docker 搭建 zookeeper集羣

下載docker compose

新建docker compose.yml
拉取zookeeper鏡像(直接docker pull zookeeper)，通過docker compose啓動鏡像後修改第一個zoo1容器的/conf/zoo.cfg，echo "clientPort=2181" >> zoo.cfg 寫入zoo.cfg（官網拉寫來的zoo.cfg沒有這個配置項，啓動會報錯），然後將這個zoo1容器變爲鏡像 docker commit contianer_id zhangyang:zk_with_clientPort

修改docker compose.yml，image: zhangyang:zk_with_clientPort

重啓docker compose

注意：下面COMPOSE_PROJECT_NAME=zk_test是給設置一個名字
COMPOSE_PROJECT_NAME=zk_test docker-compose up
COMPOSE_PROJECT_NAME=zk_test docker-compose ps
COMPOSE_PROJECT_NAME=zk_test docker-compose down
COMPOSE_PROJECT_NAME=zk_test docker-compose config 查看配置

docker exec -it zoo1 /bin/bash 登陸zk容器
/bin/zkServer.sh status 查看集羣狀態

docker exec -it zoo2 /bin/bash 登陸zk容器
/bin/zkServer.sh status 查看集羣狀態

docker exec -it zoo3 /bin/bash 登陸zk容器
/bin/zkServer.sh status 查看集羣狀態

1.安裝下載 docker compose

https://docs.docker.com/compose/install/ 

sudo curl -L "https://github.com/docker/compose/releases/download/1.26.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

2.拉取zookeeper鏡像 docker pull zookeeper 

3.新建docker-compose.yml 

version: '2'
services:
    zoo1:
        image: zookeeper
        restart: always
        container_name: 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
        container_name: 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
        container_name: 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

3.啓動docker compose（根據配置文件創建3個docker容器）

 COMPOSE_PROJECT_NAME=zk_test docker-compose up -d

version: '2'
services:
    zoo1:
        image: zhangyang:zk_with_clientPort
        restart: always
        container_name: 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: zhangyang:zk_with_clientPort
        restart: always
        container_name: 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: zhangyang:zk_with_clientPort
        restart: always
        container_name: 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.查看狀態

COMPOSE_PROJECT_NAME=zk_test docker-compose ps

docker ps -a

5.登陸docker容器查看zk狀態

docker exec -it zoo1 /bin/bash 登陸zk容器
/bin/zkServer.sh status 查看集羣狀態

docker exec -it zoo2 /bin/bash 登陸zk容器
/bin/zkServer.sh status 查看集羣狀態

docker exec -it zoo3 /bin/bash 登陸zk容器
/bin/zkServer.sh status 查看集羣狀態

結果是zoo3爲master節點，其他兩個是slave節點。

通過docker命令連接zk客戶端

docker run -it --rm \
        --link zoo1:zk1 \
        --link zoo2:zk2 \
        --link zoo3:zk3 \
        --net zk_test_default \
        zookeeper zkCli.sh -server zk1:2181,zk2:2181,zk3:2181

看的到我們連接的是zoo3這個master節點，連接好後可以對zk進行操作，添加節點、數據等。