chore: Add name label to chaos_experiments metric

We need to be careful about cardinality, but since we won't have hundreds of chaos experiments
it should be ok to add name, given that is really useful for dashboards and alerting

Removed the expCache to simplify code

pkg/metrics/chaos-controller-manager.go

@@ -59,7 +59,7 @@ func NewChaosControllerManagerMetricsCollector(manager ctrl.Manager, registerer
 		chaosExperiments: prometheus.NewGaugeVec(prometheus.GaugeOpts{
 			Name: "chaos_controller_manager_chaos_experiments",
 			Help: "Total number of chaos experiments and their phases",
-		}, []string{"namespace", "kind", "phase"}),
+		}, []string{"namespace", "kind", "phase", "name"}),
 		SidecarTemplates: prometheus.NewGauge(prometheus.GaugeOpts{
 			Name: "chaos_mesh_templates",
 			Help: "Total number of injection templates",
@@ -153,7 +153,6 @@ func (collector *ChaosControllerManagerMetricsCollector) collectChaosExperiments
 	collector.chaosExperiments.Reset()
 
 	for kind, obj := range v1alpha1.AllKinds() {
-		expCache := map[string]map[string]int{}
 		chaosList := obj.SpawnList()
 		if err := collector.store.List(context.TODO(), chaosList); err != nil {
 			collector.logger.Error(err, "failed to list chaos", "kind", kind)
@@ -162,18 +161,11 @@ func (collector *ChaosControllerManagerMetricsCollector) collectChaosExperiments
 
 		items := chaosList.GetItems()
 		for _, item := range items {
-			if _, ok := expCache[item.GetNamespace()]; !ok {
-				// There is only 4 supported phases
-				expCache[item.GetNamespace()] = make(map[string]int, 4)
-			}
 			innerObject := reflect.ValueOf(item).Interface().(v1alpha1.InnerObject)
-			expCache[item.GetNamespace()][string(status.GetChaosStatus(innerObject))]++
-		}
-
-		for ns, v := range expCache {
-			for phase, count := range v {
-				collector.chaosExperiments.WithLabelValues(ns, kind, phase).Set(float64(count))
-			}
+			ns := item.GetNamespace()
+			name := item.GetName()
+			phase := string(status.GetChaosStatus(innerObject))
+			collector.chaosExperiments.WithLabelValues(ns, kind, phase, name).Inc()
 		}
 	}
 }