azure - 如何从另一个模块调用物联网边缘代理上的直接方法？

Question

我正在尝试 1.0.10-rc2 的实验性功能。

edgeAgent UploadModuleLogs 上有一个直接的方法。

我可以从 Azure 门户调用该方法，并且工作正常。 我正在尝试从同一设备上的模块调用该方法，如下所示:

static async Task Init()
{
...

  await ioTHubModuleClient.SetMethodHandlerAsync("UploadModuleLogs", UploadModuleLogs, ioTHubModuleClient);
}

private static async Task<MethodResponse> UploadModuleLogs(MethodRequest methodRequest, object userContext)
{
  ModuleClient ioTHubModuleClient = (ModuleClient)userContext;

  // Upload logs
  Console.WriteLine("Invoking method On edgeAgent");

  var payload = @"{
""schemaVersion"": ""1.0"",
""sasUrl"": ""https://..."",
""items"": [
    {
        ""id"": "".*"", 
        ""filter"": {
            ""tail"": 100
        }
    }
],
""encoding"": ""none"", 
""contentType"": ""text""
} ";

  MethodRequest request = new MethodRequest("UploadModuleLogs", Encoding.UTF8.GetBytes(payload));

  string myModuleId = Environment.GetEnvironmentVariable("IOTEDGE_MODULEID");
  string myDeviceId = Environment.GetEnvironmentVariable("IOTEDGE_DEVICEID");

  Console.WriteLine($"{myDeviceId} {myModuleId} - UploadModuleLogs method request at {DateTime.Now}");
  //Console.WriteLine($"{request.DataAsJson}");

  try
  {
    var response = await ioTHubModuleClient.InvokeMethodAsync(myDeviceId, "$edgeAgent", request).ConfigureAwait(false);
    Console.WriteLine($"Received response with status: {response.Status} with message: {response.ResultAsJson}");

    return response;
  }
  catch (Exception ex)
  {
    Console.WriteLine($"Error invoking method {ex}");
  }

  return null;

尝试运行此:

调用方法 Microsoft.Azure.Devices.Client.Exceptions.DeviceNotFoundException 时出错:设备 {"message":"Client myDeviceName/$edgeAgent not found"} 未注册 在 Microsoft.Azure.Devices.Client.Transport.HttpClientHelper.ExecuteAsync(HttpMethod httpMethod, Uri requestUri, Func3modifyRequestMessageAsync, Func2 isSuccessful, Func3 processResponseMessageAsync, IDictionary2 errorMappingOverrides , CancellationToken 取消 token ) 在 Microsoft.Azure.Devices.Client.Transport.HttpClientHelper.PostAsync[T1,T2](Uri requestUri，T1 实体，IDictionary2 errorMappingOverrides，IDictionary2 customHeaders，CancellationToken CancellationToken) 在 Microsoft.Azure.Devices.Client.ModuleClient.InvokeMethodAsync(Uri uri, MethodRequest methodRequest, CancellationToken CancellationToken)

Answer 1

这是预期的行为，其他模块无法调用边缘代理的直接方法。边缘代理在设计上并未连接到edgeHub，因为代理的直接方法具有特权并且需要服务信用才能访问。