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Many peoples got problems with Apache Load if their website is having a high traffic.

There’re are also many solutions regarding this

• Buy new higher specs of Hardware
• Make a clustered webserver
• More optimization

What we will do in this article is MORE OPTIMIZATION

I assume that you already have Apache installed and running.

Nginx Installation

Download the latest version of nginx from nginx.net

wget http://sysoev.ru/nginx/nginx-0.7.63.tar.gz

Extract nginx

tar zxvf nginx-0.7.63.tar.gz

Now is the time to compile nginx

cd nginx-0.7.63

./configure –prefix=/etc/nginx

make && make install

If you got an error, make sure you need to install nginx dependencies such as

• libpcre
• libpcre-dev
• libssl
• libssl-dev
• zlib1g
• zlib1g-dev

If you have successfully installed nginx, then it’s the time to configure the nginx to works as we expected

When installation process, we have described that nginx is installed at /etc/nginx. So that the configuration location should be on /etc/nginx/conf/nginx.conf

Here’s the example of the nginx.conf

user www-data;
worker_processes 2;
error_log /var/log/error.log;

events {
worker_connections 1024;
use epoll;
}

server {
listen 80;
server_name your.server.name;
index index.php index.html;
root /path/to/your/root/directory;

location = /1×1.gif {
empty_gif;
}

location ~* ^.+\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|wav|bmp|rtf|js)$ {
expires 10d;
}

location / {
proxy_pass http://127.0.0.1:8080/;
proxy_redirect off;

proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_intercept_errors off;

client_body_buffer_size 128k;

proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;

proxy_buffer_size 8k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;

}

}

Check with command nginx -t to make sure you have the correct configuration.

It should appear as below

# nginx -t
the configuration file /etc/nginx/conf/nginx.conf syntax is ok
configuration file /etc/nginx/conf/nginx.conf test is successful

Now it’s the time to reconfigure your apache settings.

Before we start, we need to add new modules of apache. This module is used for apache to read the REAL IP of the clients that’s forwarded by nginx.

Structure : Clients –> nginx –> Apache

If we don’t install this module, on apache logs you’ll see 127.0.0.1 as the clients. Because nginx and apache is on the same machine.

Installing rpaf Module for Apache

cd /usr/local/src

wget http://stderr.net/apache/rpaf/download/mod_rpaf-0.6.tar.gz

tar xzf mod_rpaf-0.6.tar.gz

cd mod_rpaf-0.6

nano /usr/local/src/mod_rpaf-0.6/makefile

Change APXS=$(shell which apxs) to APXS=/usr/sbin/apxs.

Or to make sure, you can type whereis apxs to find your current apxs path

There’re 2 options to compile rpaf module

• make rpaf-2.0 && make install-2.0
• apxs -i -c -n mod_rpaf-2.0.so mod_rpaf-2.0.c

Now edit your httpd.conf, and add the value below

LoadModule rpaf_module modules/mod_rpaf-2.0.so

#Mod_rpaf settings
RPAFenable On
RPAFproxy_ips 127.0.0.1
RPAFsethostname On

On apache virtual host settings, you should change from *:80 into *:8080 to make it works

Last step, we need to restart Apache service.

/etc/init.d/httpd restart

To start nginx service, please read Adding Nginx Startup Script on CentOS/RedHat

This entry was posted on Thursday, November 12th, 2009 at 11:15 am and is filed under Unix. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.