On one Apache server I am running multiple tomcat installations, each one
serves a seperate virtual host. This is considered an advanced use case and is
not very well documented for JK2, so I thought I would pass this along.
I run Apache 2.0.43, TC 4.1.18, and mod_jk2 out of process over
regular sockets.
This config would be good for the ISP model - each host gets private JVM.
Or in my case, I provide seperate development, test, and production
tomcat servers. This allows me to migrate code changes.
Either case, contexts only load for specific hosts and a JVM can go up/down
without effecting other hosts.
Neither tomcat installation uses the value of the environment variable
CATALINA_HOME, rather I explicitly set in shell scripts for each tomcat.
Otherwise they both try to start the same server. I found this out because
I still had tomcat 4.0.6 on my box and when I ran my 4.1.8 startup script, that
it launched 4.0.6 using default env! My second tomcat 4.1.8 got a BindException
of course when it tried to also start 4.0.6 using default env.
Lesson learned - So now each tomcat gets hard coded env CATALINA_HOME.
Here are my config files for regular sockets:
Note:
/jkstatus loads only into the default server
/someApp loads only into fred.com
/anotherApp loads only into wilma.com
Of course, fred and wilma server.xml get diferrent shutdown ports also.
----------------------------------------------------------
workers2.properties
----------------------------------------------------------
# TYPE:NAME.PROPERTY=VALUE
# OR
# [TYPE:NAME]
# PROPERTY=VALUE
[logger]
level=DEBUG
[config:]
file=${serverRoot}/conf/workers2.properties
debug=2
debugEnv=0
[uriMap:]
info=Maps the requests. Options: debug
debug=4
#the shared memory depository
[shm:]
info=Scoreboard.
file=${serverRoot}/logs/jk2.shm
size=1000000
debug=0
disabled=0
[workerEnv]
info=global options
timing=1
debug=0
[lb:lb]
info=the default load balancer
debug=0
[channel.socket:fred]
info=ajp13 forwarding to fred.com JVM
debug=0
tomcatId=fred
port=8019
host=localhost
[channel.socket:wilma]
info=ajp13 forwarding to wilma.com JVM
debug=0
tomcatId=wilma
port=9019
host=localhost
[ajp13:fred]
channel=channel.socket:fred
tomcatId=fred
[ajp13:wilma]
channel=channel.socket:wilma
tomcatId=wilma
[status:]
info=status worker
# default host mapping
[uri:/jkstatus/*]
group=status
# fred.com context mappping
[uri:fred.com/someApp]
group=ajp13:fred
context=/someApp
# fred.com uri mapping
[uri:fred.com/someApp/*]
group=ajp13:fred
# wilma.com context mappping
[uri:wilma.com/anotherApp]
group=ajp13:wilma
context=/anotherApp
# wilma.com uri mappping
[uri:wilma.com/anotherApp/*]
group=ajp13:wilma
------------------------------------------------
jk2.properties - fred installation of tomcat
-----------------------------------------------
handler.list=channelSocket,request
channelSocket.port=8019
------------------------------------------------
jk2.properties - wilma installation of tomcat
-----------------------------------------------
handler.list=channelSocket,request
channelSocket.port=9019
---------------------------------------------------
server.xml - fred instance of tomcat
--------------------------------------------------
<Server port="8005" shutdown="SHUTDOWN" debug="4">
<Service name="Tomcat-Apache-fred">
<Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
port="8019" minProcessors="5" maxProcessors="75"
enableLookups="true" appBase="webapps"
acceptCount="10" debug="4"
protocolHandlerClassName="org.apache.jk.server.JkCoyoteHandler"/>
<Engine className="org.apache.catalina.core.StandardEngine"
name="Apache" debug="4" defaultHost="fred.com">
<Host name="fred.com" debug="4"
appBase="webapps" unpackWARs="true">
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="fred-apache_log." suffix=".txt" timestamp="true"/>
<Context path="" docBase="ROOT" debug="4"/>
<Realm className="org.apache.catalina.realm.MemoryRealm" />
</Host>
</Engine>
</Service>
</Server>
---------------------------------------------------
server.xml - wilma instance of tomcat
--------------------------------------------------
<Server port="9005" shutdown="SHUTDOWN" debug="4">
<Service name="Tomcat-Apache-wilma">
<Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
port="9019" minProcessors="5" maxProcessors="75"
enableLookups="true" appBase="webapps"
acceptCount="10" debug="4"
protocolHandlerClassName="org.apache.jk.server.JkCoyoteHandler"/>
<Engine className="org.apache.catalina.core.StandardEngine"
name="Apache" debug="4" defaultHost="wilma.com">
<Host name="wilma.com" debug="4"
appBase="webapps" unpackWARs="true">
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="wilma-apache_log." suffix=".txt" timestamp="true"/>
<Context path="" docBase="ROOT" debug="4"/>
<Realm className="org.apache.catalina.realm.MemoryRealm" />
</Host>
</Engine>
</Service>
</Server>
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