So by default test containers logs in the following form:

14:42:17.885|INFO |🐳 [gcr.io/etcd-development/etcd:v3.3] - Creating container for image: gcr.io/etcd-development/etcd:v3.3
14:42:18.256|INFO |🐳 [gcr.io/etcd-development/etcd:v3.3] - Starting container with ID: e2f3eb78d0eb6b073271abcf30a76e675fe35f2212684935a36f3a28d4ee9a14

So if I want to log only warning I have to configure i.e. log4j2 as follow:

<Loggers>
    <!-- package loggers -->
    <Logger name="org.testcontainers" level="INFO" additivity="true"/>
    <Logger name="🐳 [gcr.io/etcd-development/etcd:v3.3]" level="WARN" additivity="true"/>

    <!-- main logger -->
    <Root level="INFO">
      <AppenderRef ref="STDOUT" />
    </Root>
  </Loggers>

Which means that I have to include:

• the bits that generate the docker icon 🐳
• the image name

So if I do upgrade the image or if I need to test against different images, I have to change also the logging configuration if I do not want to see testcontainers logs.

Maybe it is better to put the image name using MDC so one may decide to show it or not.