package main import ( "github.com/Sirupsen/logrus" ) var log = logrus.New() func init() { log.Formatter = new(logrus.JSONFormatter) log.Formatter = new(logrus.TextFormatter) // default } func main() { log.WithFields(logrus.Fields{ "animal": "walrus", "size": 10, }).Info("A group of walrus emerges from the ocean") log.WithFields(logrus.Fields{ "omg": true, "number": 122, }).Warn("The group's number increased tremendously!") log.WithFields(logrus.Fields{ "omg": true, "number": 100, }).Fatal("The ice breaks!") }