A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Requirements and Design Patterns for REST Northbound API in SDN
Authors : Li Li
Wei Zhou
Min Luo
Wu Chou
Filename : draft-li-sdnrg-design-restapi-00.txt
Pages : 21
Date : 2015-03-30
Abstract:
As stated in ONF SDN Architecture WG Charter [Arc2013], in the SDN
architecture, the control and data planes are decoupled, network
intelligence and state are logically centralized, and the underlying
network infrastructure is abstracted from the applications. As a
result, network operators gain programmability, automation, and
network control, enabling them to build highly scalable, flexible
networks that readily adapt to changing business needs. In this
architecture, the Northbound API provides interfaces to the external
components where applicable.
As REST architectural style has gained more popularity in
implementing loosely-coupled systems, RESTful services are becoming
the style of choice for SDN Northbound API and gaining increasingly
importance in SDN architecture, for example, the Floodlight
[Floodlight] has a Northbound API based on REST.
However, despite the recent advances made on RESTful web services,
there is a lack of guidelines for designing RESTful networking
protocols and communication web services, especially based on the
Resource-Oriented Architecture (ROA) that further refines the REST
principles. Many networking protocols that claim to be REST APIs are
not hypertext driven as prescribed by REST. This situation can lead
to REST networking APIs that are not as scalable, extensible,
maintainable, and interoperable as promised by REST.
This document describes the key rules and design patterns for the
SDN Northbound API in a truly RESTful manner, based on our
experiences with REST API designs in general and SDN Northbound API
design in particular. The rules and the design patterns illustrate
the solutions to the common API problems in REST API designs, using
the network virtualization API of OpenStack as an example.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-li-sdnrg-design-restapi/
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-li-sdnrg-design-restapi-00
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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