使用log4net将C#日志发送到Elasticsearch

一、安装Elasticsearch

　　参考前面写的文章：https://www.cnblogs.com/songxingzhu/p/7909486.html

　　安装完Elasticsearch后，修改/etc/elasticsearch/elasticsearch.yml文件，并追加下列内容。

network.host: 0.0.0.0

http.port:

　　然后重启Elasticsearch：

systemctl restart elasticsearch

二、新建C#项目，并引入Log4net库和log4net.ElasticSearch库。

　　log4net：https://www.nuget.org/packages/log4net/

　　log4net.ElasticSearch：https://www.nuget.org/packages/log4net.ElasticSearch/

三、在项目中添加log4net.config文件，并设置成“如果较新则复制”，内容如下：

<?xml version="1.0" encoding="UTF-8"?>

<configuration>

  <log4net>

    <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">

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

    </appender>

    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">

      <file value="logs/" />

      <appendToFile value="true" />

      <rollingStyle value="Composite" />

      <staticLogFileName value="false" />

      <datePattern value="yyyyMMdd'.log'" />

      <maxSizeRollBackups value="10" />

      <maximumFileSize value="1MB" />

      <layout type="log4net.Layout.PatternLayout">

        <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />

      </layout>

    </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=139.219.141.155;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="ALL">

      <appender-ref ref="ConsoleAppender" />

      <appender-ref ref="RollingLogFileAppender" />

      <appender-ref ref="ElasticSearchAppender" />

    </root>

  </log4net>

</configuration>

　　注意将黄色区域，更换成您安装好的Elasticsearch服务器的IP地址。

四、Main函数中简单写日志输出

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Log4NetForELK

{

    class Program

    {

        static void Main(string[] args)

        {

            log4net.Config.XmlConfigurator.Configure(new FileInfo("log4net.config"));

            var repository = log4net.LogManager.GetLogger(typeof(Program));

            for (int i = ; i < ; i++)

            {

                repository.InfoFormat("haha this is a test {0}", i);

                repository.Warn("中文测试，柱柱同学。");

                repository.Error("here is error.", new Exception("this is exception."));

            }

        }

    }

}

五、在Elasticsearch2平台端安装head并搜索日志

/usr/share/elasticsearch/bin/plugin install file:/usr/share/elasticsearch/bin/elasticsearch-head-master.zip

六、搜索日志

　　打开浏览器，输入：http://139.219.141.155:9200/_plugin/head/

巴特西

使用log4net将C#日志发送到Elasticsearch

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