Monitoring HAProxy (deprecated) (FREE)

Deprecated in GitLab 14.7.

WARNING: This feature is in its end-of-life process. It is deprecated in GitLab 14.7, and is planned for removal in GitLab 16.0.

GitLab has support for automatically detecting and monitoring HAProxy. This is provided by leveraging the HAProxy Exporter, which translates HAProxy statistics into a Prometheus readable form.

Requirements

The Prometheus service must be enabled.

Metrics supported

Name	Query
Throughput (req/sec)	sum(rate(haproxy_frontend_http_requests_total{%{environment_filter}}[2m])) by (code)
HTTP Error Rate (%)	sum(rate(haproxy_frontend_http_requests_total{code="5xx",%{environment_filter}}[2m])) / sum(rate(haproxy_frontend_http_requests_total{%{environment_filter}}[2m]))

Configuring Prometheus to monitor for HAProxy metrics

To get started with NGINX monitoring, you should install and configure the HAProxy exporter which parses these statistics and translates them into a Prometheus monitoring endpoint.

Specifying the Environment label

In order to isolate and only display relevant metrics for a given environment however, GitLab needs a method to detect which labels are associated. To do this, GitLab looks for an environment label.