用docker部署zookeeper笔记

最新推荐文章于 2024-07-07 08:19:41 发布

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本文详细介绍如何使用Docker构建并运行ZooKeeper集群，包括下载JDK与ZooKeeper，编写Dockerfile，创建启动脚本，配置主机hosts文件，生成Docker镜像，启动容器，以及检查ZooKeeper状态等关键步骤。

1)下载

wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u141-b15/336fa29ff2bb4ef291e347e091f7f4a7/jdk-8u141-linux-x64.tar.gz

wget https://www-eu.apache.org/dist/zookeeper/stable/zookeeper-$ZOOKEEPER_VERSION.tar.gz

2)Dockfile编写

FROM centos

RUN yum -y install tar yum-utils hostname net-tools  
RUN mkdir /opt/java && mkdir /opt/zookeeper 
COPY jdk-8u141-linux-x64.tar.gz /opt/java

RUN tar zxf /opt/java/jdk-8u141-linux-x64.tar.gz -C /opt/java &&\ 
    JAVA_HOME=/opt/java/jdk1.8.0_141 &&\ 
    sed -i "/^PATH/i export JAVA_HOME=$JAVA_HOME" /root/.bash_profile &&\ 
    sed -i "s%^PATH.*$%&:$JAVA_HOME/bin%g" /root/.bash_profile &&\ 
    source /root/.bash_profile

ENV ZOOKEEPER_VERSION=3.4.12 
COPY zookeeper-"$ZOOKEEPER_VERSION".tar.gz /opt/zookeeper
RUN tar zxf /opt/zookeeper/zookeeper*.tar.gz -C /opt/zookeeper
COPY start.sh /opt/zookeeper/
RUN chmod +x /opt/zookeeper/start.sh
EXPOSE 2181
ENTRYPOINT ["sh", "/opt/zookeeper/start.sh", "3.4.12"]

3)zookeeper启动脚本start.sh

#!/user/bin/sh

ZOOKEEPER_VERSION=$1
source /root/.bash_profile
cp /opt/zookeeper/zookeeper-"$ZOOKEEPER_VERSION"/conf/zoo_sample.cfg /opt/zookeeper/zookeeper-"$ZOOKEEPER_VERSION"/conf/zoo.cfg
echo server.1=zk1:2888:3888 >> /opt/zookeeper/zookeeper-"$ZOOKEEPER_VERSION"/conf/zoo.cfg
echo server.2=zk2:2888:3888 >> /opt/zookeeper/zookeeper-"$ZOOKEEPER_VERSION"/conf/zoo.cfg
echo server.3=zk3:2888:3888 >> /opt/zookeeper/zookeeper-"$ZOOKEEPER_VERSION"/conf/zoo.cfg
mkdir -p /tmp/zookeeper
echo $2 > /tmp/zookeeper/myid
/opt/zookeeper/zookeeper-"$ZOOKEEPER_VERSION"/bin/zkServer.sh start-foreground

4）主机配置hosts 修改/etc/hosts末尾添加，启动的容器使用主机的hosts

172.17.0.2 zk1

172.17.0.3 zk2

172.17.0.4 zk3

生成 image：
  docker build -t myzookeeper 
启动三个容器：
  docker run -it --name zk1 --hostname zk1 $(cat /etc/hosts|awk -F ' ' '{if(NR>2){print "--add-host "$2":"$1}}') -d myzookeeper 1
  docker run -it --name zk2 --hostname zk2 $(cat /etc/hosts|awk -F ' ' '{if(NR>2){print "--add-host "$2":"$1}}') -d myzookeeper 2
  docker run -it --name zk3 --hostname zk3 $(cat /etc/hosts|awk -F ' ' '{if(NR>2){print "--add-host "$2":"$1}}') -d myzookeeper 3

6)查看所有的容器主机名和IP