Create multiple Tomcat instances for the same installation

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03/21/2010: Posts:
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December 29, 2011 13:31:44 Last update: December 29, 2011 14:29:13

Tomcat allows you to create multiple server instances for the same installation. The installation directory is identified as CATALINA_HOME, the instance directory is identified as CATALINA_BASE. Here are the steps:

Create a base directory for the new instance, for example: /home/nogeek/tomcat1.

Create the subdirectories:

mkdir -p /home/nogeek/tomcat/{bin,conf,logs,temp,webapps,work}

Copy web.xml from the installation directory:

cp $CATALINA_HOME/conf/web.xml /home/nogeek/tomcat1/conf/

Copy logging.properties from the installation directory:

cp $CATALINA_HOME/conf/logging.properties /home/nogeek/tomcat1/conf/

Create server.xml under tomcat1/conf:

<?xml version='1.0' encoding='utf-8'?>
<Server port="8085" shutdown="SHUTDOWN">
  <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="off"/>
  <Listener className="org.apache.catalina.core.JasperListener"/>
  <!-- Prevent memory leaks due to use of particular java/javax APIs-->
  <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener"/>
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"/>
  <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener"/>

  <Service name="Catalina">
    <Connector port="8088" protocol="HTTP/1.1" 
	       URIEncoding="UTF-8"
               connectionTimeout="20000" 
               redirectPort="8443" />

    <Engine name="Catalina" defaultHost="localhost">
      <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
	<Valve className="org.apache.catalina.valves.AccessLogValve" 
	       directory="logs"
               prefix="localhost_access_log." 
	       suffix=".txt"
               pattern="%h %l %u %t &quot;%r&quot; %s %b" />
      </Host>
    </Engine>
  </Service>
</Server>

Create script setenv.sh under tomcat1/bin:

# Edit this file to set custom options
# Tomcat accepts two parameters JAVA_OPTS and CATALINA_OPTS
# JAVA_OPTS are used during START/STOP/RUN
# CATALINA_OPTS are used during START/RUN
JAVA_HOME="/usr/java"
AGENT_PATHS=""
JAVA_AGENTS=""
JAVA_LIBRARY_PATH=""
CLASSPATH=""
JVM_OPTS="-Xmx512M -Xss192K -XX:MaxPermSize=256m -Djava.awt.headless=true"
JAVA_OPTS="$JVM_OPTS $AGENT_PATHS $JAVA_AGENTS $JAVA_LIBRARY_PATH"

Copy startup.sh and shutdown.sh from the installation directory. Add the following two lines to the beginning of each:
```
CATALINA_BASE=/home/nogeek/tomcat1
export CATALINA_BASE
```

Create a soft link for catalina.sh in tomcat1/bin:

$ ln -s ~/apache-tomcat-7.0.22/bin/catalina.sh catalina.sh

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Create multiple Tomcat instances for the same installation