Add Prometheus

main.go

@@ -8,6 +8,7 @@ import (
 	"git.icinga.com/icingadb/icingadb-main/config"
 	"git.icinga.com/icingadb/icingadb-main/configobject/host"
 	"git.icinga.com/icingadb/icingadb-main/configobject/sync"
+	"git.icinga.com/icingadb/icingadb-main/prometheus"
 	"git.icinga.com/icingadb/icingadb-main/supervisor"
 	log "github.com/sirupsen/logrus"
 )
@@ -60,6 +61,8 @@ func main() {
 		})
 	}()
 
+	go prometheus.HandleHttp("localhost:8080", super.ChErr)
+
 	for {
 		select {
 		case err := <-super.ChErr:

prometheus/prometheus.go

@@ -0,0 +1,13 @@
+package prometheus
+
+import (
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	log "github.com/sirupsen/logrus"
+	"net/http"
+)
+
+func HandleHttp(addr string, chErr chan error) {
+	http.Handle("/metrics", promhttp.Handler())
+	log.Infof("Serving metrics at http://%s/metrics", addr)
+	chErr <- http.ListenAndServe(addr, nil)
+}