I've just committed a load balancing demo I've had knocking around for a bit [1]. It balances HTTP based service calls across tomcat servers configured with an SCA enabled webapp. It's a work in progress and there are a couple of points I need some help with....
1 - There are currently manual steps involved in getting it running. I set it up using the fairly well trodden Apache -> mod_jk -> Tomcat route. I've automated the creation and configuration of the tomcat instances but obviously doing the same for Apache is more tricky. Thinking I was being smart this week I replaced Apace with the old "balancer" webapp from tomcat 5 days and wrote a round robin rule. However this all fell apart as the balancer webapp is based on HTTP redirects and Axis2 doesn't handle them. Had this worked I had a completely Java demo and I could run the whole thing automatically. So any thoughts on either A) how to automate Apache installs B) a tomcat based load balancer. 2 - I'm planning to upgrade the app to make it one part of a distributed domain. In particular I want to demonstrate how to configure the nodes in the cloud to reference the tomcat cluster generally rather than the individual node as logically a composite is deployed to a cluster rather than all the nodes in a cluster. A conversation has started [2] about what a webapp means in a distributed domain so comments on that thread would be useful to this exercise also. Regards Simon [1] http://svn.apache.org/repos/asf/incubator/tuscany/java/sca/demos/load-balancing-webapp/ [2] http://www.mail-archive.com/tuscany-dev%40ws.apache.org/msg31031.html
