fix duplicate metric creation

goleveldb.go

@@ -11,7 +11,6 @@ import (
 	"github.com/syndtr/goleveldb/leveldb/util"
 
 	"github.com/prometheus/client_golang/prometheus"
-	"github.com/prometheus/client_golang/prometheus/promauto"
 )
 
 func init() {
@@ -225,49 +224,49 @@ func (db *GoLevelDB) ReverseIterator(start, end []byte) (Iterator, error) {
 }
 
 func (db *GoLevelDB) createPrometheusMetrics(dbName string) {
-	db.getDuration = promauto.NewGauge(prometheus.GaugeOpts{
+	db.getDuration = prometheus.NewGauge(prometheus.GaugeOpts{
 		Namespace: PROMETHEUS_NAMESPACE,
 		Subsystem: dbName,
 		Name:      "get_duration_ms",
 		Help:      "The duration of the Get() operation in ms.",
 	})
 	prometheus.MustRegister(db.getDuration)
-	db.setDuration = promauto.NewGauge(prometheus.GaugeOpts{
+	db.setDuration = prometheus.NewGauge(prometheus.GaugeOpts{
 		Namespace: PROMETHEUS_NAMESPACE,
 		Subsystem: dbName,
 		Name:      "set_duration_ms",
 		Help:      "The duration of the Set() operation in ms.",
 	})
 	prometheus.MustRegister(db.setDuration)
-	db.setSyncDuration = promauto.NewGauge(prometheus.GaugeOpts{
+	db.setSyncDuration = prometheus.NewGauge(prometheus.GaugeOpts{
 		Namespace: PROMETHEUS_NAMESPACE,
 		Subsystem: dbName,
 		Name:      "set_sync_duration_ms",
 		Help:      "The duration of the SetSync() operation in ms.",
 	})
 	prometheus.MustRegister(db.setSyncDuration)
-	db.deleteDuration = promauto.NewGauge(prometheus.GaugeOpts{
+	db.deleteDuration = prometheus.NewGauge(prometheus.GaugeOpts{
 		Namespace: PROMETHEUS_NAMESPACE,
 		Subsystem: dbName,
 		Name:      "delete_duration_ms",
 		Help:      "The duration of the Delete() operation in ms.",
 	})
 	prometheus.MustRegister(db.deleteDuration)
-	db.deleteSyncDuration = promauto.NewGauge(prometheus.GaugeOpts{
+	db.deleteSyncDuration = prometheus.NewGauge(prometheus.GaugeOpts{
 		Namespace: PROMETHEUS_NAMESPACE,
 		Subsystem: dbName,
 		Name:      "delete_sync_duration_ms",
 		Help:      "The duration of the DeleteSync() operation in ms.",
 	})
 	prometheus.MustRegister(db.deleteSyncDuration)
-	db.batchDuration = promauto.NewGauge(prometheus.GaugeOpts{
+	db.batchDuration = prometheus.NewGauge(prometheus.GaugeOpts{
 		Namespace: PROMETHEUS_NAMESPACE,
 		Subsystem: dbName,
 		Name:      "batch_duration_ms",
 		Help:      "The duration of the batch#write operation in ms.",
 	})
 	prometheus.MustRegister(db.batchDuration)
-	db.batchSyncDuration = promauto.NewGauge(prometheus.GaugeOpts{
+	db.batchSyncDuration = prometheus.NewGauge(prometheus.GaugeOpts{
 		Namespace: PROMETHEUS_NAMESPACE,
 		Subsystem: dbName,
 		Name:      "batch_sync_duration_ms",

goleveldb_stats_collector.go

@@ -5,7 +5,6 @@ import (
 	"sync"
 
 	"github.com/prometheus/client_golang/prometheus"
-	"github.com/prometheus/client_golang/prometheus/promauto"
 	"github.com/syndtr/goleveldb/leveldb"
 )
 
@@ -23,7 +22,7 @@ func newLevelDBCollector(db *leveldb.DB, dbName string) *levelDBCollector {
 	names := getMetricNames()
 	metrics := make(map[string]prometheus.Gauge, len(names))
 	for _, field := range names {
-		metrics[field] = promauto.NewGauge(prometheus.GaugeOpts{
+		metrics[field] = prometheus.NewGauge(prometheus.GaugeOpts{
 			Namespace: PROMETHEUS_NAMESPACE,
 			Subsystem: dbName,
 			Name:      field,
@@ -40,7 +39,7 @@ func newLevelDBCollector(db *leveldb.DB, dbName string) *levelDBCollector {
 	}
 	levelMetrics := make(map[string]*prometheus.GaugeVec, len(levelMetricsNames))
 	for _, field := range levelMetricsNames {
-		levelMetrics[field] = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		levelMetrics[field] = prometheus.NewGaugeVec(prometheus.GaugeOpts{
 			Namespace: PROMETHEUS_NAMESPACE,
 			Subsystem: dbName,
 			Name:      field,