.NET 7 API中OtlpExporter无法向NewRelic导出数据排查

尝试通过OtlpExporter将指标、链路追踪和日志导出至NewRelic，但未成功。在一个简单的.NET 7 API中按如下方式配置了Program.cs，现象是NewRelic上无任何数据显示。我的license key正确，启用控制台日志后未看到任何错误或警告，除代码中配置外未设置其他环境变量，请问我遗漏了什么配置？

配置代码 #

using OpenTelemetry;
using OpenTelemetry.Logs;
using OpenTelemetry.Metrics;
using OpenTelemetry.Resources;
using OpenTelemetry.Trace;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllers();
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var endpoint = new Uri("https://otlp.eu01.nr-data.net");
var exportProcessorType = ExportProcessorType.Batch;
var protocol = OpenTelemetry.Exporter.OtlpExportProtocol.Grpc;
var headers = $"api-key=aaaaaaa";


builder.Logging.AddOpenTelemetry(logging =>
{
    logging.IncludeScopes = true;

    var resourceBuilder = ResourceBuilder
        .CreateDefault()
        .AddService("WeatherForecast");

    logging.SetResourceBuilder(resourceBuilder)
    //.AddConsoleExporter()
    .AddOtlpExporter(configure =>
        {
            configure.Endpoint = endpoint;
            configure.ExportProcessorType = exportProcessorType;
            configure.Protocol = protocol;
            configure.Headers = headers;
        });
});

builder.Services.AddOpenTelemetry()
    .WithMetrics(builder => builder
            .AddAspNetCoreInstrumentation()
            //.AddConsoleExporter()
            .AddOtlpExporter(configure =>
            {
                configure.Endpoint = endpoint;
                configure.ExportProcessorType = exportProcessorType;
                configure.Protocol = protocol;
                configure.Headers = headers;
            }))
        .WithTracing(builder => builder
            .AddAspNetCoreInstrumentation()
            //.AddConsoleExporter()
            .AddOtlpExporter(configure =>
            {
                configure.Endpoint = endpoint;
                configure.ExportProcessorType = exportProcessorType;
                configure.Protocol = protocol;
                configure.Headers = headers;
            }));

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

app.Run();

• OTLP端点未指定正确端口：NewRelic的GRPC OTLP端点使用4317端口，你的URI仅填写了域名，需改为new Uri("https://otlp.eu01.nr-data.net:4317")。默认HTTPS端口是443，但NewRelic的GRPC服务监听4317，端口不匹配会导致请求无法送达。
• 未统一配置资源属性：当前仅在日志部分设置了ResourceBuilder，指标和追踪的OpenTelemetry配置未关联资源信息。需在全局OpenTelemetry配置中统一添加资源，确保服务标识被NewRelic正确识别：

  builder.Services.AddOpenTelemetry()
      .ConfigureResource(resourceBuilder => resourceBuilder
          .AddService("WeatherForecast"))
      .WithMetrics(...)
      .WithTracing(...);
  

• 批量导出处理器默认参数导致数据延迟：Batch模式下默认的10秒调度延迟和较大批量阈值可能导致数据未及时发送，可手动调整参数缩短发送间隔：

  // 日志配置示例，指标和追踪同理
  configure.BatchExportProcessorOptions = new BatchExportProcessorOptions<LogRecord>
  {
      ScheduledDelayMilliseconds = 5000, // 5秒发送一次
      MaxExportBatchSize = 256
  };
  

• 日志级别过滤限制：默认日志配置仅捕获Warning及以上级别，需确保日志级别设置为Information或更低，比如在代码中添加：

  builder.Logging.SetMinimumLevel(LogLevel.Information);
  

  或在appsettings.json中配置：

  {
    "Logging": {
      "LogLevel": {
        "Default": "Information",
        "Microsoft.AspNetCore": "Warning"
      }
    }
  }
  

• 缺少必要的NuGet包：确认已安装以下匹配版本的包：
  • OpenTelemetry.Exporter.OpenTelemetryProtocol
  • OpenTelemetry.Instrumentation.AspNetCore
  • OpenTelemetry.Extensions.Hosting

内容的提问来源于stack exchange，提问作者user729400