amazon-web-services – 使用EMR集群和其他帐户的s3文件运行作业

2023年9月5日 358次阅读

我想知道是否有办法从另一个帐户的s3访问jar文件和输入和输出位置.我在帐户1上运行了我的EMR集群.我想从帐户2的s3访问文件和jar位置.我正在使用AWS SDK启动AWS Simple工作流程.谢谢. 最佳答案 您需要为跨帐户访问创建角色：

http://docs.aws.amazon.com/IAM/latest/UserGuide/delegation-cross-acct-access.html

您可以使用IAM角色建立跨帐户访问权限.您可以在帐户2中定义一个角色,该角色可以由帐户1中的用户(IAM用户或联合用户)承担.使用角色进行跨帐户访问可以授予对帐户2中任何资源的访问权限(在您的情况下,它是S3)

编辑：

首先需要创建一个具有对帐户2中S3的读写访问权限的角色(让我们将其命名为“S3-ReadWrite-role”),并允许来自帐户1的用户使用角色“S3-ReadWrite-role”

检查此链接,它将向您解释如何执行此操作：
http://blogs.aws.amazon.com/security/post/TxC24FI9IDXTY1/Delegating-API-Access-to-AWS-Services-Using-IAM-span-class-matches-Roles-span

完成第一步后,您可以使用此代码(未测试)：
使用您的凭据,您将收到临时安全凭证以使用“S3-ReadWrite-role”,然后您将使用临时安全凭证来访问S3;)

import java.util.HashMap;

import com.amazonaws.services.securitytoken.AWSSecurityTokenServiceClient;
import com.amazonaws.services.securitytoken.model.AssumeRoleRequest;
import com.amazonaws.services.securitytoken.model.AssumeRoleResult;
import com.amazonaws.services.dynamodb.AmazonDynamoDBClient;
import com.amazonaws.services.dynamodb.model.*;
import com.amazonaws.auth.*;

public class AssumeRoleDemo {
    private static final String ROLE_ARN =
    "arn:aws:iam::111122223333:role/S3-ReadWrite-role";

    private static AWSCredentials longTermCredentials_;

    private static void init() throws Exception {
    // acquire long term credentials from the properties file ( you should use this method)
    //longTermCredentials_ = new PropertiesCredentials(AssumeRoleDemo.class.getResourceAsStream("AwsCredentials.properties"));

    // or you can use this one
    longTermCredentials = new BasicAWSCredentials(access_key_id, secret_access_key);
}

    public static void main(String[] args) throws Exception {
        init();

       // Step 1. Use Joe.s long-term credentials to call the
       // AWS Security Token Service (STS) AssumeRole API, specifying 
       // the ARN for the role S3-RW-role in account2.

        AWSSecurityTokenServiceClient stsClient = new
          AWSSecurityTokenServiceClient(longTermCredentials_);

        AssumeRoleRequest assumeRequest = new AssumeRoleRequest()
          .withRoleArn(ROLE_ARN)
          .withDurationSeconds(3600)
          .withRoleSessionName("demo");

       AssumeRoleResult assumeResult =
           stsClient.assumeRole(assumeRequest);

      // Step 2. AssumeRole returns temporary security credentials for 
      // the IAM role.

      BasicSessionCredentials temporaryCredentials =
         new BasicSessionCredentials(
                assumeResult.getCredentials().getAccessKeyId(),
                assumeResult.getCredentials().getSecretAccessKey(),
                assumeResult.getCredentials().getSessionToken());

     // Step 3. Make S3 service calls to read data from a 
     // S3, stored in account2, using the 
     // temporary security credentials from the S3-ReadWrite-role 
     // that were returned in the previous step.

     AmazonS3 s3Client = new AmazonS3Client(temporaryCredentials);
     S3Object object = s3Client.getObject(
              new GetObjectRequest(bucketName, key));
     InputStream objectData = object.getObjectContent();
     // Process the objectData stream.
     objectData.close();

    }
}
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