ASP.NET Core 中使用 GrayLog 记录日志

使用 UDP 协议发送日志

自定义好的查询 key 存储数据，尽量不要使用 graylog2-server 服务端格式化日志再存储

Ubuntu 安装服务端

sudo apt-get update && sudo apt-get upgrade
sudo apt-get install apt-transport-https openjdk-8-jre-headless uuid-runtime pwgen

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2930ADAE8CAF5059EE73BB4B58712A2291FA4AD5
echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.6 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.6.list
sudo apt-get update
sudo apt-get install -y mongodb-org

sudo systemctl daemon-reload
sudo systemctl enable mongod.service
sudo systemctl restart mongod.service
wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -
echo "deb https://artifacts.elastic.co/packages/5.x/apt stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-5.x.list
sudo apt-get update && sudo apt-get install elasticsearch
sudo systemctl daemon-reload
sudo systemctl enable elasticsearch.service
sudo systemctl restart elasticsearch.service

wget https://packages.graylog2.org/repo/packages/graylog-2.4-repository_latest.deb
sudo dpkg -i graylog-2.4-repository_latest.deb
sudo apt-get update && sudo apt-get install graylog-server

sudo systemctl daemon-reload
sudo systemctl enable graylog-server.service
sudo systemctl start graylog-server.service

docker :http://docs.graylog.org/en/2.4/pages/installation/docker.html

ASP.NET CORE 2 集成

nuget install Gelf.Extensions.Logging

public static IWebHost BuildWebHost(string[] args)
        {
            return WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .ConfigureLogging((context, builder) =>
                {
                    // Read GelfLoggerOptions from appsettings.json.
                    builder.Services.Configure<GelfLoggerOptions>(context.Configuration.GetSection("Graylog"));

                    // Optionally configure GelfLoggerOptions further.
                    builder.Services.PostConfigure<GelfLoggerOptions>(options =>
                        options.AdditionalFields["machine_name"] = Environment.MachineName);

                    // Read Logging settings from appsettings.json and add providers.
                    builder.AddConfiguration(context.Configuration.GetSection("Logging"))
                        .AddConsole()
                        .AddDebug()
                        .AddGelf();
                })
                .Build();
        }

非 .net core 环境也可以使用 NLog 集成

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd"
      autoReload="true"
      throwExceptions="false"
      internalLogLevel="Off" internalLogFile="c:	emp
log-internal.log">

  <extensions>
    <add assembly="EasyGelf.NLog"/>
  </extensions>

  <targets async="true">
    <!-- https://github.com/NLog/NLog/wiki/File-Target
    ${aspnet-session:Variable=SESSION.UserName:EvaluateAsNestedProperties=true}:${aspnet-session:Variable=SESSION.HotelCd:EvaluateAsNestedProperties=true}:${aspnet-session:Variable=SESSION.HotelName:EvaluateAsNestedProperties=true} ${aspnet-request-url:IncludeQueryString=true}
    -->
    <!--
    Write events to a file with the date in the filename. -->
    <target name="f"
            xsi:type="File"
            fileName="${basedir}/logs/${shortdate}/${level}.log"
            layout="${longdate} ${aspnet-MVC-Controller} ${aspnet-MVC-Action} ${threadid:padding=2} ${level:uppercase=true:padding=2} ${logger:shortName=true} ${message} ${exception:format=tostring}"
            archiveFileName="${shortdate}/log.{#}.txt"
            archiveEvery="Day"
            archiveNumbering="Rolling"
            maxArchiveFiles="7"
            concurrentWrites="true"
            createDirs="true"
            autoFlush="true"
            encoding="utf-8"/>
    <!--
    Write events to the graylog. -->
    <target name="GelfUdp"
        xsi:type="GelfUdp"
        facility="ProjectName"
        remoteAddress="192.168.1.1"
        remotePort="12201"
        layout="${message}">
      <parameter name="level" layout="${level}" />
      <parameter name="thread_id" layout="${threadid}" />
      <parameter name="controller" layout="${aspnet-MVC-Controller}" />
      <parameter name="action" layout="${aspnet-MVC-Action}" />
      <parameter name="create_time" layout="${longdate}" />
    </target>
  </targets>
  <rules>
    <!-- add your logging rules here -->
    <!--
    Write all events with minimal level of Debug (So Debug, Info, Warn, Error and Fatal, but not Trace)  to "f"    -->
    <logger name="*" minlevel="Debug" writeTo="f" />
    <!--<logger name="*" minlevel="Info" writeTo="GelfUdp" />-->
  </rules>
</nlog>

REFER:

https://github.com/aspnet/Logging
https://github.com/mattwcole/gelf-extensions-logging
https://github.com/GokGokalp/NLog.Web.AspNetCore.Targets.Gelf
https://blog.takipi.com/how-to-choose-the-right-log-management-tool/
http://www.cnblogs.com/RainingNight/p/asp-net-core-logging-elasticsearch-kibana.html
Elasticsearch 疑难解惑
http://www.cnblogs.com/clonen/p/8116386.html