fix(output/prometheus-sd): int labels not allowed ...

output/prometheus-sd/output.go

@@ -11,7 +11,7 @@ type Output struct {
 	output.Output
 	path       string
 	targetType TargetAddressType
-	labels     map[string]interface{}
+	labels     map[string]string
 }
 
 type Config map[string]interface{}
@@ -55,9 +55,9 @@ func (c Config) TargetAddress() TargetAddressType {
 	return TargetAddressIP
 }
 
-func (c Config) Labels() map[string]interface{} {
+func (c Config) Labels() map[string]string {
 	if v, ok := c["labels"]; ok {
-		return v.(map[string]interface{})
+		return v.(map[string]string)
 	}
 	return nil
 }
@@ -82,16 +82,16 @@ func Register(configuration map[string]interface{}) (output.Output, error) {
 
 type Targets struct {
 	Targets []string               `json:"targets"`
-	Labels  map[string]interface{} `json:"labels,omitempty"`
+	Labels  map[string]string `json:"labels,omitempty"`
 }
 
-func toTargets(n *runtime.Node, defaultLabels map[string]interface{}, targetFunc TargetAddressFunc) *Targets {
+func toTargets(n *runtime.Node, defaultLabels map[string]string, targetFunc TargetAddressFunc) *Targets {
 	target := targetFunc(n)
 	if target == "" {
 		return nil
 	}
 
-	labels := map[string]interface{}{}
+	labels := map[string]string{}
 	for k, v := range defaultLabels {
 		labels[k] = v
 	}
@@ -120,10 +120,10 @@ func toTargets(n *runtime.Node, defaultLabels map[string]interface{}, targetFunc
 
 		// wireless - airtime
 		if wifi := ni.Wireless; wifi != nil {
-			labels["wifi_txpower24"] = wifi.TxPower24
-			labels["wifi_channel24"] = wifi.Channel24
-			labels["wifi_txpower5"] = wifi.TxPower5
-			labels["wifi_channel5"] = wifi.Channel5
+			labels["wifi_txpower24"] = string(wifi.TxPower24)
+			labels["wifi_channel24"] = string(wifi.Channel24)
+			labels["wifi_txpower5"] = string(wifi.TxPower5)
+			labels["wifi_channel5"] = string(wifi.Channel5)
 		}
 	}
 	return &Targets{