ZooKeeper ：Docker Compose部署ZooKeeper集群

用于Docker Compose部署ZooKeeper集群的yaml文件：

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

创建用于存放配置文件的目录：

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

创建配置文件：

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

配置文件的内容如下所示：

tickTime=2000
initLimit=10
syncLimit=5
dataDir=/data
dataLogDir=/datalog
clientPort=2181
# 扩展类型启用，设置为true才能创建TTL类型的节点
extendedTypesEnabled=true
# 集群配置
server.1=zookeeper1:2888:3888
server.2=zookeeper2:2888:3888
server.3=zookeeper3:2888:3888

tickTime：ZooKeeper中最小的时间单位长度 （默认2000ms）。initLimit：follower节点启动后与leader节点完成数据同步的时间（指定为tickTime的倍数，默认10倍，即20s）。syncLimit：leader节点和follower节点进行心跳检测的最大延迟时间（指定为tickTime的倍数，默认5倍，即10s）。dataDir：表示ZooKeeper存储快照文件的目录（默认为/tmp/zookeeper）。dataLogDir：表示ZooKeeper事务日志的存储路径，默认指定在dataDir目录下 。clientPort：表示ZooKeeper客户端和ZooKeeper服务端建立连接的端口号（默认 2181）。

将配置文件复制到其他ZooKeeper节点挂载的配置文件目录：

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/

开始部署ZooKeeper集群：

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

-f指定yaml文件位置，-d表示后台运行。

docker ps和docker compose ls命令都可以查询服务是否启动成功：

Docker部署在192.168.1.9上。

使用另外一台有ZooKeeper文件的虚拟机进行测试。

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

测试创建TTL类型的节点。

[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集群就介绍到这里，如果博主有说错的地方或者大家有不同的见解，欢迎大家评论补充。