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POTomcat deployment strategy
 

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    <p>This is a somewhat different question about Tomcat deployment. It has been covered partially by earlier questions but I would like to here from those who have actually done Tomcat deployments.</p> <p>In my organization I see two types of deployment.</p> <ol> <li><p>WAR deployment to Tomcat <em>webapps</em> dir. Tomcat is stopped, the existing WAR file is renamed, the existing app directory under webapps (<em>appBase</em>) is removed, the new WAR is copied in and Tomcat is restarted. The upside: deploying WARs seems to be understood by everyone. There are two downsides that I can see.<p> A. if the WAR contains deployment specific information, such as DB connect info, the development environment requires some sort of version and build control to make sure the correct deployment-specific information goes into a WAR file. This could get complicated.<p> B. Many steps, not difficult but each step is a potential point of error.</p></li> <li><p><em>appBase</em> points to the application file system, deployment-specific information kept elsewhere. The applications deployable file system or a WAR file is copied to a location on the Tomcat box. The appBase attribute for the application in Tomcats <em>Servlet.xml</em> is modified to point to the newly deployed code. Tomcat is restarted after the copy. All deployment specific config information is kept in a separate directory under [tomcat_root] that is not affected by the deployment. If any changes are required the edits can be made any time and Tomcat restarted to pick up the changes. The upside: dead simple, usually only one step, at most two steps The downside: file editing on the deployment machine may be required. This is not allowed in many production environments or must be done by a sys admin not the deployment person. May cause delays, political problems and finger pointing if something goes wrong.</p></li> </ol> <p>As I said above, I would like to hear real world experience with either method. I definitely favor the second method. I wonder what the attraction of the first is since it seems to be much more error prone.</p> <p>Thanks, -=b</p>
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