토픽 생성
bin/kafka-topics.sh --create --bootstrap-server localhost:9092 --replication-factor 1 --partitions 3 --topic fastcampus
프로듀서 실행
bin/kafka-console-producer.sh --bootstrap-server localhost:9092 --topic fastcampus
컨슈머 실행
bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic fastcampus