title: Create custom Prometheus metrics in NiFi
body: <p>We are going to use the Prometheus framework to monitor our NiFi instance and dataflows inside.</p>
  <p>In order to achieve this, we already configured PrometheusReportingTask to expose pre-existing NiFi metrics.</p>
  <p>The amount of metrics is pretty full but we would like to create custom Prometheus metrics in or custom/predefined NiFi processors and expose them using PrometheusReportingTask.</p>
  <p>Is it possible to implement it?</p>
  <p>Thanks!</p>