docker-compose 搭建 kafka 集群

Posted 2021-06-23 仅此而已-远方

环境准备

kafka依赖zookeeper，所以搭建kafka需要先配置zookeeper。网格信息如下：

zookeeper	192.168.56.101:2181
kafka1	192.168.56.101:9092
kafka2	192.168.56.101:9093
kafka3	192.168.56.101:9094

 

 

 

 

 

 

开始搭建

1、安装 docker-compose

curl -L http://mirror.azure.cn/docker-toolbox/linux/compose/1.25.4/docker-compose-Linux-x86_64 -o /usr/local/bin/docker-compose

chmod +x /usr/local/bin/docker-compose

2、创建 docker-compose.yaml 文件

version: \'3.3\'
services:
  zookeeper:
    image: wurstmeister/zookeeper
    container_name: zookeeper
    ports:
      - 2181:2181
    volumes:
      - ./data/zookeeper/data:/data
      - ./data/zookeeper/datalog:/datalog
      - ./data/zookeeper/logs:/logs
    restart: always
  kafka1:
    image: wurstmeister/kafka
    depends_on:
      - zookeeper
    container_name: kafka1
    ports:
      - 9092:9092
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: 192.168.56.101:2181
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://192.168.56.101:9092
      KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9092
    volumes:
      - /data/kafka1/data:/data
      - /data/kafka1/log:/datalog
    restart: unless-stopped  
  kafka2:
    image: wurstmeister/kafka
    depends_on:
      - zookeeper
    container_name: kafka2
    ports:
      - 9093:9093
    environment:
      KAFKA_BROKER_ID: 2
      KAFKA_ZOOKEEPER_CONNECT: 192.168.56.101:2181
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://192.168.56.101:9093
      KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9093
    volumes:
      - /data/kafka2/data:/data
      - /data/kafka2/log:/datalog
    restart: unless-stopped
  kafka3:
    image: wurstmeister/kafka
    depends_on:
      - zookeeper
    container_name: kafka3
    ports:
      - 9094:9094
    environment:
      KAFKA_BROKER_ID: 3
      KAFKA_ZOOKEEPER_CONNECT: 192.168.56.101:2181
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://192.168.56.101:9094
      KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9094
    volumes:
      - /data/kafka3/data:/data
      - /data/kafka3/log:/datalog
    restart: unless-stopped

参数说明：

    KAFKA_ZOOKEEPER_CONNECT: zk服务地址

    KAFKA_ADVERTISED_LISTENERS: kafka服务地址

3、启动

docker-compose up -d

4、查看启动的容器：docker-compose ps

出现如上结果表示启动正常~

 

测试

1、登录到 kafka1 容器内

docker-compose exec kafka1 bash

 2、创建一个 topic：名称为first，3个分区，2个副本

./opt/kafka_2.13-2.7.0/bin/kafka-topics.sh --create --topic first --zookeeper 192.168.56.101:2181 --partitions 3 --replication-factor 2

注意：副本数不能超过brokers数(分区是可以超过的)，否则会创建失败。

3、查看 topic 列表

./opt/kafka_2.13-2.7.0/bin/kafka-topics.sh --list --zookeeper 192.168.56.101:2181 

4、查看 topic 为 first 的详情

./opt/kafka_2.13-2.7.0/bin/kafka-topics.sh --describe --topic first --zookeeper 192.168.56.101:2181

5、创建一个生产者，向 topic 中发送消息

./opt/kafka_2.13-2.7.0/bin/kafka-console-producer.sh --topic first --broker-list 192.168.56.101:9092 

6、登录到 kafka2 或者 kafka3 容器内(参考第1步)，然后创建一个消费者，接收 topic 中的消息

./opt/kafka_2.13-2.7.0/bin/kafka-console-consumer.sh --topic first --bootstrap-server 192.168.56.101:9092 --from-beginning

注意：--from-beginning表示从最开始读消息，不加该参数则根据最大offset读(从最新消息开始读取)

 

总结

1、连接信息

producer     -->     broker-list
kafka集群   -->     zookeeper
consumer   -->     bootstrap-server 或 zookeeper

0.9版本以前，consumer是连向zookeeper，0.9版本以后，默认连接bootstrap-server