title: Set Logging Level in Spring Boot via Environment Variable
body: <p>Should it be possible to set logging levels through environment variables alone in a Spring Boot application?</p>
  
  <p>I don't want to use <code>application.properties</code> as I'm running on Cloud Foundry and want to pick up changes without a deploy (but after the app has restarted, or restaged to be more precise).</p>
  
  <p>I've tried setting env vars like <code>LOGGING_LEVEL_ORG_SPRINGFRAMEWORK=TRACE</code> but that has no effect. Putting <code>logging.level.org.springframework: TRACE</code> in <code>application.properties</code> does work though.</p>