c# - Appsettings Json 中的 ILoggingBuilder 日志记录 LogLevel 似乎未在 Azure 日志流或 Blob 日志中得到确认

Question

我创建了一个新的 .net core 2.1 Web 应用程序并部署到 Azure，日志流和应用程序日志记录到 Blob 存储似乎不支持我的日志记录配置。

我在 Visual Studio 2019 中使用新项目为 .net core 2.1 Web 应用创建了一个新解决方案。在家庭 Controller 索引路由中，我们添加了一行记录一些信息，如下所示:

private readonly ILogger<HomeController> _logger;

public HomeController(ILogger<HomeController> logger)
{
    _logger = logger;
}

public IActionResult Index()
{
    _logger.LogInformation("=========================================");
    _logger.LogError("=========================================");
    return View();
}

在 appsettings.Development.json 中，我们将系统和 Microsoft 的 LogLevel 设置为“错误”。

我期望 Azure 中的行为与本地运行时的行为相同。在本地访问索引路由并将系统和 Microsoft 的 appsettings.Development.json LogLevel 设置为“信息”时，我们在调试输出窗口中看到此输出:

Microsoft.AspNetCore.Hosting.Internal.WebHost:Information: Request starting HTTP/1.1 GET http//localhost:44378/
Microsoft.AspNetCore.Authentication.Cookies.CookieAuthenticationHandler:Information: Identity.Application was not authenticated. Failure message: Unprotect ticket failed Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker:Information: Route matched with {action = "Index", controller = "Home", page = "", area = ""}. Executing controller action with signature Microsoft.AspNetCore.Mvc.IActionResult Index() on controller LoggingTest.Controllers.HomeController (LoggingTest). Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker:Information: Executing action method LoggingTest.Controllers.HomeController.Index (LoggingTest) - Validation state: Valid LoggingTest.Controllers.HomeController:Information: ========================================= LoggingTest.Controllers.HomeController:Error: ========================================= Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker:Information: Executed action method LoggingTest.Controllers.HomeController.Index (LoggingTest), returned result Microsoft.AspNetCore.Mvc.ViewResult in 7.9475ms. Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor:Information: Executing ViewResult, running view Index. Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor:Information: Executed ViewResult - view Index executed in 11.4824ms. Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker:Information: Executed action LoggingTest.Controllers.HomeController.Index (LoggingTest) in 37.629ms Microsoft.AspNetCore.Hosting.Internal.WebHost:Information: Request finished in 54.1369ms 200 text/html; charset=utf-8

当系统和 Microsoft 设置为“错误”时:

LoggingTest.Controllers.HomeController:Information: ========================================= LoggingTest.Controllers.HomeController:Error: .=========================================

我们希望 LogStream 和日志的输出就是这种情况。我们本质上不希望日志中包含 EfCore 和其他 Microsoft 相关信息，除非其 LogLevel“错误”。但我们希望记录“信息”级别的日志。

发布到 Azure 并将 ASPNETCORE_ENVIRONMENT 设置为开发后，以使用相同的 Appsettings 设置。调用索引后，日志流和日志的 blob 如下所示:

2019-05-17 15:57:24.844 +00:00 [Information] Microsoft.AspNetCore.Hosting.Internal.WebHost: Request starting HTTP/1.1 GET http//loggingtest20190517104201.azurewebsites.net/ 2019-05-17 15:57:24.844 +00:00 [Information] Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker: Route matched with {action = "Index", controller = "Home", page = "", area = ""}. Executing action LoggingTest.Controllers.HomeController.Index (LoggingTest) 2019-05-17 15:57:24.844 +00:00 [Information] Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker: Executing action method LoggingTest.Controllers.HomeController.Index (LoggingTest) - Validation state: Valid 2019-05-17 15:57:24.844 +00:00 [Information] LoggingTest.Controllers.HomeController: ========================================= 2019-05-17 15:57:24.845 +00:00 [Error] LoggingTest.Controllers.HomeController: ========================================= 2019-05-17 15:57:24.845 +00:00 [Information] Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker: Executed action method LoggingTest.Controllers.HomeController.Index (LoggingTest), returned result Microsoft.AspNetCore.Mvc.ViewResult in 0.0635ms. 2019-05-17 15:57:24.845 +00:00 [Information] Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor: Executing ViewResult, running view Index. 2019-05-17 15:57:24.845 +00:00 [Information] Microsoft.AspNetCore.Mvc.ViewFeatures.ViewResultExecutor: Executed ViewResult - view Index executed in 0.8902ms. 2019-05-17 15:57:24.845 +00:00 [Information] Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker: Executed action LoggingTest.Controllers.HomeController.Index (LoggingTest) in 1.0913ms 2019-05-17 15:57:24.846 +00:00 [Information] Microsoft.AspNetCore.Hosting.Internal.WebHost: Request finished in 1.4542ms 200 text/html; charset=utf-8 2019-05-17 15:57:24.941 +00:00 [Information] Microsoft.AspNetCore.Hosting.Internal.WebHost: Request starting HTTP/1.1 GET

The rest of log removed for brevity...

这是我的 appsettings.development.json 文件:

{
  "Logging": {
    "LogLevel": {
      "Default": "Debug",
      "System": "Error",
      "Microsoft": "Error"
    }
  }
}

这是我的 appsettings.json 文件:

{
  "ConnectionStrings": {
    "DefaultConnection": "Removed"
  }, 
  "AllowedHosts": "*"
}

Azure Web App 中设置的环境变量:

ASPNETCORE_ENVIRONMENT = Development

Program.cs 和 Startup.cs 未对项目模板进行修改。

public class Program
    {
        public static void Main(string[] args)
        {
            CreateWebHostBuilder(args).Build().Run();
        }

        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>();

为什么我的日志级别没有得到遵守？

Answer 1

终于能够通过将这些设置放入我的 appsettings.development.json 文件中来使其工作:

{
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Information",
      "System": "Error",
      "Microsoft": "Error"
    },
    "AzureAppServicesBlob": {
      "LogLevel": {
        "Default": "Information",
        "Microsoft": "Error",
        "System": "Error"
      }
    },
    "AzureAppServicesFile": {
      "LogLevel": {
        "Default": "Information",
        "Microsoft": "Error",
        "System": "Error"
      }
    }
  }
}