我正在尝试使用 docker 连接到本地运行的 DynamoDb:
docker run -p 8000:8000 dwmkerr/dynamodb -sharedDb
但是我不断收到标题中提到的错误。
我可以验证 DynamoDb 服务器是否正在运行且可访问。
我可以访问网址http://localhost:8000/shell/
我什至尝试使用nodejs客户端https://github.com/aaronshaf/dynamodb-admin并设法创建一些表。
但是，只有 dotnet 代码无法运行!
class Program
{
static void Main(string[] args)
{
var clientConfig = new AmazonDynamoDBConfig()
{
UseHttp = true,
LogMetrics = true,
LogResponse = true,
DisableLogging = false,
ServiceURL = "http://localhost:8000"
};
var dynamoClient = new AmazonDynamoDBClient(clientConfig);
//AWSSDK
var request = new CreateTableRequest
{
TableName = "Todo",
KeySchema = new List<KeySchemaElement> { new KeySchemaElement("Id", KeyType.HASH), },
AttributeDefinitions = new List<AttributeDefinition> { new AttributeDefinition("Id", ScalarAttributeType.N), },
ProvisionedThroughput = new ProvisionedThroughput
{
ReadCapacityUnits = 10,
WriteCapacityUnits = 5,
}
};
dynamoClient.CreateTableAsync(request).Wait();
}
}
这是完整的堆栈跟踪:
Unhandled Exception: System.AggregateException: One or more errors occurred. (A socket operation was attempted to an unreachable network) ---> System.Net.Http.HttpRequestException: A socket operation was attempted to an unreachable network ---> System.Net.Sockets.SocketException: A socket operation was attempted to an unreachable network
at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, CancellationToken cancellationToken)
--- End of inner exception stack trace ---
at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, CancellationToken cancellationToken)
at System.Threading.Tasks.ValueTask`1.get_Result()
at System.Net.Http.HttpConnectionPool.CreateConnectionAsync(HttpRequestMessage request, CancellationToken cancellationToken)
at System.Threading.Tasks.ValueTask`1.get_Result()
at System.Net.Http.HttpConnectionPool.WaitForCreatedConnectionAsync(ValueTask`1 creationTask)
at System.Threading.Tasks.ValueTask`1.get_Result()
at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken)
at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
at System.Net.Http.HttpClient.FinishSendAsyncUnbuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts)
at System.Net.Http.HttpClient.GetStringAsyncCore(Task`1 getTask)
at Amazon.Runtime.Internal.Util.AsyncHelpers.<>c__DisplayClass1_1`1.<<RunSync>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at Amazon.Runtime.Internal.Util.AsyncHelpers.ExclusiveSynchronizationContext.BeginMessageLoop() in E:\JenkinsWorkspaces\v3-trebuchet-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\Util\_mobile\AsyncHelpers.cs:line 142
at Amazon.Runtime.Internal.Util.AsyncHelpers.RunSync[T](Func`1 task) in E:\JenkinsWorkspaces\v3-trebuchet-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Internal\Util\_mobile\AsyncHelpers.cs:line 87
at Amazon.Util.AWSSDKUtils.DownloadStringContent(Uri uri, TimeSpan timeout, IWebProxy proxy) in E:\JenkinsWorkspaces\v3-trebuchet-release\AWSDotNetPublic\sdk\src\Core\Amazon.Util\AWSSDKUtils.cs:line 969
at Amazon.Util.EC2InstanceMetadata.GetItems(String relativeOrAbsolutePath, Int32 tries, Boolean slurp) in E:\JenkinsWorkspaces\v3-trebuchet-release\AWSDotNetPublic\sdk\src\Core\Amazon.Util\_bcl+coreclr\EC2InstanceMetadata.cs:line 513
at Amazon.Util.EC2InstanceMetadata.get_IAMSecurityCredentials() in E:\JenkinsWorkspaces\v3-trebuchet-release\AWSDotNetPublic\sdk\src\Core\Amazon.Util\_bcl+coreclr\EC2InstanceMetadata.cs:line 311
at Amazon.Runtime.DefaultInstanceProfileAWSCredentials.FetchCredentials() in E:\JenkinsWorkspaces\v3-trebuchet-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Credentials\_bcl+coreclr\DefaultInstanceProfileAWSCredentials.cs:line 142
at Amazon.Runtime.DefaultInstanceProfileAWSCredentials.GetCredentials() in E:\JenkinsWorkspaces\v3-trebuchet-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Credentials\_bcl+coreclr\DefaultInstanceProfileAWSCredentials.cs:line 88
at Amazon.Runtime.DefaultInstanceProfileAWSCredentials.GetCredentialsAsync() in E:\JenkinsWorkspaces\v3-trebuchet-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Credentials\_bcl+coreclr\DefaultInstanceProfileAWSCredentials.cs:line 106
at Amazon.Runtime.Internal.CredentialsRetriever.InvokeAsync[T](IExecutionContext executionContext) in E:\JenkinsWorkspaces\v3-trebuchet-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\Handlers\CredentialsRetriever.cs:line 90
at Amazon.Runtime.Internal.RetryHandler.InvokeAsync[T](IExecutionContext executionContext)
at Amazon.Runtime.Internal.RetryHandler.InvokeAsync[T](IExecutionContext executionContext) in E:\JenkinsWorkspaces\v3-trebuchet-release\AWSDotNetPublic\sdk\src\Core\Amazon.Runtime\Pipeline\RetryHandler\RetryHandler.cs:line 137
at Amazon.Runtime.Internal.CallbackHandler.InvokeAsync[T](IExecutionContext executionContext)
at Amazon.Runtime.Internal.CallbackHandler.InvokeAsync[T](IExecutionContext executionContext)
at Amazon.Runtime.Internal.ErrorCallbackHandler.InvokeAsync[T](IExecutionContext executionContext)
at Amazon.Runtime.Internal.MetricsHandler.InvokeAsync[T](IExecutionContext executionContext)
--- End of inner exception stack trace ---
at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
at System.Threading.Tasks.Task.Wait()
at test_dynamodb.Program.Main(String[] args) in G:\Test Projects\test-dynamodb\test-dynamodb\Program.cs:line 39
令人惊讶的是，它在 Mac 上运行得很好!
最佳答案
如果您以某种方式追踪堆栈，您会发现此异常不是由于 SDK 尝试连接到 DynamoDB 所致，而是由于 EC2 实例元数据 URL ( http://169.254.169.254 ) 所致。 DynamoDB 客户端尝试从 EC2 检索 IAM 角色，但在 EC2 外部运行时无法执行此操作。
我看到这个异常是从 AWSSDK.Core 版本 3.3.24.6 开始出现的，而不是过去抛出的更有意义的异常:
Amazon.Runtime.AmazonServiceException : Failed to retrieve credentials from EC2 Instance Metadata Service.
但是，问题的根本原因是您尚未为开发工具包提供 AWS 凭证。在 AWS Explorer for Visual Studio 中添加默认配置文件，或 create a credentials file ，您应该已启动并运行。
关于windows - DynamoDb SocketException : A socket operation was attempted to an unreachable network，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53176573/