This is the Nginx configuration for hosting multiple Magento websites with php-fpm in a Centos Server. Only the basisc installation steps are mentioned here.

Steps to install Nginx, PHP-FPM, MySQL and PHPMyAdmin on Centos7 Server

Pre Install:

Disable Selinux

sed -i 's/^SELINUX=.*/SELINUX=disabled/g' /etc/selinux/config && cat /etc/selinux/config && reboot

Update packages and install Extra packages

yum update
yum install epel-release

 Nginx Installation:

 yum install nginx
 systemctl enable nginx
 systemctl start nginx

nginx.conf in kept unmodifed.

default.d directory contains the phpmyadmin vhost config.

conf.d directory contains the vhost for the websites hosted on the server. Each website is running under a seperate user. Here I have create a user named "live" changed its home_directory to "/usr/share/nginx/html/live/". The group and ownership of the document root should be "live".

PHP and php-fpm Installation:

 yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm
 yum install yum-utils
 yum-config-manager --enable remi-php71
 yum install php php-mcrypt php-cli php-gd php-curl php-mysql php-ldap php-zip php-fileinfo  php-bcmath  php-dom php-intl php- mbstring  php-soap
 systemctl enable php-fpm
 systemctl restart php-fpm

Seperate php-fpm pools are created for each user in the directory "/etc/php-fpm.d" (here live.conf).

MySQL Installation:

yum install http://www.percona.com/downloads/percona-release/redhat/0.1-4/percona-release-0.1-4.noarch.rpm
yum install Percona-Server-server-57
systemctl enable mysql
grep -i  "temporary password" /var/log/mysqld.log
mysql_secure_installation

After installation of MySQL, the root password needs to be found from the mysqld.log.This will be required mysql initialisation.