The proposal for KRaft Liveness/Readiness probes involves 3 phases. This task is to implement phase 2.

The pre-requisite is that Strimzi is able to run separate controller and broker servers, rather than only supporting combined mode.

The expected outcome based on the proposal for this task is:

Controller only node:
Liveness: the Java process in the container is running
Readiness: controller is listening on the port 9090 which is configured in controller.listener.names

Broker only node:
Liveness: broker is listening on the port 9091 which is configured in inter.broker.listener.name
Readiness: broker is listening on the port 9091 which is configured in inter.broker.listener.name

Combined node:
Liveness: the Java process in the container is running
Readiness: the Java process in the container is running