From 2fbdace1eb059c75d95fbf16d7b4d4322d9bba50 Mon Sep 17 00:00:00 2001
From: aparcar <spooren@informatik.uni-leipzig.de>
Date: Thu, 2 Mar 2017 01:45:51 +0100
Subject: [PATCH] add prober_dns_lookup_time_seconds metric to solve #60 (#118)

add probe_dns_lookup_time_seconds metric
---
 icmp.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/icmp.go b/icmp.go
index 57fa0a1..0d5124a 100644
--- a/icmp.go
+++ b/icmp.go
@@ -73,10 +73,13 @@ func probeICMP(target string, w http.ResponseWriter, module Module) (success boo
 		fallbackProtocol = "ip6"
 	}
 
+	resolveStart := time.Now()
 	ip, err := net.ResolveIPAddr(module.ICMP.PreferredIpProtocol, target)
 	if err != nil && fallbackProtocol != "" {
 		ip, err = net.ResolveIPAddr(fallbackProtocol, target)
 	}
+	fmt.Fprintf(w, "probe_dns_lookup_time_seconds %f\n", float64(time.Since(resolveStart).Seconds()))
+
 	if err != nil {
 		log.Errorf("Error resolving address %s: %s", target, err)
 		return
-- 
2.25.1