OMB not reaching the Kafka broker (kubernetes)

[alan-cueva]

I am performing a test for Kafka in a Kubernetes cluster. I set the Kafka cluster-ip in the driver file in the property bootstrap.servers, but I am getting the following error:
11:53:12.881 [kafka-admin-client-thread | adminclient-1] INFO NetworkClient - [AdminClient clientId=adminclient-1] Node 0 disconnected.
11:53:12.882 [kafka-admin-client-thread | adminclient-1] WARN NetworkClient - [AdminClient clientId=adminclient-1] Connection to node 0 (localhost/127.0.0.1:9092) could not be established. Broker may not be available.

I made a local test and it works because the kafka broker was on localhost, so it looks like it is ignoring the boostrap.server property or this is not the correct property to set the IP, I cannot find anything online.

Any idea of what I am doing wrong / I can do?