Manual Installation Of Nginx In cPanel Apache In Proxy Mode

1. In order to get the cPanel server ready for nginx – you must first install an Apache module called mod_rpaf

Login as root:
# cd /usr/local/src
# wget http://stderr.net/apache/rpaf/download/mod_rpaf-0.6.tar.gz
# tar xvzf mod_rpaf-0.6.tar.gz
# cd mod_rpaf-0.6
# /usr/local/apache/bin/apxs -i -c -n mod_rpaf-2.0.so mod_rpaf-2.0.c

2. Doing so will install the module into the Apache module directory.

Then Go to your  Web Host Manager (WHM) follow the tree here:
Main >> Service Configuration >> Apache Configuration > Include Editor > Pre Main Include and Select the Apache version that is running on your cPanel server. and then add following code section there, and replace (place your ip’s here without the brackets) with the list of IP addresses on your Cpanel server:

==================================================
LoadModule rpaf_module modules/mod_rpaf-2.0.so

RPAFenable On
# Enable reverse proxy add forward

RPAFproxy_ips 127.0.0.1  (place all your ips here without the brackets)

RPAFsethostname On
# let rpaf update vhost settings allowing to have
# the same hostnames as in the “actual” configuration for the
# forwarding apache installation

RPAFheader X-Real-IP
# Allows you to change which header we have mod_rpaf looking for
# when trying to find the ip the that is forwarding our requests
===================================================

3. Once this is completed – we are ready to move Apache to another port. To move the Apache to another port follow the below:

Go to your WHM  >> “tweak settings”  and change the apache port from 80 to 81 (find 0.0.0.0:80 and change it to 0.0.0.0.:81)

4. Do the following

# /usr/local/cpanel/whostmgr/bin/whostmgr2 –updatetweaksettings

5. Check your “/usr/local/apache/conf/httpd.conf”  for any occurrences of port 80,
#  vi /usr/local/apache/conf/httpd.conf

Find for port 80 if you found any occurrences of port 80 then rebuild your apache configuration file by running
# /scripts/rebuildhttpdconf   and make sure your httpd.conf file is up to date

6. Then run
# /etc/init.d/httpd restart

7. Now install Nginx. You must install pcre library in order to install Nginx on your cPanel server:

# wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-7.9.tar.gz
# tar xvzf pcre-7.9.tar.gz
# cd pcre-7.9
# ./configure
# make
# make install

Now Install Nginx

#wget http://sysoev.ru/nginx/nginx-0.7.63.tar.gz
# tar xvzf nginx-0.7.63.tar.gz
# cd nginx-0.7.63
# ./configure
# make
# make install

9. Create nginx.sh file and put the below code section to the file :

# vi  nginx.sh
===================================================================
#!/bin/sh

cat > “/usr/local/nginx/conf/nginx.conf” <<EOF
user  nobody;
# no need for more workers in the proxy mode
worker_processes  2;

error_log  logs/error.log info;

worker_rlimit_nofile  8192;

events {
worker_connections  1024; # you might need to increase this setting for busy servers
use epoll; #  Linux kernels 2.6.x change to epoll
}

http {
server_names_hash_max_size 2048;

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

sendfile on;
tcp_nopush on;
tcp_nodelay on;

keepalive_timeout  10;

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

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;

include “/usr/local/nginx/conf/vhost.conf”;
}

EOF

/bin/cp /dev/null /usr/local/nginx/conf/vhost.conf

cd /var/cpanel/users
for USER in *; do
for DOMAIN in `cat $USER | grep ^DNS | cut -d= -f2`; do
IP=`cat $USER|grep ^IP|cut -d= -f2`;
ROOT=`grep ^$USER: /etc/passwd|cut -d: -f6`;
echo “Converting $DOMAIN for $USER”;

cat >> “/usr/local/nginx/conf/vhost.conf” <<EOF
server {
access_log off;

error_log  logs/vhost-error_log warn;
listen    80;
server_name  $DOMAIN www.$DOMAIN;

location ~* \.(gif|jpg|jpeg|png|ico|wmv|3gp|avi|mpg|mpeg|mp4|flv|mp3|mid|js|css|html|htm|wml)$ {
root   $ROOT/public_html;
}

location / {
client_max_body_size    10m;
client_body_buffer_size 128k;

proxy_send_timeout   90;
proxy_read_timeout   90;

proxy_buffer_size    4k;
# you can increase proxy_buffers here to suppress “an upstream response
#  is buffered to a temporary file” warning
proxy_buffers     16 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;

proxy_connect_timeout 30s;

proxy_redirect  http://www.$DOMAIN:81   http://www.$DOMAIN;
proxy_redirect  http://$DOMAIN:81   http://$DOMAIN;

proxy_pass   http://$IP:81/;

proxy_set_header   Host   \$host;
proxy_set_header   X-Real-IP  \$remote_addr;
proxy_set_header   X-Forwarded-For \$proxy_add_x_forwarded_for;
}
}
EOF
done
done
===================================================================================

8. Save the file and change the permission and then run :
# chmod 755 nginx.sh
# sh nginx.sh

9. Now Check the  Nginx configuration
#/usr/local/nginx/sbin/nginx -t

=============================
Great install instructions, everything worked fine just some additional info if you get error like  invalid event type “rtsig” when you run this command: # /usr/local/nginx/sbin/nginx -t

To correct this error you should do this: vi /usr/local/nginx/conf/nginx.conf
Find line 11 and change “rtsig” to “epoll” .

This error occurs in case your server is using kernel 2.4.x
===============================

10. Restart Nginx
# /usr/local/nginx/sbin/nginx

11. create init script

# vi /etc/init.d/nginx
And put the below code section to the file:
========================================================================
#!/bin/sh
#
# nginx – this script starts and stops the nginx daemin
# Taken from http://www.hikaro.com
# chkconfig:   – 85 15
# description:  Nginx is an HTTP(S) server, HTTP(S) reverse \
#               proxy and IMAP/POP3 proxy server
# processname: nginx
# config:      /usr/local/nginx/conf/nginx.conf
# pidfile:     /usr/local/nginx/logs/nginx.pid

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ “$NETWORKING” = “no” ] && exit 0

nginx=”/usr/local/nginx/sbin/nginx”
prog=$(basename $nginx)

NGINX_CONF_FILE=”/usr/local/nginx/conf/nginx.conf”

lockfile=/var/lock/subsys/nginx

start() {
[ -x $nginx ] || exit 5
[ -f $NGINX_CONF_FILE ] || exit 6
echo -n $”Starting $prog: ”
daemon $nginx -c $NGINX_CONF_FILE
retval=$?
echo
[ $retval -eq 0 ] && touch $lockfile
return $retval
}

stop() {
echo -n $”Stopping $prog: ”
killproc $prog -QUIT
retval=$?
echo
[ $retval -eq 0 ] && rm -f $lockfile
return $retval
}

restart() {
configtest || return $?
stop
start
}

reload() {
configtest || return $?
echo -n $”Reloading $prog: ”
killproc $nginx -HUP
RETVAL=$?
echo
}

force_reload() {
restart
}

configtest() {
$nginx -t -c $NGINX_CONF_FILE
}

rh_status() {
status $prog
}

rh_status_q() {
rh_status >/dev/null 2>&1
}

case “$1” in
start)
rh_status_q && exit 0
$1
;;
stop)
rh_status_q || exit 0
$1
;;
restart|configtest)
$1
;;
reload)
rh_status_q || exit 7
$1
;;
force-reload)
force_reload
;;
status)
rh_status
;;
condrestart|try-restart)
rh_status_q || exit 0
;;
*)
echo $”Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}”
exit 2
esac
========================================================================================

11. save the code and execute
# chmod +x /etc/init.d/nginx

12. make it start when the server run
# /sbin/chkconfig nginx on

13.You can run following command to check if its running:

# service nginx start
# service nginx stop
# service nginx restart
# service nginx reload
# service nginx configtest
# service nginx status

14. To Create an automatic virtual host entry in nginx virtual host configuration  (/usr/local/nginx/conf/vhost.conf)  when cPanel account get created on the server follow the below instructions:

Go to the cPanel script that is :

# vi /scripts/postwwwacct
# chmod 755 /scripts/postwwwacct
and put the same code that is used in “nginx.sh” in the step 9 and it will create an virtual host entry to the nginx.

15.To remove virtual host entry from nginx virtual host configuration (/usr/local/nginx/conf/vhost.conf)  when cPanel account get terminated from the server follow the below instructions:

Go to the cPanel script that is :

# vi /scripts/postwkillacct
# chmod 755 /scripts/postwkillacct

and put the same code that is used in “nginx.sh” in the step 9 and it will create an virtual host entry to the nginx.

DONE!! Cheers!!!!