Merge pull request #113310 from logicalhan/storage-metric

swap name for storage metric for underlying storage db

staging/src/k8s.io/apiserver/pkg/storage/etcd3/metrics/metrics.go

@@ -57,8 +57,9 @@ var (
 	)
 	dbTotalSize = compbasemetrics.NewGaugeVec(
 		&compbasemetrics.GaugeOpts{
-			Name:           "etcd_db_total_size_in_bytes",
+			Subsystem:      "apiserver",
-			Help:           "Total size of the etcd database file physically allocated in bytes.",
+			Name:           "storage_db_total_size_in_bytes",
+			Help:           "Total size of the storage database file physically allocated in bytes.",
 			StabilityLevel: compbasemetrics.ALPHA,
 		},
 		[]string{"endpoint"},