Auto-Deploying to Tomcat from CruiseControl with Maven
We have a web project that gets built using Maven; it was relatively simple to get this running under CruiseControl since CC has pretty good Maven2 support. However, we also wanted to have a successful build actually deployed to a Tomcat somewhere at a known location so that people could always check out the latest version.
I played around with various maven plugins for working with Tomcat, but had a really hard time getting them to work properly. Then I realized, even if I got the maven plugins working, I would need to do something else, because we run into PermGen errors on our Tomcats when we undeploy/redeploy, so we’d actually need to do an undeploy/restart-tomcat/deploy loop instead. Of course, none of the tomcat plugins can do the restart-tomcat bit (they can shut it down, but because they interact with the tomcat management interface, they can’t actually start it up again!).
So, I went back down the script route. I wrote this script which can do the undeploy/restart/redeploy loop:
#!/bin/sh unset DISPLAY export CATALINA_HOME=/usr/local/lib/apache-tomcat-5.5.17 export JAVA_HOME=/usr/java/jdk1.5.0_09 TOMCAT_ADMIN_USER=admin TOMCAT_ADMIN_PWD=XXXXXXXX TOMCAT_PORT=13080 CC_HOME=/usr/local/lib/cruisecontrol-bin-2.6.2 CC_BUILD=$CC_HOME/checkout/trunk # undeploy old WAR, if any ( echo "--silent" echo "--user $TOMCAT_ADMIN_USER:$TOMCAT_ADMIN_PWD" echo "--url http://localhost:$TOMCAT_PORT/manager/html/undeploy?path=/" ) | \ curl --config - > /dev/null # stop the tomcat (cd $CATALINA_HOME; bin/shutdown.sh) # pause to wait for shutdown sleep 5 # restart the tomcat (cd $CATALINA_HOME; bin/startup.sh) # drop the WAR in place cp $CC_BUILD/webapp/target/ROOT.war $CATALINA_HOME/webapps
This assumes that you have the tomcat installed in the given
CATALINA_HOME with the manager app enabled and set up with the
appropriate admin credentials, and that the build directory for the CC
project is in the
trunk/webapp directory. Note also that we’re
deploying to the root context, so you will want to modify your
undeploy URL if that’s different.
The last step is to add the following CC project; assuming we have an existing “webapp” CC project in existence:
<project name="webapp-tomcat" buildafterfailed="false"> <modificationset> <buildstatus logdir="logs/webapp"/> </modificationset> <schedule interval="60"> <exec command="/home/cruise/bin/redeploy" timeout="60"/> </schedule> </project>
This triggers off a successful CC build of “webapp” and just calls the script we wrote above. Nice and easy.