Apache ZooKeeper是一个为分布式应用所设计的开源协调服务，其设计目的是为了减轻分布式应用程序所承担的协调任务。它可以为用户提供同步、配置管理、分组和命名等服务。在这里，对ZooKeeper的完全分布式集群安装部署进行介绍。

 一、基本环境

JDK　　　 ：1.8.0_11 （要求1.6+）

ZooKeeper：3.4.6

主机数：3（要求3+，且必须是奇数，因为ZooKeeper的选举算法）

主机名

IP地址

JDK

ZooKeeper

myid

master

192.168.145.129

1.8.0_11

server.1

1

slave1

192.168.145.130

1.8.0_11

server.2

2

slave2

192.168.145.131

1.8.0_11

server.3

3

 

 

 

 

二、master节点上安装配置

1、下载并解压ZooKeeper-3.4.6.tar.gz


tar -zxvf zookeeper-3.4.6.tar.gz


/home/fesh/zookeeper-3.4.6

2、设置the Java heap size  （个人感觉一般不需要配置）

　　保守地use a maximum heap size of 3GB for a 4GB machine

3、$ZOOKEEPER_HOME/conf/zoo.cfg


cp zoo_sample.cfg zoo.cfg


 　　新建此配置文件，并设置内容


zookeeper集群添加节点 zookeeper集群环境搭建_apache



# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial 
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between 
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just 
# example sakes.
dataDir=/home/fesh/data/zookeeper
# the port at which the clients will connect
clientPort=2181　server.1=master:2888:3888
　server.2=slave1:2888:3888
　server.3=slave2:2888:3888

zookeeper集群添加节点 zookeeper集群环境搭建_apache


4、/home/fesh/data/zookeeper/myid

master节点为 1


mkdir -p /home/fesh/data/zookeeper
cd /home/fesh/data/zookeeper
touch myid
echo "1" > myid


5、设置日志

conf/log4j.properties

 


# Define some default values that can be overridden by system properties
zookeeper.root.logger=INFO, CONSOLE


改为


# Define some default values that can be overridden by system properties  
zookeeper.root.logger=INFO, ROLLINGFILE


将


#
# Add ROLLINGFILE to rootLogger to get log file output
#    Log DEBUG level and above messages to a log file
log4j.appender.ROLLINGFILE=org.apache.log4j.RollingFileAppender


改为---每天一个log日志文件，而不是在同一个log文件中递增日志


#
# Add ROLLINGFILE to rootLogger to get log file output
#    Log DEBUG level and above messages to a log file
log4j.appender.ROLLINGFILE=org.apache.log4j.DailyRollingFileAppender


 

bin/zkEvn.sh


zookeeper集群添加节点 zookeeper集群环境搭建_apache



if [ "x${ZOO_LOG_DIR}" = "x" ]
then
    ZOO_LOG_DIR="."
fi

if [ "x${ZOO_LOG4J_PROP}" = "x" ]
then
    ZOO_LOG4J_PROP="INFO,CONSOLE"
fi



zookeeper集群添加节点 zookeeper集群环境搭建_apache


改为


zookeeper集群添加节点 zookeeper集群环境搭建_apache



if [ "x${ZOO_LOG_DIR}" = "x" ]
then
    ZOO_LOG_DIR="$ZOOBINDIR/../logs"
fi

if [ "x${ZOO_LOG4J_PROP}" = "x" ]
then
    ZOO_LOG4J_PROP="INFO,ROLLINGFILE"
fi



zookeeper集群添加节点 zookeeper集群环境搭建_apache


 

 

 参考：Zookeeper运维的一些经验

 http://mp.weixin.qq.com/s?__biz=MzAxMjQ5NDM1Mg==&mid=2651024176&idx=1&sn=7659ea6a7bf5c37b083e30060c3e55ca&chksm=8047384fb730b1591ff1ce7081822577112087fc7ec3976f020a263b503f6a8ef0856b3a3057&scene=0#wechat_redirect&utm_source=tuicool&utm_medium=referral

三、从master节点分发文件到其他节点

1、在master节点的/home/fesh/目录下


scp -r zookeeper-3.4.6 slave1:~/
scp -r zookeeper-3.4.6 slave2:~/
scp -r data slave1:~/
scp -r data slave2:~/


2、在slave1节点的/home/fesh/目录下


vi ./data/zookeeper/myid


修改为 2

3、在slave2节点的/home/fesh/目录下


vi ./data/zookeeper/myid


修改为 3

四、其他配置

1、在每个节点配置/etc/hosts （并保证每个节点/etc/hostname中分别为master、slave1、slave2） 主机 -IP地址映射


192.168.145.129    master
192.168.145.130    slave1
192.168.145.131    slave2


2、在每个节点配置环境变量/etc/profile


#Set ZOOKEEPER_HOME ENVIRONMENT
export ZOOKEEPER_HOME=/home/fesh/zookeeper-3.4.6
export PATH=$PATH:$ZOOKEEPER_HOME/bin


五、启动

每个节点上$ZOOKEEPER_HOME目录下，运行 （这里的启动顺序为 master >  slave1 >  slave2 ）


bin/zkServer.sh start


并用命令查看启动状态


bin/zkServer.sh status


master节点

zookeeper集群添加节点 zookeeper集群环境搭建_apache_07

slave1节点

zookeeper集群添加节点 zookeeper集群环境搭建_žzookeeper_08

slave2节点

 

zookeeper集群添加节点 zookeeper集群环境搭建_apache_09

（注：之前我配置正确的，但是一直都是，每个节点上都启动了，但就是互相连接不上，最后发现好像是防火墙的原因，啊啊啊！一定要先把防火墙关了！  sudo ufw disable ）

 

$ZOOKEEPER_HOME/zookeeper.out

 

参考：

1、http://zookeeper.apache.org/doc/r3.4.6/zookeeperAdmin.html