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How to Use NGINX Prometheus Exporter

How to Use NGINX Prometheus Exporter

NGINX is a popular web server software that is known for its high performance and scalability. To monitor the performance of NGINX, Prometheus is a powerful tool that can be used to collect and analyze metrics. NGINX Prometheus exporter is a plugin that can be used to expose NGINX metrics to Prometheus. In this article, we will explain how to use NGINX Prometheus exporter to monitor your NGINX server.

Prerequisites:

Before we start, you need to make sure that you have the following prerequisites installed on your system:

  • NGINX web server
  • Prometheus monitoring tool
  • NGINX Prometheus exporter

Installation:

You can install NGINX Prometheus exporter using the following command:

sudo apt-get install nginx-prometheus-exporter

Once the installation is complete, you can check the status of the exporter using the following command:

sudo systemctl status nginx-prometheus-exporter

If the status is active, then the exporter is installed and running successfully.

Configuration:

To configure NGINX Prometheus exporter, you need to make changes to the NGINX configuration file. Open the NGINX configuration file using your preferred text editor and add the following lines:

location /metrics {
stub_status on;
access_log off;
allow 127.0.0.1;
deny all;
}

This configuration will enable NGINX to expose metrics on the /metrics endpoint.

Restart NGINX to apply the changes:

sudo systemctl restart nginx

After restarting NGINX, you should be able to access the /metrics endpoint using the following URL:

http://localhost/metrics

Prometheus Configuration:

Now that NGINX Prometheus exporter is up and running, you need to configure Prometheus to scrape metrics from NGINX. Open the Prometheus configuration file using your preferred text editor and add the following lines:

scrape_configs:
- job_name: 'nginx'
static_configs:
- targets: ['localhost:9113']

This configuration will instruct Prometheus to scrape metrics from NGINX Prometheus exporter running on port 9113.

Restart Prometheus to apply the changes:

sudo systemctl restart prometheus

After restarting Prometheus, you should be able to see NGINX metrics in the Prometheus web interface.

In this article, we explained how to use NGINX Prometheus exporter to monitor your NGINX server. By following the steps outlined in this article, you should be able to configure NGINX Prometheus exporter and Prometheus to collect and analyze NGINX metrics.

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  • That's it for this post. Keep practicing and have fun. Leave your comments if any.

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