Virtual hosting is a method for hosting multiple domain names on a computer using a single IP address. This allows one machine to share its resources, such as memory and processor cycles, to use its resources more efficiently.
One widely used application is shared web hosting. Shared web hosting prices are lower than a dedicated web server because many customers can be hosted on a single server.
Installa Apache Tomcat 7:
http://diegobenna.blogspot.com/2011/01/install-tomcat-7-in-ubuntu-1010.htmland install Apache2:
http://diegobenna.blogspot.com/2011/01/install-apache2-with-php5-and-mysql.htmlInstall the connector:sudo apt-get install libapache2-mod-jk
Now we move on to configure it to communicate with Apache Tomcat.
The first step is to create a file folder worker.properties apache like this:
sudo gedit /etc/apache2/workers.properties
End insert this text:
# Define 1 real worker using ajp13
worker.list=worker
# Set properties for worker (ajp13)
worker.worker.type=ajp13
worker.worker.host=localhost
worker.worker.port=8009
If you want add a new application in Virtual Web Host is not necessary to add a new workerX
Edit this file for connect tomcat's application with apache2:
sudo gedit /etc/apache2/httpd.conf
Past and copy this text:
ServerAdmin webmaster@localhost
DocumentRoot /var/www
<Directory />
Options FollowSymLinks
AllowOverride None
</Directory>
<Directory /var/www/>
Options Indexes FollowSymLinks MultiViews
AllowOverride None
Order allow,deny
allow from all
</Directory>
ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
<Directory "/usr/lib/cgi-bin">
AllowOverride None
Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
Order allow,deny
Allow from all
</Directory>
ErrorLog /var/log/apache2/error.log
# Possible values include: debug, info, notice, warn, error, crit,
# alert, emerg.
LogLevel warn
CustomLog /var/log/apache2/access.log combined
Alias /doc/ "/usr/share/doc/"
<Directory "/usr/share/doc/">
Options Indexes MultiViews FollowSymLinks
AllowOverride None
Order deny,allow
Deny from all
Allow from 127.0.0.0/255.0.0.0 ::1/128
</Directory>
Now we just have to disable the default configuration file for apache with:
sudo a2dissite default
We must also remove the line
NameVirtualHost *: 80 as follows:
sudo gedit /etc/apache2/ports.conf
Reload e restart apache2
sudo /etc/init.d/apache2 reload
sudo /etc/init.d/apache2 restart
Edit file jk.load for load tomcat webapps in apache2 avaible web site
cd /etc/apache2/mods-available
sudo gedit jk.load
Past and copy this text:
LoadModule jk_module /usr/lib/apache2/modules/mod_jk.so
# Where to find workers.properties
# Update this path to match your conf directory location (put workers.properties next to httpd.conf)
JkWorkersFile /etc/apache2/workers.properties
# Where to put jk shared memory
# Update this path to match your local state directory or logs directory
JkShmFile /var/log/apache2/mod_jk.shm
# Where to put jk logs
# Update this path to match your logs directory location (put mod_jk.log next to access_log)
JkLogFile /var/log/apache2/mod_jk.log
# Set the jk log level [debug/error/info]
JkLogLevel info
# Select the timestamp log format JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
And now edit proxy.conf
sudo gedit proxy.conf
This is new text:
<IfModule mod_proxy.c>
#turning ProxyRequests on and allowing proxying from all may allow
#spammers to use your proxy to send email.
ProxyRequests Off
<Proxy *>
AddDefaultCharset off
Order deny,allow
Allow from all
#Deny from all
#Allow from .example.com
</Proxy>
# Enable/disable the handling of HTTP/1.1 "Via:" headers.
# ("Full" adds the server version; "Block" removes all outgoing Via: headers)
# Set to one of: Off | On | Full | Block
ProxyVia On
</IfModule>
Create the symbolik link in apache web site avaible:
cd /etc/apache2/mods-enabled
sudo ln -s ../mods-available/jk.load ./jk.lo
We add in mods-enabled also links to the following modules
rewrite.load
proxy.load
proxy.conf
proxy_ajp.load
sudo ln -s ../mods-available/rewrite.load ./rewrite.load
sudo ln -s ../mods-available/proxy.load ./proxy.load
sudo ln -s ../mods-available/proxy.conf ./proxy.conf
sudo ln -s ../mods-available/proxy_ajp.load ./proxy_ajp.load
Create and edit the application's file (genetic is my web application name):
sudo gedit /etc/apache2/sites-available/genetic
Copy and past this text:
NameVirtualHost www.genetic.it:80
<VirtualHost www.genetic.it:80>
ServerName www.genetic.it
JKMount /genetic/* worker
JKMount /genetic worker
RewriteEngine on
RewriteRule ^/$ /genetic/ [R=permanent]
RewriteRule ^/genetic/(.*)$ ajp://localhost:8009/genetic/$1 [P]
</VirtualHost>
Create a symbolic link in enabled directory:
cd /etc/apache2/sites-enabled
sudo ln -s ../sites-available/genetic ./001-genetic
Let's create an application to be addressed
sudo gedit /usr/share/tomcat7/conf/server.xml
Add this text to hosts:
...
<Host name="www.genetic.it" appBase="webapps"
unpackWARs="true" autoDeploy="true"
xmlValidation="true" xmlNamespaceAware="false">
<Context path="" docBase="genetic/" reloadable="true" privileged="true" antiResourceLocking="false" anitJARLocking="false">
</Context>
</Host>
...
I create the folder for the application if the application does not exist
sudo mkdir /usr/share/tomcat7/webapps/genetic
cd /usr/share/tomcat7/webapps/genetic
Install application
sudo jar xvf genetic.war
Now your virtualhost in internet is actived. If you want virtualhost in localhost, edit hosts file:
sudo gedit /etc/hosts
Add in the line starting with 127.0.0.1
www.genetic.it
Install module rewritesudo a2enmod rewrite
Restart tomcat and reload Apache2
sudo /etc/init.d/apache2 reload
sudo /etc/init.d/apache2 restart
sudo /etc/init.d/tomcat7 restart
Write in your browser:
www.genetic.it
and see your tomcat webapp in apache
In the next dialog window we select Maven Webapp Archetype and click the Next button.
Now we can fill in the values for our project and press the Finish button.
NetBeans creates a new project for us. To add Jetty Maven plugin we must open the 
Now we go to Run | Run Project to start Jetty. In the Output window of NetBeans we see the following text:
We go back to NetBeans and open the file 
