Properly support PacketLoss and export as metric

main.go

@@ -54,6 +54,13 @@ var (
 		},
 		labels,
 	)
+	packetLoss = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Name: "isp_packet_loss",
+			Help: "The packet loss of the network",
+		},
+		labels,
+	)
 	
 	listenPort uint16
 	listenAddr string
@@ -92,7 +99,7 @@ type SpeedTestResult struct {
 			Jitter float64
 		}
 	}
-	PacketLoss int
+	PacketLoss float64
 	ISP string
 	Interface struct {
 		InternalIP string
@@ -121,6 +128,7 @@ func init() {
 	prometheus.MustRegister(uploadSpeed)
 	prometheus.MustRegister(downloadSpeed)
 	prometheus.MustRegister(pingLatency)
+	prometheus.MustRegister(packetLoss)
 
 	if lpEV, ok := os.LookupEnv(listenPortEnvVar); !ok {
 		listenPort = defaultListenPort
@@ -215,6 +223,7 @@ func runTest() {
 	uploadSpeed.WithLabelValues(labelVals...).Set(uploadBandwidth)
 	downloadSpeed.WithLabelValues(labelVals...).Set(downloadBandwidth)
 	pingLatency.WithLabelValues(labelVals...).Set(result.Ping.Latency)
+	packetLoss.WithLabelValues(labelVals...).Set(result.PacketLoss)
 }
 
 func main() {