Kubernetes-Kafka unable to write message on topic
Try following command to send data to topic:
docker exec k8s_kafka_kafka-broker0-69c97b67f-4pmw9_default_a747d38a-0da6-11e9-bd84-fa163e7d3173_1 /opt/kafka_2.12-2.1.0/bin/kafka-console-producer.sh --broker-list kafka-service:30998 --topic test