Hi guys, At last AWS conference, I met with a engineer who was using HAProxy to load-balance IoT devices through HAProxy using MQTT protocol and he was complaining about the poor performance of the server with 10k of devices just get reconnecting. He pointed SSL performance but also authentication (validation of username / password).
So I wrote a small MQTT library for HAProxy which allows parsing the MQTT CONNECT message, the very first one being sent by a client. The library allows the following: * validation of the message (through a converter) * fetch any field from the connect message (client id, username, password, etc...) for fun and profit (routing, persistence, rate or concurrent connection enforcement, etc...) * write your own authentication validation module on top of HAProxy The code is there, including some HAProxy configuration examples: https://github.com/bedis/haproxy_mqtt_lua I hope this will be useful to some of you. I am planning to write in native C the converter and the fetch above. Baptiste
