VerneMQ: A Distributed MQTT Broker

VerneMQ is an Apache2 licensed distributed MQTT broker, developed in Erlang.

MQTT used to stand for MQ Telemetry Transport, but it no longer is an acronym. It is an extremely simple and lightweight publish/subscribe messaging protocol, that was invented at IBM and Arcom (now Eurotech) to connect restricted devices in low bandwidth, high-latency or unreliable networks.

VerneMQ implements the MQTT 3.1 and 3.1.1 specifications, integration of MQTT-SN is planned. Currently the following features are implemented:

• QoS 0, QoS 1, QoS 2
• Basic Authentication and Authorization
• Bridge Support
• $SYS Tree for monitoring and reporting
• TLS (SSL) Encryption
• Dynamic Topics
• Websockets Support
• Cluster Support
• SNMP Monitoring
• Logging (Console, Files, Syslog)
• Reporting to Graphite
• Extensible Plugin architecture
• Multiple Sessions per ClientId
• Session Balancing
• Message load regulation
• Message load shedding (for system protection)
• Offline Message Storage (based on LevelDB)
• Queue can handle messages FIFO or LIFO style.

Where to find more

Below you'll find a basic introduction to building and starting VerneMQ. For more information about the binary package installation, configuration, and administration of VerneMQ, please visit our documentation at VerneMQ Documentation or checkout the product page VerneMQ if you require more information on the available support options.

Quick Start

This section assumes that you have a copy of the VerneMQ source tree. To get started, you need to first build VerneMQ.

Building VerneMQ

Note: VerneMQ requires Erlang 17.x to be installed on your system. Erlang 18 is currently not supported.

Assuming you have a working Erlang installation, building VerneMQ should be as simple as:

$ cd $VERNEMQ
$ make rel

Starting VerneMQ

Once you've successfully built VerneMQ, you can start the server with the following commands:

$ cd $VERNEMQ/_build/default/rel/vernemq
$ bin/vernemq start

Note that the $VERNEMQ/_build/default/rel/vernemq directory is a complete, self-contained instance of VerneMQ and Erlang. It is strongly suggested that you move this directory outside the source tree if you plan to run a production instance.

Important links

• #vernemq on freenode IRC
• VerneMQ User Mailing List
• VerneMQ Documentation
• Follow us on Twitter (@vernemq)!