feat: add error-event metric

main.go

@@ -20,6 +20,7 @@ type Telemetry struct {
 type metrics struct {
 	buffering   *prometheus.CounterVec
 	recovery    *prometheus.CounterVec
+	errorMetric *prometheus.CounterVec
 	qualityUp   *prometheus.CounterVec
 	qualityDown *prometheus.CounterVec
 }
@@ -27,6 +28,7 @@ type metrics struct {
 const (
 	typeBuffering     = "buffering"
 	typeRecovery      = "recovery"
+	typeError         = "error"
 	typeQualitySwitch = "quality_switch"
 )
 
@@ -97,6 +99,12 @@ func initMetrics() (metrics, error) {
 		Name:      "recovery",
 	}, []string{"slug"})
 
+	metricError := prometheus.NewCounterVec(prometheus.CounterOpts{
+		Namespace: "telemetry",
+		Subsystem: "player",
+		Name:      "error",
+	}, []string{"slug"})
+
 	metricQualitySwitchUp := prometheus.NewCounterVec(prometheus.CounterOpts{
 		Namespace: "telemetry",
 		Subsystem: "player",
@@ -117,6 +125,10 @@ func initMetrics() (metrics, error) {
 		return metrics{}, fmt.Errorf("failed to register recovery metric: %w", err)
 	}
 
+	if err := prometheus.Register(metricError); err != nil {
+		return metrics{}, fmt.Errorf("failed to register error metric: %w", err)
+	}
+
 	if err := prometheus.Register(metricQualitySwitchUp); err != nil {
 		return metrics{}, fmt.Errorf("failed to register quality_switch_up metric: %w", err)
 	}
@@ -128,6 +140,7 @@ func initMetrics() (metrics, error) {
 	return metrics{
 		buffering:   metricBuffering,
 		recovery:    metricRecovery,
+		errorMetric: metricError,
 		qualityUp:   metricQualitySwitchUp,
 		qualityDown: metricQualitySwitchDown,
 	}, nil