Docker搭建Zookeeper集群

以CentOS7为例

1.检查pip是否已安装

pip -V

如果显示版本python xxx则已安装跳过第2步执行第3步, 否则显示pip: command not found

2.安装pip

# 
yum -y install epel-release
yum -y install python-pip
#升级
pip install --upgrade pip

3.安装docker-compose

pip install docker-compose
# 检查docker-compose
docker-compose -version

4.Zookeeper集群

4.1. pull zookeeper

docker pull zookeeper

4.2. 创建docker-compose.yml文件

touch docker-compose.yml
# or
vim docker-compose.yml

4.3. 在docker-compose.yml中添加对应的集群信息

version: '3'
services:
    zoo1:
        image: zookeeper
        restart: always
        hostname: zoo1
        ports:
            - 2181:2181
        environment:
            ZOO_MY_ID: 1
            ZOO_SERVERS: server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888

    zoo2:
        image: zookeeper
        restart: always
        hostname: zoo2
        ports:
            - 2182:2181
        environment:
            ZOO_MY_ID: 2
            ZOO_SERVERS: server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888

    zoo3:
        image: zookeeper
        restart: always
        hostname: zoo3
        ports:
            - 2183:2181
        environment:
            ZOO_MY_ID: 3
            ZOO_SERVERS: server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888

4.4. 执行启动命令

docker-compose up -d

显示

Creating network "root_default" with the default driver
Creating root_zoo1_1 ... done
Creating root_zoo2_1 ... done
Creating root_zoo3_1 ... done

执行docker ps此时3个容器出现

4cf5ab0f7b2c zookeeper:latest "/docker-entrypoint.…"   26 minutes ago Up 26 minutes  2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2183->2181/tcp                                                                                                          root_zoo3_1
12638806d642  zookeeper:latest "/docker-entrypoint.…"   26 minutes ago Up 26 minutes  2888/tcp, 3888/tcp, 0.0.0.0:2181->2181/tcp, 8080/tcp                                                                                                          root_zoo1_1
d218b4ded21f zookeeper:latest "/docker-entrypoint.…"   26 minutes ago Up 26 minutes  2888/tcp, 3888/tcp, 8080/tcp, 0.0.0.0:2182->2181/tcp                                                                                                          root_zoo2_1

好了恭喜你集群成功!