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pull-datasync.sh
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pull-datasync.sh
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#!/usr/bin/env bash
# pull-datasync.sh
# Pull site updates down from master to front end web servers via rsync
#
# Copyright (c) 2013, Stephen Lang
# All rights reserved.
#
# Git repository available at:
# https://github.com/stephenlang/datasync
#
# 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.
##########################################
# Server Configuration Options #
##########################################
# Define the master webserver
master_webserver="web01"
# List of directories to keep in sync
# DO NOT include trailing slash!
include_list=( /var/www )
# Output file to monitor datasync status
status="/var/www/html/datasync.status"
##########################################
# End User Configuration Settings #
##########################################
# Check to see if rsync is already running
if [ -d /tmp/.rsync.lock ]; then
echo "FAILURE : rsync lock exists : Perhaps there is a lot of new data to pull from the master server. Will retry shortly" > $status
exit 1
fi
# Create lock file
/bin/mkdir /tmp/.rsync.lock
if [ $? = "1" ]; then
echo "FAILURE : can not create lock" > $status
exit 1
else
echo "SUCCESS : created lock" > $status
fi
# Begin rsync
for directory in ${include_list[@]}; do
echo "===== Beginning rsync of $directory ====="
nice -n 20 /usr/bin/rsync -axvz --delete -e ssh root@$master_webserver:$directory/ $directory/
if [ $? = "1" ]; then
echo "FAILURE : rsync failed. Please refer to solution documentation" > $status
exit 1
fi
echo "===== Completed rsync of $directory ====="
done
# Remove lock file and update status
/bin/rm -rf /tmp/.rsync.lock
echo "SUCCESS : rsync completed successfully" > $status