Awesome
go-logrus-formatters 
This repository contains a set of logrus formatters.
Installation
Since this project supports semver, preferred way of installation is through dep or gomodules:
dep ensure -add github.com/fabienm/go-logrus-formatters
or
go get github.com/fabienm/go-logrus-formatters
GELF formatter
The GELF formatter supports 1.1 payload specification.
Notable features:
- Logrus levels are converted to syslog levels
- Logrus entries times are converted to UNIX timestamps.
- Logrus entry fields are prefixed with
_, exceptedversion,host,short_message,full_message,timestampandlevel, allowing override.
Syslog level mapping
| Logrus | Syslog |
|---|---|
| Panic | EMERG (0) |
| Fatal | CRIT (2) |
| Error | ERR (3) |
| Warn | WARNING (4) |
| Info | INFO (6) |
| Debug | DEBUG (7) |
Usage
package main
import (
"os"
"github.com/fabienm/go-logrus-formatters"
log "github.com/sirupsen/logrus"
)
func init() {
hostname, _ := os.Hostname()
// Log as GELF instead of the default ASCII formatter.
log.SetFormatter(formatters.NewGelf(hostname))
}
func main() {
log.WithFields(log.Fields{
"animal": "walrus",
"size": 10,
}).Info("A group of walrus emerges from the ocean")
log.WithFields(log.Fields{
"full_message": "Backtrace here\n\nmore stuff",
"user_id": 9001,
"some_info": "foo",
"some_env_var": "bar",
}).Fatal("A short message that helps you identify what is going on")
}
Output:
{"_animal":"walrus","_level_name":"INFORMATIONAL","_size":10,"host":"mylaptop","level":6,"short_message":"A group of walrus emerges from the ocean","timestamp":1522937330.7570872,"version":"1.1"}
{"_some_env_var":"bar","_some_info":"foo","_user_id":9001,"_level_name":"CRITICAL","full_message":"Backtrace here\n\nmore stuff","host":"mylaptop","level":2,"short_message":"A short message that helps you identify what is going on","timestamp":1522937330.7573297,"version":"1.1"}