How does the use of EmbeddedKafkaBroker differ when inside or outside of the OpenShift server?

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The use of EmbeddedKafkaBroker should not differ significantly whether it is inside or outside of the OpenShift server. It is a testing utility provided by Spring Kafka that allows developers to create an in-memory Kafka instance for testing purposes.

However, there may be some differences in how it is configured depending on your environment. For example, if you are using OpenShift, you may need to configure your Kafka broker to use OpenShift networking rules and service discovery. You may also need to ensure that the broker is using the correct ports and endpoints for your OpenShift deployment.

In general, the use of EmbeddedKafkaBroker should be similar regardless of your deployment environment, but there may be some specific configuration requirements for each environment.