add Prometheus exporter

all/prometheus/main.go

@@ -398,7 +398,7 @@ func main() {
 	})
 	fmt.Println("Start server at :10000")
 	if err := http.ListenAndServe(":10000", nil); err != nil {
-		fmt.Printf("Error occur when start server %v", err)
+		fmt.Printf("Error occur when start exporter server %v", err)
 		os.Exit(1)
 	}
 }