Start ZooKeeper server:

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

Start Kafka server:

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

Create input topic:

./bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 3 --topic input

Create output topic:

./bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 3 --topic output

Start kafka producer:

./bin/kafka-console-producer.sh --broker-list localhost:9092 --topic input

Start kafka consumer:

./bin/kafka-console-consumer.sh --zookeeper localhost:2181 --topic output