来自 Azure Function (.net Core 3.1) 的调试和跟踪日志在 Application Insights 中不可见

Question

我正在尝试通过 ILogger 将调试和跟踪日志获取到 Application Insights，但不幸的是，它不符合我的要求。

我已经完成了最简单的演示，并将 INFO、WARN 和 ERR 日志发送到 Application Insights - 但不低于 INFO。

我在这里发现了几个关于同一主题的帖子，但是 none 这似乎解决了我的问题。

感谢任何帮助:)

谢谢

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演示函数

public static class AIDemoConfig
{
    [FunctionName("AIDemo")]
    public static async Task<IActionResult> Run([HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req, ILogger log)
    {   
        log.LogTrace("TRACE: C# HTTP trigger function processed a request.");
        log.LogDebug("DEBUG: C# HTTP trigger function processed a request.");
        log.LogInformation("INFO: C# HTTP trigger function processed a request.");
        log.LogWarning("WARN: C# HTTP trigger function processed a request.");
        log.LogError("ERROR: C# HTTP trigger function processed a request.");

        string responseMessage = "Hello Log World";

        return new OkObjectResult(responseMessage);
    }
}

启动

public class Startup : FunctionsStartup
{
    public IConfiguration Configuration { get; }
    public Startup() { }

    public override void Configure(IFunctionsHostBuilder builder)
    {
        //Add ApplicationInsights
        string applicationInsightsInstrumentationKey = Environment.GetEnvironmentVariable("APPINSIGHTS_INSTRUMENTATIONKEY");
        if (!string.IsNullOrEmpty(applicationInsightsInstrumentationKey))
        {
            builder.Services.AddLogging(builder =>
            {
                builder.AddApplicationInsights(applicationInsightsInstrumentationKey);
                builder.SetMinimumLevel(LogLevel.Trace);
                builder.AddFilter<ApplicationInsightsLoggerProvider>(typeof(AIDemoConfig).FullName, LogLevel.Trace);
                builder.AddFilter<ApplicationInsightsLoggerProvider>("Microsoft", LogLevel.Error);
            });

            builder.Services.AddApplicationInsightsTelemetry();
        }

        builder.Services.AddMvcCore();
        builder.Services.AddOptions();
    }
}

appsettings.json

{
  "Values": {
    "APPINSIGHTS_INSTRUMENTATIONKEY": "4e0bfb46-68a4-4622-942a-0f80920a82a9"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Debug",
      "System": "Warning",
      "Microsoft": "Information"
    },
    "ApplicationInsights": {
      "LogLevel": {
        "Default": "Debug"
      }
    }
  }
}

Answer 1

恐怕您还需要检查 host.json 文件，因为 this section 介绍了如何设置日志级别，如下所示：

For logs of Host.Results or Function, only log events at Error or a higher level.

{
  "logging": {
    "fileLoggingMode": "always",
    "logLevel": {
      "default": "Information",
      "Host.Results": "Error",
      "Function": "Error",
      "Host.Aggregator": "Trace"
    }
  }
}

来自 Azure Function (.net Core 3.1) 的调试和跟踪日志在 Application Insights 中不可见

Debug and Trace logs from Azure Function (.net Core 3.1) not visible in Application Insights

c#

trace

azure-functions

ilogger