This is an Logrus Hook which can send log message to MQTT server with operator friendly topic manner.

package main

import (
     "github.com/Sirupsen/logrus"

     "github.com/shirou/logrusmqtt"
)

func main() {
     log := logrus.New()

     p := logrusmqtt.MQTTHookParams{
             Hostname: "test.mosquitto.org",
             Topic:    "logrusmqtt/test/error",
     }

     hook, err := logrusmqtt.NewMQTTHook(p, logrus.DebugLevel)
     if err != nil {
             panic(err)
     }
     log.Hooks.Add(hook)

     log.Info("Info message")

     log.WithFields(logrus.Fields{
             "name": "joe",
             "age":  42,
     }).Error("Error Message with fields")
}

And the output from MQTT server is,

{"time":"2014-12-25T02:29:54.140874274Z","level":"info","msg":"Info message","data":{}}
{"time":"2014-12-25T02:29:54.141082554Z","level":"error","msg":"Error Message with fields","data":{"age":42,"name":"joe"}}

messages are published to topic + / + level topic.

If you set a topic as logrusmqtt/log and pass to NewMQTTHook,

• info level log be sent to logrusmqtt/log/info
• error level log will be sent to logrusmqtt/log/error

You can subscribe any specific log level. Or if you want to get any of log message, just subscrib logrusmqtt/log/#.

To create MQTTHook, use MQTTHookParams{} with any MQTT paramerers.

type MQTTHookParams struct {
     Hostname   string
     Port       int
     Username   string
     Password   string
     QoS        int
     Topic      string
     Retain     bool
     ClientId   string
     CAFilepath string
     Insecure   bool
}

Only Topic and Hostname are required. Others are optional.