lights extracted

.gitignore

@@ -0,0 +1 @@
+.vscode/launch.json

README.md

@@ -1 +1,48 @@
 # hue_exporter
+
+This exporter exports some variables from Philips Hue Bridge 
+(https://www.philips-hue.com)
+to prometheus.
+
+## Building
+
+    go get github.com/aexel90/hue_exporter/
+    cd $GOPATH/src/github.com/aexel90/hue_exporter
+    go install
+
+## Running
+
+How to create a user for your bridge is described here: https://developers.meethue.com/develop/get-started-2/
+
+Usage:
+
+    $GOPATH/bin/hue_exporter -h
+
+    Usage of ./hue_exporter:
+        -hue-url string
+            The URL of the bridge
+        -listen-address string     
+            The address to listen on for HTTP requests. (default "127.0.0.1:9773")
+        -test
+            test configured metrics
+        -username string
+            The username token having bridge access
+
+## Example execution
+
+### Running within prometheus:
+
+    $GOPATH/bin/hue_exporter -hue_url 192.168.xxx.xxx -username ZlEH24zabK2jTpJ...
+
+    # HELP hue_light_status status of lights registered at hue bridge
+    # TYPE hue_light_status gauge
+    hue_light_status{manufacturer_name="...",model_id="...",name="...",state_alert="...",state_bri="...",state_ct="...",state_on="...",state_reachable="...",state_saturation="...",sw_version="...",type="...",unique_id="..."} 1
+    hue_light_status{manufacturer_name="...",model_id="...",name="...",state_alert="...",state_bri="...",state_ct="...",state_on="...",state_reachable="...",state_saturation="...",sw_version="...",type="...",unique_id="..."} 0
+    ...
+
+### Test exporter:
+
+    $GOPATH/bin/hue_exporter -hue_url 192.168.xxx.xxx -username ZlEH24zabK2jTpJ... -test
+
+## Grafana Dashboard
+

collector/collector.go

@@ -0,0 +1,182 @@
+package collector
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/prometheus/client_golang/prometheus"
+
+	"github.com/aexel90/hue_exporter/hue"
+	"github.com/aexel90/hue_exporter/metric"
+)
+
+// Collector instance
+type Collector struct {
+	exporter *hue.Exporter
+	metrics  []*metric.Metric
+}
+
+// NewHueCollector initialization
+func NewHueCollector(URL string, username string) (*Collector, error) {
+
+	hueExporter := hue.Exporter{
+		BaseURL:  URL,
+		Username: username,
+	}
+
+	return &Collector{&hueExporter, nil}, nil
+}
+
+// Describe for prometheus
+func (collector *Collector) Describe(ch chan<- *prometheus.Desc) {
+
+	collector.metrics = collector.exporter.InitMetrics()
+	collector.initDescAndType()
+}
+
+// Collect for prometheus
+func (collector *Collector) Collect(ch chan<- prometheus.Metric) {
+
+	err := collector.collect()
+	if err != nil {
+		fmt.Println("Error: ", err)
+	}
+
+	for _, m := range collector.metrics {
+		for _, promResult := range m.PromResult {
+			ch <- prometheus.MustNewConstMetric(promResult.PromDesc, promResult.PromValueType, promResult.Value, promResult.LabelValues...)
+		}
+	}
+}
+
+//Test collector metrics
+func (collector *Collector) Test() {
+
+	collector.metrics = collector.exporter.InitMetrics()
+	collector.initDescAndType()
+
+	err := collector.collect()
+	if err != nil {
+		fmt.Println("Error: ", err)
+	}
+
+	err = collector.printResult()
+}
+
+func (collector *Collector) printResult() error {
+
+	for _, m := range collector.metrics {
+		fmt.Printf("Metric: %v\n", m.FqName)
+		fmt.Printf(" - Exporter Result:\n")
+
+		for i, result := range m.MetricResult {
+			fmt.Printf("   - Exporter Result %v:\n", i)
+			for key, value := range result {
+				fmt.Printf("     - %s=\"%v\"\n", key, value)
+			}
+		}
+
+		for _, promResult := range m.PromResult {
+
+			fmt.Printf("   - prom desc: %v\n", promResult.PromDesc)
+			fmt.Printf("     - prom metric type: %v\n", promResult.PromValueType)
+			fmt.Printf("     - prom metric value: %v\n", uint64(promResult.Value))
+			fmt.Printf("     - prom label values: %v\n", promResult.LabelValues)
+		}
+	}
+
+	return nil
+}
+
+func (collector *Collector) collect() (err error) {
+
+	err = collector.exporter.Collect(collector.metrics)
+	if err != nil {
+		return err
+	}
+
+	err = collector.getResult()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (collector *Collector) getResult() (err error) {
+
+	for _, m := range collector.metrics {
+		m.PromResult = nil
+		for _, metricResult := range m.MetricResult {
+
+			labelValues, err := getLabelValues(m.Labels, metricResult)
+			if err != nil {
+				return err
+			}
+			resultValue, err := getResultValue(m.ResultKey, metricResult)
+			if err != nil {
+				return err
+			}
+
+			result := metric.PrometheusResult{PromDesc: m.PromDesc, PromValueType: m.PromType, Value: resultValue, LabelValues: labelValues}
+			m.PromResult = append(m.PromResult, &result)
+		}
+	}
+	return nil
+}
+
+func (collector *Collector) initDescAndType() {
+
+	for _, metric := range collector.metrics {
+
+		var help string
+
+		switch metric.HueType {
+		case hue.TypeLight:
+			metric.FqName = "hue_light_status"
+			help = "status of lights registered at hue bridge"
+			metric.PromType = prometheus.GaugeValue
+		}
+
+		labels := []string{}
+		for _, label := range metric.Labels {
+			labels = append(labels, strings.ToLower(label))
+		}
+
+		metric.PromDesc = prometheus.NewDesc(metric.FqName, help, labels, nil)
+	}
+}
+
+func getResultValue(resultKey string, result map[string]interface{}) (float64, error) {
+
+	value := result[resultKey]
+	var floatValue float64
+
+	switch tval := value.(type) {
+	case float64:
+		floatValue = tval
+	case int:
+		floatValue = float64(tval)
+	case uint64:
+		floatValue = float64(tval)
+	case bool:
+		if tval {
+			floatValue = 1
+		} else {
+			floatValue = 0
+		}
+	default:
+		return 0, fmt.Errorf("[getResultValue] %v in %v - unknown type: %T", resultKey, result, value)
+	}
+	return floatValue, nil
+}
+
+func getLabelValues(labelNames []string, result map[string]interface{}) ([]string, error) {
+
+	labelValues := []string{}
+	for _, labelname := range labelNames {
+		labelValue := fmt.Sprintf("%v", result[labelname])
+		labelValue = strings.ToLower(labelValue)
+		labelValues = append(labelValues, labelValue)
+	}
+	return labelValues, nil
+}

hue/hue.go

@@ -0,0 +1,127 @@
+package hue
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/aexel90/hue_exporter/metric"
+	hue "github.com/collinux/gohue"
+)
+
+// Exporter data
+type Exporter struct {
+	BaseURL  string
+	Username string
+}
+
+const (
+	TypeLight = "light"
+	TypeOther = "???"
+
+	LightLabelName             = "Name"
+	LightLabelType             = "Type"
+	LightLabelModelID          = "Model_ID"
+	LightLabelManufacturerName = "Manufacturer_Name"
+	LightLabelSWVersion        = "SW_Version"
+	LightLabelUniqueID         = "Unique_ID"
+	LightLabelStateOn          = "State_On"
+	LightLabelStateAlert       = "State_Alert"
+	LightLabelStateBri         = "State_Bri"
+	LightLabelStateCT          = "State_CT"
+	LightLabelStateReachable   = "State_Reachable"
+	LightLabelStateSaturation  = "State_Saturation"
+)
+
+// InitMetrics func
+func (exporter *Exporter) InitMetrics() (metrics []*metric.Metric) {
+
+	metrics = append(metrics, &metric.Metric{
+		HueType:   TypeLight,
+		Labels:    []string{LightLabelName, LightLabelType, LightLabelModelID, LightLabelManufacturerName, LightLabelSWVersion, LightLabelUniqueID, LightLabelStateOn, LightLabelStateAlert, LightLabelStateBri, LightLabelStateCT, LightLabelStateReachable, LightLabelStateSaturation},
+		ResultKey: LightLabelStateOn})
+
+	return metrics
+}
+
+// Collect metrics
+func (exporter *Exporter) Collect(metrics []*metric.Metric) (err error) {
+
+	bridge := newBridge(exporter.BaseURL)
+
+	err = bridge.Login(exporter.Username)
+	if err != nil {
+		return fmt.Errorf("[error login] '%v'", err)
+	}
+
+	for _, metric := range metrics {
+
+		var err error
+
+		switch metric.HueType {
+		case TypeLight:
+			err = collectLights(bridge, metric)
+		}
+
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func collectLights(bridge *hue.Bridge, metric *metric.Metric) (err error) {
+
+	metric.MetricResult = nil
+
+	lights, err := bridge.GetAllLights()
+	if err != nil {
+		return fmt.Errorf("[error GetAllLights()] '%v'", err)
+	}
+
+	for _, light := range lights {
+
+		result := make(map[string]interface{})
+		for _, label := range metric.Labels {
+
+			switch label {
+			case LightLabelName:
+				result[LightLabelName] = light.Name
+			case LightLabelType:
+				result[LightLabelType] = light.Type
+			case LightLabelModelID:
+				result[LightLabelModelID] = light.ModelID
+			case LightLabelManufacturerName:
+				result[LightLabelManufacturerName] = light.ManufacturerName
+			case LightLabelSWVersion:
+				result[LightLabelSWVersion] = light.SWVersion
+			case LightLabelUniqueID:
+				result[LightLabelUniqueID] = light.UniqueID
+			case LightLabelStateOn:
+				result[LightLabelStateOn] = light.State.On
+			case LightLabelStateAlert:
+				result[LightLabelStateAlert] = light.State.Alert
+			case LightLabelStateBri:
+				result[LightLabelStateBri] = light.State.Bri
+			case LightLabelStateCT:
+				result[LightLabelStateCT] = light.State.CT
+			case LightLabelStateReachable:
+				result[LightLabelStateReachable] = light.State.Reachable
+			case LightLabelStateSaturation:
+				result[LightLabelStateSaturation] = light.State.Saturation
+			}
+		}
+
+		metric.MetricResult = append(metric.MetricResult, result)
+	}
+
+	return nil
+}
+
+func newBridge(ipAddr string) *hue.Bridge {
+	bridge, err := hue.NewBridge(ipAddr)
+	if err != nil {
+		log.Fatalf("Error connecting to Hue bridge at '%v': '%v'\n", ipAddr, err)
+	}
+	return bridge
+}

main.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/namsral/flag"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+
+	"github.com/aexel90/hue_exporter/collector"
+)
+
+var (
+	flagBridgeURL = flag.String("hue-url", "", "The URL of the bridge")
+	flagUsername  = flag.String("username", "", "The username token having bridge access")
+	flagAddress   = flag.String("listen-address", "127.0.0.1:9773", "The address to listen on for HTTP requests.")
+
+	flagTest = flag.Bool("test", false, "test configured metrics")
+)
+
+func main() {
+
+	flag.Parse()
+
+	hueCollector, err := collector.NewHueCollector(*flagBridgeURL, *flagUsername)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	// test mode
+	if *flagTest {
+		hueCollector.Test()
+		return
+	}
+
+	prometheus.MustRegister(hueCollector)
+
+	http.Handle("/metrics", promhttp.Handler())
+	fmt.Printf("metrics available at http://%s/metrics\n", *flagAddress)
+	log.Fatal(http.ListenAndServe(*flagAddress, nil))
+}

metric/metric.go

@@ -0,0 +1,40 @@
+package metric
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+type PrometheusResult struct {
+	PromDesc      *prometheus.Desc
+	PromValueType prometheus.ValueType
+	Value         float64
+	LabelValues   []string
+}
+
+// Metric struct
+type Metric struct {
+	// PromDesc       PromDesc   `json:"promDesc"`
+	// PromType       string     `json:"promType"`
+	// ResultKey      string     `json:"resultKey"`
+	// OkValue        string     `json:"okValue"`
+	// ResultPath     string     `json:"resultPath"`
+	// Page           string     `json:"page"`
+	// Service        string     `json:"service"`
+	// Action         string     `json:"action"`
+	// ActionArgument *ActionArg `json:"actionArgument"`
+
+	// Desc        *prometheus.Desc
+
+	// Value       float64
+	// labelValues []string
+
+	HueType      string
+	Labels       []string
+	MetricResult []map[string]interface{} //filled during collect
+	ResultKey    string
+	FqName       string
+
+	PromType   prometheus.ValueType
+	PromDesc   *prometheus.Desc
+	PromResult []*PrometheusResult
+}