Question

我一直致力于亚马逊EC2项目，当我这样登录时：

public bool Login(Credentials credentials, string ownerID, string region)
{
    try
    {
        OwnerID = ownerID;
        CurrentCredentials = credentials;
        CurrentConfigs = new AmazonEC2Config() { RegionEndpoint = RegionEndpoint.GetBySystemName(region) };
        EC2 = AWSClientFactory.CreateAmazonEC2Client(CurrentCredentials, CurrentConfigs);
    }
    catch
    {
        return false;
    }
    return true;
}

然后尝试像这样访问：

DescribeInstancesRequest ec2Request = new DescribeInstancesRequest();
ec2Request.InstanceIds = new List<string>() { id };
DescribeInstancesResponse ec2Response = EC2.DescribeInstances(ec2Request);
return ec2Response.Reservations[0].Instances[0];

我得到了这个例外：

例外：

Encountered a WebException (NameResolutionFailure), the request cannot be retried. Either the maximum number of retries has been exceeded (4/4) or the request is using a non-seekable stream.

STACK TRACE：

at Amazon.Runtime.AmazonWebServiceClient.HandleHttpWebErrorResponse(AsyncResult asyncResult, WebException we)
at Amazon.Runtime.AmazonWebServiceClient.getRequestStreamCallback(IAsyncResult result)
at Amazon.Runtime.AmazonWebServiceClient.endOperation[T](IAsyncResult result)
at Amazon.EC2.AmazonEC2Client.DescribeInstances(DescribeInstancesRequest describeInstancesRequest)
at ...

修改

此异常的内部异常是：

The remote name could not be resolved: 'ec2.sa-east-1a.amazonaws.com'

重要的是要指出，当访问区域 sa-east-1a 时，它只会给我这个错误。我在区域 us-west-2 中拥有的另一个帐户完美无缺。另外，我从web.config

中提取了Credential和Region信息

Answer 1

简单错误，简单解决方案：该区域 sa-east-1 而不是 sa-east-1a 。登录时，您不应指定要使用的数据中心，而只是指定区域。

Answer 2

作为附录，对于到达此处未指定数据中心的任何人。在我的情况下，使用RegionEndpoint.GetBySystemName("USEast1") vs RegionEndpoint.GetBySystemName("US-East-1")是差异制造者。

亚马逊AWS：无法登录

2 个答案: