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Linux How to..

Linux How to ,Share Knowledge

Nginx(fontend) as a reverse Proxy for Apache(Backend)

Before Apply Solution

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client --http port tcp 80 -->  Apache Web Server

After Apply Solution

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client --http port tcp 80 --> Nginx - http port tcp 8080 ->  Apache Web Server
Server OS :Centos

– Install Apache
#yum install httpd httpd-devel -y

Configure the Reverse Proxy settings on Apache
#vim /etc/httpd/conf/httpd.conf

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Listen 80
to
Listen 8080

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NameVirtualHost *:80
to
NameVirtualHost *:8080

<VirtualHost *:8080>
ServerName www.yourdomain.com
ServerAlias yourdomain.com
DocumentRoot /var/www/yourdomain.com
<Directory "/var/www/yourdomain.com">
Options FollowSymLinks -Includes
AllowOverride All
Order allow,deny
Allow from all
</Directory>
RewriteEngine on

</VirtualHost>

#/etc/init.d/httpd restart

Install Nginx with yum
#yum install nginx -y

#vim /etc/nginx/nginx.conf

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user nginx;
worker_processes  4;
error_log  logs/error.log crit;
#error_log  logs/error.log info;

# set open fd limit to 30000
worker_rlimit_nofile 30000;

events {
worker_connections  8192; # you might need to increase this setting for busy servers
multi_accept on;
use epoll; #  Linux kernels 2.6.x change to epoll
}

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;

# Other configurations
ignore_invalid_headers on;
client_max_body_size    8m;
client_header_timeout  3m;
client_body_timeout 3m;
send_timeout     3m;
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;

# virtual hosts includes
include "/etc/nginx/conf.d/*.conf";

}

and create virtual host on nginx

/etc/nginx/conf.d/yourdomainname.com.conf

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server {
listen    80;
server_name  www.yourdomainname.com yourdomainname.com;
access_log off;
error_log  logs/www.yourdomainname.com-error_log crit;

location ~* .(gif|jpg|jpeg|png|ico|wmv|3gp|avi|mpg|mpeg|mp4|flv|mp3|mid|js|css|html|htm|wml)$ {
root /var/www/yourdomainname.com;
expires 365d;
}

location / {
client_max_body_size    10m;
client_body_buffer_size 128k;

proxy_send_timeout   90;
proxy_read_timeout   90;
proxy_buffer_size    128k;
proxy_buffers     4 256k;
proxy_busy_buffers_size 256k;
proxy_temp_file_write_size 256k;
proxy_connect_timeout 30s;

proxy_redirect  http://www.yourdomainname.com:8080   http://www.yourdomainname.com;
proxy_redirect  http://yourdomainname.com:8080   http://yourdomainname.com;

proxy_pass   http://127.0.0.1:8080/;

proxy_set_header   Host   $host;
proxy_set_header   X-Real-IP  $remote_addr;
proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
}
}
Install mod_rpaf
mod_rpaf will help Apache to know who connects to it (otherwise the only IP address you will see in your logs is 127.0.0.1):

mkdir /root/installed/
cd /root/installed/
wget https://github.com/y-ken/mod_rpaf/archive/master.zip
unzip master.zip
cd mod_rpaf-master/
apxs -i -c -n mod_rpaf-2.0.so mod_rpaf-2.0.c

#vim /etc/httpd/conf.d/rpaf.conf

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LoadModule rpaf_module /usr/lib64/httpd/modules/mod_rpaf-2.0.so

#Reverse proxy
RPAFenable On
RPAFsethostname On
RPAFproxy_ips 127.0.0.1 Your_Real_Server_IP
#/etc/init.d/httpd restart

curl -I http://www.yourdomainname.com/

output :

HTTP/1.1 200 OK
Server: nginx

Complete!!!!!

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