How to configure Apache and Tomcat for Grails applications?

There are two parts to understand here 
1- Apache frontend static content serving server
2- Tomcat for dynamic request processing like jps,jsf,grails,spring framework


We need to configure two things here.
Lets assume that you have apache running on your maching and you just want to configure it for tomcat connectivity .


Find httpd.conf  and configure the below settings and change the mydomain1 and mydomain2 by your actual domain . please make you have the right path for example - /var/log/apach2/error-domain1.log , if you have other path , than configure that one.

ProxyRequests Off

  ErrorLog /var/log/apache2/error-domain1.log

  <Directory proxy:http://www.mydomain1.com:80>

        Order Allow,Deny

        Allow from all

  </Directory>

  <Proxy www.mydomain1.com:80>

    Order deny,allow

    Allow from all

  </Proxy>

  ProxyPass / http://localhost:8082/

  ProxyPassReverse / http://localhost:8082/

  ProxyPreserveHost On

</VirtualHost>

<VirtualHost *:80>

  ServerName www.mydomain2.com

  ServerAlias www.mydomain2.com

  ProxyRequests Off

  ErrorLog /var/log/apache/error-domain2.log

  <Directory proxy:http://www.mydomain12.com:80>

        Order Allow,Deny

        Allow from all

  </Directory>

  <Proxy www.mydomain2.com:80>

    Order deny,allow

    Allow from all

  </Proxy>

  ProxyPass / http://localhost:8084/

  ProxyPassReverse / http://localhost:8084/

  ProxyPreserveHost On

</VirtualHost>

Configure the server.xml in Tomcat . Add these values or if they are there ,just configure them.

<Executor name="tomcatThreadPool" namePrefix="catalina-exec-"
    maxThreads="250" minSpareThreads="40"/>




<Connector port="8083" protocol="HTTP/1.1"
           connectionTimeout="20000"
           redirectPort="8444"
           executor="tomcatThreadPool"
           proxyName="www.mydomain1.com"
           proxyPort="80"/>
<Connector port="8084" protocol="HTTP/1.1"
           connectionTimeout="20000"
           redirectPort="8445"
           executor="tomcatThreadPool"
           proxyName="www.mydomain2.com"
           proxyPort="80"/>


  <Host name="www.mydomain1.com" appBase="vhosts/mydomain1" unpackWARs="true"
        autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false">
            <Alias>mydomain1.com</Alias>
  </Host>
  <Host name="www.mydomain2.com" appBase="vhosts/mydomain2" unpackWARs="true"
        autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false">
            <Alias>mydomain2.com</Alias>
  </Host>