Report initialization errors to Sentry from main

cmd/veneur/main.go

@@ -2,8 +2,11 @@ package main
 
 import (
 	"flag"
+	"os"
+	"time"
 
 	"github.com/Sirupsen/logrus"
+	"github.com/getsentry/raven-go"
 	"github.com/stripe/veneur"
 	"github.com/stripe/veneur/trace"
 )
@@ -27,9 +30,34 @@ func main() {
 	if err != nil {
 		logrus.WithError(err).Fatal("Error reading config file")
 	}
+
 	server, err := veneur.NewFromConfig(conf)
 	if err != nil {
-		logrus.WithError(err).Fatal("Could not initialize server")
+		e := err
+
+		logrus.WithError(e).Error("Error initializing server")
+		var sentry *raven.Client
+		if conf.SentryDsn != "" {
+			sentry, err = raven.New(conf.SentryDsn)
+			if err != nil {
+				logrus.WithError(err).Error("Error initializing Sentry client")
+			}
+		}
+
+		hostname, _ := os.Hostname()
+
+		p := raven.NewPacket(e.Error())
+		if hostname != "" {
+			p.ServerName = hostname
+		}
+
+		_, ch := sentry.Capture(p, nil)
+		select {
+		case <-ch:
+		case <-time.After(10 * time.Second):
+		}
+
+		logrus.WithError(e).Fatal("Could not initialize server")
 	}
 	defer func() {
 		veneur.ConsumePanic(server.Sentry, server.Statsd, server.Hostname, recover())