에러 로그 추가

main_client.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"repositories.action2quare.com/ayo/gocommon/flagx"
+	"repositories.action2quare.com/ayo/gocommon/logger"
 	"repositories.action2quare.com/ayo/houston/client"
 
 	"net/http"
@@ -23,7 +24,14 @@ func main() {
 
 	http.Handle("/metrics", promhttp.Handler())
 	server := &http.Server{Addr: ":9100", Handler: nil}
-	go server.ListenAndServe()
+
+	go func() {
+		logger.Println("listen /metrics")
+		err := server.ListenAndServe()
+		if err != nil {
+			logger.Error(err)
+		}
+	}()
 
 	hc.Start()
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)