ログレベルで出力ファイルをわける

logback-spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
    <!-- 標準出力はデフォルト -->
    <include resource="org/springframework/boot/logging/logback/console-appender.xml" />

    <property name="APPLICATION_LOG_FILE" value="${LOG_PATH}/application.log" />
    <appender name="FILE_INFO" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <encoder>
            <pattern>${FILE_LOG_PATTERN}</pattern>
            <charset>${FILE_LOG_CHARSET}</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <file>${APPLICATION_LOG_FILE}</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <fileNamePattern>${APPLICATION_LOG_FILE}.%d{yyyy-MM-dd}.%i.gz</fileNamePattern>
            <maxFileSize>10MB</maxFileSize>
        </rollingPolicy>
    </appender>

    <property name="ERROR_LOG_FILE" value="${LOG_PATH}/error.log" />
    <appender name="FILE_ERROR" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <encoder>
            <pattern>${FILE_LOG_PATTERN}</pattern>
            <charset>${FILE_LOG_CHARSET}</charset>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <file>${ERROR_LOG_FILE}</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <fileNamePattern>${ERROR_LOG_FILE}.%d{yyyy-MM-dd}.%i.gz</fileNamePattern>
            <maxFileSize>10MB</maxFileSize>
        </rollingPolicy>
    </appender>

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