package main import ( "github.com/sirupsen/logrus" prefixed "github.com/x-cray/logrus-prefixed-formatter" ) var log = logrus.New() func init() { formatter := new(prefixed.TextFormatter) log.Formatter = formatter log.Level = logrus.DebugLevel } func main() { defer func() { err := recover() if err != nil { // Fatal message log.WithFields(logrus.Fields{ "omg": true, "number": 100, }).Fatal("[main] The ice breaks!") } }() // You could either provide a map key called `prefix` to add prefix log.WithFields(logrus.Fields{ "prefix": "main", "animal": "walrus", "number": 8, }).Debug("Started observing beach") // Or you can simply add prefix in square brackets within message itself log.WithFields(logrus.Fields{ "animal": "walrus", "size": 10, }).Debug("[main] A group of walrus emerges from the ocean") // Warning message log.WithFields(logrus.Fields{ "omg": true, "number": 122, }).Warn("[main] The group's number increased tremendously!") // Information message log.WithFields(logrus.Fields{ "prefix": "sensor", "temperature": -4, }).Info("Temperature changes") // Panic message log.WithFields(logrus.Fields{ "prefix": "sensor", "animal": "orca", "size": 9009, }).Panic("It's over 9000!") }