CentOS下使用Docker實現Zookeeper集羣部署

環境

    1.三臺虛擬機（192.168.5.29，192.168.5.20，192.168.5.21）

    2.安裝docker、docker-compose、拉取鏡像zookeeper

#安裝docker
yum -y install docker
#啓用docker
systemtcl start docker
#與systemtcl start docker 作用相同
service docker start

#拉取zookeeper鏡像
docker pull zookeeper

#安裝pip環境
yum -y install epel-release
yum -y install python-pip
#安裝docker-compose
pip install docker-compose

#集羣下關閉防火牆，或者開放端口2888,3888
systemctl stop firewalld

單機部署

#創建zookeeper文件夾 
mkdir zookeeper

#進入zookeeper目錄
cd zookeeper


#創建Dockerfile文件
touch Dockerfile

#編寫Dockerfile文件
vi Dockerfile

######### Dockerfile ##########
FROM zookeeper:latest
EXPOSE 2181
EXPOSE 2888
EXPOSE 3888
EXPOSE 8080
###############################


#創建conf文件夾
mkdir conf
#創建zoo.cfg文件
touch conf/zoo.cfg
#編寫zoo.cfg文件
vi conf/zoo.cfg

######### zoo.cfg #############
dataDir=/data
dataLogDir=/datalog
clientPort=2181
4lw.commands.whitelist=*
tickTime=2000
initLimit=5
syncLimit=2
autopurge.snapRetainCount=3
autopurge.purgeInterval=0
maxClientCnxns=60
standaloneEnabled=true
admin.enableServer=true
################################

#創建docker-compose.yml
touch docker-compose.yml
#編寫docker-compose.yml
vi docker-compose.yml

######### docker-compose.yml ########
version: '3.6'
services:
  zookeeper:
    image: zookeeper:latest
    restart: always
    container_name: zookeeper
    ports:
      - "2181:2181"
      - "2888:2888"
      - "3888:3888"
      - "28080:8080"
    volumes: 
      - "./data:/data"
      - "./datalog:/datalog"
      - "./logs:/logs"

######################################

#當前目錄情況

####->zookeeper
  ####->conf
    ####--> zoo.cfg
  ####->Dockerfile
  ####->docker-compose.yml

#進入 zookeeper目錄
#執行以下語句
docker-compose build
docker-compose up -d --force-recreate
docker-compose restart

#檢查docker運行情況
docker ps

#查看日誌
docker logs --tail="500" zookeeper

#進入容器
docker exec -it zookeeper /bin/bash

#檢查容器狀態
docker exec -it zookeeper1 /bin/bash ./bin/zkServer.sh status

集羣部署

#server1,server2,server3 各自創建
#創建zookeeper目錄
mkdir zookeeper

#進入zookeeper目錄
cd zookeeper


#創建Dockerfile文件
touch Dockerfile

#編寫Dockerfile文件
vi Dockerfile

######### Dockerfile ##########
FROM zookeeper:latest
EXPOSE 2181
EXPOSE 2888
EXPOSE 3888
EXPOSE 8080
###############################


#創建conf文件夾
mkdir conf
#創建zoo.cfg文件
touch conf/zoo.cfg
#編寫zoo.cfg文件
vi conf/zoo.cfg

######### Dockerfile ##########
dataDir=/data
dataLogDir=/datalog
clientPort=2181
4lw.commands.whitelist=*
tickTime=2000
initLimit=5
syncLimit=2
autopurge.snapRetainCount=3
autopurge.purgeInterval=0
maxClientCnxns=60
admin.enableServer=true
#機器1
server.1=192.168.5.29:2888:3888
#機器2
server.2=192.168.5.20:2888:3888
#機器3
server.3=192.168.5.21:2888:3888

###############################


#創建docker-compose.yml
touch docker-compose.yml
#編寫docker-compose.yml
vi docker-compose.yml

######### docker-compose.yml ########
version: '3.6'
services:
  zookeeper:
    image: zookeeper:3.4.12
    restart: always
    container_name: zookeeper
    privileged: true
    network_mode: "host"
    ports:
      - "2181:2181"
      - "2888:2888"
      - "3888:3888"
      - "28080:8080"
    environment:
      #### !!! 特別注意 !!! ####
      #### 這裏是機器編號 對應下面ZOO_SERVERS，記得修改 ####
      ZOO_MY_ID: 1 
      #########################
      #### 主機ip可以改爲0.0.0.0 ####
      ZOO_SERVERS: server.1=192.168.5.29:2888:3888 server.2=192.168.5.20:2888:3888 server.3=192.168.5.21:2888:3888
    volumes: 
      - "./conf/zoo.cfg:/conf/zoo.cfg"
      - "./data:/data"
      - "./datalog:/datalog"
      - "./logs:/logs"

#####################################

#當前各個主機目錄情況

####->zookeeper
  ####->conf
    ####--> zoo.cfg
  ####->Dockerfile
  ####->docker-compose.yml

#進入 zookeeper目錄
#各個主機分別執行以下語句
docker-compose build
docker-compose up -d --force-recreate
docker-compose restart

#檢查docker運行情況
docker ps

#查看日誌
docker logs --tail="500" zookeeper

#進入容器
docker exec -it zookeeper /bin/bash

#檢查容器狀態
docker exec -it zookeeper1 /bin/bash ./bin/zkServer.sh status