Openstack通过Nova API创建卷

I'm trying to build a small webapp that will handle our development environments located on an openstack infrastructure (version 2012.2.2-dev, bundled in ubuntu 12.04) and I need to create some volumes using the API (i decided to use openstack rest api). I'm able to start machines and do some other operations (everything is built based on this: I'm trying to build a small webapp that will ha