How to switch old software stack with Lighttpd web server to the latest one with Nginx on master/slave server?

Applicable to:

Connect to the SolusVM Master/slave server over SSH.
Move out you the current system PHP binary:

# mv /usr/bin/php /usr/bin/backup-php
Create a link to SolusVM PHP binary:

# ln -s /usr/local/svmstack/php/bin/php /usr/bin/php
Install the SolusVM repository:

# yum install solusvm-release
Stop and disable Lighttpd web server:

# service lighttpd stop
# chkconfig lighttpd off
Install Nginx web server and legacy configuration:

For Master server:

# yum install svmstack-nginx svmstack-nginx-legacy-master-config

For Slave server:

# yum install svmstack-nginx svmstack-nginx-legacy-slave-config
Enable svmstack-* services:

# chkconfig svmstack-nginx on
# chkconfig svmstack-fpm on
Start services:

# service svmstack-nginx restart
# service svmstack-fpm restart