add log fatal level (#1067)

log/helper.go

@@ -3,6 +3,7 @@ package log
 import (
 	"context"
 	"fmt"
+	"os"
 )
 
 // Helper is a logger helper.
@@ -89,3 +90,21 @@ func (h *Helper) Errorf(format string, a ...interface{}) {
 func (h *Helper) Errorw(keyvals ...interface{}) {
 	h.logger.Log(LevelError, keyvals...)
 }
+
+// Fatal logs a message at fatal level.
+func (h *Helper) Fatal(a ...interface{}) {
+	h.logger.Log(LevelFatal, "msg", fmt.Sprint(a...))
+	os.Exit(1)
+}
+
+// Fatalf logs a message at fatal level.
+func (h *Helper) Fatalf(format string, a ...interface{}) {
+	h.logger.Log(LevelFatal, "msg", fmt.Sprintf(format, a...))
+	os.Exit(1)
+}
+
+// Fatalw logs a message at fatal level.
+func (h *Helper) Fatalw(keyvals ...interface{}) {
+	h.logger.Log(LevelFatal, keyvals...)
+	os.Exit(1)
+}

log/level.go

@@ -17,6 +17,8 @@ const (
 	LevelWarn
 	// LevelError is logger error level.
 	LevelError
+	// LevelFatal is logger fatal level
+	LevelFatal
 )
 
 func (l Level) String() string {
@@ -29,6 +31,8 @@ func (l Level) String() string {
 		return "WARN"
 	case LevelError:
 		return "ERROR"
+	case LevelFatal:
+		return "FATAL"
 	default:
 		return ""
 	}
@@ -45,6 +49,8 @@ func ParseLevel(s string) Level {
 		return LevelWarn
 	case "ERROR":
 		return LevelError
+	case "FATAL":
+		return LevelFatal
 	}
 	return LevelInfo
 }