webapi 集成 log4net 写入 ElasticSearch

log4net.config

<log4net>
  <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
    <!--定义文件存放位置-->
    <file value="log/" />
    <appendToFile value="true" />
    <rollingStyle value="Date" />
    <datePattern value="yyyyMMdd'.txt'" />
    <staticLogFileName value="false" />
    <param name="MaxSizeRollBackups" value="100" />
    <layout type="log4net.Layout.PatternLayout">
      <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
    </layout>
  </appender>

  <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
    <layout type="log4net.Layout.PatternLayout" value="%date [%thread] %-5level %logger - %message%newline" />
  </appender>

  <appender name="ElasticSearchAppender" type="log4net.ElasticSearch.ElasticSearchAppender, log4net.ElasticSearch">
    <layout type="log4net.Layout.PatternLayout,log4net">
      <param name="ConversionPattern" value="%d{ABSOLUTE} %-5p %c{1}:%L - %m%n" />
    </layout>
    <connectionString value="Server=localhost;Index=log_test;Port=9200;rolling=false"/>
    <lossy value="false" />
    <evaluator type="log4net.Core.LevelEvaluator">
      <threshold value="ALL" />
    </evaluator>
    <bufferSize value="1" />
  </appender>
  <root>
    <level value="INFO" />
    <appender-ref ref="ElasticSearchAppender" />
    <appender-ref ref="ConsoleAppender" />
    <!--文件形式记录日志-->
    <appender-ref ref="RollingLogFileAppender" />
  </root>
</log4net>

using Microsoft.AspNetCore.Mvc;

namespace log4net直切ElasticSearch.Controllers;

[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{
    private static readonly string[] Summaries = new[]
    {
        "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
    };

    private readonly ILogger<WeatherForecastController> _logger;

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

    [HttpGet(Name = "GetWeatherForecast")]
    public IEnumerable<WeatherForecast> Get()
    {
        _logger.LogInformation("log4net写Elastic日志");
        return Enumerable.Range(1, 5).Select(index => new WeatherForecast
        {
            Date = DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
            TemperatureC = Random.Shared.Next(-20, 55),
            Summary = Summaries[Random.Shared.Next(Summaries.Length)]
        })
        .ToArray();
    }
}