1.Download latest version of Apache HTTP Server.
2.Untar the file and change directory to the httpd folder created on uncompression.
3.Do the Apche compilation as Root user as follows:
#./configure –prefix=/opt/installs/apache2 –enable-deflate –enable-proxy –enable-proxy-html –enable-proxy-balancer –enable-rewrite –enable-cache–enable-mem-cache –enable-ssl –enable-headers
#make
#make install
*note it should be –enable so edit it if ists shown as ‘-’ on copying ..I had faced that many times on copy-paste 
Add the following entries at end of httpd.conf
#note: This to connect Apache with Mongrel on 4000 and 4001 ports, if you wanna add a differnt server use that servers local or public IP instead of 127.0.0.1
#added on rails clustering by anoop
<Proxy balancer://mycluster>
# cluster member 1
BalancerMember http://127.0.0.1:6000
BalancerMember http://127.0.0.1:6001
</proxy>
#these virtual host contains the main configurations including mod deflate rules
<VirtualHost *:80>
ServerAdmin admin@greentripp.in
ServerName localhost.localdomain
ServerAlias localhost
ProxyPass / balancer://mycluster/
ProxyPassReverse / balancer://mycluster/
ErrorLog /var/log/apache_error_log
CustomLog /var/log/apache_access_log combined
#Deflate rules used in LB1 by anoop
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript
DeflateCompressionLevel 9
BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4\.0[678] no-gzip
BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
DeflateFilterNote Input instream
DeflateFilterNote Output outstream
DeflateFilterNote Ratio ratio
</VirtualHost>
Confs. over
Now start mongrel_cluster from the root folder of your rails application
# mongrel_rails start -d -e production -p 6000
# mongrel_rails start -d -e production -p 6001 -P logs/mongrel2.pid
*you may add
Start Apache HTTP server:
#/opt/installs/apache2/bin/apachectl -k start
