feat(issue-12348): add validator index label to validator_statuses me…

CHANGELOG.md

@@ -38,6 +38,7 @@ The format is based on Keep a Changelog, and this project adheres to Semantic Ve
 - Updated k8s-io/client-go to v0.30.4 and k8s-io/apimachinery to v0.30.4
 - Migrated tracing library from opencensus to opentelemetry for both the beacon node and validator.
 - Refactored light client code to make it more readable and make future PRs easier.
+- Added validator index label to `validator_statuses` metric
 
 ### Deprecated
 - `--disable-grpc-gateway` flag is deprecated due to grpc gateway removal.

validator/client/metrics.go

@@ -16,15 +16,15 @@ import (
 )
 
 var (
-	// ValidatorStatusesGaugeVec used to track validator statuses by public key.
+	// ValidatorStatusesGaugeVec used to track validator statuses by public key and validator index.
 	ValidatorStatusesGaugeVec = promauto.NewGaugeVec(
 		prometheus.GaugeOpts{
 			Namespace: "validator",
 			Name:      "statuses",
 			Help:      "validator statuses: 0 UNKNOWN, 1 DEPOSITED, 2 PENDING, 3 ACTIVE, 4 EXITING, 5 SLASHING, 6 EXITED",
 		},
 		[]string{
-			"pubkey",
+			"pubkey", "index",
 		},
 	)
 	// ValidatorAggSuccessVec used to count successful aggregations.

validator/client/validator.go

@@ -362,8 +362,8 @@ func (v *validator) checkAndLogValidatorStatus(activeValCount int64) bool {
 		}
 		log := log.WithFields(fields)
 		if v.emitAccountMetrics {
-			fmtKey := fmt.Sprintf("%#x", s.publicKey)
-			ValidatorStatusesGaugeVec.WithLabelValues(fmtKey).Set(float64(s.status.Status))
+			fmtKey, fmtIndex := fmt.Sprintf("%#x", s.publicKey), fmt.Sprintf("%#x", s.index)
+			ValidatorStatusesGaugeVec.WithLabelValues(fmtKey, fmtIndex).Set(float64(s.status.Status))
 		}
 		switch s.status.Status {
 		case ethpb.ValidatorStatus_UNKNOWN_STATUS: