问题描述

SpringBoot项目使用logback自定义配置后，会在/tmp/ 目录下生成 spring.log的文件(如下图所示)。

解决方案

通过各种资料的搜索，最终发现问题的所在(logback配置如下)。

<?xml version="1.0" encoding="UTF-8"?>

<configuration scan="true">

  <include resource="org/springframework/boot/logging/logback/base.xml"/>    

  <springProperty scope="context" name="springAppName" source="spring.application.name"/>

  <property name="LOG_FILE" value="logs/${springAppName}"/>​    

  <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">

    <layout class="ch.qos.logback.classic.PatternLayout">

      <pattern>

        %black(%d{ISO8601}) %highlight(%-5level) [%blue(%t)] %yellow(%C{1.}): %msg%n%throwable

      </pattern>

    </layout>

  </appender>

  <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">

    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">

      <fileNamePattern>${LOG_FILE}.%d{yyyy-MM-dd}.%i.log</fileNamePattern>

      <maxHistory>90</maxHistory>

      <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">

        <maxFileSize>200MB</maxFileSize>

      </timeBasedFileNamingAndTriggeringPolicy>

    </rollingPolicy>

    <encoder>

      <charset>utf-8</charset>

      <pattern>%d %-5level [%thread] %logger{0}: %msg%n</pattern>

    </encoder>

  </appender>

  <appender name="ASYNC" class="ch.qos.logback.classic.AsyncAppender">

    <queueSize>512</queueSize>

    <appender-ref ref="FILE"/>

  </appender>

  <root level="DEBUG">

    <appender-ref ref="CONSOLE"/>

    <appender-ref ref="ASYNC"/>

  </root>    

  <!-- https://logback.qos.ch/manual/configuration.html#shutdownHook and https://jira.qos.ch/browse/LOGBACK-1090 -->

  <shutdownHook class="ch.qos.logback.core.hook.DelayingShutdownHook"/>    

  <contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator">

    <resetJUL>true</resetJUL>

  </contextListener>    

</configuration>

通过分析上面配置发现base.xml中包含了以下内容:

<?xml version="1.0" encoding="UTF-8"?>

<!--

Base logback configuration provided for compatibility with Spring Boot 1.1

-->

<included>

	<include resource="org/springframework/boot/logging/logback/defaults.xml" />

	<property name="LOG_FILE" value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}/}spring.log}"/>

	<include resource="org/springframework/boot/logging/logback/console-appender.xml" />

	<include resource="org/springframework/boot/logging/logback/file-appender.xml" />

	<root level="INFO">

		<appender-ref ref="CONSOLE" />

		<appender-ref ref="FILE" />

	</root>

</included>

从base.xml中可以看出来，会在/tmp/目录下默认生成一个spring.log，问题已经发现了，那就说明这里的配置需要更改，改成什么呢？

通过在github上查询，只需要将

<include resource="org/springframework/boot/logging/logback/base.xml"/>

替换成

<include resource="org/springframework/boot/logging/logback/defaults.xml" />

即可。

问题解决。