ILogger 实例未在预编译 Azure 函数的参数中初始化

Question

我在 Visual Studio 2017 年用 C# 编写了一个预编译的 Azure Function 项目，遵循 here or here. I want to replace TraceWriter logging with Application Insights logging through the Microsoft.Extensions.Logging.ILogger interface. For that I updated the Microsoft.Azure.WebJobs Nuget package to version 2.1.0-beta1, which includes the ILogger 绑定描述的步骤，可以直接绑定到 Application Insights 记录器。我还使用有效的 Application Insights 检测密钥添加了应用程序设置 APPINSIGHTS_INSTRUMENTATIONKEY。用 ILogger 参数替换函数的 TraceWriter 参数后，我触发了函数并得到以下错误响应：

{
    "id": "497256d0-1c3a-4a10-a1cc-41b771305338",
    "requestId": "e546219e-7e38-4fa7-80cf-b06e0b8f4018",
    "statusCode": 500,
    "errorCode": 0,
    "messsage": "Exception while executing function: Functions.HelloHttpTrigger -> Exception binding parameter 'log' -> No value was provided for parameter 'log'.",
    "errorDetails": "Microsoft.Azure.WebJobs.Host.FunctionInvocationException : Exception while executing function: Functions.HelloHttpTrigger ---> System.InvalidOperationException : Exception binding parameter 'log' ---> System.InvalidOperationException : No value was provided for parameter 'log'.\r\n   at Microsoft.Azure.WebJobs.Host.Bindings.Invoke.ClassInvokeBinding`1.BindAsync(BindingContext context)\r\n   at async Microsoft.Azure.WebJobs.Host.Triggers.TriggeredFunctionBinding`1.BindCoreAsync[TTriggerValue](ValueBindingContext context,Object value,IDictionary`2 parameters) \r\n   End of inner exception\r\n   at Microsoft.Azure.WebJobs.Host.Executors.DelayedException.Throw()\r\n   at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithWatchersAsync(IFunctionInstance instance,IReadOnlyDictionary`2 parameters,TraceWriter traceWriter,CancellationTokenSource functionCancellationTokenSource)\r\n   at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(??)\r\n   at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(??) \r\n   End of inner exception\r\n   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n   at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.ExecuteWithLoggingAsync(??)\r\n   at async Microsoft.Azure.WebJobs.Host.Executors.FunctionExecutor.TryExecuteAsync(IFunctionInstance functionInstance,CancellationToken cancellationToken)\r\n   at Microsoft.Azure.WebJobs.Host.Executors.ExceptionDispatchInfoDelayedException.Throw()\r\n   at async Microsoft.Azure.WebJobs.JobHost.CallAsyncCore(MethodInfo method,IDictionary`2 arguments,CancellationToken cancellationToken)\r\n   at async Microsoft.Azure.WebJobs.Script.ScriptHost.CallAsync(String method,Dictionary`2 arguments,CancellationToken cancellationToken)\r\n   at async Microsoft.Azure.WebJobs.Script.WebHost.WebScriptHostManager.HandleRequestAsync(FunctionDescriptor function,HttpRequestMessage request,CancellationToken cancellationToken)\r\n   at async Microsoft.Azure.WebJobs.Script.WebHost.Controllers.FunctionsController.ExecuteAsync(HttpControllerContext controllerContext,CancellationToken cancellationToken)\r\n   at async System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsync(HttpRequestMessage request,CancellationToken cancellationToken)\r\n   at async System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsync(HttpRequestMessage request,CancellationToken cancellationToken)\r\n   at async Microsoft.Azure.WebJobs.Script.WebHost.Handlers.SystemTraceHandler.SendAsync(HttpRequestMessage request,CancellationToken cancellationToken)\r\n   at async Microsoft.Azure.WebJobs.Script.WebHost.Handlers.WebScriptHostHandler.SendAsync(HttpRequestMessage request,CancellationToken cancellationToken)\r\n   at async System.Web.Http.HttpServer.SendAsync(HttpRequestMessage request,CancellationToken cancellationToken)"
}

因此无法创建 ILogger 的实例。但是，如果我使用函数脚本而不是预编译函数创建项目，那么 ILogger 实例将被正确实例化。这是否意味着 ILogger 的实例化仅适用于函数脚本？我希望情况并非如此，那么我应该在我的预编译函数的设置中添加什么才能使其正常工作？

Answer 1

如 Mikhail 指出的答案所示，我必须下载 Nuget 包 Microsoft.NET.Sdk.Functions v1.0.4。但是为了能够安装它，我必须安装软件包 Microsoft.Azure.WebJobs 和 Microsoft.Azure.WebJobs.Extensions 的版本 2.1.0-beta4；和 Microsoft.Azure.Webjobs.Extensions.Http 的 1.0.0-beta4 版。为了构建项目，我必须在项目文件中添加 <Target Name="RunResolvePublishAssemblies" />。

Answer 2

我刚刚在尝试在 Azure 上使用 Microsoft.NET.Sdk.Functions@1.0.14 运行获取 .net Core 2.1 函数应用时遇到了这个问题。

我需要在应用程序设置中将 FUNCTIONS_EXTENSION_VERSION 设置为 beta。您可以在 Azure 门户中执行此操作。

有人提到了这个。

ILogger 实例未在预编译 Azure 函数的参数中初始化

ILogger instance not initialized in parameter of precompiled Azure function

azure

azure-webjobs

azure-webjobssdk

azure-functions