Produce metrics for nominal output power.

upscollector.go

@@ -31,6 +31,7 @@ type UPSCollector struct {
 	LastTransferOnBattery               *prometheus.Desc
 	LastTransferOffBattery              *prometheus.Desc
 	LastSelftest                        *prometheus.Desc
+	NominalPowerWatts                   *prometheus.Desc
 
 	ss StatusSource
 }
@@ -135,6 +136,13 @@ func NewUPSCollector(ss StatusSource) *UPSCollector {
 			nil,
 		),
 
+		NominalPowerWatts: prometheus.NewDesc(
+			prometheus.BuildFQName(namespace, "", "apcupsd_nominal_power_watts"),
+			"Nominal power output in watts",
+			labels,
+			nil,
+		),
+
 		ss: ss,
 	}
 }
@@ -244,6 +252,13 @@ func (c *UPSCollector) collect(ch chan<- prometheus.Metric) (*prometheus.Desc, e
 		labels...
 	)
 
+	ch <- prometheus.MustNewConstMetric(
+		c.NominalPowerWatts,
+		prometheus.GaugeValue,
+		float64(s.NominalPower),
+		labels...,
+	)
+
 	return nil, nil
 }
 

upscollector_test.go

@@ -45,6 +45,7 @@ func TestUPSCollector(t *testing.T) {
 					XOnBattery:              time.Unix(100001, 0),
 					XOffBattery:             time.Unix(100002, 0),
 					LastSelftest:            time.Unix(100003, 0),
+					NominalPower:            50.0,
 				},
 			},
 			matches: []*regexp.Regexp{
@@ -61,6 +62,7 @@ func TestUPSCollector(t *testing.T) {
 				regexp.MustCompile(`apcupsd_last_transfer_on_battery{hostname="a",model="b",ups_name="c"} 100001`),
 				regexp.MustCompile(`apcupsd_last_transfer_off_battery{hostname="a",model="b",ups_name="c"} 100002`),
 				regexp.MustCompile(`apcupsd_last_selftest{hostname="a",model="b",ups_name="c"} 100003`),
+				regexp.MustCompile(`apcupsd_nominal_power_watts{hostname="a",model="b",ups_name="c"} 50`),
 			},
 		},
 	}