Push site updates from master server to front end web servers via rsync

sync.sh

#!/bin/bash
#sync.sh - Push site updates from master server to front end web servers via rsync
# USAGE:
#  ./sync.sh (rsync all node)
#	./sync.sh portal2 portal4 (rsync for node portal2 and portal4)
#
# Original script: http://www.stephenlang.net/2012/09/keeping-multiple-web-servers-in-sync-with-rsync/

WEBSERVERS=(${@-portal1 portal2 portal3 portal4 portal5})
STATUS="/srv/www/htdocs/sync.status"
HTDOCS="/srv/www/htdocs"

if [ -d /tmp/.rsync.lock ]; then
    echo "FAILURE : rsync lock exists : Perhaps there is a lot of new data to push to front end web servers. Will retry soon." > $STATUS
	exit 1
fi

/bin/mkdir /tmp/.rsync.lock

if [ $? = "1" ]; then
	echo "FAILURE : can not create lock" > $STATUS
	exit 1
else
	echo "SUCCESS : created lock" > $STATUS
fi

for i in ${WEBSERVERS[@]}; do

	echo "===== BEGINNING RSYNC OF $i ====="

	nice -n 20 /usr/bin/rsync -avzx --delete -e ssh $HTDOCS root@$i:$HTDOCS

	if [ $? = "1" ]; then
	    echo "FAILURE : rsync failed. Please refer to the solution documentation " > $STATUS
		exit 1
	fi

	echo "===== COMPLETED RSYNC OF $i =====";
done

/bin/rm -rf /tmp/.rsync.lock
echo "SUCCESS : RSYNC COMPLETED SUCCESSFULLY" > $STATUS