A Custom Simple logback file to use in Spring boot to generate logs to custom locations. Just drop this into the classpath, preferably the resources folder. When running, make sure to include these variables from the environment: ```-DAPPLICATION_NAME=... -DAPP_LOG_DIR=... -DAPP_LOG_FILE_NAME=...```

logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
    <property name="APPLICATION_NAME" value="${APPLICATION_NAME}"/>
    <property name="APP_LOG_DIR" value="${APP_LOG_DIR}" />
    <property name="APP_LOG_FILE_NAME" value="${APP_LOG_FILE_NAME}" />
    <property name="MAX_FILE_SIZE" value="10MB"/>
    <property name="MAX_DAYS_TO_KEEP" value="30" />
    <property name="APP_LOG_FILE"
              value="${APP_LOG_DIR}/${APP_LOG_FILE_NAME}.log}"/>


    <appender name="consoleAppender" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{0}.%M\(%line\) - %msg%n</Pattern>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>DEBUG</level>
        </filter>
    </appender>

    <appender name="fileAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${APP_LOG_FILE}</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!-- daily rollover. Make sure the path matches the one in the file element or else
             the rollover logs are placed in the working directory. -->
            <!--<fileNamePattern>${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}}/${APPLICATION_NAME}}%d{yyyy-MM-dd}.%i.log</fileNamePattern>-->
            <FileNamePattern>${APP_LOG_DIR}/${APP_LOG_FILE_NAME}.%d{yyyy-MM-dd}.%i.log</FileNamePattern>

            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>${MAX_FILE_SIZE}</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
            <!-- keep 30 days' worth of history -->
            <maxHistory>${MAX_DAYS_TO_KEEP}</maxHistory>
        </rollingPolicy>

        <encoder>
            <charset>UTF-8</charset>
            <Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{0}.%M\(%line\) - %msg%n</Pattern>
        </encoder>
    </appender>

    <logger name="org.springframework.boot" level="INFO"/>
    <logger name="com.richard.test.spring" level="INFO" additivity="false">
        <!-- <appender-ref ref="CONSOLE"/>-->
        <appender-ref ref="consoleAppender"/>
        <appender-ref ref="fileAppender"/>
    </logger>
</configuration>