Spring Boot Logback 을 이용하여 log level별 파일 만들기

Spring Boot 프로젝트 중 하나의 log파일에 info,warn,error 들이 모두 표시되어 한눈에 보기가 쉽지 않았기에 log level 별로 별도의 파일로 분리하는 방법을 기록합니다.

참고

Logback 전반적인 설명이 너무 잘 된 포스팅을 발견하여 Logback 사용에 대한 내용은 아래 링크를 참고바랍니다.
https://goddaehee.tistory.com/206

logback-spring.xml 파일 생성

<?xml version="1.0" encoding="UTF-8"?>
<!-- 60초마다 설정 파일의 변경을 확인 하여 변경시 갱신 -->
<configuration scan="true" scanPeriod="30 seconds">
    <property name="LOG_PATTERN" value="%-5level %d{yyyy-MM-dd HH:mm:ss}[%thread] [%logger{0}:%line] - %msg%n" />
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>info</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>${LOG_PATTERN}</pattern>
        </encoder>
    </appender> <!-- File Appender -->
    <appender name="TRACE" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>logs/trace/current.log</file>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>trace</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>${LOG_PATTERN}</pattern>
        </encoder>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- .gz,.zip 등을 넣으면 자동 일자별 로그파일 압축 -->
            <fileNamePattern>logs/trace/trace.%d{yyyy-MM-dd}_%i.gz</fileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <!-- 파일당 최고 용량 kb, mb, gb -->
                <maxFileSize>200MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy> <!-- 일자별 로그파일 최대 보관주기(~일), 해당 설정일 이상된 파일은 자동으로 제거-->
            <maxHistory>30</maxHistory> <!--<MinIndex>1</MinIndex> <MaxIndex>10</MaxIndex>-->
        </rollingPolicy>
    </appender>
    <appender name="DEBUG" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>logs/debug/current.log</file>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>debug</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>${LOG_PATTERN}</pattern>
        </encoder>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>logs/debug/debug.%d{yyyy-MM-dd}_%i.gz</fileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>100MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
            <maxHistory>30</maxHistory>
        </rollingPolicy>
    </appender>
    <appender name="INFO" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>logs/info/current.log</file>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>info</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>${LOG_PATTERN}</pattern>
        </encoder>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>logs/info/info.%d{yyyy-MM-dd}_%i.gz</fileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>50MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
            <maxHistory>30</maxHistory>
        </rollingPolicy>
    </appender>
    <appender name="WARN" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>logs/warn/current.log</file>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>warn</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>${LOG_PATTERN}</pattern>
        </encoder>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>logs/warn/warn.%d{yyyy-MM-dd}_%i.gz</fileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>20MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
            <maxHistory>30</maxHistory>
        </rollingPolicy>
    </appender>
    <appender name="ERROR" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>logs/error/current.log</file>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>error</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>${LOG_PATTERN}</pattern>
        </encoder>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>logs/error/error.%d{yyyy-MM-dd}_%i.gz</fileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>20MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
            <maxHistory>30</maxHistory>
        </rollingPolicy>
    </appender>

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

application.yml

spring:
  profiles:
    active: prod

application-prod.yml

logging:
  config: logback-spring.xml

적용 결과