使用appsettings.json配置和依赖注入调用Serilog日志模块

appsettings.json配置Serilog

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

  "Serilog": {
    "Using": [ "Serilog.Sinks.Console", "Serilog.Sinks.File" ],
    "MinimumLevel": {
      "Default": "Information",
      "Override": {
        "Microsoft": "Information",
        "Microsoft.AspNetCore": "Warning",
        "System": "Warning"
      }
    },
    "WriteTo": [
      //{ "Name": "Console" },
      //{
      //  "Name": "File",
      //  "Args": {
      //    "path": "./Logs/log-.txt",
      //    "rollingInterval": "Day",
      //    "formatter": "Serilog.Formatting.Compact.CompactJsonFormatter, Serilog.Formatting.Compact"
      //  }
      //},
      {
        "Name": "MSSqlServer",
        "Args": {
          "connectionString": "Server=DESKTOP-DABHN6U\\MSSQLSERVER2014;uid=sa;pwd=Lz38275292;database=NewAps;MultipleActiveResultSets=true;",
          "tableName": "Log",
          "autoCreateSqlTable": true //自动创建日志表Log
        }
      }
    ],
    "Enrich": [ "FromLogContext", "WithMachineName", "WithThreadId" ],

    "Properties": {
      "Application": "WepAPI"
    }
  },

  "AllowedHosts": "*",
｝

使用 Serilog 日志服务，在 Program.cs 文件中添加以下代码

//为了使用appsettings.json配置和依赖注入，分两步初始化Serilog日志
//1.Serilog 日志,1.配置初始“引导”记录器
Log.Logger = new LoggerConfiguration()
    .MinimumLevel.Override("Microsoft", LogEventLevel.Information)
    .Enrich.FromLogContext()
    .WriteTo.Console()
    .CreateBootstrapLogger();
//2.Serilog 日志 创建最终记录器
builder.Host.UseSerilog((context, services, configuration) =>
configuration.ReadFrom.Configuration(context.Configuration)
.ReadFrom.Services(services)
.Enrich.FromLogContext()
.WriteTo.Console());

Web项目引用以下程序包

Install-Package Serilog.AspNetCore
Install-Package Serilog.Sinks.MSSqlServer
Install-Package Serilog.Settings.Configuration

注意：当没有引用  Serilog.Sinks.MSSqlServer 包时，日志不会写入数据库

消费 Serilog 日志

//日志测试控制器
    [Route("api/[controller]")]
    [ApiController]
    public class LoggerTestController : ControllerBase
    {
        private readonly ILogger<LoggerTestController> _logger;
        public LoggerTestController(ILogger<LoggerTestController> logger)
        {
            _logger = logger;
        }

        [HttpGet]
        public async Task WriterLogger()
        {
            int eventId = 3721;
            _logger.LogInformation(eventId, "升级到最新版本({version})", "1.0.0.rc2");
            _logger.LogWarning(eventId, "并发量接近上限({maximum}) ", 200);
            _logger.LogError(eventId, "数据库连接失败(数据库：{Database}，用户名：{User})", "TestDb", "sa");
        }
    }

在日志中添加增强属性

public static class RequestEnricher
{
  public static void LogAdditionalInfo(IDiagnosticContext diagnosticContext,HttpContext httpContext)
  {
    diagnosticContext.Set("ClientIP",httpContext.Connection.RemoteIpAddress?.ToString());
    diagnosticContext.Set("UserName", httpContext.User?.Identity?.Name == null ? "(anonymous)" : httpContext.User.Identity.Name);

  }
}

使用日志增强中间件

var app = builder.Build();

//Serilog 日志增强
app.UseSerilogRequestLogging(options => options.EnrichDiagnosticContext = RequestEnricher.LogAdditionalInfo);

注意：app.UseSerilogRequestLogging() 中间件的顺序

 提示：常用第三方日志提供程序：NLog、Serilog、Log4Net

手动创建日志表Sql(可选)：

/****** Object:  Table [dbo].[Log]    Script Date: 2022-09-26 18:24:33 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[Log](
	[Id] [int] IDENTITY(1,1) NOT NULL,
	[Message] [nvarchar](max) NULL,
	[MessageTemplate] [nvarchar](max) NULL,
	[Level] [nvarchar](max) NULL,
	[TimeStamp] [datetime] NULL,
	[Exception] [nvarchar](max) NULL,
	[Properties] [nvarchar](max) NULL,
 CONSTRAINT [PK_Log] PRIMARY KEY CLUSTERED 
(
	[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO

进一步学习：https://andrewlock.net/using-serilog-aspnetcore-in-asp-net-core-3-reducing-log-verbosity/

使用 Serilog 进行日志记录的最佳实践 - 代码迷宫 (code-maze.com)