Provide newly required initialization arguments aws/aws-sdk-go#452

src/cmd/s3kms/main.go

@@ -10,6 +10,7 @@ import (
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/aws/credentials"
 	"github.com/aws/aws-sdk-go/aws/credentials/ec2rolecreds"
+	"github.com/aws/aws-sdk-go/aws/ec2metadata"
 	"github.com/aws/aws-sdk-go/aws/session"
 	"github.com/aws/aws-sdk-go/service/s3"
 	"github.com/codegangsta/cli"
@@ -20,10 +21,11 @@ const (
 )
 
 func getAWSConfig(c *cli.Context) *aws.Config {
+	defaultClient := ec2metadata.New(session.New(aws.NewConfig()))
 	creds := credentials.NewChainCredentials(
 		[]credentials.Provider{
 			&credentials.EnvProvider{},
-			&ec2rolecreds.EC2RoleProvider{ExpiryWindow: 5 * time.Minute},
+			&ec2rolecreds.EC2RoleProvider{ExpiryWindow: 5 * time.Minute, Client: defaultClient},
 		})
 	region := c.GlobalString("region")
 	return &aws.Config{Credentials: creds, Region: aws.String(region)}