amazon-web-services - 移动到应用程序负载均衡器后面的 AWS fargate 后 SignalR 握手问题

Question

移动到应用程序负载均衡器后面的 AWS fargate 后 SignalR 握手问题。

在我使用 nginx 在 EC2 实例上运行之前，在遵循此建议后运行良好； ASP.NET Core 中的 SignalR 在 Nginx 后面。但由于某些原因，我们不得不将其移至 AWS fargate 并使用 Aws 应用程序负载均衡器 (ALB)。现在我们无法让 signalR 启动并运行。该服务有一个工作正常的 REST api。

而且我仍然可以切换回旧的基础设施，这就像一个魅力。

从颤振应用程序我得到这个：

flutter: [Signals] Connection Restarting after http error - 404 - Not Found
flutter: [Signals] Connection Closed - Cannot start a connection that is not in the 'Disconnected' state.
flutter: [Signals] [Transport] SEVERE: : Server returned handshake error: 'Handshake was canceled.'
flutter: [Signals] [Hub] SEVERE:  Server returned handshake error: 'Handshake was canceled.'
[VERBOSE-2:ui_dart_state.cc(157)] Unhandled Exception: type 'GeneralError' is not a subtype of type 'Error'
0      ServerSentEventsTransport.connect.<anonymous closure> 
package:signalr_client/server_sent_events_transport.dart:73
1      _rootRunUnary  (dart:async/zone.dart:1192:38)
2      _CustomZone.runUnary  (dart:async/zone.dart:1085:19)
3      _CustomZone.runUnaryGuarded  (dart:async/zone.dart:987:7)
4      _BufferingStreamSubscription._sendData  (dart:async/stream_impl.dart:339:11)
5      _DelayedData.perform  (dart:async/stream_impl.dart:594:14)
6      _StreamImplEvents.handleNext  (dart:async/stream_impl.dart:710:11)
7      _PendingEvents.schedule.<anonymous closure>  (dart:async/stream_impl.dart:670:7)
8      _rootRun  (dart:async/zone.dart:1180:38)
9      _CustomZone.run  (dart:async/zone.dart:1077:19)
10     _CustomZone.runGuarded  (dart:async/zone.dart:979:7)
11     _CustomZone.bindCallbackGuarded.<anonymous closure>  (dart:async/zone.dart:1019:23)
12     _rootRun (dart:async/zone.da<…&gt;
[VERBOSE-2:ui_dart_state.cc(157)] Unhandled Exception: Server returned handshake error: 'Handshake was canceled.'
flutter: [Signals] [Transport] SEVERE:Connection disconnected with error 'Server returned handshake error: 'Handshake was canceled.''.
flutter: [Signals] [Hub] SEVERE: Connection disconnected with error 'Server returned handshake error: 'Handshake was canceled.''.
flutter: [Signals] Connection Closed - Server returned handshake error: 'Handshake was canceled.'

和这个：

flutter: [Signals] [Transport] SEVERE: 2020-05-28 14:10:11.870554: Failed to start the transport 'HttpTransportType.WebSockets': WebSocketException: Connection to 'https://api.com:0/hubs/people?id=[id]&access_token=[Token] was not upgraded to websocket

它看起来类似于我们在 nginx 中解决的问题，但我认为 AWS ALB 应该默认处理它。如果我在本地运行该服务，它工作正常。

我们用：

• 使用这个 signalR 客户端颤振：https ://github.com/soernt/signalr_client
• API：目标框架：
• netcoreapp2.1 Docker：mcr.microsoft.com/dotnet/core/aspnet:2.1-alpine
• Microsoft.AspNetCore.SignalR.Protocols.MessagePack：1.0.0

提前致谢

标签： amazon-web-services.net-coresignalraws-application-load-balancersignalr-client