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How to install Nginx on CentOS 7

CentOS 7 has been online since a few months now. It includes many advantages and changes over the previous 6.5.x version. And if you are one of the lucky ones that have CentOS 7 installed, on this tutorial I will guide you on how to install Nginx on CentOS 7.  The only requirement for this tutorial is root access via shell and a fresh CentOS installation.

centos

Installing Nginx on CentOS 7

Get the Nginx repo for EL 7:

mkdir /root/temp; cd /root/temp
wget http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm
rpm -i nginx-release-centos-7-0.el7.ngx.noarch.rpm

Install Nginx

yum install nginx

Update Nginx on CentOS 7

Already have Nginx installed? Then you probably have the Nginx EL7 repo installed and all you need to do in order to update your Nginx version is run this command:

yum update nginx

Then reload Nginx service to apply changes:

service nginx reload

Nginx Configuration

The Nginx configuration files can be found at /etc/nginx, where /etc/nginx/nginx.conf is the main configuration file. This is a generic nginx.conf configuration file for CentOS:

user  nginx;
worker_processes  8; # tweak according to # of cores you have
error_log  logs/error.log crit;

worker_rlimit_nofile  8192;

events {
worker_connections  800; # you might need to increase this setting for busy servers
use epoll; #  Linux kernels 2.6.x
}

http {
server_names_hash_max_size 2048;
server_names_hash_bucket_size 512;

server_tokens off;

include    mime.types;
default_type  application/octet-stream;

sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout  10;

# Gzip on
gzip on;
gzip_min_length  1100;
gzip_buffers  4 32k;
gzip_types    text/plain application/x-javascript text/xml text/css;

# Generic & timeout configs
ignore_invalid_headers on;
client_max_body_size    20m;
client_body_buffer_size 15m;
client_header_timeout  400;
client_body_timeout 400;
send_timeout     400;
connection_pool_size  256;
client_header_buffer_size 4k;
large_client_header_buffers 4 32k;
request_pool_size  4k;
output_buffers   4 32k;
postpone_output  1460;

# Cache most accessed static files
open_file_cache          max=10000 inactive=10m;
open_file_cache_valid    2m;
open_file_cache_min_uses 1;
open_file_cache_errors   on;

# Vhosts includes
include "/etc/nginx/conf.d/*.conf";
}

Setting up Nginx Virtual Hosts

You can create your virtual hosts files (domain configurations) like this:

nano -w /etc/nginx/conf.d/yoursite.com.conf

This is a generic vhost configuration for Nginx:

### yoursite.com

server {
access_log off;
log_not_found off;
error_log  logs/error_log warn;
        listen       80;

        server_name  yoursite.com www.yoursite.com;

        location / {
            root  /var/www/yoursite.com;
            index  index.php index.html index.htm;
        }

        location ~* .(gif|jpg|jpeg|png|ico|wmv|3gp|avi|mpg|mpeg|mp4|flv|mp3|mid|js|css|wml|swf)$ {
        root   /var/www/yoursite.com;
                expires max;
                add_header Pragma public;
                add_header Cache-Control "public, must-revalidate, proxy-revalidate";
        }


# PHP-FPM: uncomment if you use php-fpm for php processing

        #location ~ .php$ {
        #    root           /var/www/yoursite.com;
        #    try_files $uri =404;
        #    fastcgi_pass   unix:/tmp/php5-fpm.sock;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        #    include        fastcgi_params;
        #    fastcgi_buffer_size 128k;
        #    fastcgi_buffers 256 4k;
        #    fastcgi_busy_buffers_size 256k;
        #    fastcgi_temp_file_write_size 256k;
        #}


}

Reload Nginx to apply changes:

service nginx reload

That’s all, now you have latest Nginx version installed on CentOS 7 and a few configuration examples to get rolling.

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Esteban Borges

Linux Geek, Webperf Addict, Nginx Fan. CTO @Infranetworking