Application Insights 中缺少某些 Azure 函数日志

Question

将我们的其中一个Azure Functions（v4）升级到.NET 8和隔离的worker后，我们遇到了一些日志记录问题； 某些（不是全部）错误级别日志仅出现在“App Insights 日志”的函数日志流中，而不出现在 Application Insights 跟踪日志中。

请注意，采样已（或应该）禁用，参考。 Azure 函数应用程序并不总是将日志发送到应用程序洞察。

在本地运行应用程序并将其连接到 Application Insights 时，查询跟踪时会显示所有日志。

程序.cs：

var host = new HostBuilder()
    .ConfigureFunctionsWebApplication()
    .ConfigureServices(services =>
    {
        // Other service configurations not included
        services.ConfigureFunctionsApplicationInsights();
        services.AddApplicationInsightsTelemetryWorkerService();
    })
    .ConfigureLogging(logging =>
    {
    logging.Services.Configure<LoggerFilterOptions>(options =>
    {
            var defaultRule = options.Rules.FirstOrDefault(rule =>
                  rule.ProviderName == "Microsoft.Extensions.Logging.ApplicationInsights.ApplicationInsightsLoggerProvider");
            if (defaultRule is not null)
            {
                options.Rules.Remove(defaultRule);
            }
        });
    })
    .Build();

host.Run();

主机.json：

{
  "version": "2.0",
  "logging": {
    "logLevel": {
      "default": "Warning",
      "Function": "Information",
      "<project-namespace>": "Information"
    },
    "applicationInsights": {
      "samplingSettings": {
        "isEnabled": false
      }
    }
  }
}

编辑 - 添加了日志流和应用程序洞察日志的屏幕截图。

Answer 1

某些（不是全部）错误级别日志仅出现在“App Insights 日志”的函数日志流中，而不出现在 Application Insights 跟踪日志中。

通过使用 Http 触发功能和运行时堆栈 .NET 8.0 隔离获取所有类型的日志，包括应用程序洞察中的错误日志。检查以下代码和配置：

功能代码：

public class Function1
{
    private readonly ILogger<Function1> _logger;

    public Function1(ILogger<Function1> logger)
    {
        _logger = logger;
    }

    [Function("Function1")]
    public IActionResult Run([HttpTrigger(AuthorizationLevel.Function, "get", "post")] HttpRequest req)
    {
        _logger.LogTrace("this is Trace log");
        _logger.LogDebug("this is Debug log");
        _logger.LogWarning("this is Warning log");
        _logger.LogError("this is Error log");
        _logger.LogInformation("C# HTTP trigger function processed a request.");
        return new OkObjectResult("Welcome to Azure Functions!");
    }
}

.cs 项目：

<FrameworkReference Include="Microsoft.AspNetCore.App" />
<PackageReference Include="Microsoft.Azure.Functions.Worker" Version="1.21.0" />
<PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.1.0" />
<PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http.AspNetCore" Version="1.2.0" />
<PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="1.17.0" />
<PackageReference Include="Microsoft.ApplicationInsights.WorkerService" Version="2.22.0" />
<PackageReference Include="Microsoft.Azure.Functions.Worker.ApplicationInsights" Version="1.2.0" />

程序.cs：

var host = new HostBuilder()
    .ConfigureFunctionsWebApplication()
    .ConfigureServices(services =>
    {
        services.AddApplicationInsightsTelemetryWorkerService();
        services.ConfigureFunctionsApplicationInsights();
        services.Configure<LoggerFilterOptions>(options =>
        {
            LoggerFilterRule toRemove = options.Rules.FirstOrDefault(rule => rule.ProviderName
                == "Microsoft.Extensions.Logging.ApplicationInsights.ApplicationInsightsLoggerProvider");

            if (toRemove is not null)
            {
                options.Rules.Remove(toRemove);
            }
        });
    })
    .ConfigureAppConfiguration((hostContext, config) =>
    {
        config.AddJsonFile("host.json", optional: true);
    })
    .ConfigureLogging((hostingContext, logging) =>
    {
        logging.AddApplicationInsights(console =>
        {
            console.IncludeScopes = true;
        });

        logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));
    })
    .Build();

host.Run();

主持人。 json:

{
  "version": "2.0",
  "logging": {
    "logLevel": {
      "default": "Trace"
    },
    "applicationInsights": {
      "samplingSettings": {
        "isEnabled": true,
        "excludedTypes": "Request"

      },
      "enableLiveMetricsFilters": true
    }
  }
}

函数在本地运行成功。

输出：

• 在应用程序洞察中检查以下跟踪日志。