syslog.go

Documentation: github.com/sirupsen/logrus/hooks/syslog

     1  // +build !windows,!nacl,!plan9
     2  
     3  package syslog
     4  
     5  import (
     6  	"fmt"
     7  	"log/syslog"
     8  	"os"
     9  
    10  	"github.com/sirupsen/logrus"
    11  )
    12  
    13  // SyslogHook to send logs via syslog.
    14  type SyslogHook struct {
    15  	Writer        *syslog.Writer
    16  	SyslogNetwork string
    17  	SyslogRaddr   string
    18  }
    19  
    20  // Creates a hook to be added to an instance of logger. This is called with
    21  // `hook, err := NewSyslogHook("udp", "localhost:514", syslog.LOG_DEBUG, "")`
    22  // `if err == nil { log.Hooks.Add(hook) }`
    23  func NewSyslogHook(network, raddr string, priority syslog.Priority, tag string) (*SyslogHook, error) {
    24  	w, err := syslog.Dial(network, raddr, priority, tag)
    25  	return &SyslogHook{w, network, raddr}, err
    26  }
    27  
    28  func (hook *SyslogHook) Fire(entry *logrus.Entry) error {
    29  	line, err := entry.String()
    30  	if err != nil {
    31  		fmt.Fprintf(os.Stderr, "Unable to read entry, %v", err)
    32  		return err
    33  	}
    34  
    35  	switch entry.Level {
    36  	case logrus.PanicLevel:
    37  		return hook.Writer.Crit(line)
    38  	case logrus.FatalLevel:
    39  		return hook.Writer.Crit(line)
    40  	case logrus.ErrorLevel:
    41  		return hook.Writer.Err(line)
    42  	case logrus.WarnLevel:
    43  		return hook.Writer.Warning(line)
    44  	case logrus.InfoLevel:
    45  		return hook.Writer.Info(line)
    46  	case logrus.DebugLevel, logrus.TraceLevel:
    47  		return hook.Writer.Debug(line)
    48  	default:
    49  		return nil
    50  	}
    51  }
    52  
    53  func (hook *SyslogHook) Levels() []logrus.Level {
    54  	return logrus.AllLevels
    55  }
    56
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