logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
  ~ Copyright The OpenTelemetry Authors
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~     http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  -->

<configuration>
  <appender name="LIST" class="ch.qos.logback.core.read.ListAppender"/>

  <appender name="OTEL"
    class="io.opentelemetry.instrumentation.logback.mdc.v1_0.OpenTelemetryAppender">
    <addBaggage>true</addBaggage>
    <appender-ref ref="LIST"/>
  </appender>

  <logger name="test">
    <level value="info"/>
    <appender-ref ref="OTEL"/>
  </logger>
</configuration>