JANUS: Design of a software-defined infrastructure manager and its network control architecture

摘要

We present an integrated management architecture based on Software-Defined Infrastructure (SDI), an approach where an SDI Manager controls heterogeneous resources with a global view of the entire infrastructure. By exposing APIs on top of our SDI management system, we create a programmatic cloud environment where users can innovate, creating unique applications and services in a software-defined manner. In this paper we first provide an overview of the SDI manager, dubbed JANUS, that was developed and implemented in the SAVI testbed for application platforms. We focus on advanced software-defined network services that can be provided in this SDI environment. We present requirements that must be met by the SDI management system: Pro-active rule installation; Broadcast-free networking; VN creation and management; scalability and extensibility; and support for legacy networks. We describe the Network Control Module of the JANUS SDI Manager which was designed to meet the specified requirements. A key innovation that promotes scalability and performance is a FlowStore that tracks flows and cache rules in the SDN network.