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

Question

Is is possible to configure a daily file appender within the application.yml of a Spring Boot application?

i.e. filenamePattern: myfile.%d{yyyy-MM-dd-HH-mm-ss}.log

Answer 1

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>

Answer 2

In the application.properties file add these lines of code, use any these according to your requirement

logging.file.name=myinfo.log
#daily rolling logs
logging.pattern.rolling-file-name=myinfo-%d{yyyy-MM-dd}.%i.log
#per hour rolling logs
logging.pattern.rolling-file-name=myinfo-%d{yyyy-MM-dd-HH}.%i.log
#per minute rolling logs
logging.pattern.rolling-file-name=myinfo-%d{yyyy-MM-dd-HH-mm}.%i.log
#per secs rolling logs
 logging.pattern.rolling-file-name=myinfo-%d{yyyy-MM-dd-HH-mm-ss}.%i.log

Answer 3

From this link :-

logging:
  file: logs/application-debug.log
  pattern:
    console: "%d %-5level %logger : %msg%n"
    file: "%d %-5level [%thread] %logger : %msg%n"
  level:
    org.springframework.web: ERROR
    com.howtodoinjava: INFO
    org.hibernate: ERROR

Answer 4

You can also configure rolling policy based on file size in your logback-spring.xml. In the below, we are specifying max file size as 10MB for SizeBasedTriggeringPolicy:

<?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="ACTUAL_LOG_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.FixedWindowRollingPolicy">
                <!-- gz extension to enable file deletion by logrotator  -->
                <fileNamePattern>${LOG_FILE}.%i.gz</fileNamePattern>
                 <minIndex>1</minIndex>
                <maxIndex>10</maxIndex>
            </rollingPolicy>
            <triggeringPolicy
                class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
                <MaxFileSize>10MB</MaxFileSize>
            </triggeringPolicy>
        </appender>

        <root level="INFO">
            <appender-ref ref="ACTUAL_LOG_FILE" />
        </root>

    </configuration>

Answer 5

logging.file.name=MyApp.log
logging.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

Answer 6

A little late to the party... but I was able to get my log file to roll (by size) with the following configuration in application.yaml and no logback.xml configuration whatsoever:

logging:
    file: /var/log/webapps/app/app.log

    # Roll the log file when it reaches max size
    file.max-size: 1024KB

    # Limit the number of log files retained
    file.max-history: 50

    pattern:
        console: "%d %-5level %logger : %msg%n"
        file: "%d %-5level [%thread] %logger : %msg%n"

    level:
        root:                                           info
        my.package.of.app:                              debug
        org.springframework:                            error
        # etc. etc.