用 Docker 快速搭建 Kafka 集群

版本

•JDK 14•Zookeeper•Kafka

安装 Zookeeper 和 Kafka

Kafka 依赖 Zookeeper，所以我们需要在安装 Kafka 之前先拥有 Zookeeper。准备如下的 docker-compose.yaml 文件，将文件中的主机地址 192.168.1.100 替换成你自己的环境中的主机地址即可。

version: "3"services: zookeeper: image: zookeeper build: context: ./ container_name: zookeeper ports: - 2181:2181 volumes: - ./data/zookeeper/data:/data - ./data/zookeeper/datalog:/datalog - ./data/zookeeper/logs:/logs restart: always kafka_node_0: depends_on: - zookeeper build: context: ./ container_name: kafka-node-0 image: wurstmeister/kafka environment: KAFKA_BROKER_ID: 0 KAFKA_ZOOKEEPER_CONNECT: 192.168.1.100:2181 KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://192.168.1.100:9092 KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9092 KAFKA_NUM_PARTITIONS: 3 KAFKA_DEFAULT_REPLICATION_FACTOR: 2 ports: - 9092:9092 volumes: - ./data/kafka/node_0:/kafka restart: unless-stopped kafka_node_1: depends_on: - kafka_node_0 build: context: ./ container_name: kafka-node-1 image: wurstmeister/kafka environment: KAFKA_BROKER_ID: 1 KAFKA_ZOOKEEPER_CONNECT: 192.168.1.100:2181 KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://192.168.1.100:9093 KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9093 KAFKA_NUM_PARTITIONS: 3 KAFKA_DEFAULT_REPLICATION_FACTOR: 2 ports: - 9093:9093 volumes: - ./data/kafka/node_1:/kafka restart: unless-stopped kafka_node_2: depends_on: - kafka_node_1 build: context: ./ container_name: kafka-node-2 image: wurstmeister/kafka environment: KAFKA_BROKER_ID: 2 KAFKA_ZOOKEEPER_CONNECT: 192.168.1.100:2181 KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://192.168.1.100:9094 KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9094 KAFKA_NUM_PARTITIONS: 3 KAFKA_DEFAULT_REPLICATION_FACTOR: 2 ports: - 9094:9094 volumes: - ./data/kafka/node_2:/kafka restart: unless-stopped

输入 docker-compose up -d 运行脚本文件进行集群构建。等待一会儿，得到如下结果即为成功。

SpringBoot 集成 Kafka 集群

创建一个全新的 SpringBoot 工程，在 build.gradle 文件中添加下列依赖。

dependencies { ... ... implementation 'org.springframework.kafka:spring-kafka:2.5.2.RELEASE' implementation 'com.alibaba:fastjson:1.2.71'}

1.在 application.properties 进行 Kafka 相关参数配置。

spring.kafka.bootstrap-servers=192.168.1.100:9092,192.168.1.100:9093,192.168.1.100:9094spring.kafka.producer.retries=0spring.kafka.producer.batch-size=16384spring.kafka.producer.buffer-memory=33554432spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.StringSerializerspring.kafka.producer.value-serializer=org.apache.kafka.common.serialization.StringSerializerspring.kafka.consumer.auto-offset-reset=latestspring.kafka.consumer.enable-auto-commit=truespring.kafka.consumer.auto-commit-interval=100

2.创建消息体类。

public class Message { private Long id; private String message; private Date sendAt;}

3.创建消息发送者

public class Sender { @Autowired private KafkaTemplate<String, String> kafkaTemplate; public void send() { Message message = new Message(); message.setId(System.currentTimeMillis()); message.setMessage(UUID.randomUUID().toString()); message.setSendAt(new Date()); log.info("message = {}", JSON.toJSONString(message)); kafkaTemplate.send("test", JSON.toJSONString(message)); }}

4.创建消息接收者

public class Receiver { @KafkaListener(topics = {"test"}, groupId = "test") public void listen(ConsumerRecord<?, ?> record) { Optional<?> message = Optional.ofNullable(record.value()); if (message.isPresent()) { log.info("receiver record = " + record); log.info("receiver message = " + message.get()); } }}

5.测试消息队列

public class QueueController { @Autowired private Sender sender; @PostMapping("/test") public void testQueue() { sender.send(); sender.send(); sender.send(); }}

得到如下日志即为集成成功。

到这里就我们就成功搭建了一个 Kafka 伪集群，并成功与 SpringBoot 进行整合。

作者：曾是然链接：https://segmentfault.com/a/1190000022988499

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