Serilog – AuctionPro

제3자 로깅 서비스: Serilog, NLog, ELK Stack (Elasticsearch, Logstash, Kibana)와 같은 외부 로깅 라이브러리를 사용하여 로그를 특정 스토리지나 서비스로 보낼 수 있습니다.

1. NuGet 패키지 설치


dotnet add package Serilog.AspNetCore
dotnet add package Serilog.Sinks.File

dotnet add package Serilog.AspNetCore

dotnet add package Serilog.Sinks.File

2. appsettings.json 설정

Serilog를 JSON 설정 파일을 통해 구성할 수도 있습니다. 다음은 appsettings.json을 사용하여 Serilog를 구성하는 예제입니다.

다음은 appsettings.json 파일에서 로깅 설정을 정의하는 예제입니다:


{
  "Serilog": {
    "MinimumLevel": {
      "Default": "Information",
      "Override": {
        "Microsoft": "Warning",
        "System": "Warning"
      }
    },
    "WriteTo": [
      {
        "Name": "Console"
      },
      {
        "Name": "File",
        "Args": {
          "path": "logs/myapp.txt",
          "rollingInterval": "Day"
        }
      }
    ]
  }
}

{

"Serilog": {

"MinimumLevel": {

"Default": "Information",

"Override": {

"Microsoft": "Warning",

"System": "Warning"

}

"WriteTo": [

{

"Name": "Console"

{

"Name": "File",

"Args": {

"path": "logs/myapp.txt",

"rollingInterval": "Day"

}

]

}

3. Program.cs 수정


using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.Hosting;
using Serilog;
using Serilog.Settings.Configuration;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllers();

// Configure Serilog from appsettings.json
builder.Host.UseSerilog((ctx, lc) => lc
    .ReadFrom.Configuration(ctx.Configuration));

var app = builder.Build();

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

app.UseRouting();

app.UseEndpoints(endpoints =>
{
    endpoints.MapControllers();
});

try
{
    Log.Information("Starting up");
    app.Run();
}
catch (Exception ex)
{
    Log.Fatal(ex, "Application start-up failed");
}
finally
{
    Log.CloseAndFlush();
}

using Microsoft.AspNetCore.Builder;

using Microsoft.Extensions.Hosting;

using Serilog;

using Serilog.Settings.Configuration;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddControllers();

// Configure Serilog from appsettings.json

builder.Host.UseSerilog((ctx, lc) => lc

.ReadFrom.Configuration(ctx.Configuration));

var app = builder.Build();

// Configure the HTTP request pipeline.

if (app.Environment.IsDevelopment())

{

app.UseDeveloperExceptionPage();

}

app.UseRouting();

app.UseEndpoints(endpoints =>

{

endpoints.MapControllers();

});

try

{

Log.Information("Starting up");

app.Run();

}

catch (Exception ex)

{

Log.Fatal(ex, "Application start-up failed");

}

finally

{

Log.CloseAndFlush();

}

3. 컨트롤러나 서비스에서 Serilog를 사용


using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;

namespace InMemoryCacheCore.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class BasicCodeController : ControllerBase
    {
        private readonly ILogger<BasicCodeController> _logger;

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

        [HttpGet("test")]
        public IActionResult Test()
        {
            _logger.LogInformation("Test endpoint called");
            _logger.LogInformation("Structured log example: {User} performed {Action} at {Time}", "Alice", "Login", DateTime.UtcNow);

            return Ok("Logging test");
        }
    }
}

using Microsoft.AspNetCore.Mvc;

using Microsoft.Extensions.Logging;

namespace InMemoryCacheCore.Controllers

{

[Route("api/[controller]")]

[ApiController]

public class BasicCodeController : ControllerBase

{

private readonly ILogger<BasicCodeController> _logger;

public BasicCodeController(ILogger<BasicCodeController> logger)

{

_logger = logger;

}

[HttpGet("test")]

public IActionResult Test()

{

_logger.LogInformation("Test endpoint called");

_logger.LogInformation("Structured log example: {User} performed {Action} at {Time}", "Alice", "Login", DateTime.UtcNow);

return Ok("Logging test");

}

결과 Log text


2024-07-08 15:07:19.194 +09:00 [INF] Test endpoint called
2024-07-08 15:07:19.197 +09:00 [INF] Structured log example: Alice performed Login at "2024-07-08T06:07:19.1976664Z"

2024-07-08 15:07:19.194 +09:00 [INF] Test endpoint called

2024-07-08 15:07:19.197 +09:00 [INF] Structured log example: Alice performed Login at "2024-07-08T06:07:19.1976664Z"