diff --git a/.drone.yml b/.drone.yml
index 3c5aab6..6f759a1 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -16,7 +16,7 @@ steps:
       - name: deps
         path: /go
     commands:
-      - "curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.46.2"
+      - "curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin "
       - golangci-lint run
     when:
       event:
diff --git a/gauges.go b/gauges.go
index facec33..a981df0 100644
--- a/gauges.go
+++ b/gauges.go
@@ -26,11 +26,11 @@ var (
 		Name:      "metadata_config",
 		Help:      "metadata config",
 	}, []string{"name", "cluster_name", "time_refresh_in_ms", "group_replication_id"})
-	metadataConfigNodeGauge = promauto.NewGaugeVec(prometheus.GaugeOpts{
+	metadataConfigNodesGauge = promauto.NewGaugeVec(prometheus.GaugeOpts{
 		Namespace: nameSpace,
-		Name:      "metadata_config_node",
-		Help:      "metadata config node",
-	}, []string{"name", "router_host", "cluster_name", "hostname", "port"})
+		Name:      "metadata_config_nodes",
+		Help:      "count of metadata config node",
+	}, []string{"name", "router_host", "cluster_name"})
 	metadataStatusGauge = promauto.NewGaugeVec(prometheus.GaugeOpts{
 		Namespace: nameSpace,
 		Name:      "metadata_status",
diff --git a/main.go b/main.go
index 7788b87..c264032 100644
--- a/main.go
+++ b/main.go
@@ -4,7 +4,6 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"net/http"
 	"os"
@@ -97,7 +96,7 @@ func initializeClientOptions() (*mysqlrouter.Options, error) {
 		return nil, err
 	}
 
-	caCert, err := ioutil.ReadFile(caPath)
+	caCert, err := os.ReadFile(caPath)
 	if err != nil {
 		return nil, err
 	}
@@ -155,10 +154,8 @@ func collectMetrics() {
 		}
 		metadataConfigGauge.WithLabelValues(metadata.Name, metadataConfig.ClusterName, strconv.Itoa(metadataConfig.TimeRefreshInMs), metadataConfig.GroupReplicationID)
 
-		// config node
-		for _, metadataConfigNode := range metadataConfig.Nodes {
-			metadataConfigNodeGauge.WithLabelValues(metadata.Name, router.Hostname, metadataConfig.ClusterName, metadataConfigNode.Hostname, strconv.Itoa(metadataConfigNode.Port))
-		}
+		// config nodes count
+		metadataConfigNodesGauge.WithLabelValues(metadata.Name, router.Hostname, metadataConfig.ClusterName, strconv.Itoa(len(metadataConfig.Nodes)))
 
 		// status
 		if args.CollectMetadataStatus {