.NET 7 Minimal API中OpenTelemetry AttachLogsToActivityEvent丢失FormattedMessage

使用OpenTelemetry.Contrib.Preview包将ILogger独立日志附加为Activity Events（即Trace事件），实现日志与Trace关联，以便在Jaeger等工具中统一展示。按照文档要求，已在日志配置中调用AttachLogsToActivityEvent并设置IncludeFormattedMessage = true，但日志成功附加到Activity后，仅记录了CategoryName、LogLevel和EventId三个默认属性，实际的FormattedMessage并未被记录。尝试过相关问题的解决方案但无效，已提交问题到对应仓库。

项目csproj文件 #

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

  <PropertyGroup>
    <TargetFramework>net7.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0-*" />
    <PackageReference Include="Asp.Versioning.Mvc.ApiExplorer" Version="7.0.0" />

    <PackageReference Include="OpenTelemetry.Contrib.Preview" Version="1.0.0-beta2" />
    <PackageReference Include="OpenTelemetry.Exporter.Console" Version="1.4.0-rc.1" />
    <PackageReference Include="OpenTelemetry.Exporter.Jaeger" Version="1.4.0-rc.1" />
    <PackageReference Include="OpenTelemetry.Exporter.Prometheus.AspNetCore" Version="1.4.0-rc.1" />
    <PackageReference Include="OpenTelemetry.Exporter.Prometheus.HttpListener" Version="1.4.0-rc.1" />
    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.4.0-rc.1" />
    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol.Logs" Version="1.4.0-rc.1" />
    <PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.4.0-rc.1" />
    <PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.0.0-rc9.10" />
    <PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.0.0-rc9.10" />
    <PackageReference Include="OpenTelemetry.Instrumentation.Runtime" Version="1.1.0-beta.2" />
  </ItemGroup>

</Project>

Program.cs文件 #

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using OpenTelemetry;
using OpenTelemetry.Exporter;
using OpenTelemetry.Instrumentation.AspNetCore;
using OpenTelemetry.Logs;
using OpenTelemetry.Resources;
using OpenTelemetry.Trace;
using System;

var builder = WebApplication.CreateBuilder(args);
var services = builder.Services;

services.AddProblemDetails();
services.AddEndpointsApiExplorer();
services.AddApiVersioning(options => options.ReportApiVersions = true)
        .AddApiExplorer(
            options =>
            {
                options.GroupNameFormat = "'v'VVV";
                options.SubstituteApiVersionInUrl = true;
            })
        .EnableApiVersionBinding();
services.AddSwaggerGen();

builder.Services.Configure<AspNetCoreInstrumentationOptions>(options => options.RecordException = true);
var resource = ResourceBuilder.CreateDefault().AddService("MyService");
builder.Services
        .AddOpenTelemetry()
        .ConfigureResource(ConfigureResource)
        .WithTracing(o =>
        {
            o.SetSampler(new TraceIdRatioBasedSampler(1.0))
             .AddSource("MyService")
             .AddAspNetCoreInstrumentation(option => option.RecordException = true)
             .AddHttpClientInstrumentation();
            o.AddConsoleExporter(o => o.Targets = ConsoleExporterOutputTargets.Console);
        }).StartWithHost();

builder.Logging.ClearProviders();
builder.Logging.Configure(o => o.ActivityTrackingOptions = ActivityTrackingOptions.SpanId | ActivityTrackingOptions.TraceId | ActivityTrackingOptions.ParentId);
builder.Logging.AddFilter<OpenTelemetryLoggerProvider>("*", LogLevel.Information);
builder.Logging
    .AddOpenTelemetry(loggerOptions =>
    {
        loggerOptions.SetResourceBuilder(resource);
        loggerOptions.IncludeFormattedMessage = true;
        loggerOptions.IncludeScopes = true;
        loggerOptions.ParseStateValues = true;
        loggerOptions.AddConsoleExporter();
        loggerOptions.AttachLogsToActivityEvent();
    });

var app = builder.Build();

var common = app.NewVersionedApi("Common");
var commonV1 = common.MapGroup("/api/v{version:apiVersion}/common").HasApiVersion(1.0);
commonV1.MapGet("/", (ILogger<Program> logger) =>
{
    logger.LogInformation("Calling hello world api!");
    return Results.Ok("Hello World common v1!");
});

app.UseSwagger();
app.UseSwaggerUI(
    options =>
    {
        var descriptions = app.DescribeApiVersions();
        foreach (var description in descriptions)
        {
            var url = $"/swagger/{description.GroupName}/swagger.json";
            var name = description.GroupName.ToUpperInvariant();
            options.SwaggerEndpoint(url, name);
        }
    });

app.Run();

static void ConfigureResource(ResourceBuilder r) => r.AddService(
            serviceName: "MyService",
            serviceVersion: "1.0.0",
            serviceInstanceId: Environment.MachineName);

运行程序并调用端点后，Activity已记录附加的日志事件，但未包含实际的FormattedMessage属性。

内容的提问来源于stack exchange，提问作者SanjayD