Docker部署Kafka

Docker安装Kafka

1.安装zookeeper

docker run -d --name zookeeper -p 2181:2181 -v /etc/localtime:/etc/localtime wurstmeister/zookeeper:latest

2.安装Kafka

docker run  -d --name kafka -p 9092:9092 -e KAFKA_BROKER_ID=0 -e KAFKA_ZOOKEEPER_CONNECT=zookeeper:2181 -e KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://kafka:9092 -e KAFKA_LISTENERS=PLAINTEXT://kafka:9092 -t wurstmeister/kafka:latest

-e KAFKA_BROKER_ID=0 在kafka集群中，每个kafka都有一个BROKER_ID来区分自己
-e KAFKA_ZOOKEEPER_CONNECT=zookeeper:2181/kafka 配置zookeeper管理kafka的路径zookeeper:2181/kafka
-e KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://kafka:9092 把kafka的地址端口注册给zookeeper
-e KAFKA_LISTENERS=PLAINTEXT://kafka:9092 配置kafka的监听端口
-v /etc/localtime:/etc/localtime 容器时间同步虚拟机的时间

Docker Compose安装Kafka

1.编写docker-compose.yml脚本

version: "3.2"

services:
    zookeeper:
        image: zookeeper:latest
        restart: always
		#network_mode: "host"
        container_name: zookeeper
        ports:
            - "2181:2181"
        expose:
            - "2181"
        environment:
            - ZOO_MY_ID=1
    kafka:
        image: wurstmeister/kafka:latest
        restart: always
		#network_mode: "host"
        container_name: kafka
        environment:
            - KAFKA_BROKER_ID=1
            - KAFKA_LISTENERS=PLAINTEXT://kafka:9092
            - KAFKA_ZOOKEEPER_CONNECT=zookeeper:2181
            - KAFKA_MESSAGE_MAX_BYTES=2000000
        ports:
            - "9092:9092"
        depends_on:
            - zookeeper

2.拉取镜像

docker-compose pull

3.构建镜像、创建容器并启动

docker-compose up -d

4.查看Kafka是否启动成功

docker-compose ps

配置Kafka server.properties

1.进入容器

docker exec -it kafka /bin/bash

2.切换到config目录（Kafka配置文件路径：opt/kafka/config）

cd opt/kafka/config

3.编辑server.properties文件

vi server.properties

// 1.增加advertised.host.name如果设置，则就作为broker 的hostname发往producer、consumers以及其他brokers
advertised.host.name=宿主机IP
// 2.设置Kafka自动创建topic
auto.create.topics.enable=true
// 3.设置允许删除topic
delete.topic.enable=true

4.退出容器，重启Kafka

docker-compose restart kafka

Kafka常用命令

Kafka查看所有topic
	kafka-topics.sh --list --zookeeper 172.16.2.89:2181
kafka创建topic
	kafka-topics.sh --create --topic TRS_Notify --zookeeper 172.16.2.89:2181 --config max.message.bytes=1280000 --config flush.messages=1 --partitions 1 --replication-factor 1
	//--topic后面的test0是topic的名称--zookeeper应该和server.properties文件中的zookeeper.connect一样--config指定当前topic上有效的参数值--partitions指定topic的partition数量，如果不指定该数量，默认是server.properties文件中的num.partitions配置值--replication-factor指定每个partition的副本个数，默认1个
启动Kafka生产者
	kafka-console-producer.sh --broker-list 172.16.2.89:9092 --topic TRS_Notify
启动Kafka消费者
	#从头开始$KAFKA_HOME/bin/kafka-console-consumer.sh --bootstrap-server 172.16.2.89:9092 --topic TRS_Notify --from-beginning
	#从尾部开始$KAFKA_HOME/bin/kafka-console-consumer.sh --bootstrap-server 172.16.2.89:9092 --topic TRS_Notify --offset latest
	#指定分区$KAFKA_HOME/bin/kafka-console-consumer.sh --bootstrap-server 172.16.2.89:9092 --topic TRS_Notify --offset latest --partition 1
	#取指定个数$KAFKA_HOME/bin/kafka-console-consumer.sh --bootstrap-server 172.16.2.89:9092 --topic TRS_Notify --offset latest --partition 1 --max-messages 1
删除kafka的topic
	kafka-topics.sh --delete --zookeeper 172.16.2.89:2181 --topic TRS_Notify
	#删除zookeeper中该topic相关的目录命令：rm -r /kafka/config/topics/TRS_Notify rm -r /kafka/brokers/topics/TRS_Notify