Prometheus

Two delivery methods, either or both:

Method	Setting
Scrape `/metrics`	`Prometheus.Exporter: true` (config file only)
Push to a Pushgateway	`Prometheus.Pushgateway.Enabled`

Prometheus.Enabled: true (older key) is read as Exporter: true.

GUI

Destinations › Prometheus. Open /metrics opens the endpoint.

Prometheus settings page

Field	Setting	Default
Port	`Prometheus.Port`	`9184`
Metric Name Template	`Prometheus.MetricNameTemplate`	`rpdu2mqtt_{type}`
Node Tags › Include / Exclude	`Prometheus.NodeTags`	all nodes
Labels	`Prometheus.Labels`	`device`, `source`, `units`
Pushgateway › Enabled	`Prometheus.Pushgateway.Enabled`	off
Pushgateway › URL	`Prometheus.Pushgateway.Url`	e.g. `http://pushgateway:9091/metrics`
Pushgateway › Job	`Prometheus.Pushgateway.Job`	`rpdu2mqtt`
Pushgateway › Interval Seconds	`Prometheus.Pushgateway.IntervalSeconds`	`0` = PDU poll interval

Metric names

MetricNameTemplate placeholders:

Placeholder	Value
`{type}`	Measurement type, or its `Overrides.Measurements` ID
`{device}`	Device name
`{source}` / `{outlet}`	Outlet or entity name
`{units}`	Units

The result is lower-cased; non-alphanumeric characters become _. Example: pdu_{device}_{type} → pdu_rack_pdu_1_realpower.

Rename one type with an override:

Overrides:
  Measurements:
    realPower:
      ID: power      # rpdu2mqtt_power

The Paths page shows the resulting names.

Labels

Label	Example
`device` / `device_name`	`rack_pdu_1` / `Rack PDU 1`
`source` / `name`	`outlet_10` / `Dell MD1200`
`type` / `type_name`	`realpower` / `Real Power`
`number`	`10`
`units`	`W`
`instance`	`rack-b` (PDU instance key)
`hierarchy`	`Rack Circuit A` (energy-flow tier feeding it)

Changing the label set changes the identity of every existing series.

HELP text is the measurement name and unit, e.g. Real Power (W), measured by rPDU2MQTT.

Energy-flow metrics

rpdu2mqtt_flow_realpower, rpdu2mqtt_flow_energy, rpdu2mqtt_flow_energy_d, labelled node, name, kind, tier. See Totals and counters.

YAML

Prometheus:
  Exporter: true
  Port: 9184
  MetricNameTemplate: "rpdu2mqtt_{type}"
  Labels: [device, device_name, source, name, units]
  Pushgateway:
    Enabled: false
    Url: "http://pushgateway:9091/metrics"
    Job: "rpdu2mqtt"
    IntervalSeconds: 0

All settings: Prometheus settings reference.