Date Added: Feb 2011
Infrastructure as a Service (IaaS) is one of the provisioning models for Clouds as defined in the NIST Clouds definition. Although widely used, current IaaS implementations and solutions doesn't have common and well defined architecture model. The paper attempts to define a generic architecture for IaaS based on current research by authors in developing novel architectural framework for Infrastructure Services On-Demand (ISOD) provisioning that is originated from the telecommunication and networking area and allows for combined network and IT resources provisioning. The paper proposes the Composable Services Architecture (CSA) for dynamically configurable virtualised services. The proposed CSA includes such important component as the Services Delivery Framework (CSA SDF) that defines the services provisioning workflow and supporting infrastructure for provisioned services lifecycle management.