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(Overview: Added note about over-cloud vs. under-cloud)
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==== Design ====
==== Design ====
* [[Blueprinting Process (Marconi)|Blueprinting Process]]
* [[Server Architecture (Marconi)|Server Architecture]]
* [[Server Architecture (Marconi)|Server Architecture]]
* Reference Clients
* Reference Clients

Revision as of 16:06, 3 June 2014


Marconi is a cloud messaging and notification service for developers building applications on top of OpenStack. The service features a web-friendly HTTP API, which developers can use to send messages between the various components of their SaaS and mobile applications, using a variety of communication patterns. Underlying the API is an efficient messaging engine designed with scalability and security in mind.

At first glance, Marconi's RESTful API may seem a bit out of the ordinary. Message brokers typically rely on a custom binary protocol and long-lived connections. However, many of today's developers prefer a more web-friendly HTTP API. They value the simplicity and transparency of the protocol, its firewall-friendly nature, and its huge ecosystem of tools, load balancers and proxies. In addition, cloud operators appreciate the scalability aspects of the REST architectural style.

Marconi's primary mission is to provide a multi-tenant, web-friendly messaging and notifications service to so-called "over-cloud" web and mobile application developers. In addition, several projects have asked us to help with some of their under-cloud use cases, particularly in terms of aggregating and filtering events as a compliment to OpenStack's RPC layer (Marconi is not intended to replace oslo.messaging).

Additionally, several OpenStack programs have expressed interest in integrating with Marconi to surface events to end users and user-agents. We look forward to collaborating with these and other programs on their individual use cases:

  • Heat
  • Swift
  • Horizon
  • Guest Agent
  • Ceilometer


Marconi is in use today in private and public cloud deployments, most notably as the engine behind Rackspace Cloud Queues. With the close of the Icehouse cycle, the program has achieved a number of important milestones:

  • Marconi's first official, production-ready "1.0" release is now available for download. This first release includes a battle-tested MongoDB driver, and production-ready drivers for additional backends are in the works.
  • Marconi's v1.0 API is stable and ready to code against.
  • Basic user and operator docs are now available, and we will be adding tons of new content during Juno.
  • A reference client library (written in Python) is now available on PyPI which supports the entire v1.0 API. Support for other languages is available through Rackspace-supported SDKs.

The program has attracted a growing community of contributors from all over the world. We are particularly proud of our interns:

  • 10+ organizations represented
  • 5 core reviewers
  • 6 interns for Juno (representing GSoC, GNOME OPW, Rackspace and Red Hat)


The Marconi team hangs out in #openstack-marconi on Freenode. Feel free to stop in anytime to chat with us; the crew is always happy to hear your ideas and answer questions. If you run into a bug, please report it using our issue tracker.




  • Alejandro Cabrera. Rackspace Atlanta. Introducing Openstack Marconi. July 17, 2013. Youtube Speaker Deck
  • Flavio Percoco. EuroPython 2013. Marconi: Queuing and Notification Service for Openstack. July 2, 2013. YouTube
  • Kurt Griffiths, Allan Metts. Openstack Summit April 2013. Project Overview: OpenStack Queuing and Notification Service ("Marconi""). April 2013. YouTube
  • Kurt Griffiths, Flavio Percoco, Allan Metts. Openstack Summit November 2013. Openstack Queuing and Notification Service. November 2013. YouTube


Contributor Guide

Note: The Marconi team is reworking this section of the wiki with tons of updated content, so some pages are missing or incomplete at the moment. If you can't find the information you are looking for, please drop us a line in IRC (#openstack-marconi) and we'll be happy to help.

Getting Started

API Specs


Quality Engineering