Prometheus Monitoring Extension

Purpose

The Prometheus Monitoring extension allows HiveMQ to expose metrics to a Prometheus application.

Installation

1. Unzip the file: hivemq-prometheus-extension-<version>-distribution.zip to the directory: <HIVEMQ_HOME>/extensions
2. A configuration file prometheusConfiguration.properties can be found in the hivemq-prometheus-extension folder.
3. The properties are preconfigured with standard settings and can be adapted to your needs (The meaning of the fields is explained below).
4. Start HiveMQ.

Configuration

The extension can be configured with the prometheusConfiguration.properties file, which is part of the hivemq-prometheus-extension folder.

Configuration Options

First Steps

You can test your configuration by navigating to <ip>:<port><metric_path> (as configured in prometheusConfiguration.properties) in your browser. For example the address would be http://localhost:9399/metrics with default values.

You should see data provided by the extension:

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# HELP com_hivemq_messages_incoming_publish_rate_total Generated from Dropwizard metric import 
(metric=com.hivemq.messages.incoming.publish.rate, type=com.codahale.metrics.Meter)
# TYPE com_hivemq_messages_incoming_publish_rate_total counter
com_hivemq_messages_incoming_publish_rate_total 0.0
...

Final Steps

1. Load and install Prometheus
2. Configure Prometheus to scrape from : as configured in the prometheusConfiguration.properties.
3. Look at the website provided by your Prometheus application. You should be able to find the HiveMQ metrics.

For detailed information please visit: Prometheus Configuration

To enable Prometheus to gather metrics from HiveMQ, you need to add a scrape configuration to your Prometheus configuration. The following is a minimal example using the default values of the extension:

prometheus.yml

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global:
  scrape_interval: 15s
scrape_configs:
  - job_name: 'hivemq'
    scrape_interval: 5s
    metrics_path: '/metrics'
    static_configs:
      - targets: ['localhost:9399']

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