MQTT

The MQTT input plugin, allows to retrieve messages/data from MQTT control packets over a TCP connection. The incoming data to receive must be a JSON map.

Configuration Parameters

The plugin supports the following configuration parameters:

Getting Started

In order to start listening for MQTT messages, you can run the plugin from the command line or through the configuration file:

Command Line

Since the MQTT input plugin let Calyptia Fluent Bit behave as a server, we need to dispatch some messages using some MQTT client, in the following example mosquitto tool is being used for the purpose:

$ calyptia-fluent-bit -i mqtt -t data -o stdout -m '*'
Calyptia Fluent Bit 20.10.03
 

[2016/05/20 14:22:52] [ info] starting engine
[0] data: [1463775773, {"topic"=>"some/topic", "key1"=>123, "key2"=>456}]

The following command line will send a message to the MQTT input plugin:

$ mosquitto_pub  -m '{"key1": 123, "key2": 456}' -t some/topic

Configuration File

In your main configuration file append the following Input & Output sections:

[INPUT]
    Name   mqtt
    Tag    data
    Listen 0.0.0.0
    Port   1883

[OUTPUT]
    Name   stdout
    Match  *

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