`openssl req -new -newkey rsa:4096 -days 365 -x509 -keyout ca-key -out ca-cert -nodes`

cd kafka

https://www.vertica.com/docs/9.2.x/HTML/Content/Authoring/KafkaIntegrationGuide/TLS-SSL/KafkaTLS-SSLExamplePart3ConfigureKafka.htm


after all done

`./bin/zookeeper-server-start.sh config/zookeeper.properties &`

`./bin/kafka-server-start.sh config/server.properties &`

`./bin/kafka-console-producer.sh --broker-list kafka01.mycompany.com:9093 --topic messages --producer.config config/client.properties`

`./bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic messages --consumer.config config/client.properties --from-beginning`


sudo vi /etc/hosts

add `127.0.0.1 kafka01.mycompany.com`