conf/logback.xml

<configuration>

  <conversionRule conversionWord="coloredLevel" converterClass="play.api.libs.logback.ColoredLevel" />

  <appender name="LOGFILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>logs/application.log</file>

    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
      <fileNamePattern>logs/application.log.%d{yyyy-MM-dd}.gz</fileNamePattern>
      <maxHistory>2</maxHistory>
    </rollingPolicy>

    <encoder>
      <pattern>%date - [%level] - from %logger in %thread %n%message%n%xException%n</pattern>
    </encoder>
  </appender>

  <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
    <encoder class="net.logstash.logback.encoder.LogstashEncoder" />
  </appender>
  <appender name="ASYNCSTDOUT" class="ch.qos.logback.classic.AsyncAppender">
    <appender-ref ref="STDOUT" />
  </appender>
  <logger name="play" level="INFO" />
  <logger name="application" level="DEBUG" />
  <logger name="com.gu.viewer.logging" level="DEBUG" />

  <root level="INFO">
    <appender-ref ref="LOGFILE"/>
    <appender-ref ref="ASYNCSTDOUT"/>
  </root>
</configuration>