示例dev环境日志输出到服务器，方便其他服务联调时问题定位！

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <appender name="LOGSTASH" class="net.logstash.logback.appender.LogstashTcpSocketAppender">
        <!-- logstash日志收集服务地址 -->
        <destination>192.168.105.73:4560</destination>
        <encoder charset="UTF-8" class="net.logstash.logback.encoder.LogstashEncoder">
            <!-- 日志自定义字段，随日志内容一起进行存储，方便在日志查看端kibana中按此字段进行检索 -->
            <customFields>{"projectName":"dev-iot-service"}</customFields>
        </encoder>
    </appender>

    <property name="CONSOLE_PATTERN"
              value="===%date{yyyy-MM-dd HH:mm:ss} PID=%relative %highlight(%-5level) [%thread] %logger Line:%-3L - %msg%n"/>
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <!--encoder 默认配置为PatternLayoutEncoder-->
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>${CONSOLE_PATTERN}</pattern>
            <charset>utf-8</charset>
        </encoder>
        <!--此日志appender是为开发使用，只配置最底级别，控制台输出的日志级别是大于或等于此级别的日志信息-->
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>debug</level>
        </filter>
    </appender>

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