use prometheus common logging

main.go

@@ -3,12 +3,12 @@ package main
 import (
 	"flag"
 	"fmt"
-	"log"
 	"net/http"
 	"os"
 
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"github.com/prometheus/common/log"
 )
 
 const version string = "0.7.0"
@@ -61,7 +61,7 @@ func errorHandler(f func(http.ResponseWriter, *http.Request) error) http.Handler
 		err := f(w, r)
 
 		if err != nil {
-			log.Println(err)
+			log.Errorln(err)
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 		}
 	}
@@ -78,8 +78,9 @@ func handleMetricsRequest(w http.ResponseWriter, r *http.Request) error {
 		c := NewMetricCollectorForProtocols(protocols)
 		reg.MustRegister(c)
 
-		h := promhttp.HandlerFor(reg, promhttp.HandlerOpts{})
-		h.ServeHTTP(w, r)
+		promhttp.HandlerFor(reg, promhttp.HandlerOpts{
+			ErrorLog:      log.NewErrorLogger(),
+			ErrorHandling: promhttp.ContinueOnError}).ServeHTTP(w, r)
 	}
 
 	return nil

vendor/vendor.json

@@ -2,6 +2,12 @@
 	"comment": "",
 	"ignore": "test",
 	"package": [
+		{
+			"checksumSHA1": "DYv6Q1+VfnUVxMwvk5IshAClLvw=",
+			"path": "github.com/Sirupsen/logrus",
+			"revision": "5e5dc898656f695e2a086b8e12559febbfc01562",
+			"revisionTime": "2017-05-15T10:45:16Z"
+		},
 		{
 			"checksumSHA1": "spyv5/YFBjYyZLZa1U2LBfDR8PM=",
 			"path": "github.com/beorn7/perks/quantile",
@@ -56,6 +62,12 @@
 			"revision": "13ba4ddd0caa9c28ca7b7bffe1dfa9ed8d5ef207",
 			"revisionTime": "2017-04-27T09:54:55Z"
 		},
+		{
+			"checksumSHA1": "vfkLfDs6hXtxdJNGdWQglsxFu40=",
+			"path": "github.com/prometheus/common/log",
+			"revision": "13ba4ddd0caa9c28ca7b7bffe1dfa9ed8d5ef207",
+			"revisionTime": "2017-04-27T09:54:55Z"
+		},
 		{
 			"checksumSHA1": "0LL9u9tfv1KPBjNEiMDP6q7lpog=",
 			"path": "github.com/prometheus/common/model",
@@ -73,6 +85,30 @@
 			"path": "github.com/prometheus/procfs/xfs",
 			"revision": "65c1f6f8f0fc1e2185eb9863a3bc751496404259",
 			"revisionTime": "2017-05-19T19:08:37Z"
+		},
+		{
+			"checksumSHA1": "J+ZM49hifaNMFSbPAEibmNoCMh8=",
+			"path": "golang.org/x/sys/unix",
+			"revision": "a55a76086885b80f79961eacb876ebd8caf3868d",
+			"revisionTime": "2017-05-24T02:50:34Z"
+		},
+		{
+			"checksumSHA1": "2Coyr3Bq1dPkFg+ZYHEq1+/Rn58=",
+			"path": "golang.org/x/sys/windows",
+			"revision": "a55a76086885b80f79961eacb876ebd8caf3868d",
+			"revisionTime": "2017-05-24T02:50:34Z"
+		},
+		{
+			"checksumSHA1": "ZdFZFaXmCgEEaEhVPkyXrnhKhsg=",
+			"path": "golang.org/x/sys/windows/registry",
+			"revision": "a55a76086885b80f79961eacb876ebd8caf3868d",
+			"revisionTime": "2017-05-24T02:50:34Z"
+		},
+		{
+			"checksumSHA1": "uVlUSSKplihZG7N+QJ6fzDZ4Kh8=",
+			"path": "golang.org/x/sys/windows/svc/eventlog",
+			"revision": "a55a76086885b80f79961eacb876ebd8caf3868d",
+			"revisionTime": "2017-05-24T02:50:34Z"
 		}
 	],
 	"rootPath": "github.com/czerwonk/bird_exporter"