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GitLab has support for automatically detecting and monitoring the Kubernetes NGINX Ingress controller. This is provided by leveraging the included VTS Prometheus metrics exporter in [version 0.9.0](https://github.com/kubernetes/ingress-nginx/blob/master/Changelog.md#09-beta1) through [0.15.x](https://github.com/kubernetes/ingress-nginx/blob/master/Changelog.md#0150).
Version 0.9.0 and above of [NGINX Ingress](https://github.com/kubernetes/ingress-nginx) has built-in support for exporting Prometheus metrics. To enable, a ConfigMap setting must be passed: `enable-vts-status: "true"`. Once enabled, a Prometheus metrics endpoint begins running on port 10254.
Managing these settings depends on how NGINX Ingress has been deployed. If you have deployed via the [official Helm chart](https://github.com/helm/charts/tree/master/stable/nginx-ingress), metrics can be enabled with `controller.stats.enabled` along with the required annotations. Alternatively it is possible edit the NGINX Ingress YAML directly in the [Kubernetes dashboard](https://github.com/kubernetes/dashboard).
In order to isolate and only display relevant metrics for a given environment, GitLab needs a method to detect which labels are associated. To do this, GitLab searches for metrics with appropriate labels. In this case, the `upstream` label must be of the form `<KUBE_NAMESPACE>-<CI_ENVIRONMENT_SLUG>-*`.
If you have used [Auto Deploy](../../../../topics/autodevops/stages.md#auto-deploy) to deploy your app, this format is used automatically and metrics are detected with no action on your part.