From 64cef5cd050fdf23b7cfc843f25a2386221f732c Mon Sep 17 00:00:00 2001
From: Mitsuhiro Tanda <mitsuhiro.tanda@gmail.com>
Date: Tue, 6 Jun 2017 22:02:23 +0900
Subject: [PATCH] handle NewSession() error

---
 config/config.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/config/config.go b/config/config.go
index 9cde121706..8a711f9254 100644
--- a/config/config.go
+++ b/config/config.go
@@ -1128,7 +1128,10 @@ func (c *EC2SDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
 		return err
 	}
 	if c.Region == "" {
-		sess := session.Must(session.NewSession())
+		sess, err := session.NewSession()
+		if err != nil {
+			return err
+		}
 		metadata := ec2metadata.New(sess)
 		region, err := metadata.Region()
 		if err != nil {