Logrus Bunyan Log Formatter

Logrus formatter mainly based on original logrus.JSONFormatter but with slightly modified output and support for bunyan.

Example

You can go to the examples/ directory and run this example on your own.

$ go run basic.go
{"animal":"walrus","hostname":"mumoshu","level":20,"msg":"Started observing beach","name":"myapp","number":8,"pid":77989,"prefix":"main","time":"2016-09-08T17:29:54+09:00","v":0}
{"animal":"walrus","hostname":"mumoshu","level":20,"msg":"[main] A group of walrus emerges from the ocean","name":"myapp","pid":77989,"size":10,"time":"2016-09-08T17:29:54+09:00","v":0}
{"hostname":"mumoshu","level":40,"msg":"[main] The group's number increased tremendously!","name":"myapp","number":122,"omg":true,"pid":77989,"time":"2016-09-08T17:29:54+09:00","v":0}
{"hostname":"mumoshu","level":30,"msg":"Temperature changes","name":"myapp","pid":77989,"prefix":"sensor","temperature":-4,"time":"2016-09-08T17:29:54+09:00","v":0}
{"animal":"orca","hostname":"mumoshu","level":"panic","msg":"It's over 9000!","name":"myapp","pid":77989,"prefix":"sensor","size":9009,"time":"2016-09-08T17:29:54+09:00","v":0}
{"hostname":"mumoshu","level":60,"msg":"[main] The ice breaks!","name":"myapp","number":100,"omg":true,"pid":77989,"time":"2016-09-08T17:29:54+09:00","v":0}
exit status 1

Now, as messages are compatible with bunyan, you can pipe those to bunyan cli like:

$ go run basic.go | bunyan -o short
exit status 1
08:29:59.000Z DEBUG myapp: Started observing beach (animal=walrus, number=8, prefix=main)
08:29:59.000Z DEBUG myapp: [main] A group of walrus emerges from the ocean (animal=walrus, size=10)
08:29:59.000Z  WARN myapp: [main] The group's number increased tremendously! (number=122, omg=true)
08:29:59.000Z  INFO myapp: Temperature changes (prefix=sensor, temperature=-4)
08:29:59.000Z LVLpanic myapp: It's over 9000! (animal=orca, prefix=sensor, size=9009)
08:29:59.000Z FATAL myapp: [main] The ice breaks! (number=100, omg=true)

Installation

To install formatter, use go get:

$ go get github.com/mumoshu/logrus-bunyan-formatter

Usage

Here is how it should be used:

package main

import (
	"github.com/Sirupsen/logrus"
	bunyan "github.com/mumoshu/logrus-bunyan-formatter"
)

var log = logrus.New()

func init() {
	log.Formatter = new(bunyan.Formatter)
	log.Level = logrus.DebugLevel
}

func main() {
	log.WithFields(logrus.Fields{
		"prefix": "main",
		"animal": "walrus",
		"number": 8,
	}).Debug("Started observing beach")

	log.WithFields(logrus.Fields{
		"prefix":      "sensor",
		"temperature": -4,
	}).Info("Temperature changes")
}

API

bunyan.Formatter exposes the following fields:

• TimestampFormat string — timestamp format to use for display when a full timestamp is printed.
• Name string — applicatio name to be included in each log message.

License

MIT