Docker로 카프카 세팅하기

### docker-compose.yml

```yaml
version: '2'
services:
  zookeeper:
    image: wurstmeister/zookeeper
    container_name: zookeeper
    ports:
      - "2181:2181"
  kafka:
    image: wurstmeister/kafka
    container_name: kafka
    ports:
      - "9092:9092"
    environment:
      KAFKA_ADVERTISED_HOST_NAME: 127.0.0.1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
```

```yaml
version: '2'

services:
  zookeeper:
    image: confluentinc/cp-zookeeper:latest
    environment:
      ZOOKEEPER_SERVER_ID: 1
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_TICK_TIME: 2000
      ZOOKEEPER_INIT_LIMIT: 5
      ZOOKEEPER_SYNC_LIMIT: 2
    ports:
      - "22181:2181"

  kafka:
    image: confluentinc/cp-kafka:latest
    depends_on:
      - zookeeper
    ports:
      - "29092:29092"
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: 'zookeeper:2181'
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092,PLAINTEXT_HOST://localhost:29092
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0
```

### 토픽 테스트

```bash
# 토픽 생성하기
$ kafka-topics.sh --create --topic board_topic --bootstrap-server localhost:9092 --replication-factor 1 --partitions 1
# 생성된 토픽확인
$ kafka-topics.sh --describe --topic board_topic --bootstrap-server kafka:9092

$ cd /opt/kafka_2.13-2.8.1/bin/

# 컨슈머 실행하기
$ ./kafka-console-consumer.sh --topic board_topic --bootstrap-server kafka:9092

# 프로듀서 실행하기
$ ./kafka-console-producer.sh --topic board_topic --broker-list kafka:9092
# 컨슈머 결과 보기
```