emqx_plugin_kafka/priv/example/example_2.hocon

plugin_kafka {
  connection {
    bootstrap_hosts = ["10.3.64.223:9192"]
    sasl {
      mechanism = plain
      username = "username"
      password = "password"
    }
  }

  producer {
    encode_payload_type = base64
  }

  hooks = [
    {endpoint = client.connect}
    , {
      endpoint = message.publish
      filter = "test/#"
      kafka_topic = emqx_msg_publish
      kafka_message = {
        timestamp = "${.timestamp}"
        value = "{topic:${.topic},payload:${.payload},qos:${.qos}}"
        key = "${.clientid}"
      }
    }
  ]
}