I followed the kafka documentation https://kafka.apache.org/documentation/#security_sasl_config and I could run the kafka in SASL_PLAINTEXT mode, then I wanted to use the kafka in SASL_SSL mode, so I followed the documentation https://kafka.apache.org/documentation/#security_ssl to config the SSL, there are probably some problems in the documentation, but I finally resolved them and generated the certificates and store them in the store. The steps are something like below: