springboot向elk写日志

springboot里连接elk里的logstash，然后写指定index索引的日志，而之后使用kibana去查询和分析日志，使用elasticsearch去保存日志。

添加引用

implementation 'net.logstash.logback:logstash-logback-encoder:5.3'

添加配置

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="false">
    <!--定义日志文件的存储地址 勿在 LogBack 的配置中使用相对路径-->
    <property name="LOG_HOME" value="./logs" />
    <!-- 控制台输出 -->
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符-->
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50} - %msg  %n</pattern>
        </encoder>
    </appender>

    <appender name="logstash" class="net.logstash.logback.appender.LogstashTcpSocketAppender">
        <param name="Encoding" value="UTF-8"/>
        <destination>127.0.0.1:5000</destination>
        <encoder charset="UTF-8" class="net.logstash.logback.encoder.LogstashEncoder" >
            <customFields>{"appname":"elkDemo"}</customFields>
        </encoder>
    </appender>


    <!-- 日志输出级别 -->
    <root level="INFO">
        <appender-ref ref="STDOUT" />
        <appender-ref ref="logstash" />
    </root>

</configuration>

指定配置

server.port=81
logging.config=classpath:logback-spring.xml

logstash配置索引

input {
	tcp {
		port => 5000
		codec => "json"

	}
}

## Add your filters / logstash plugins configuration here

output {
	elasticsearch {
		hosts => "elasticsearch:9200"
		user => "elastic"
		password => "changeme"
        index => "%{[appname]}"
	}
}