logback.xml

<configuration>
    <variable name="ROOT_LOG_LEVEL" value="${ROOT_LOG_LEVEL:-INFO}" />
    <variable name="KAFKA_LAG_EXPORTER_LOG_LEVEL" value="${KAFKA_LAG_EXPORTER_LOG_LEVEL:-INFO}" />
    <variable name="KAFKA_LAG_EXPORTER_KAFKA_LOG_LEVEL" value="${KAFKA_LAG_EXPORTER_KAFKA_LOG_LEVEL:-INFO}" />
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%date{ISO8601} %-5level %logger{36} %X{akkaSource} - %msg %ex%n</pattern>
        </encoder>
    </appender>
    <logger name="org.apache.kafka" level="${KAFKA_LAG_EXPORTER_KAFKA_LOG_LEVEL}"/>
    <logger name="com.lightbend.kafkalagexporter" level="${KAFKA_LAG_EXPORTER_LOG_LEVEL}"/>
    <root level="${ROOT_LOG_LEVEL}">
        <appender-ref ref="STDOUT" />
    </root>
</configuration>