结构化日志工具 Serilog 使用

1. 添加 NuGet 包

　　在解决方案管理器视图中的目标项目上右键  -> 管理 NuGet 程序包；

　　添加 Serilog、Serilog.Sinks.Console、Serilog.Sinks.File、Serilog.Sinks.Seq、Serilog.AspNetCore、Microsoft.Extensions.Configuration.Json 包，如下图所示：

2. 安装日志监控组件 Seq

　下载地址：https://datalust.co/download

　　

　安装完成后，打开：http://172.22.113.77:5341 验证是否成功安装（IP 为 Seq 安装电脑的 IP）。

　注：该程序安装完成后以服务的形式运行，如下图所示：

　　

3. 通过代码使用

using Microsoft.Extensions.Configuration;
using Serilog;
using Serilog.Core;
using Serilog.Events;
using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Threading;

namespace SerilogDemo
{
    class Program
    {
        static string logConfigFilePath = "Config//logsettings.json";

        static void Main(string[] args)
        {
            var configuration = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile(path: logConfigFilePath, optional: false, reloadOnChange: true)
                .Build();

            Log.Logger = new LoggerConfiguration()
                .Enrich.With(new ThreadIdEnricher())
                .Enrich.With(new IpAddressEnricher())
                .ReadFrom.Configuration(configuration)
                .CreateLogger();

            Log.Information("Serilog test start. {Name}", Environment.UserName);

            Thread thread = new Thread(Thread_Test);
            thread.Start();

            int a = 10, b = 0;
            try
            {
                Log.Debug("Dividing {A} by {B}", a, b);
                Console.WriteLine(a / b);
            }
            catch (Exception ex)
            {
                Log.Error(ex, "Something went wrong");
            }
            finally
            {
                Log.CloseAndFlush();
            }

            Console.ReadLine();
        }

        private static void Thread_Test()
        {
            Log.Debug("Thread_Test() In.");
            Console.WriteLine("ThreadId = {0}", Thread.CurrentThread.ManagedThreadId);
            Log.Debug("Thread_Test() Out.");
        }
    }

    class ThreadIdEnricher : ILogEventEnricher
    {
        public void Enrich(LogEvent logEvent, ILogEventPropertyFactory propertyFactory)
        {
            logEvent.AddPropertyIfAbsent(propertyFactory.CreateProperty(
                    "ThreadId", Thread.CurrentThread.ManagedThreadId));
        }
    }

    class IpAddressEnricher : ILogEventEnricher
    {
        string localIp = "";

        public IpAddressEnricher()
        {
            localIp = GetLocalIp();
        }

        public void Enrich(LogEvent logEvent, ILogEventPropertyFactory propertyFactory)
        {
            logEvent.AddPropertyIfAbsent(propertyFactory.CreateProperty(
                    "IpAddress", localIp));
        }

        private string GetLocalIp()
        {
            string hostname = Dns.GetHostName();
            IPHostEntry localhost = Dns.GetHostEntry(hostname);
            if (localhost != null)
            {
                foreach (IPAddress item in localhost.AddressList)
                {
                    //判断是否是内网IPv4地址
                    if (item.AddressFamily == AddressFamily.InterNetwork)
                    {
                        return item.MapToIPv4().ToString();
                    }
                }
            }
            return "127.0.0.1";
        }
    }
}

{
  "Serilog": {
    "Using": [ "Serilog.Sinks.Console", "Serilog.Sinks.File" ],
    "MinimumLevel": "Debug",
    "WriteTo": [
      {
        "Name": "Console",
        "Args": {
          "theme": "Serilog.Sinks.SystemConsole.Themes.SystemConsoleTheme::Colored, Serilog.Sinks.Console",
          "outputTemplate": "{Level:u3}: {Message}{NewLine}{Exception}"
        }
      },
      {
        "Name": "File",
        "Args": {
          "path": "Logs/AEConsoleGatewayService_.log",
          "rollingInterval": "Day",
          "outputTemplate": "Thread ID: {ThreadId} 
Time: {Timestamp:yyyy-MM-dd HH:mm:ss.fff} 
Level: {Level:u3} 
Message: {Message:lj} 
{Exception} 
"
        }
      },
      {
        "Name": "Seq",
        "Args": {
          "serverUrl": "http://172.22.113.77:5341"
        }
      }
    ]
  }
}

参考： Serilog 入门官方文档

参考2：Seq 官方文档 1   Seq官方文档 2

参考3：Seq 日志删除