Add const labels to upMetric

collector/helper.go

@@ -11,11 +11,12 @@ func newGlobalMetric(namespace string, metricName string, docString string, cons
 	return prometheus.NewDesc(namespace+"_"+metricName, docString, nil, constLabels)
 }
 
-func newUpMetric(namespace string) prometheus.Gauge {
+func newUpMetric(namespace string, constLabels map[string]string) prometheus.Gauge {
 	return prometheus.NewGauge(prometheus.GaugeOpts{
 		Namespace:   namespace,
 		Name:        "up",
 		Help:        "Status of the last metric scrape",
+		ConstLabels: constLabels,
 	})
 }
 

collector/nginx.go

@@ -29,7 +29,7 @@ func NewNginxCollector(nginxClient *client.NginxClient, namespace string, constL
 			"connections_waiting":  newGlobalMetric(namespace, "connections_waiting", "Idle client connections", constLabels),
 			"http_requests_total":  newGlobalMetric(namespace, "http_requests_total", "Total http requests", constLabels),
 		},
-		upMetric: newUpMetric(namespace),
+		upMetric: newUpMetric(namespace, constLabels),
 	}
 }
 

collector/nginx_plus.go

@@ -136,7 +136,7 @@ func NewNginxPlusCollector(nginxClient *plusclient.NginxClient, namespace string
 			"timedout": newResolverMetric(namespace, "timedout", "Total number of timed out requests", constLabels),
 			"unknown":  newResolverMetric(namespace, "unknown", "Total requests completed with an unknown error", constLabels),
 		},
-		upMetric: newUpMetric(namespace),
+		upMetric: newUpMetric(namespace, constLabels),
 	}
 }