The mqtt2prometheus configuration can be specified directly in the values.yaml file under the config section. This configuration will be automatically mounted at /config.yaml in the pod.

Example configuration:

config:
  mqtt:
    server: tcp://mqtt-broker:1883
    user: myuser
    password: mypassword
    topic_path: sensors/+/data
    qos: 0
  cache:
    timeout: 24h
  json_parsing:
    separator: .
  metrics:
    - prom_name: temperature
      mqtt_name: temperature
      help: Temperature reading
      type: gauge
      const_labels:
        sensor_type: dht22

For a complete configuration example, see config.yaml.dist in the repository root.

Installation

Install the chart with:

helm install my-mqtt2prometheus ./helm \
  --set config.mqtt.server=tcp://your-mqtt-broker:1883 \
  --set config.mqtt.topic_path=your/topic/+

Or create a custom values.yaml file and install with:

helm install my-mqtt2prometheus ./helm -f my-values.yaml

Upgrading

To upgrade an existing release:

helm upgrade my-mqtt2prometheus ./helm -f my-values.yaml

Additional Volumes

You can mount additional volumes (e.g., for TLS certificates) using the volumes and volumeMounts fields:

volumes:
  - name: certs
    secret:
      secretName: mqtt-certs

volumeMounts:
  - name: certs
    mountPath: /certs
    readOnly: true

Then reference them in your config:

config:
  mqtt:
    server: tcp://mqtt-broker:8883
    ca_cert: /certs/ca.pem
    client_cert: /certs/client.pem
    client_key: /certs/client-key.pem