victron_mqtt_exporter

Prometheus exporter for Victron MQTT devices

A purposely build Prometheus exporter for Victron Energy Cerbo GX MQTT devices.

Based on the General purpose Prometheus exporter for MQTT from Frederic Hemberger. (https://github.com/fhemberger/mqtt_exporter)

Subscribes to one or more MQTT topics, and lets you configure prometheus metrics based on pattern matching.

Features

Converts JSON string from Victron MQTT device topics to value readable by Prometheus.
Sends keepalive signal to Victron Energy Cerbo GX MQTT device (every 30 seconds).
Supported Metrics:
- standard metrics
  - Gauge, Counter, Histogram, Summary
- additional
  - Counter (Absolute):
    - Same as Counter, but working with absolute numbers received from MQTT. Which is far more common, than sending the diff in each publish.
    - e.g. a network counter or a rain sensor
  - Enum:
    - is a metric type not so common, details can be found in the OpenMetrics docs and Python client code.
    - Allows to track as state by a know set of strings describing the state, e.g. on/off or high/medium/low
    - Common sources would be a light switch oder a door lock.
Comprehensive rewriting for topic, value/payload and labels
- similar to prometheus label rewrites
- regex allows almost every conversion
- e.g. to
  - remove units or other strings from payload
  - convert topic hierarchy into labels
  - normalize labels
- check example configs ./exampleconf and the configs in ./test/test_data/

Create a folder to hold the config (default: conf/)
Add metric config(s) in YAML format to the folder. Files are combined and read as a single config. (See exampleconf/metric_example.yaml for details)
Install dependencies with pip3 install -r requirements-frozen.txt
Run ./mqtt_exporter.py