logback.xml

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

    <jmxConfigurator />
    <conversionRule conversionWord="clr" converterClass="org.springframework.boot.logging.logback.ColorConverter" />
    <conversionRule conversionWord="wex" converterClass="org.springframework.boot.logging.logback.WhitespaceThrowableProxyConverter" />

    <variable name="appName" value="logger-service"/>
    <variable name="LOG_DIR" value="{{ jar_log_path | default('/var/log/' + tomcat ) | default('/var/log/tomcat9')}}" />

    <appender name="TOMCAT_LOG" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${LOG_DIR}/${appName}.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
            <fileNamePattern>${LOG_DIR}/${appName}.%i.log.gz</fileNamePattern>
            <minIndex>1</minIndex>
            <maxIndex>4</maxIndex>
        </rollingPolicy>
        <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
            <maxFileSize>10MB</maxFileSize>
        </triggeringPolicy>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %5p --- [%15.15t] %-40.40logger{39} : %m%n%wex</pattern>
        </encoder>
    </appender>

    <root level="WARN">
        <appender-ref ref="TOMCAT_LOG" />
    </root>
</configuration>