User guide

your Amazon EC2 instance. When you create the Amazon EC2 instance, specify the IAM role that you

created previously in the IAM console.

When you create your Amazon EC2 instance, you will also need to specify a key pair and a security

group. Specify a key pair for which you have the private key (PEM file) stored on your local computer.

Specify a security group that will enable you to connect to your Amazon EC2 instance using RDP (port

3389). Information about key pairs and security groups is provided in the Amazon Elastic Compute Cloud

User Guide.

For information about how to programmatically launch an Amazon EC2 instance with an IAM role, see

Launch Amazon EC2 Instances (p. 48).

Edit the Source File to Remove the Credentials

Edit the source for the program so that it does not specify any credentials in the call that creates the

Amazon S3 client. In this new version of the program, the call to CreateAmazonS3Client no longer

takes any parameters.

using ( client = Amazon.AWSClientFactory.CreateAmazonS3Client() ) {

Build the modified program.You might actually run the program on your local computer to verify that it

does not work without credentials; you will get an Amazon Service Exception.

using System;

using System.Configuration;

using System.Collections.Specialized;

using System.IO;

using Amazon.S3;

using Amazon.S3.Model;

namespace s3.amazon.com.docsamples.retrieveobject

{

class S3Sample

{

static string bucketName = "text-content";

static string keyName = "text-object.txt";

static IAmazonS3 client;

public static void Main(string[] args) {

NameValueCollection appConfig = ConfigurationManager.AppSettings;

string responseBody;

try {

using (client = Amazon.AWSClientFactory.CreateAmazonS3Client(RegionEnd

point.USWest2)) {

Console.WriteLine("Retrieving (getting) an object");

GetObjectRequest request = new GetObjectRequest() {

BucketName = bucketName,

Key = keyName

};

Version v2.0.0

AWS SDK for .NET Developer Guide

Walkthrough: Using IAM Roles to Retrieve an Amazon

S3 Object from an Amazon EC2 Instance