概述
Elasticsearch可广泛应用于日志分析、全文检索、结构化数据分析等多种场景，大幅度降低维护多套专用系统的成本，在开源社区非常受欢迎。在系统中，如果将日志作为文件输出，查看系统日志将非常不便；如果将日志保存到数据库中，又不能进行全文搜索。在这里我们将日志输出到ElasticSearch中，借助Kibana再查找日志。
实现方式
1、配置es服务地址
{ "ConnectionStrings": { "ElasticSearchServerAddress": "http://localhost:9200" }, "Logging": { "LogLevel": { "Default": "Warning" } }, "AllowedHosts": "*"}
2、配置nlog.config
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" internalLogToConsole="true"> <extensions> <add assembly="NLog.Targets.ElasticSearch"/> extensions>
<targets> <target name="ElasticSearch" xsi:type="ElasticSearch" ConnectionStringName="ElasticSearchServerAddress" index="userapi-${date:format=yyyy.MM.dd}" documentType="doc" includeAllProperties="true" layout="[${date:format=yyyy-MM-dd HH\:mm\:ss}][${level}] ${logger} ${message} ${exception:format=toString}"> <field name="MachineName" layout="${machinename}" /> <field name="Time" layout="${longdate}" /> <field name="level" layout="${level:uppercase=true}" /> <field name="logger" layout=" ${logger}" /> <field name="message" layout=" ${message}" /> <field name="exception" layout=" ${exception:format=toString}" /> <field name="processid" layout=" ${processid}" /> <field name="threadname" layout=" ${threadname}" /> <field name="stacktrace" layout=" ${stacktrace}" /> <field name="Properties" layout
="${machinename} ${longdate} ${level:uppercase=true} ${logger} ${message} ${exception}|${processid}|${stacktrace}|${threadname}" /> target> targets> <rules> <logger name="*" minlevel="INFO" writeTo="ElasticSearch" /> rules>nlog>
3、测试写入日志
[HttpGet] public ActionResultstring>> Get() { var result = new string[] { "value1", "value2" }; _logger.LogInformation(JsonConvert.SerializeObject(result)); return result; }
效果
