How to configure rolling file appender within Spring Boot's application.yml

The default file appender is size based (10MB).

In your logback.xml just configure a TimeBasedRollingPolicy as described here

I.e. something like:

<?xml version="1.0" encoding="UTF-8"?><configuration>  <include resource="org/springframework/boot/logging/logback/base.xml"/>  <appender name="ROLLIN" class="ch.qos.logback.core.rolling.RollingFileAppender">    <file>${LOG_FILE}</file>    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">        <!-- daily rollover -->        <fileNamePattern>${LOG_FILE}.%d{yyyy-MM-dd}.log</fileNamePattern>    </rollingPolicy>  </appender>  <root level="INFO">    <appender-ref ref="ROLLIN" />  </root>  <logger name="org.springframework.web" level="INFO"/></configuration>

To override the default file appender and change it to daily rollover, you could use a logback-spring.xml looking like this:

<?xml version="1.0" encoding="UTF-8"?><configuration>    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>    <property name="LOG_FILE" value="${LOG_FILE:-${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}/}spring.log}"/>    <include resource="org/springframework/boot/logging/logback/console-appender.xml"/>    <appender name="ROLLING-FILE"              class="ch.qos.logback.core.rolling.RollingFileAppender">        <encoder>            <pattern>${FILE_LOG_PATTERN}</pattern>        </encoder>        <file>${LOG_FILE}</file>        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">            <!-- daily rollover -->            <fileNamePattern>${LOG_FILE}.%d{yyyy-MM-dd}.log</fileNamePattern>        </rollingPolicy>    </appender>    <root level="INFO">        <appender-ref ref="CONSOLE"/>        <appender-ref ref="ROLLING-FILE"/>    </root></configuration>

logging.file.name=MyApp.loglogging.pattern.rolling-file-name=MyApp-%d{yyyy-MM-dd-HH-mm-ss}.%i.log

Working with Spring Boot 2.3.4 and 2.2.10
Not working with Spring Boot 2.1.17