Application Insights 不捕获信息级日志记录

Question

我有一个简单的 Asp.Net Core Web API 应用程序。对于这个例子，我遵循了这里的官方文档：https://docs.microsoft.com/en-us/azure/azure-monitor/app/asp-net-core

.csproj

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.18.0" />
    <PackageReference Include="Swashbuckle.AspNetCore" Version="5.6.3" />
  </ItemGroup>

</Project>

appsettings.json

{
  "ApplicationInsights": {
    "LogLevel": {
      "Default": "Information"
    },
    "InstrumentationKey": "my-instrumentation-key",
    "EnableAdaptiveSampling": false,
    "EnablePerformanceCounterCollectionModule": false
  },
  "Logging": {
    "LogLevel": {
      "Default": "Information"
    }
  },
  "AllowedHosts": "*"
}

Startup.cs

        public void ConfigureServices(IServiceCollection services)
        {

            services.AddControllers();
            services.AddSwaggerGen(c =>
            {
                c.SwaggerDoc("v1", new OpenApiInfo { Title = "WebApiMonitoring", Version = "v1" });
            });

            services.AddApplicationInsightsTelemetry();
        }

Controller.cs

        [HttpGet]
        public IEnumerable<WeatherForecast> Get()
        {
            var now = DateTime.Now;

            _logger.LogTrace("--- {time}: Logging LogTrace. Value {value}", now, 0);
            _logger.LogDebug("--- {time}: Logging LogDebug. Value {value}", now, 1);
            _logger.LogInformation("--- {time}: Logging LogInformation. Value {value}", now, 2);
            _logger.LogWarning("--- {time}: Logging LogWarning. Value {value}", now, 3);
            _logger.LogError("--- {time}: Logging LogError. Value {value}", now, 4);
            _logger.LogCritical("--- {time}: Logging LogCritical. Value {value}", now, 5);

            var rng = new Random();
            return Enumerable.Range(1, 5).Select(index => new WeatherForecast
            {
                Date = DateTime.Now.AddDays(index),
                TemperatureC = rng.Next(-20, 55),
                Summary = Summaries[rng.Next(Summaries.Length)]
            })
            .ToArray();
        }

当 运行 在本地应用程序时，我可以按预期看到所有日志级别。

但针对同一请求的 Application Insights 仅捕获警告级别及更高级别的日志。下图来自 Application Insights 中的实时指标。

在 Application Insights 中查询日志时也是如此。

应用程序记录信息级别并被 Application Insights 捕获还需要什么？

Answer 1

您的配置有误。需要在 Logging 部分下指定 LogLevel

{
  "ApplicationInsights": {
    "LogLevel": {
      "Default": "Information"
    },
    "InstrumentationKey": "my-instrumentation-key",
    "EnableAdaptiveSampling": false,
    "EnablePerformanceCounterCollectionModule": false
  },
  "Logging": {
    "LogLevel": {
      "Default": "Information"
    }
  },
  "AllowedHosts": "*"
}

有效的配置是

{
  "ApplicationInsights": {
    "InstrumentationKey": "my-instrumentation-key",
    "EnableAdaptiveSampling": false,
    "EnablePerformanceCounterCollectionModule": false
  },
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    },
    "ApplicationInsights": {
      "LogLevel": {
        "Default": "Information"
      }
    }
  }
}

见the docs