springboot logback如何从apollo配置中心读取变量

app:
  id: SX-sale-app-soa
apollo:
  bootstrap:
    enabled: true
    #将Apollo配置加载提到初始化日志系统之前
    eagerLoad:
      enabled: true
    namespaces: application.yml,logback-config

<?xml version="1.0" encoding="UTF-8"?>
<!-- 日志级别从低到高分为TRACE < DEBUG < INFO < WARN < ERROR < FATAL，如果设置为WARN，则低于WARN的信息都不会输出 -->
<!-- scan:当此属性设置为true时，配置文件如果发生改变，将会被重新加载，默认值为true -->
<!-- scanPeriod:设置监测配置文件是否有修改的时间间隔，如果没有给出时间单位，默认单位是毫秒。当scan为true时，此属性生效。默认的时间间隔为1分钟。 -->
<!-- debug:当此属性设置为true时，将打印出logback内部日志信息，实时查看logback运行状态。默认值为false。 -->
<configuration  scan="true" scanPeriod="10 seconds">
 
	<!-- 读取apollo配置中心设置的变量 -->
	<springProperty scope="context" name="logstash.host" source="logstash.host"></springProperty>
	<springProperty scope="context" name="logstash.port" source="logstash.port"></springProperty>
	<springProperty scope="context" name="log.path" source="log.path"></springProperty>
	
	<appender name="LOGSTASH" class="net.logstash.logback.appender.LogstashTcpSocketAppender">
        <remoteHost>${logstash.host}</remoteHost>
        <port>${logstash.port}</port>
        <!-- encoder必须配置,有多种可选 -->
        <encoder charset="UTF-8" class="net.logstash.logback.encoder.LogstashEncoder" >
            <!-- "appname":"yang_test" 的作用是指定创建索引的名字时用，并且在生成的文档中会多了这个字段  -->
            <customFields>{"appname":"server-user"}</customFields>
        </encoder>
    </appender>

<property name="rabbitmq_host" source="spring.rabbitmq.host"/>
<property name="rabbitmq_vhost" source="spring.rabbitmq.virtual-host"/>
<property name="rabbitmq_username" source="spring.rabbitmq.username"/>
<property name="rabbitmq_password" source="spring.rabbitmq.password"/>

#RabbitMQ配置
spring:
   rabbitmq:
     host: 127.0.0.1
     virtual-host: test
     username: admin
     password: 123
logging:
  config: classpath:logback-test.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds" debug="false">
    <!-- 日志存放路径 -->
   <property name="log.path" value="./target/logs/system-service" />
    <!-- 参数 -->
    <property name="app_name" source="spring.application.name"/>
    <property name="app_instance_id" source="rabbitmq.instance"/>
    <property name="rabbitmq_host" source="spring.rabbitmq.host"/>
    <property name="rabbitmq_vhost" source="spring.rabbitmq.virtual-host"/>
    <property name="rabbitmq_username" source="spring.rabbitmq.username"/>
    <property name="rabbitmq_password" source="spring.rabbitmq.password"/>
   <!-- 日志输出格式 -->
   <property name="log.pattern"
              value="%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - [%method,%line] - %msg%n" />:ss} %-5level ${springAppName:-} %thread %logger %msg%n"/>
    <!-- 控制台输出 -->
   <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
      <encoder>
         <pattern>${log.pattern}</pattern>
            <charset>UTF-8</charset>
      </encoder>
   </appender>
    <!-- 系统日志输出 -->
   <appender name="FIFE" class="ch.qos.logback.core.rolling.RollingFileAppender">
       <file>${log.path}/${app_name}.log</file>
        <!-- 循环政策：基于时间创建日志文件 -->
      <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- 日志文件名格式 -->
         <fileNamePattern>${log.path}/${app_name}.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
         <!-- 日志最大的历史 60天 -->
         <maxHistory>10</maxHistory>
            <maxFileSize>10MB</maxFileSize>
      </rollingPolicy>
        <append>true</append>
      <encoder>
         <pattern>${log.pattern}</pattern>
            <charset>UTF-8</charset>
      </encoder>
      <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <!-- 过滤的级别 -->
            <level>INFO</level>
            <!-- 匹配时的操作：接收（记录） -->
            <onMatch>ACCEPT</onMatch>
            <!-- 不匹配时的操作：拒绝（不记录） -->
            <onMismatch>DENY</onMismatch>
        </filter>
   </appender>
    <!-- 日志发送到消息队列RabbitMQ，接入ELK -->
    <appender name="RabbitMQ" class="org.springframework.amqp.rabbit.logback.AmqpAppender">
        <!-- 纯文本，不是格式化的JSON -->
        <layout>
            <pattern>
                {
                    "appName":"${app_name}",
                    "appInstance":"${app_instance_id}",
                    "date":"%d{yyyy-MM-dd HH:mm:ss.SSS}",
                    "thread":"[%thread]",
                    "level":"%-5level",
                    "logger":"%logger{36}",
                    "msg":"%msg"
                }
            </pattern>
        </layout>
        <host>${rabbitmq_host}</host>
        <port>5672</port>
        <username>${rabbitmq_username}</username>
        <password>${rabbitmq_password}</password>
        <virtualHost>${rabbitmq_vhost}</virtualHost>
        <declareExchange>false</declareExchange>
        <exchangeType>direct</exchangeType>
        <exchangeName>logs.direct</exchangeName>
        <routingKeyPattern>logback</routingKeyPattern>
        <generateId>true</generateId>
        <durable>false</durable>
        <charset>UTF-8</charset>
        <deliveryModel>NON_PERSISTENT</deliveryModel>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>info</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>
   <!--系统操作日志-->
    <root level="INFO">
        <appender-ref ref="CONSOLE" />
        <appender-ref ref="FILE" />
        <appender-ref ref="RabbitMQ" />
    </root>
</configuration>