fix networking metrics to use appropriate namespace

internal/kubernetes/prometheus/metrics.go

@@ -145,15 +145,15 @@ func QueryPrometheus(
 		netPodSelector := fmt.Sprintf(`namespace="%s",pod=~"%s",container="POD"`, opts.Namespace, selectionRegex)
 		query = fmt.Sprintf("rate(container_network_receive_bytes_total{%s}[5m])", netPodSelector)
 	} else if opts.Metric == "nginx:errors" {
-		num := fmt.Sprintf(`sum(rate(nginx_ingress_controller_requests{status=~"5.*",namespace="%s",ingress=~"%s"}[5m]) OR on() vector(0))`, opts.Namespace, selectionRegex)
-		denom := fmt.Sprintf(`sum(rate(nginx_ingress_controller_requests{namespace="%s",ingress=~"%s"}[5m]) > 0)`, opts.Namespace, selectionRegex)
+		num := fmt.Sprintf(`sum(rate(nginx_ingress_controller_requests{status=~"5.*",exported_namespace="%s",ingress=~"%s"}[5m]) OR on() vector(0))`, opts.Namespace, selectionRegex)
+		denom := fmt.Sprintf(`sum(rate(nginx_ingress_controller_requests{exported_namespace="%s",ingress=~"%s"}[5m]) > 0)`, opts.Namespace, selectionRegex)
 		query = fmt.Sprintf(`%s / %s * 100 OR on() vector(0)`, num, denom)
 	} else if opts.Metric == "nginx:latency" {
-		num := fmt.Sprintf(`sum(rate(nginx_ingress_controller_request_duration_seconds_sum{namespace=~"%s",ingress=~"%s"}[5m]) OR on() vector(0))`, opts.Namespace, selectionRegex)
-		denom := fmt.Sprintf(`sum(rate(nginx_ingress_controller_request_duration_seconds_count{namespace=~"%s",ingress=~"%s"}[5m]))`, opts.Namespace, selectionRegex)
+		num := fmt.Sprintf(`sum(rate(nginx_ingress_controller_request_duration_seconds_sum{exported_namespace=~"%s",ingress=~"%s"}[5m]) OR on() vector(0))`, opts.Namespace, selectionRegex)
+		denom := fmt.Sprintf(`sum(rate(nginx_ingress_controller_request_duration_seconds_count{exported_namespace=~"%s",ingress=~"%s"}[5m]))`, opts.Namespace, selectionRegex)
 		query = fmt.Sprintf(`%s / %s OR on() vector(0)`, num, denom)
 	} else if opts.Metric == "nginx:latency-histogram" {
-		query = fmt.Sprintf(`histogram_quantile(%f, sum(rate(nginx_ingress_controller_request_duration_seconds_bucket{status!="404",status!="500",namespace=~"%s",ingress=~"%s"}[5m])) by (le, ingress))`, opts.Percentile, opts.Namespace, selectionRegex)
+		query = fmt.Sprintf(`histogram_quantile(%f, sum(rate(nginx_ingress_controller_request_duration_seconds_bucket{status!="404",status!="500",exported_namespace=~"%s",ingress=~"%s"}[5m])) by (le, ingress))`, opts.Percentile, opts.Namespace, selectionRegex)
 	} else if opts.Metric == "cpu_hpa_threshold" {
 		// get the name of the kube hpa metric
 		metricName, hpaMetricName := getKubeHPAMetricName(clientset, service, opts, "spec_target_metric")