use ValidationScheme.IsValidLabelName

Signed-off-by: SungJin1212 <tjdwls1201@gmail.com>

Author: SungJin1212

pkg/util/validation/limits.go

@@ -375,9 +375,8 @@ func (l *Limits) Validate(shardByAllLabels bool, activeSeriesMetricsEnabled bool
 	if l.MaxLocalNativeHistogramSeriesPerUser > 0 && !activeSeriesMetricsEnabled {
 		return errMaxLocalNativeHistogramSeriesPerUserValidation
 	}
-
 	if err := l.RulerExternalLabels.Validate(func(l labels.Label) error {
-		if !model.LabelName(l.Name).IsValid() {
+		if !model.UTF8Validation.IsValidLabelName(l.Name) {
 			return fmt.Errorf("%w: %q", errInvalidLabelName, l.Name)
 		}
 		if !model.LabelValue(l.Value).IsValid() {

pkg/util/validation/validate.go

@@ -285,7 +285,7 @@ func ValidateLabels(validateMetrics *ValidateMetrics, limits *Limits, userID str
 			return newNoMetricNameError()
 		}
 
-		if !model.IsValidMetricName(model.LabelValue(unsafeMetricName)) {
+		if !model.UTF8Validation.IsValidMetricName(unsafeMetricName) {
 			validateMetrics.DiscardedSamples.WithLabelValues(invalidMetricName, userID).Inc()
 			return newInvalidMetricNameError(unsafeMetricName)
 		}
@@ -304,7 +304,7 @@ func ValidateLabels(validateMetrics *ValidateMetrics, limits *Limits, userID str
 	labelsSizeBytes := 0
 
 	for _, l := range ls {
-		if !skipLabelNameValidation && !model.LabelName(l.Name).IsValid() {
+		if !skipLabelNameValidation && !model.UTF8Validation.IsValidLabelName(l.Name) {
 			validateMetrics.DiscardedSamples.WithLabelValues(invalidLabel, userID).Inc()
 			return newInvalidLabelError(ls, l.Name)
 		} else if len(l.Name) > maxLabelNameLength {