Springboot ELK stack logging config for log4js (logstash)

log4js2-spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout
                    pattern="%style{%d{ISO8601}}{black} %highlight{%-5level }[%style{%t}{bright,blue}] %style{%C{1.}}{bright,yellow}: %msg%n%throwable" />
        </Console>

        <RollingFile name="RollingFile"
                     fileName="./logs/spring-boot-logger-log4j2.log"
                     filePattern="./logs/$${date:yyyy-MM}/spring-boot-logger-log4j2-%d{-dd-MMMM-yyyy}-%i.log.gz">
            <PatternLayout>
                <pattern>%d %p %C{1.} [%t] %m%n</pattern>
            </PatternLayout>
            <Policies>
                <!-- rollover on startup, daily and when the file reaches
                    10 MegaBytes -->
                <OnStartupTriggeringPolicy />
                <SizeBasedTriggeringPolicy
                        size="10 MB" />
                <TimeBasedTriggeringPolicy />
            </Policies>
        </RollingFile>

        <Gelf name="gelf"
              host="tcp:localhost"
              port="5000"
              version="1.0"
              extractStackTrace="true"
              filterStackTrace="true"
              mdcProfiling="true"
              includeFullMdc="true"
              maximumMessageSize="8192"
              originHost="%host"
              ignoreExceptions="true">
            <Field name="timestamp"
                   pattern="%d{dd MMM yyyy HH:mm:ss,SSS}" />
            <Field name="level"
                   pattern="%level" />
            <Field name="simpleClassName"
                   pattern="%C{1}" />
            <Field name="className"
                   pattern="%C" />
            <Field name="server.simple"
                   pattern="%host{simple}" />
            <Field name="server.fqdn"
                   pattern="%host{fqdn}" />
            <Field name="application"
                   literal="${applicationName}" />
        </Gelf>
    </Appenders>

    <Loggers>
        <!-- LOG everything at INFO level -->
        <Root level="info">
            <AppenderRef ref="gelf" />
            <AppenderRef ref="Console" />
            <AppenderRef ref="RollingFile" />
        </Root>

        <!-- LOG "com.baeldung*" at TRACE level -->
        <Logger name="com.example.demo" level="trace"></Logger>
    </Loggers>

</Configuration>