feat: add labels defined in harvest config to metadata metrics

cmd/poller/collector/collector.go

@@ -217,6 +217,12 @@ func Init(c Collector) error {
 	md.SetGlobalLabel("object", object)
 	md.SetGlobalLabel("datacenter", params.GetChildContentS("datacenter"))
 
+	if params.HasChildS("labels") {
+		for _, l := range params.GetChildS("labels").GetChildren() {
+			md.SetGlobalLabel(l.GetNameS(), l.GetContentS())
+		}
+	}
+
 	_, _ = md.NewMetricInt64("poll_time")
 	_, _ = md.NewMetricInt64("task_time")
 	_, _ = md.NewMetricInt64("api_time")

cmd/poller/exporter/exporter.go

@@ -23,7 +23,7 @@ type Exporter interface {
 	Init() error      // initialize exporter
 	GetClass() string // the class of the exporter, e.g. Prometheus, InfluxDB
 	GetName() string  // the name of the exporter instance
-	// Name is different from Class, since we can have multiple instances of the same Class
+	// GetExportCount Name is different from Class, since we can have multiple instances of the same Class
 	GetExportCount() uint64             // return and reset number of exported data points, used by Poller to keep stats
 	AddExportCount(uint64)              // add count to the export count, called by the exporter itself
 	GetStatus() (uint8, string, string) // return current state of the exporter
@@ -72,6 +72,16 @@ func New(c, n string, o *options.Options, p conf.Exporter, params *conf.Poller)
 	}
 	if params != nil {
 		abc.Metadata.SetGlobalLabel("datacenter", params.Datacenter)
+		labels := params.Labels
+		if labels != nil {
+			for _, labelPtr := range *labels {
+				if labelPtr != nil {
+					for key, value := range *labelPtr {
+						abc.Metadata.SetGlobalLabel(key, value)
+					}
+				}
+			}
+		}
 	}
 	return &abc
 }

cmd/poller/poller.go

@@ -931,6 +931,17 @@ func (p *Poller) loadMetadata() {
 	if p.options.PromPort != 0 {
 		p.status.SetGlobalLabel("promport", strconv.Itoa(p.options.PromPort))
 	}
+	labels := p.params.Labels
+	if labels != nil {
+		for _, labelPtr := range *labels {
+			if labelPtr != nil {
+				for key, value := range *labelPtr {
+					p.metadata.SetGlobalLabel(key, value)
+					p.status.SetGlobalLabel(key, value)
+				}
+			}
+		}
+	}
 	p.status.SetExportOptions(matrix.DefaultExportOptions())
 }