Create Custom Metrics in Prometheus

To create custom metrics in Prometheus system, you need to follow these steps:

1. Create a new metric definition file, typically written in PromQL language. You can use a text editor to create a file with a .prom extension that includes definitions and calculation rules for the new metric.
2. Save the index definition file to the configuration directory of the Prometheus server, usually located in /etc/prometheus/. Make sure that the Prometheus configuration file includes a configuration option pointing to the new file, such as -prometheus.my_custom_metrics_file.
3. Restart the Prometheus server to load the new metric definition file, and start collecting and storing the new metric data.
4. Set up a new metric chart in Grafana or any other monitoring tool to display data from custom metrics on the monitoring dashboard.

By following the above steps, you can create custom metrics in the Prometheus system and start monitoring relevant metric data.