How to deploy multiple Grails apps on one Tomcat + Apache?

Question

I\'ve read the several questions on StackOverflow and googled several hours but I can\'t find a complete and clear answer to my problem of deploying multiple Grails apps on one

Answer 1

I struggled with this a while back and managed to get something that works ok. It doesn't use mod_jk though, I opted for mod_proxy. I also had a slightly different set up in Tomcat (mine is version 6 btw), where I added multiple connectors as well as the Host declarations you have.

Try the following -

In tomcat server.xml:

<!-- I opted for a shared thread pool so both apps share same resources - optional -->
<Executor name="tomcatThreadPool" namePrefix="catalina-exec-"
    maxThreads="250" minSpareThreads="40"/>


<Connector port="8081" protocol="HTTP/1.1"
           connectionTimeout="20000"
           redirectPort="8444"
           executor="tomcatThreadPool"
           proxyName="www.domain1.com"
           proxyPort="80"/>
<Connector port="8082" protocol="HTTP/1.1"
           connectionTimeout="20000"
           redirectPort="8445"
           executor="tomcatThreadPool"
           proxyName="www.domain2.com"
           proxyPort="80"/>

  <Host name="www.domain1.com" appBase="vhosts/domain1" unpackWARs="true"
        autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false">
            <Alias>domain1.com</Alias>
  </Host>
  <Host name="www.domain2.com" appBase="vhosts/domain2" unpackWARs="true"
        autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false">
            <Alias>domain2.com</Alias>
  </Host>

In Apache:

<VirtualHost *:80>
  ServerName www.domain1.com
  ServerAlias www.domain1.com

  ProxyRequests Off

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

  <Directory proxy:http://www.domain1.com:80>
        Order Allow,Deny
        Allow from all
  </Directory>

  <Proxy www.domain1.com:80>
    Order deny,allow
    Allow from all
  </Proxy>
  ProxyPass / http://localhost:8081/
  ProxyPassReverse / http://localhost:8081/
  ProxyPreserveHost On
</VirtualHost>

<VirtualHost *:80>
  ServerName www.domain2.com
  ServerAlias www.domain2.com

  ProxyRequests Off

  ErrorLog /var/log/apache2/error-domain2.log

  <Directory proxy:http://www.domain2.com:80>
        Order Allow,Deny
        Allow from all
  </Directory>

  <Proxy www.domain2.com:80>
    Order deny,allow
    Allow from all
  </Proxy>
  ProxyPass / http://localhost:8082/
  ProxyPassReverse / http://localhost:8082/
  ProxyPreserveHost On
</VirtualHost>

Make sure mod_proxy is enable for your Apache server. It was a while ago when I got this working, so I'm sure if everything is needed in that config - once I get it working I tend to forget stuff :)

Hope that helps, Chris.

Answer 2

we have two Grails Web App running in production under the same tomcat

That was easy to do with tomcat 6

The difference I see with your server.xml is the name of the apps here what we have :

<Host name="www.domain1.com" appBase="[tomcat_root_dir]/www.domain1.com/webapps" unpackWARs="true"
    autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false">
</Host>
<Host name="www.domain2.com" appBase="[tomcat_root_dir]/www.domain2/webapps" unpackWARs="true"
    autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false">
</Host>

Then we have two directories domain1.com and domain2.com in tomcat root dir In each directory, we have a webapps dir which holds only a ROOT.war file for each app

Hope that helps

Cheers

Grooveek