SpringBoot Set different log level for FILE and CONSOLE appender

I run SpringBoot services on Docker, the Docker daemon will have very high CPU load if it gets huge console log output, so I would like to filter out some log levels for console but keep default settings for file.

Currently I have to write src/main/resources/logback-spring.xml, that's copied from https://github.com/spring-projects/spring-boot/blob/v3.0.0-M4/spring-boot-project/spring-boot/src/main/resources/org/springframework/boot/logging/logback/base.xml:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <!-- https://github.com/spring-projects/spring-boot/blob/v3.0.0-M4/spring-boot-project/spring-boot/src/main/resources/org/springframework/boot/logging/logback/base.xml -->
  <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}" />

  <springProfile name="!(prod | production)">
    <include resource="org/springframework/boot/logging/logback/console-appender.xml" />
  </springProfile>
  <springProfile name="prod | production">
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
      <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
        <level>WARN</level>
      </filter>
      <encoder>
        <pattern>${CONSOLE_LOG_PATTERN}</pattern>
        <charset>${CONSOLE_LOG_CHARSET}</charset>
      </encoder>
    </appender>
  </springProfile>

  <include resource="org/springframework/boot/logging/logback/file-appender.xml" />
  <root level="INFO">
    <appender-ref ref="CONSOLE" />
    <appender-ref ref="FILE" />
  </root>
</configuration>

It's better if we have a new SpringBoot property logging.threshold.APPENDER=LEVEL to control that, so that I don't have to write logback-spring.xml.

Comment From: philwebb

Closing in favor of PR #32076.