Especially for Meng, Check out the pdf at: http://jenkins.cloudstack.org/job/docs-4.3-clients-wrappers-guide/
There is some basic apache whirr docs, that I tested on cloudstack. I also entered a bug on whirr at: https://issues.apache.org/jira/browse/WHIRR-725 A fix should be in jclouds 1.6.1 and once it gets releases the trunk of whirr should use jclouds 1.6.1. Hopefully this will fix it. However you should dive into jclouds, understand how it supports cloudstack, then see how whirr uses it. thanks, -sebastien
