Question

我已经下载了适用于C＃的Amazon AWS SDK，我可以访问运行Eucalyptus的私有云的EC2部分，我可以列出，图像，实例，区域......

这很好用：

AmazonEC2 ec2 = AWSClientFactory.CreateAmazonEC2Client("abcdefghijklmnopqrstuvwxyz1234567890", "abcdefghijklmnopqrstuvwxyz1234567890", new AmazonEC2Config().WithServiceURL("http://10.140.54.12:8773/services/Eucalyptus"));

DescribeInstancesRequest ec2Request = new DescribeInstancesRequest();
try
{
    DescribeInstancesResponse ec2Response = ec2.DescribeInstances(ec2Request);
    int numInstances = 0;
    numInstances = ec2Response.DescribeInstancesResult.Reservation.Count;
    textBoxInstancesLog.AppendText("You have " + numInstances + " running instances");
    textBoxInstancesLog.AppendText(ec2Response.ToString());
}
catch (Exception ex)
{
    MessageBox.Show(ex.ToString());
}

但我需要访问Cloud的Walrus（S3）部分。这就是我尝试访问Walrus的方式，代码几乎完全相同，但是通过这个调用我会得到一个例外。

这不起作用：

AmazonS3 s3 = AWSClientFactory.CreateAmazonS3Client("abcdefghijklmnopqrstuvwxyz1234567890", "abcdefghijklmnopqrstuvwxyz1234567890", new AmazonS3Config().WithServiceURL("http://10.140.54.12:8773/services/Walrus"));
ListBucketsRequest s3Request = new ListBucketsRequest();
try
{
    ListBucketsResponse s3Response = s3.ListBuckets(s3Request);
    textBoxS3Log.AppendText(s3Response.ToString());
}
catch (Exception ex)
{
    MessageBox.Show(ex.ToString());
}

我会收到这个例外：

System.Net.WebException: The remote name could not be resolved: 'http'
   at Amazon.S3.AmazonS3Client.processRequestError(String actionName, HttpWebRequest request, WebException we, HttpWebResponse errorResponse, String requestAddr, WebHeaderCollection& respHdrs, Type t, Exception& cause)
   at Amazon.S3.AmazonS3Client.handleHttpWebErrorResponse(S3Request userRequest, WebException we, HttpWebRequest request, HttpWebResponse httpResponse, Exception& cause, HttpStatusCode& statusCode)
   at Amazon.S3.AmazonS3Client.getResponseCallback[T](IAsyncResult result)
   at Amazon.S3.AmazonS3Client.endOperation[T](IAsyncResult result)
   at Amazon.S3.AmazonS3Client.ListBuckets(ListBucketsRequest request)
   at IAASClient.FormMain.buttonS3Test_Click(Object sender, EventArgs e) in X:\work\IAASClient\FormMain.cs:line 107

来自Eucalyptus网站：

Eucalyptus实现了IaaS （基础设施即服务）私有可通过API访问的云与Amazon EC2和Amazon兼容 S3

我错过了什么？

注意：相同的代码与Amazon S3完美配合，问题是访问Eucalyptus Walrus。

Answer 1

您可以使用当前的Amazon AWS SDK for C＃访问Walrus。如果你的Walrus URL包含像...这样的路径组件，它就不会像你期望的那样工作。

http://eucalyptus.test.local:8773/services/Walrus

以下是设置AmazonS3Client和请求的方法。请注意，服务URL的路径部分将被放入bucketname。

我已使用预先指定的URL和DeleteObjectRequest测试了此设置。我正在使用来自https://github.com/aws/aws-sdk-net

的SDK的1.5.19.0版

var config = new Amazon.S3.AmazonS3Config
                {
                    ServiceURL = "eucalyptus.test.local:8773",
                    CommunicationProtocol = Protocol.HTTP
                };

            var client = new Amazon.S3.AmazonS3Client("XXXXXXXXXXXXXXXXXXKEY", "XXXXXXXXXXXXXXXXXXXXXXXXXXXXSECRET", config);
            var response = client.GetPreSignedURL(
                new GetPreSignedUrlRequest().WithBucketName("services/Walrus/BucketName")
                                            .WithExpires(DateTime.UtcNow.AddHours(10))
                                            .WithProtocol(Protocol.HTTP)
                                            .WithVerb(HttpVerb.PUT)
                                            .WithKey("video.mp4"));

Answer 2

AWSSDK for .NET似乎并不理解ServiceUrls中的端口号...我刚刚在SimpleDB客户端代码中为此编写了一个补丁，但我实际上并没有在S3客户端中查看它。 ..

您可以尝试在端口80上临时托管您的Walrus服务并重新测试以验证这是否是问题所在。

如何使用适用于C＃的Amazon AWS SDK访问Eucalyptus Walrus（S3）

2 个答案: