From fe119f82382e080aa672a9d5a3d435594e24a2b1 Mon Sep 17 00:00:00 2001
From: Radek Simko <radek.simko@gmail.com>
Date: Mon, 15 May 2017 06:50:41 +0200
Subject: [PATCH] provider/aws: Show state reason when EC2 instance fails to
 launch

---
 .../providers/aws/resource_aws_instance.go    | 21 ++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/builtin/providers/aws/resource_aws_instance.go b/builtin/providers/aws/resource_aws_instance.go
index 153334ded36f..022611f11a20 100644
--- a/builtin/providers/aws/resource_aws_instance.go
+++ b/builtin/providers/aws/resource_aws_instance.go
@@ -1018,10 +1018,29 @@ func InstanceStateRefreshFunc(conn *ec2.EC2, instanceID string) resource.StateRe
 		}
 
 		i := resp.Reservations[0].Instances[0]
-		return i, *i.State.Name, nil
+		state := *i.State.Name
+
+		if state == "terminated" {
+			return i, state, fmt.Errorf("Failed to launch instance. Reason: %s",
+				stringifyStateReason(i.StateReason))
+
+		}
+
+		return i, state, nil
 	}
 }
 
+func stringifyStateReason(sr *ec2.StateReason) string {
+	if sr.Message != nil {
+		return *sr.Message
+	}
+	if sr.Code != nil {
+		return *sr.Code
+	}
+
+	return sr.String()
+}
+
 func readBlockDevices(d *schema.ResourceData, instance *ec2.Instance, conn *ec2.EC2) error {
 	ibds, err := readBlockDevicesFromInstance(instance, conn)
 	if err != nil {