Use mod_proxy#22014/09/15

	Enable mod_proxy and configute httpd as a reverse proxy. This example is based on the environment below. (1) www.srv.world [10.0.0.31] - Web Server#1 (2) dlp.srv.world [10.0.0.30] - Web Server#2 This example set servers that requests to Web server (1) forward to / on webserver (2)
[1]	Configure httpd.

[root@www ~]#

vi /etc/httpd/conf.d/r_proxy.conf

# create new

<IfModule mod_proxy.c>
   ProxyRequests Off
   <Proxy *>
      Order deny,allow
      Allow from all
   </Proxy>

# destination server and directory

ProxyPass / http://dlp.srv.world/
ProxyPassReverse / http://dlp.srv.world/
</IfModule>

[root@www ~]#

/etc/rc.d/init.d/httpd restart

Stopping httpd:

[ OK ]

Starting httpd:

[ OK ]

Access to / with any web browser from Clients and make sure backend server replys normally.

[2]

In addition to [1], it's possible to set load balancing function.

(1) www.srv.world [10.0.0.31] - Web Server#1
(2) www01.srv.world [10.0.0.60] - Web Server#2
(3) www02.srv.world [10.0.0.61] - Web Server#3

This example shows to configure servers that http requests to (1)'s webserver are forwarded to (2)'s webserver and (3)'s webserver.

[root@www ~]#

vi /etc/httpd/conf.d/r_proxy.conf

# create new

<IfModule mod_proxy.c>
   ProxyRequests Off
   <Proxy *>
      Order deny,allow
      Allow from all
   </Proxy>

# specify the way of load balancing with "lbmethod". it's also possible to set "bytraffic".

   ProxyPass / balancer://cluster lbmethod=byrequests
   <proxy balancer://cluster>
      BalancerMember http://www01.srv.world/ loadfactor=1
      BalancerMember http://www02.srv.world/ loadfactor=1
   </proxy>
</IfModule>

[root@www ~]#

/etc/rc.d/init.d/httpd restart

Stopping httpd:

[ OK ]

Starting httpd:

[ OK ]

Access to /proxy, then backend server is answered as settings. Push update button on your browser without breake and make sure backend server switches normally.

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