ZooKeeper ：Docker Compose部署ZooKeeper集群

用于Docker Compose部署ZooKeeper集群的yaml檔案：

version: '3'
networks:
  zookeeper-networks:
    driver: bridge

services:
  zookeeper1:
    image: zookeeper
    container_name: zookeeper1
    restart: always
    ports:
      - 9001:2181
    volumes:
      - "/usr/local/docker-compose/zookeeper/zookeeper1/data:/data"
      - "/usr/local/docker-compose/zookeeper/zookeeper1/datalog:/datalog"
      - "/usr/local/docker-compose/zookeeper/zookeeper1/logs:/logs"
      - "/usr/local/docker-compose/zookeeper/zookeeper1/conf:/conf"
    environment:
      ZOO_MY_ID: 1
      ZOO_SERVERS: server.1=zookeeper1:2888:3888 server.2=zookeeper2:2888:3888 server.3=zookeeper3:2888:3888
    networks:
      - zookeeper-networks

  zookeeper2:
    image: zookeeper
    container_name: zookeeper2
    restart: always
    ports:
      - 9002:2181
    volumes:
      - "/usr/local/docker-compose/zookeeper/zookeeper2/data:/data"
      - "/usr/local/docker-compose/zookeeper/zookeeper2/datalog:/datalog"
      - "/usr/local/docker-compose/zookeeper/zookeeper2/logs:/logs"
      - "/usr/local/docker-compose/zookeeper/zookeeper2/conf:/conf"
    environment:
      ZOO_MY_ID: 2
      ZOO_SERVERS: server.1=zookeeper1:2888:3888 server.2=zookeeper2:2888:3888 server.3=zookeeper3:2888:3888
    networks:
      - zookeeper-networks

  zookeeper3:
    image: zookeeper
    container_name: zookeeper3
    restart: always
    ports:
      - 9003:2181
    volumes:
      - "/usr/local/docker-compose/zookeeper/zookeeper3/data:/data"
      - "/usr/local/docker-compose/zookeeper/zookeeper3/datalog:/datalog"
      - "/usr/local/docker-compose/zookeeper/zookeeper3/logs:/logs"
      - "/usr/local/docker-compose/zookeeper/zookeeper3/conf:/conf"
    environment:
      ZOO_MY_ID: 3
      ZOO_SERVERS: server.1=zookeeper1:2888:3888 server.2=zookeeper2:2888:3888 server.3=zookeeper3:2888:3888
    networks:
      - zookeeper-networks

創建用于存放組態檔的目錄：

mkdir -p /usr/local/docker-compose/zookeeper/zookeeper1/conf /usr/local/docker-compose/zookeeper/zookeeper2/conf /usr/local/docker-compose/zookeeper/zookeeper3/con

創建組態檔：

vim /usr/local/docker-compose/zookeeper/zookeeper1/conf/zoo.cfg

組態檔的內容如下所示：

tickTime=2000
initLimit=10
syncLimit=5
dataDir=/data
dataLogDir=/datalog
clientPort=2181
# 擴展型別啟用，設定為true才能創建TTL型別的節點
extendedTypesEnabled=true
# 集群配置
server.1=zookeeper1:2888:3888
server.2=zookeeper2:2888:3888
server.3=zookeeper3:2888:3888

• tickTime：ZooKeeper中最小的時間單位長度 （默認2000ms），
• initLimit：follower節點啟動后與leader節點完成資料同步的時間（指定為tickTime的倍數，默認10倍，即20s），
• syncLimit：leader節點和follower節點進行心跳檢測的最大延遲時間（指定為tickTime的倍數，默認5倍，即10s），
• dataDir：表示ZooKeeper存盤快照檔案的目錄（默認為/tmp/zookeeper），
• dataLogDir：表示ZooKeeper事務日志的存盤路徑，默認指定在dataDir目錄下 ，
• clientPort：表示ZooKeeper客戶端和ZooKeeper服務端建立連接的埠號（默認 2181），

將組態檔復制到其他ZooKeeper節點掛載的組態檔目錄：

cp /usr/local/docker-compose/zookeeper/zookeeper1/conf/zoo.cfg /usr/local/docker-compose/zookeeper/zookeeper2/conf/
cp /usr/local/docker-compose/zookeeper/zookeeper1/conf/zoo.cfg /usr/local/docker-compose/zookeeper/zookeeper3/conf/

開始部署ZooKeeper集群：

docker compose -f /root/composefile/zookeeper/zookeeper.yaml up -d

-f指定yaml檔案位置，-d表示后臺運行，

docker ps和docker compose ls命令都可以查詢服務是否啟動成功：

Docker部署在192.168.1.9上，

使用另外一臺有ZooKeeper檔案的虛擬機進行測驗，

./zkCli.sh -timeout 5000 -server 192.168.1.9:9001

測驗創建TTL型別的節點，

[zk: 192.168.1.9:9001(CONNECTED) 1] ls /
[zookeeper]
[zk: 192.168.1.9:9001(CONNECTED) 2] create -t 10 /kaven
Created /kaven
[zk: 192.168.1.9:9001(CONNECTED) 3] ls /
[kaven, zookeeper]
[zk: 192.168.1.9:9001(CONNECTED) 4] ls /
[kaven, zookeeper]
[zk: 192.168.1.9:9001(CONNECTED) 5] ls /
[kaven, zookeeper]
[zk: 192.168.1.9:9001(CONNECTED) 6] ls /
[kaven, zookeeper]
[zk: 192.168.1.9:9001(CONNECTED) 7] ls /
[kaven, zookeeper]
[zk: 192.168.1.9:9001(CONNECTED) 8] ls /
[zookeeper]

使用Docker Compose部署ZooKeeper集群就介紹到這里，如果博主有說錯的地方或者大家有不同的見解，歡迎大家評論補充，