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refactor: logback-spring.xml 리팩토링
- loki 관련 설정 추가 - 로그 패턴의 단일화 적용 - 파일 저장 appender의 설정 변경
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‎src/main/resources/logback-spring.xml‎

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<configuration>
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<springProfile name="default">
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<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
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<encoder>
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<pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n</pattern>
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<charset>UTF-8</charset>
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</encoder>
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</appender>
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<appender name="ASYNC_FILE" class="ch.qos.logback.classic.AsyncAppender">
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<appender-ref ref="FILE" />
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<queueSize>5000</queueSize>
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<discardingThreshold>0</discardingThreshold>
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</appender>
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<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
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<file>${LOG_DIR:-logs}/application.log</file>
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<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
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<fileNamePattern>${LOG_DIR:-logs}/application.%d{yyyy-MM-dd}.log</fileNamePattern>
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<maxHistory>30</maxHistory>
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</rollingPolicy>
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<encoder>
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<pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n</pattern>
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<charset>UTF-8</charset>
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</encoder>
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</appender>
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<logger name="com.somemore" level="DEBUG" additivity="false">
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<appender-ref ref="CONSOLE" />
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<appender-ref ref="ASYNC_FILE" />
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</logger>
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<root level="INFO">
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<appender-ref ref="CONSOLE" />
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<appender-ref ref="ASYNC_FILE" />
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</root>
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</springProfile>
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</configuration>
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<?xml version="1.0" encoding="UTF-8"?>
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<configuration scan="true" scanPeriod="30 seconds">
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<property name="LOG_PATH" value="./logs" />
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<property name="LOG_FILE_NAME" value="application" />
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<!-- 공통 로그 패턴 -->
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<property name="LOG_PATTERN" value="%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n"/>
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<!-- 콘솔 출력 Appender -->
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<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
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<encoder>
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<pattern>${LOG_PATTERN}</pattern>
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</encoder>
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</appender>
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<!-- 파일 출력 Appender -->
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<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
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<file>${LOG_PATH}/${LOG_FILE_NAME}.log</file>
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<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
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<fileNamePattern>${LOG_PATH}/${LOG_FILE_NAME}.%d{yyyy-MM-dd}.log</fileNamePattern>
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<maxHistory>30</maxHistory>
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<totalSizeCap>3GB</totalSizeCap>
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</rollingPolicy>
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<encoder>
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<pattern>${LOG_PATTERN}</pattern>
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</encoder>
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</appender>
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<!-- Loki Appender -->
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<appender name="LOKI" class="com.github.loki4j.logback.Loki4jAppender">
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<http>
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<url>http://localhost:3100/loki/api/v1/push</url>
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<connectionTimeoutMs>30000</connectionTimeoutMs>
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<requestTimeoutMs>15000</requestTimeoutMs>
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<maxRetries>3</maxRetries>
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<backoffMs>1000</backoffMs>
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</http>
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<batchSize>100</batchSize>
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<batchTimeoutMs>10000</batchTimeoutMs>
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<bufferSize>1048576</bufferSize>
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<format>
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<label>
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<pattern>app=my-app,host=${HOSTNAME},environment=${ENV:-local},service=${SERVICE_NAME:-somemore}</pattern>
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</label>
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<message class="com.github.loki4j.logback.JsonLayout">
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<includeTimestamp>true</includeTimestamp>
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<includeMDC>true</includeMDC>
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<includeThreadName>true</includeThreadName>
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<includeLoggerName>true</includeLoggerName>
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<jsonFactory>JACKSON</jsonFactory>
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<timestampFieldName>@timestamp</timestampFieldName>
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<prettyPrint>false</prettyPrint>
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<appendLineSeparator>true</appendLineSeparator>
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<messageTemplate>${LOG_PATTERN}</messageTemplate>
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<timestampFormat>yyyy-MM-dd HH:mm:ss.SSS</timestampFormat>
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</message>
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<timestampPattern>yyyy-MM-dd'T'HH:mm:ss.SSS'Z'</timestampPattern>
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</format>
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<timeZone>Asia/Seoul</timeZone>
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</appender>
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<logger name="com.somemore.application" level="DEBUG" additivity="false">
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<appender-ref ref="CONSOLE" />
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<appender-ref ref="FILE" />
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<appender-ref ref="LOKI" />
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</logger>
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<logger name="org.springframework" level="INFO" />
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<logger name="org.hibernate" level="INFO" />
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<root level="INFO">
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<appender-ref ref="CONSOLE" />
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<appender-ref ref="FILE" />
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<appender-ref ref="LOKI" />
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</root>
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</configuration>

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