mysqldump -u$DB_USER -p$DB_PASS $DB_NAME -r $BACKUP_DIR/$DB_FILE
tar --append --file=$BACKUP_DIR/$FILE --transform $DB_XFORM $BACKUP_DIR/$DB_FILE
rm $BACKUP_DIR/$DB_FILE

# Compress backups using gzip
echo "Compressing backup"
gzip -9 $BACKUP_DIR/$FILE

# Encrypt the backup using GPG
if [[ $ENC_RECP ]]; then
  echo "Encrypting backup"
  gpg -e -r $ENC_RECP "${BACKUP_DIR}/${FILE}.gz"
  find $BACKUP_DIR/*.gz -type f -exec rm {} \;
elif [[ $ENC_PASS ]]; then
  echo "Encrypting backup (symmetrically)"
  echo $ENC_PASS | gpg -c --batch --passphrase-fd 0 --output "${BACKUP_DIR}/${FILE}.gz.gpg" "${BACKUP_DIR}/${FILE}.gz"
  find $BACKUP_DIR/*.gz -type f -exec rm {} \;
fi

# Remove all backups older than 2 weeks
find $BACKUP_DIR/* -type f -mtime +14 -exec rm {} \;

# Rsync the local backup directory to remote location
if [[ $RSYNC_USER ]]; then
  echo "Sending backup offsite"
  export RSYNC_PASSWORD
  rsync --inplace --rsh="ssh -p${RSYNC_PORT}" $BACKUP_DIR/*.gpg $RSYNC_USER@$RSYNC_HOST::$RSYNC_MODULE/$SITE/
fi