ログの相関

using System;
using System.Diagnostics;
using Microsoft.Extensions.Logging;
using OpenTelemetry;
using OpenTelemetry.Logs;
using OpenTelemetry.Resources;
using OpenTelemetry.Trace;

// OpenTelemetry を使用してロガーファクトリを作成
using var loggerFactory = LoggerFactory.Create(builder =>
{
    builder.AddOpenTelemetry(options =>
    {
        options.AddConsoleExporter();
    });
});

// トレーサープロバイダーを作成
using var tracerProvider = Sdk.CreateTracerProviderBuilder()
    .AddSource("MyCompany.MyProduct.MyLibrary")
    .AddConsoleExporter()
    .Build();

// ロガーインスタンスを取得
var logger = loggerFactory.CreateLogger<Program>();

// アクティビティソースを作成
var activitySource = new ActivitySource("MyCompany.MyProduct.MyLibrary");

// アクティビティを開始
using (var activity = activitySource.StartActivity("SayHello"))
{
    // アクティビティのコンテキスト内でログを出力
    logger.FoodPriceChanged("artichoke", 9.99);
}

// 構造化ログのための拡張メソッドを定義
internal static partial class LoggerExtensions
{
    [LoggerMessage(LogLevel.Information, "Food `{name}` price changed to `{price}`.")]
    public static partial void FoodPriceChanged(this ILogger logger, string name, double price);
}

LogRecord.Timestamp:               2024-01-26T17:55:39.2273475Z
LogRecord.TraceId:                 aed89c3b250fb9d8e16ccab1a4a9bbb5
LogRecord.SpanId:                  bd44308753200c58
LogRecord.TraceFlags:              Recorded
LogRecord.CategoryName:            Program
LogRecord.Severity:                Info
LogRecord.SeverityText:            Information
LogRecord.Body:                    Food `{name}` price changed to `{price}`.
LogRecord.Attributes (Key:Value):
    name: artichoke
    price: 9.99
    OriginalFormat (a.k.a Body): Food `{name}` price changed to `{price}`.
LogRecord.EventId:                 344095174
LogRecord.EventName:               FoodPriceChanged

...

Activity.TraceId:            aed89c3b250fb9d8e16ccab1a4a9bbb5
Activity.SpanId:             bd44308753200c58
Activity.TraceFlags:         Recorded
Activity.ActivitySourceName: MyCompany.MyProduct.MyLibrary
Activity.DisplayName:        SayHello
Activity.Kind:               Internal
Activity.StartTime:          2024-01-26T17:55:39.2223849Z
Activity.Duration:           00:00:00.0361682
...