diff --git a/logger/logger.go b/logger/logger.go
index e2d5711f..8e808653 100644
--- a/logger/logger.go
+++ b/logger/logger.go
@@ -17,43 +17,79 @@ type Logger interface {
 	// Fields set fields to always be logged
 	Fields(fields map[string]interface{}) Logger
 	// Info level message
-	Info(msg string, args ...interface{})
+	Info(args ...interface{})
 	// Trace level message
-	Trace(msg string, args ...interface{})
+	Trace(args ...interface{})
 	// Debug level message
-	Debug(msg string, args ...interface{})
+	Debug(args ...interface{})
 	// Warn level message
-	Warn(msg string, args ...interface{})
+	Warn(args ...interface{})
 	// Error level message
-	Error(msg string, args ...interface{})
+	Error(args ...interface{})
 	// Fatal level message
-	Fatal(msg string, args ...interface{})
+	Fatal(args ...interface{})
+	// Infof level message
+	Infof(msg string, args ...interface{})
+	// Tracef level message
+	Tracef(msg string, args ...interface{})
+	// Debug level message
+	Debugf(msg string, args ...interface{})
+	// Warn level message
+	Warnf(msg string, args ...interface{})
+	// Error level message
+	Errorf(msg string, args ...interface{})
+	// Fatal level message
+	Fatalf(msg string, args ...interface{})
 	// String returns the name of logger
 	String() string
 }
 
-func Info(msg string, args ...interface{}) {
-	DefaultLogger.Info(msg, args...)
+func Info(args ...interface{}) {
+	DefaultLogger.Info(args...)
 }
 
-func Error(msg string, args ...interface{}) {
-	DefaultLogger.Error(msg, args...)
+func Error(args ...interface{}) {
+	DefaultLogger.Error(args...)
 }
 
-func Debug(msg string, args ...interface{}) {
-	DefaultLogger.Debug(msg, args...)
+func Debug(args ...interface{}) {
+	DefaultLogger.Debug(args...)
 }
 
-func Warn(msg string, args ...interface{}) {
-	DefaultLogger.Warn(msg, args...)
+func Warn(args ...interface{}) {
+	DefaultLogger.Warn(args...)
 }
 
-func Trace(msg string, args ...interface{}) {
-	DefaultLogger.Trace(msg, args...)
+func Trace(args ...interface{}) {
+	DefaultLogger.Trace(args...)
 }
 
-func Fatal(msg string, args ...interface{}) {
-	DefaultLogger.Fatal(msg, args...)
+func Fatal(args ...interface{}) {
+	DefaultLogger.Fatal(args...)
+}
+
+func Infof(msg string, args ...interface{}) {
+	DefaultLogger.Infof(msg, args...)
+}
+
+func Errorf(msg string, args ...interface{}) {
+	DefaultLogger.Errorf(msg, args...)
+}
+
+func Debugf(msg string, args ...interface{}) {
+	DefaultLogger.Debugf(msg, args...)
+}
+
+func Warnf(msg string, args ...interface{}) {
+	DefaultLogger.Warnf(msg, args...)
+}
+
+func Tracef(msg string, args ...interface{}) {
+	DefaultLogger.Tracef(msg, args...)
+}
+
+func Fatalf(msg string, args ...interface{}) {
+	DefaultLogger.Fatalf(msg, args...)
 }
 
 func V(level Level) bool {
diff --git a/logger/logger_test.go b/logger/logger_test.go
index 10f0b0c2..02982f19 100644
--- a/logger/logger_test.go
+++ b/logger/logger_test.go
@@ -12,4 +12,5 @@ func TestLogger(t *testing.T) {
 	l.Trace("trace_msg1")
 	l.Warn("warn_msg1")
 	l.Fields(map[string]interface{}{"error": "test"}).Info("error message")
+	l.Warn("first", " ", "second")
 }
diff --git a/logger/micro.go b/logger/micro.go
index d4b12c81..62c21161 100644
--- a/logger/micro.go
+++ b/logger/micro.go
@@ -84,32 +84,57 @@ func logCallerfilePath(loggingFilePath string) string {
 	return loggingFilePath[idx+1:]
 }
 
-func (l *defaultLogger) Info(msg string, args ...interface{}) {
-	l.log(InfoLevel, msg, args...)
+func (l *defaultLogger) Info(args ...interface{}) {
+	l.log(InfoLevel, args...)
 }
 
-func (l *defaultLogger) Error(msg string, args ...interface{}) {
-	l.log(ErrorLevel, msg, args...)
+func (l *defaultLogger) Error(args ...interface{}) {
+	l.log(ErrorLevel, args...)
 }
 
-func (l *defaultLogger) Debug(msg string, args ...interface{}) {
-	l.log(DebugLevel, msg, args...)
+func (l *defaultLogger) Debug(args ...interface{}) {
+	l.log(DebugLevel, args...)
 }
 
-func (l *defaultLogger) Warn(msg string, args ...interface{}) {
-	l.log(WarnLevel, msg, args...)
+func (l *defaultLogger) Warn(args ...interface{}) {
+	l.log(WarnLevel, args...)
 }
 
-func (l *defaultLogger) Trace(msg string, args ...interface{}) {
-	l.log(TraceLevel, msg, args...)
+func (l *defaultLogger) Trace(args ...interface{}) {
+	l.log(TraceLevel, args...)
 }
 
-func (l *defaultLogger) Fatal(msg string, args ...interface{}) {
-	l.log(FatalLevel, msg, args...)
+func (l *defaultLogger) Fatal(args ...interface{}) {
+	l.log(FatalLevel, args...)
 	os.Exit(1)
 }
 
-func (l *defaultLogger) log(level Level, msg string, args ...interface{}) {
+func (l *defaultLogger) Infof(msg string, args ...interface{}) {
+	l.logf(InfoLevel, msg, args...)
+}
+
+func (l *defaultLogger) Errorf(msg string, args ...interface{}) {
+	l.logf(ErrorLevel, msg, args...)
+}
+
+func (l *defaultLogger) Debugf(msg string, args ...interface{}) {
+	l.logf(DebugLevel, msg, args...)
+}
+
+func (l *defaultLogger) Warnf(msg string, args ...interface{}) {
+	l.logf(WarnLevel, msg, args...)
+}
+
+func (l *defaultLogger) Tracef(msg string, args ...interface{}) {
+	l.logf(TraceLevel, msg, args...)
+}
+
+func (l *defaultLogger) Fatalf(msg string, args ...interface{}) {
+	l.logf(FatalLevel, msg, args...)
+	os.Exit(1)
+}
+
+func (l *defaultLogger) log(level Level, args ...interface{}) {
 	if !l.V(level) {
 		return
 	}
@@ -125,12 +150,33 @@ func (l *defaultLogger) log(level Level, msg string, args ...interface{}) {
 	}
 
 	fields["timestamp"] = time.Now().Format("2006-01-02 15:04:05")
-	if len(msg) > 0 {
-		if len(args) > 0 {
-			fields["msg"] = fmt.Sprintf(msg, args...)
-		} else {
-			fields["msg"] = msg
-		}
+	fields["msg"] = fmt.Sprint(args...)
+
+	l.RLock()
+	_ = l.enc.Encode(fields)
+	l.RUnlock()
+}
+
+func (l *defaultLogger) logf(level Level, msg string, args ...interface{}) {
+	if !l.V(level) {
+		return
+	}
+
+	l.RLock()
+	fields := copyFields(l.opts.Fields)
+	l.RUnlock()
+
+	fields["level"] = level.String()
+
+	if _, file, line, ok := runtime.Caller(l.opts.CallerSkipCount); ok {
+		fields["caller"] = fmt.Sprintf("%s:%d", logCallerfilePath(file), line)
+	}
+
+	fields["timestamp"] = time.Now().Format("2006-01-02 15:04:05")
+	if len(args) > 0 {
+		fields["msg"] = fmt.Sprintf(msg, args...)
+	} else {
+		fields["msg"] = msg
 	}
 	l.RLock()
 	_ = l.enc.Encode(fields)