http://docs.openstack.org/developer/nova/devref/unit_tests.html
http://wiki.openstack.org/novaplugin
http://docs.openstack.org/essex/openstack-compute/admin/content/setting-up-services.html
http://wiki.openstack.org/DatabaseAsAService
http://joinfu.com/presentations/openstack-qa-processes/openstack-qa-processes.pdf
http://docs.openstack.org/trunk/openstack-compute/install/content/defining-services.html
http://blog.lightcloud.cn/?p=123
源码分析：
1. 视频资料：http://e.gensee.com/v_154692_2
2. http://wenku.baidu.com/view/db4b77631ed9ad51f01df286.html
3. http://hi.baidu.com/may0x11/item/1c8e51902fb18c1c934f4155
4. http://nujeix.sinaapp.com/?p=4
5. http://www.rhonabwy.com/wp/2011/07/07/inside-the-nova-service-framework/