SyslogHook

hooks/syslog/syslog.go

@@ -0,0 +1,61 @@
+package logrus_syslog
+
+import (
+	"os"
+	"fmt"
+	"log/syslog"
+	"github.com/Sirupsen/logrus"
+)
+
+// SyslogHook to send logs via syslog.
+type SyslogHook struct{
+	Writer			*syslog.Writer
+	SyslogNetwork	string
+	SyslogRaddr		string
+}
+
+// Creates a hook to be added to an instance of logger. This is called with
+// `hook, err := NewSyslogHook("udp", "localhost:514", syslog.LOG_DEBUG, "")`
+// `if err == nil { log.Hooks.Add(hook) }`
+func NewSyslogHook(network, raddr string, priority syslog.Priority, tag string) (*SyslogHook, error) {
+	w, err := syslog.Dial(network, raddr, priority, tag)
+	return &SyslogHook{w, network, raddr}, err
+}
+
+func (hook *SyslogHook) Fire(entry *logrus.Entry) error {
+	reader, err := entry.Reader()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Unable to read entry, %v", err)
+		return err
+	}
+
+	line := reader.String()
+
+	switch entry.Data["level"] {
+	case "panic":
+		return hook.Writer.Crit(line)
+	case "fatal":
+		return hook.Writer.Crit(line)
+	case "error":
+		return hook.Writer.Err(line)
+	case "warn":
+		return hook.Writer.Warning(line)
+	case "info":
+		return hook.Writer.Info(line)
+	case "debug":
+		return hook.Writer.Debug(line)
+	default:
+		return nil
+	}
+}
+
+func (hook *SyslogHook) Levels() []logrus.Level {
+	return []logrus.Level{
+		logrus.Panic,
+		logrus.Fatal,
+		logrus.Error,
+		logrus.Warn,
+		logrus.Info,
+		logrus.Debug,
+	}
+}

hooks/syslog/syslog_test.go

@@ -0,0 +1,26 @@
+package logrus_syslog
+
+import (
+	"testing"
+	"log/syslog"
+	"github.com/Sirupsen/logrus"
+)
+
+func TestLocalhostAddAndPrint(t *testing.T) {
+	log			:= logrus.New()
+	hook, err 	:= NewSyslogHook("udp", "localhost:514", syslog.LOG_INFO, "")
+
+	if err != nil {
+		t.Errorf("Unable to connect to local syslog.")
+	}
+
+	log.Hooks.Add(hook)
+
+	for _, level := range hook.Levels() {
+		if len(log.Hooks[level]) != 1 {
+			t.Errorf("SyslogHook was not added. The length of log.Hooks[%v]: %v", level, len(log.Hooks[level]))
+		}
+	}
+
+	log.Info("Congratulations!")
+}