Zookeeper学习笔记2

环境搭建

JDK(>1.6)安装

略

Zookeeper安装

1、下载

http://mirror.bit.edu.cn/apache/zookeeper/stable/zookeeper-3.4.10.tar.gz

2、解压

tar -zxvf zookeeper-3.4.10.tar.gz

3、在zookeeper-xx/conf文件夹下面创建配置文件，可直接复制zoo_sample.cfg

cp zoo_sample.cfg zoo.cfg

看看内容：

# 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.
dataDir=/tmp/zookeeper
# the port at which the clients will connect
clientPort=2181

运行

单机环境

1、配置文件默认zoo.cfg

2、启动服务

3、启动客户端

集群环境

搭建集群只需要修改配置文件，添加一个myid的文件

1、zoo.cfg

# 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.
dataDir=/tmp/zookeeper
# the port at which the clients will connect
clientPort=2181
server.1=192.168.2.192:2888:3888
server.2=192.168.2.200:2888:3888
server.3=192.168.2.233:2888:3888

server.server_id=server_ip:port_1:port_2

server_id:服务器编号1~255

server_ip：服务器ip

port_1:flower和leader同步数据的端口

port_2:flower进行leader选举的端口

2、在192.168.2.192机器上添加/tmp/zookeeper/myid

内容为1，

同理，其他机器的zoo.cfg一样，添加对应的myid文件

3、在其中任意台机器中运行

./bin/zkServer.sh status

你将会看到是leader还是flower

JMX enabled by default
Using config: /opt/Java/zookeeper-3.3.6/bin/../conf/zoo.cfg
Mode: leader

如果提示未运行，请查看zookeeper.out找到原因

4、在任一台机器创建节点，其他机器将同步数据