docker如何搭建kafka集群(docker,kafka,开发技术)

一、原生Docker命令

1. 删除所有dangling数据卷（即无用的Volume，僵尸文件）

dockervolumerm$(dockervolumels-qfdangling=true)

2. 删除所有dangling镜像（即无tag的镜像）

dockerrmi$(dockerimages|grep"^<none>"|awk"{print$3}"

3. 删除所有关闭的容器

dockerps-a|grepExit|cut-d''-f1|xargsdockerrm

二、镜像选择

环境为M1版本的mbp:

• Zookeeper采用zookeeper

• Kafka采用wurstmeister/kafka

• Kafka-Manager采用scjtqs/kafka-manager

• Mysql采用mysql/mysql-server

三、集群规划

1. 新建docker网络

dockernetworkcreatedocker-net--subnet172.20.10.0/16

dockernetworkls

2. 集群规划

hostnameIp addrportlistenerzook1172.20.10.112184:2181zook2172.20.10.122185:2181zook3172.20.10.132186:2181kafka1172.20.10.14内部9092:9092，外部9192:9192kafka1kafka2172.20.10.15内部9093:9093，外部9193:9193kafka2Kafka3172.20.10.16内部9094:9094，外部9194:9194Kafka3本机（宿主机Mbp）172.20.10.2kafka manager172.20.10.109000:9000

四、Zookeeper集群安装

1. 新建文件zk-docker-compose.yml

version:'3.4'services:zook1:image:zookeeper:latestrestart:alwayshostname:zook1container_name:zook1#容器名称，方便在rancher中显示有意义的名称ports:-2183:2181#将本容器的zookeeper默认端口号映射出去volumes:#挂载数据卷-"/Users/konsy/Development/volume/zkcluster/zook1/data:/data"-"/Users/konsy/Development/volume/zkcluster/zook1/datalog:/datalog"-"/Users/konsy/Development/volume/zkcluster/zook1/logs:/logs"environment:ZOO_MY_ID:1#即是zookeeper的节点值，也是kafka的brokerid值ZOO_SERVERS:server.1=zook1:2888:3888;2181server.2=zook2:2888:3888;2181server.3=zook3:2888:3888;2181networks:docker-net:ipv4_address:172.20.10.11zook2:image:zookeeper:latestrestart:alwayshostname:zook2container_name:zook2#容器名称，方便在rancher中显示有意义的名称ports:-2184:2181#将本容器的zookeeper默认端口号映射出去volumes:-"/Users/konsy/Development/volume/zkcluster/zook2/data:/data"-"/Users/konsy/Development/volume/zkcluster/zook2/datalog:/datalog"-"/Users/konsy/Development/volume/zkcluster/zook2/logs:/logs"environment:ZOO_MY_ID:2#即是zookeeper的节点值，也是kafka的brokerid值ZOO_SERVERS:server.1=zook1:2888:3888;2181server.2=zook2:2888:3888;2181server.3=zook3:2888:3888;2181networks:docker-net:ipv4_address:172.20.10.12zook3:image:zookeeper:latestrestart:alwayshostname:zook3container_name:zook3#容器名称，方便在rancher中显示有意义的名称ports:-2185:2181#将本容器的zookeeper默认端口号映射出去volumes:-"/Users/konsy/Development/volume/zkcluster/zook3/data:/data"-"/Users/konsy/Development/volume/zkcluster/zook3/datalog:/datalog"-"/Users/konsy/Development/volume/zkcluster/zook3/logs:/logs"environment:ZOO_MY_ID:3#即是zookeeper的节点值，也是kafka的brokerid值ZOO_SERVERS:server.1=zook1:2888:3888;2181server.2=zook2:2888:3888;2181server.3=zook3:2888:3888;2181networks:docker-net:ipv4_address:172.20.10.13networks:docker-net:external:name:docker-net

2. 执行脚本部署zookeeper至Docker:

dockercompose-f./zk-docker-compose.ymlup-d

五、Kafka集群安装

1. 新建文件kafka-docker-compose.yml

version:'2'services:kafka1:image:docker.io/wurstmeister/kafkarestart:alwayshostname:kafka1container_name:kafka1ports:-9093:9093-9193:9193environment:KAFKA_BROKER_ID:1KAFKA_LISTENERS:INSIDE://:9093,OUTSIDE://:9193#KAFKA_ADVERTISED_LISTENERS=INSIDE://<container>:9092,OUTSIDE://<host>:9094SKAFKA_ADVERTISED_LISTENERS:INSIDE://kafka1:9093,OUTSIDE://localhost:9193KAFKA_LISTENER_SECURITY_PROTOCOL_MAP:INSIDE:PLAINTEXT,OUTSIDE:PLAINTEXTKAFKA_INTER_BROKER_LISTENER_NAME:INSIDEKAFKA_ZOOKEEPER_CONNECT:zook1:2181,zook2:2181,zook3:2181ALLOW_PLAINTEXT_LISTENER:'yes'JMX_PORT:9999#开放JMX监控端口，来监测集群数据volumes:-/Users/konsy/Development/volume/kafka/kafka1/wurstmeister/kafka:/wurstmeister/kafka-/Users/konsy/Development/volume/kafka/kafka1/kafka:/kafkaexternal_links:-zook1-zook2-zook3networks:docker-net:ipv4_address:172.20.10.14kafka2:image:docker.io/wurstmeister/kafkarestart:alwayshostname:kafka2container_name:kafka2ports:-9094:9094-9194:9194environment:KAFKA_BROKER_ID:2KAFKA_LISTENERS:INSIDE://:9094,OUTSIDE://:9194#KAFKA_ADVERTISED_LISTENERS=INSIDE://<container>:9092,OUTSIDE://<host>:9094KAFKA_ADVERTISED_LISTENERS:INSIDE://kafka2:9094,OUTSIDE://localhost:9194KAFKA_LISTENER_SECURITY_PROTOCOL_MAP:INSIDE:PLAINTEXT,OUTSIDE:PLAINTEXTKAFKA_INTER_BROKER_LISTENER_NAME:INSIDEKAFKA_ZOOKEEPER_CONNECT:zook1:2181,zook2:2181,zook3:2181ALLOW_PLAINTEXT_LISTENER:'yes'JMX_PORT:9999#开放JMX监控端口，来监测集群数据volumes:-/Users/konsy/Development/volume/kafka/kafka2/wurstmeister/kafka:/wurstmeister/kafka-/Users/konsy/Development/volume/kafka/kafka2/kafka:/kafkaexternal_links:-zook1-zook2-zook3networks:docker-net:ipv4_address:172.20.10.15kafka3:image:docker.io/wurstmeister/kafkarestart:alwayshostname:kafka3container_name:kafka3ports:-9095:9095-9195:9195environment:KAFKA_BROKER_ID:3KAFKA_LISTENERS:INSIDE://:9095,OUTSIDE://:9195#KAFKA_ADVERTISED_LISTENERS=INSIDE://<container>:9092,OUTSIDE://<host>:9094KAFKA_ADVERTISED_LISTENERS:INSIDE://kafka3:9095,OUTSIDE://localhost:9195KAFKA_LISTENER_SECURITY_PROTOCOL_MAP:INSIDE:PLAINTEXT,OUTSIDE:PLAINTEXTKAFKA_INTER_BROKER_LISTENER_NAME:INSIDEKAFKA_ZOOKEEPER_CONNECT:zook1:2181,zook2:2181,zook3:2181ALLOW_PLAINTEXT_LISTENER:'yes'JMX_PORT:9999#开放JMX监控端口，来监测集群数据volumes:-/Users/konsy/Development/volume/kafka/kafka3/wurstmeister/kafka:/wurstmeister/kafka-/Users/konsy/Development/volume/kafka/kafka3/kafka:/kafkaexternal_links:-zook1-zook2-zook3networks:docker-net:ipv4_address:172.20.10.16networks:docker-net:external:name:docker-net

2. 执行脚本部署kafka至Docker:

dockercompose-f./kafka-docker-compose.ymlup-d

3. listeners 和 advertised.listeners

• listeners: 学名叫监听器，其实就是告诉外部连接者要通过什么协议访问指定主机名和端口开放的 Kafka 服务。

• advertised.listeners：和 listeners 相比多了个 advertised。Advertised 的含义表示宣称的、公布的，就是说这组监听器是 Broker 用于对外发布的。

比如说：

listeners:INSIDE://172.17.0.10:9092,OUTSIDE://172.17.0.10:9094advertised_listeners:INSIDE://172.17.0.10:9092,OUTSIDE://<公网ip>:端口kafka_listener_security_protocol_map:"INSIDE:SASL_PLAINTEXT,OUTSIDE:SASL_PLAINTEXT"kafka_inter_broker_listener_name:"INSIDE"

advertised_listeners 监听器会注册在 zookeeper 中；

当我们对 172.17.0.10:9092 请求建立连接，kafka 服务器会通过 zookeeper 中注册的监听器，找到 INSIDE 监听器，然后通过 listeners 中找到对应的 通讯 ip 和 端口；

同理，当我们对 <公网 ip>:端口 请求建立连接，kafka 服务器会通过 zookeeper 中注册的监听器，找到 OUTSIDE 监听器，然后通过 listeners 中找到对应的 通讯 ip 和 端口 172.17.0.10:9094；

总结：advertised_listeners 是对外暴露的服务端口，真正建立连接用的是 listeners。

4.安装kafka-manager

4.1 新建文件kafka-manager-docker-compose.yml

version:'2'services:kafka-manager:image:scjtqs/kafka-manager:latestrestart:alwayshostname:kafka-managercontainer_name:kafka-managerports:-9000:9000external_links:#连接本compose文件以外的container-zook1-zook2-zook3-kafka1-kafka2-kafka3environment:ZK_HOSTS:zook1:2181,zook2:2181,zook3:2181KAFKA_BROKERS:kafka1:9093,kafka2:9094,kafka3:9095APPLICATION_SECRET:letmeinKM_ARGS:-Djava.net.preferIPv4Stack=truenetworks:docker-net:ipv4_address:172.20.10.10networks:docker-net:external:name:docker-net

4.2 执行脚本部署kafka-manager至Docker:

dockercompose-f./kafka-manager-docker-compose.ymlup-d

4.3 配置Cluster

5. 测试kafka

5.1连接容器

进入kafka容器的命令行：

dockerexec-tikafka/bin/bash

进入kafka所在目录：

cdopt/kafka_2.13-2.8.1/

5.2 创建Replication为2，Partition为2的topic

bin/kafka-topics.sh--create--zookeeperzook1:2181--replication-factor2--partitions2--topicpartopic

5.3 查看topic的状态

在kafka容器中的 opt/kafka_2.12-1.1.0/ 目录下输入

bin/kafka-topics.sh--describe--zookeeperzook1:2181--topicpartopic

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