Add the following to the /etc/sysconfig/httpd

OPTIONS="-DSLAVE"
export MASTER_SERVER="SERVICENET IP HERE"

Now you add the following to the apache configuration file
Example wordpress lsync apache configuration entry:

        <IfDefine SLAVE>
          RewriteEngine On
          ProxyPreserveHost On

          ProxyPass /wp-admin/ http://${MASTER_SERVER}/wp-admin/
          ProxyPassReverse /wp-admin/ http://${MASTER_SERVER}/wp-admin/

          RewriteCond %{REQUEST_METHOD} =POST
          RewriteRule . http://${MASTER_SERVER}%{REQUEST_URI} [P]
        </IfDefine>

Note:

Sometimes lsync stops working and the error message you receive is relating to increasing inotify watches.

View Current config

cat /proc/sys/fs/inotify/max_user_watches

To calculate an estimate on the inotify values you can run the following command:

find /var/www/vhosts/ -type d | wc -l | awk '{print $1" directories needs monitoring, set [ fs.inotify.max_user_watches = " $1*3" ]"}'

To perm change the value:

echo "fs.inotify.max_user_watches=value >> /etc/sysctl.conf

sysctl -p /etc/sysctl.conf

To see what is currently being used by inotify watches you can run:

for foo in /proc/*/fd/*; do readlink -f $foo; done |grep inotify |cut -d/ -f3 |xargs -I '{}' -- ps --no-headers -o '%p %U %c' -p '{}' |uniq -c |sort -nr

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