chore: metrics: Make a global variable private

Made "recordRulesDescList" variable private.

Signed-off-by: Andrej Krejcir <akrejcir@redhat.com>

pkg/monitoring/rules/rules.go

@@ -30,8 +30,8 @@ type RecordRulesDesc struct {
 	Type        string
 }
 
-// RecordRulesDescList lists all SSP Operator Prometheus Record Rules
-var RecordRulesDescList = []RecordRulesDesc{
+// recordRulesDescList lists all SSP Operator Prometheus Record Rules
+var recordRulesDescList = []RecordRulesDesc{
 	{
 		Name:        "kubevirt_ssp_operator_up",
 		Expr:        intstr.FromString("sum(up{pod=~'ssp-operator.*'}) OR on() vector(0)"),
@@ -65,13 +65,19 @@ var RecordRulesDescList = []RecordRulesDesc{
 }
 
 func RecordRules() []promv1.Rule {
-	var recordRules []promv1.Rule
-
-	for _, rrd := range RecordRulesDescList {
-		recordRules = append(recordRules, promv1.Rule{Record: rrd.Name, Expr: rrd.Expr})
+	result := make([]promv1.Rule, 0, len(recordRulesDescList))
+	for _, rrd := range recordRulesDescList {
+		result = append(result, promv1.Rule{Record: rrd.Name, Expr: rrd.Expr})
 	}
+	return result
+}
 
-	return recordRules
+func RecordRulesWithDescriptions() []RecordRulesDesc {
+	result := make([]RecordRulesDesc, 0, len(recordRulesDescList))
+	for _, rrd := range recordRulesDescList {
+		result = append(result, rrd)
+	}
+	return result
 }
 
 func AlertRules(runbookURLTemplate string) []promv1.Rule {

tools/metricsdocs/metricsdocs.go

@@ -30,7 +30,7 @@ const (
 )
 
 func main() {
-	metricsList := recordRulesDescToMetricList(rules.RecordRulesDescList)
+	metricsList := recordRulesDescToMetricList(rules.RecordRulesWithDescriptions())
 
 	sspMetrics.SetupMetrics()
 	validatorMetrics.SetupMetrics()

tools/prom-metrics-collector/metrics_collector.go

@@ -14,7 +14,7 @@ var excludedMetrics = map[string]struct{}{}
 
 func readMetrics() []*dto.MetricFamily {
 	var metricFamilies []*dto.MetricFamily
-	sspMetrics := rules.RecordRulesDescList
+	sspMetrics := rules.RecordRulesWithDescriptions()
 
 	for _, metric := range sspMetrics {
 		if _, isExcludedMetric := excludedMetrics[metric.Name]; !isExcludedMetric {