Monitoring NGINX Ingress Controller with VTS metrics
Introduced in GitLab 9.5.
NOTE: Note: NGINX Ingress version 0.16 and above have built-in Prometheus metrics, which are different than the VTS based metrics.
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 through 0.15.x.
Prometheus integration must be active.
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Configuring NGINX Ingress monitoring
For other deployments, there is some configuration required depending on your installation:
- NGINX Ingress should be version 0.9.0 or above, with metrics enabled.
- NGINX Ingress should be annotated for Prometheus monitoring.
- Prometheus should be configured to monitor annotated pods.
About managed NGINX Ingress deployments
NGINX Ingress is deployed into the
gitlab-managed-apps namespace, using the official Helm chart. NGINX Ingress will be externally reachable via the Load Balancer's Endpoint.
NGINX is configured for Prometheus monitoring, by setting:
enable-vts-status: "true", to export Prometheus metrics.
prometheus.io/scrape: "true", to enable automatic discovery.
prometheus.io/port: "10254", to specify the metrics port.
When used in conjunction with the GitLab deployed Prometheus service, response metrics will be automatically collected.
Manually setting up NGINX Ingress for Prometheus monitoring
Version 0.9.0 and above of NGINX Ingress 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 will start running on port 10254.
Next, the Ingress needs to be annotated for Prometheus monitoring. Two new annotations need to be added:
Managing these settings depends on how NGINX Ingress has been deployed. If you have deployed via the official Helm chart, 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.
Specifying the Environment label
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 will search for metrics with appropriate labels. In this case, the
upstream label must be of the form
If you have used Auto Deploy to deploy your app, this format will be used automatically and metrics will be detected with no action on your part.