aspnetcore 使用serilog日志

而在实际项目开发中，使用第三方日志框架来记录日志也是非常多的，首先一般基础的内置日志记录器在第三方日志框架中都有实现，然后很多第三方日志框架在功能上更强大和丰富，能满足我们更多的项目分析和诊断的需求。常用的有log4net,更复杂的elk，项目中有用到exceptionless。下面说的是serilog：

首先建个aspnetcorewebapi6.0的项目

安装组件：

Seq — centralized structured logs for .NET, Java, Node.js (datalust.co)

using Serilog;
using Serilog.Events;

// Setup serilog in a two-step process. First, we configure basic logging
// to be able to log errors during ASP.NET Core startup. Later, we read
// log settings from appsettings.json. Read more at
// https://github.com/serilog/serilog-aspnetcore#two-stage-initialization.
// General information about serilog can be found at
// https://serilog.net/
Log.Logger = new LoggerConfiguration()
.MinimumLevel.Override("Microsoft", LogEventLevel.Information)
.Enrich.FromLogContext()
.WriteTo.Console()
.CreateBootstrapLogger();

try
{
Log.Information("Starting the web host");
var builder = WebApplication.CreateBuilder(args);
// Full setup of serilog. We read log settings from appsettings.json
builder.Host.UseSerilog((context, services, configuration) => configuration
.ReadFrom.Configuration(context.Configuration)
.ReadFrom.Services(services)
.Enrich.FromLogContext());
// Add services to the container.

builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

// Configure the HTTP request pipeline.
app.UseSerilogRequestLogging(configure =>
{
configure.MessageTemplate = "HTTP {RequestMethod} {RequestPath} ({UserId}) responded {StatusCode} in {Elapsed:0.0000}ms";
});
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

app.Run();
}
catch
(Exception ex)
{
Log.Fatal(ex, "Host terminated unexpexctedly");
}
finally
{
Log.CloseAndFlush();
}

{
//"Logging": {
//  "LogLevel": {
//    "Default": "Information",
//    "Microsoft.AspNetCore": "Warning"
//  }
//},
"Serilog": {
"Using": [ "Serilog.Sinks.Console", "Serilog.Sinks.File", "Serilog.Sinks.Seq" ],
"MinimumLevel": "Information",
// Where do we want to write our logs to? Choose from a large number of sinks:
// https://github.com/serilog/serilog/wiki/Provided-Sinks.
"WriteTo": [
{
"Name": "Console"
},
{
"Name": "File",
"Args": { "path": "Logs/log.txt" }
},
{
"Name": "Seq",
"Args": { "serverUrl": "http://localhost:8888" }
}
],
"Enrich": [ "FromLogContext", "WithMachineName", "WithThreadId" ],
"Properties": {
"Application": "AspNetCoreSerilogDemo"
}
},
"AllowedHosts": "*"
}

运行结果如下，已替换系统自带information：

 

请求跟踪分析：

using Microsoft.AspNetCore.Mvc;

namespace AspNetCoreSerilogDemo.Controllers
{
[ApiController]
[Route("[controller]")]
public class SeriLogDemoController : ControllerBase
{

private readonly ILogger<SeriLogDemoController> _logger;

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

[HttpGet]
public string String()
{
_logger.LogInformation("this is serilog...");
return "Suscess";
}

}
}

 配置文件里面输出路径有"Using": [ "Serilog.Sinks.Console", "Serilog.Sinks.File", "Serilog.Sinks.Seq" ],所以同样会输出到日志文件中,指定路径和文件名：

 

更多更详细功能参考:

Serilog — simple .NET logging with fully-structured events

Seq — centralized structured logs for .NET, Java, Node.js (datalust.co)

示例代码：

exercise/AspNetCoreSerilogDemo at master · liuzhixin405/exercise (github.com)