logback-spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
    <springProperty scope="context" name="appName" source="app.name" defaultValue="Unknown"/>
    <springProperty scope="context" name="logstashHost" source="logstash.host"/>
    <springProperty scope="context" name="logstashPort" source="logstash.port"/>

    <appender name="LOGSTASH"
              class="net.logstash.logback.appender.LogstashTcpSocketAppender">
        <param name="Encoding" value="UTF-8"/>
        <remoteHost>${logstashHost}</remoteHost>
        <port>${logstashPort}</port>
        <reconnectionDelay>5 second</reconnectionDelay>
        <encoder class="net.logstash.logback.encoder.LogstashEncoder">
            <customFields>
                {
                "appName": "${appName}"
                }
            </customFields>
        </encoder>
    </appender>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%clr(%d{yyyy-MM-dd HH:mm:ss}){blue} %clr(%5p) %clr(18971){magenta} %clr(---){faint}
                %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n%wEx
            </pattern>
        </encoder>
    </appender>

    <root level="INFO">
        <appender-ref ref="STDOUT"/>
        <appender-ref ref="LOGSTASH"/>
    </root>

</configuration>