docker搭建kafka集群的方法實現
一、原生Docker命令
1. 刪除所有dangling數據卷（即無用的Volume，僵屍文件）
docker volume rm $(docker volume ls -qf dangling=true)
2. 刪除所有dangling鏡像（即無tag的鏡像）
docker rmi $(docker images | grep "^<none>" | awk "{print $3}"
3. 刪除所有關閉的容器
docker ps -a | grep Exit | cut -d ' ' -f 1 | xargs docker rm
二、鏡像選擇
環境為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、集群規劃
1. 新建docker網絡
docker network create docker-net --subnet 172.20.10.0/16
docker network ls
2. 集群規劃
| hostname | Ip addr | port | listener |
|---|---|---|---|
| zook1 | 172.20.10.11 | 2184:2181 | |
| zook2 | 172.20.10.12 | 2185:2181 | |
| zook3 | 172.20.10.13 | 2186:2181 | |
| kafka1 | 172.20.10.14 | 內部9092:9092，外部9192:9192 | kafka1 |
| kafka2 | 172.20.10.15 | 內部9093:9093，外部9193:9193 | kafka2 |
| Kafka3 | 172.20.10.16 | 內部9094:9094，外部9194:9194 | Kafka3 |
| 本機（宿主機Mbp） | 172.20.10.2 | ||
| kafka manager | 172.20.10.10 | 9000:9000 |
四、Zookeeper集群安裝
1. 新建文件zk-docker-compose.yml
version: '3.4' services: zook1: image: zookeeper:latest restart: always hostname: zook1 container_name: zook1 #容器名稱，方便在rancher中顯示有意義的名稱 ports: - 2183:2181 #將本容器的zookeeper默認端口號映射出去 volumes: # 掛載數據卷 - "/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的節點值，也是kafka的brokerid值 ZOO_SERVERS: server.1=zook1:2888:3888;2181 server.2=zook2:2888:3888;2181 server.3=zook3:2888:3888;2181 networks: docker-net: ipv4_address: 172.20.10.11 zook2: image: zookeeper:latest restart: always hostname: zook2 container_name: zook2 #容器名稱，方便在rancher中顯示有意義的名稱 ports: - 2184:2181 #將本容器的zookeeper默認端口號映射出去 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的節點值，也是kafka的brokerid值 ZOO_SERVERS: server.1=zook1:2888:3888;2181 server.2=zook2:2888:3888;2181 server.3=zook3:2888:3888;2181 networks: docker-net: ipv4_address: 172.20.10.12 zook3: image: zookeeper:latest restart: always hostname: zook3 container_name: zook3 #容器名稱，方便在rancher中顯示有意義的名稱 ports: - 2185:2181 #將本容器的zookeeper默認端口號映射出去 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的節點值，也是kafka的brokerid值 ZOO_SERVERS: server.1=zook1:2888:3888;2181 server.2=zook2:2888:3888;2181 server.3=zook3:2888:3888;2181 networks: docker-net: ipv4_address: 172.20.10.13 networks: docker-net: external: name: docker-net
2. 執行腳本部署zookeeper至Docker:
docker compose -f ./zk-docker-compose.yml up -d
五、Kafka集群安裝
1. 新建文件kafka-docker-compose.yml
version: '2' services: kafka1: image: docker.io/wurstmeister/kafka restart: always hostname: kafka1 container_name: kafka1 ports: - 9093:9093 - 9193:9193 environment: KAFKA_BROKER_ID: 1 KAFKA_LISTENERS: INSIDE://:9093,OUTSIDE://:9193 #KAFKA_ADVERTISED_LISTENERS=INSIDE://<container>:9092,OUTSIDE://<host>:9094 SKAFKA_ADVERTISED_LISTENERS: INSIDE://kafka1:9093,OUTSIDE://localhost:9193 KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: INSIDE:PLAINTEXT,OUTSIDE:PLAINTEXT KAFKA_INTER_BROKER_LISTENER_NAME: INSIDE KAFKA_ZOOKEEPER_CONNECT: zook1:2181,zook2:2181,zook3:2181 ALLOW_PLAINTEXT_LISTENER : 'yes' JMX_PORT: 9999 #開放JMX監控端口，來監測集群數據 volumes: - /Users/konsy/Development/volume/kafka/kafka1/wurstmeister/kafka:/wurstmeister/kafka - /Users/konsy/Development/volume/kafka/kafka1/kafka:/kafka external_links: - zook1 - zook2 - zook3 networks: docker-net: ipv4_address: 172.20.10.14 kafka2: image: docker.io/wurstmeister/kafka restart: always hostname: kafka2 container_name: kafka2 ports: - 9094:9094 - 9194:9194 environment: KAFKA_BROKER_ID: 2 KAFKA_LISTENERS: INSIDE://:9094,OUTSIDE://:9194 #KAFKA_ADVERTISED_LISTENERS=INSIDE://<container>:9092,OUTSIDE://<host>:9094 KAFKA_ADVERTISED_LISTENERS: INSIDE://kafka2:9094,OUTSIDE://localhost:9194 KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: INSIDE:PLAINTEXT,OUTSIDE:PLAINTEXT KAFKA_INTER_BROKER_LISTENER_NAME: INSIDE KAFKA_ZOOKEEPER_CONNECT: zook1:2181,zook2:2181,zook3:2181 ALLOW_PLAINTEXT_LISTENER : 'yes' JMX_PORT: 9999 #開放JMX監控端口，來監測集群數據 volumes: - /Users/konsy/Development/volume/kafka/kafka2/wurstmeister/kafka:/wurstmeister/kafka - /Users/konsy/Development/volume/kafka/kafka2/kafka:/kafka external_links: - zook1 - zook2 - zook3 networks: docker-net: ipv4_address: 172.20.10.15 kafka3: image: docker.io/wurstmeister/kafka restart: always hostname: kafka3 container_name: kafka3 ports: - 9095:9095 - 9195:9195 environment: KAFKA_BROKER_ID: 3 KAFKA_LISTENERS: INSIDE://:9095,OUTSIDE://:9195 #KAFKA_ADVERTISED_LISTENERS=INSIDE://<container>:9092,OUTSIDE://<host>:9094 KAFKA_ADVERTISED_LISTENERS: INSIDE://kafka3:9095,OUTSIDE://localhost:9195 KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: INSIDE:PLAINTEXT,OUTSIDE:PLAINTEXT KAFKA_INTER_BROKER_LISTENER_NAME: INSIDE KAFKA_ZOOKEEPER_CONNECT: zook1:2181,zook2:2181,zook3:2181 ALLOW_PLAINTEXT_LISTENER : 'yes' JMX_PORT: 9999 #開放JMX監控端口，來監測集群數據 volumes: - /Users/konsy/Development/volume/kafka/kafka3/wurstmeister/kafka:/wurstmeister/kafka - /Users/konsy/Development/volume/kafka/kafka3/kafka:/kafka external_links: - zook1 - zook2 - zook3 networks: docker-net: ipv4_address: 172.20.10.16 networks: docker-net: external: name: docker-net
2. 執行腳本部署kafka至Docker:
docker compose -f ./kafka-docker-compose.yml up -d
3. listeners 和 advertised.listeners
- listeners: 學名叫監聽器，其實就是告訴外部連接者要通過什麼協議訪問指定主機名和端口開放的 Kafka 服務。
- advertised.listeners：和 listeners 相比多瞭個 advertised。Advertised 的含義表示宣稱的、公佈的，就是說這組監聽器是 Broker 用於對外發佈的。
比如說：
listeners: INSIDE://172.17.0.10:9092,OUTSIDE://172.17.0.10:9094 advertised_listeners: INSIDE://172.17.0.10:9092,OUTSIDE://<公網 ip>:端口 kafka_listener_security_protocol_map: "INSIDE:SASL_PLAINTEXT,OUTSIDE:SASL_PLAINTEXT" kafka_inter_broker_listener_name: "INSIDE"
advertised_listeners 監聽器會註冊在 zookeeper 中；
當我們對 172.17.0.10:9092 請求建立連接，kafka 服務器會通過 zookeeper 中註冊的監聽器，找到 INSIDE 監聽器，然後通過 listeners 中找到對應的 通訊 ip 和 端口；
同理，當我們對 <公網 ip>:端口 請求建立連接，kafka 服務器會通過 zookeeper 中註冊的監聽器，找到 OUTSIDE 監聽器，然後通過 listeners 中找到對應的 通訊 ip 和 端口 172.17.0.10:9094；
總結：advertised_listeners 是對外暴露的服務端口，真正建立連接用的是 listeners。
4.安裝kafka-manager
4.1 新建文件kafka-manager-docker-compose.yml
version: '2' services: kafka-manager: image: scjtqs/kafka-manager:latest restart: always hostname: kafka-manager container_name: kafka-manager ports: - 9000:9000 external_links: # 連接本compose文件以外的container - zook1 - zook2 - zook3 - kafka1 - kafka2 - kafka3 environment: ZK_HOSTS: zook1:2181,zook2:2181,zook3:2181 KAFKA_BROKERS: kafka1:9093,kafka2:9094,kafka3:9095 APPLICATION_SECRET: letmein KM_ARGS: -Djava.net.preferIPv4Stack=true networks: docker-net: ipv4_address: 172.20.10.10 networks: docker-net: external: name: docker-net
4.2 執行腳本部署kafka-manager至Docker:
docker compose -f ./kafka-manager-docker-compose.yml up -d
4.3 配置Cluster
5. 測試kafka
5.1連接容器
進入kafka容器的命令行：
docker exec -ti kafka /bin/bash
進入kafka所在目錄：
cd opt/kafka_2.13-2.8.1/
5.2 創建Replication為2，Partition為2的topic
bin/kafka-topics.sh --create --zookeeper zook1:2181 --replication-factor 2 --partitions 2 --topic partopic
5.3 查看topic的狀態
在kafka容器中的 opt/kafka_2.12-1.1.0/ 目錄下輸入
bin/kafka-topics.sh --describe --zookeeper zook1:2181 --topic partopic
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