Created
May 25, 2017 15:05
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Logrus - Writes logs with level greater than error to stderr and all others (errors included) to a file in json format
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package main | |
import ( | |
"fmt" | |
"os" | |
log "github.com/sirupsen/logrus" | |
) | |
type MyHook struct{} | |
func (h *MyHook) Levels() []log.Level { | |
return []log.Level{ | |
log.WarnLevel, | |
log.ErrorLevel, | |
log.FatalLevel, | |
log.PanicLevel, | |
} | |
} | |
var fmter = new(log.TextFormatter) | |
func (h *MyHook) Fire(entry *log.Entry) (err error) { | |
line, err := fmter.Format(entry) | |
if err == nil { | |
fmt.Fprintf(os.Stderr, string(line)) | |
} | |
return | |
} | |
func init() { | |
log.SetFormatter(&log.JSONFormatter{}) | |
f, err := os.OpenFile( | |
"./log", | |
os.O_APPEND|os.O_WRONLY|os.O_CREATE, | |
0600) | |
if err != nil { | |
panic(err) | |
} | |
log.SetOutput(f) | |
log.AddHook(&MyHook{}) | |
} | |
func main() { | |
log.WithFields(log.Fields{ | |
"animal": "walrus", | |
"size": 10, | |
}).Debug("A group of walrus emerges from the ocean") | |
log.WithFields(log.Fields{ | |
"animal": "walrus", | |
"size": 10, | |
}).Info("A group of walrus emerges from the ocean") | |
log.WithFields(log.Fields{ | |
"animal": "walrus", | |
"size": 10, | |
}).Info("A group of walrus emerges from the ocean") | |
log.WithFields(log.Fields{ | |
"omg": true, | |
"number": 122, | |
}).Warn("The group's number increased tremendously!") | |
log.WithFields(log.Fields{ | |
"omg": true, | |
"number": 122, | |
}).Warn("The group's number increased tremendously!") | |
log.WithFields(log.Fields{ | |
"omg": true, | |
"number": 122, | |
}).Warn("The group's number increased tremendously!") | |
log.WithFields(log.Fields{ | |
"omg": true, | |
"number": 100, | |
}).Fatal("The ice breaks!") | |
} |
Author
cirocosta
commented
May 25, 2017
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