centos下zookeeper集群搭建

单机模式:

 

1)  首先下载zookeeper压缩包, 这里采用zookeeper3.4.8....

wget http://mirror.bit.edu.cn/apache/zookeeper/zookeeper-3.4.8/zookeeper-3.4.8.tar.gz

  

2)   解压缩

  首先创建文件夹,这里放到/user/zookeeper/文件夹下

mkdir zookeeper1

  

mkdir zookeeper2

  

mkdir zookeeper3

创建三个文件夹用于存放三个实例,下面解压到目标文件夹,找到压缩包存放路径,执行下面命令

  

 tar -zxvf zookeeper-3.4.8.tar.gz -C /usr/zookeeper/zookeeper1

  

 tar -zxvf zookeeper-3.4.8.tar.gz -C /usr/zookeeper/zookeeper2

  

 tar -zxvf zookeeper-3.4.8.tar.gz -C /usr/zookeeper/zookeeper3

3)运行单价环境

     先来整下zookeeper1这个实例,首先

  

cd zookeeper1/ 

  利用ll命令, 显示所有文件详情,

drwxr-xr-x. 2 1000 1000 4096 Mar 17 17:27 bin
-rw-rw-r--. 1 1000 1000 83235 Feb 6 11:46 build.xml
-rw-rw-r--. 1 1000 1000 88625 Feb 6 11:46 CHANGES.txt
drwxr-xr-x. 2 1000 1000 4096 Mar 17 17:21 conf
drwxr-xr-x. 10 1000 1000 4096 Feb 6 11:46 contrib
drwxr-xr-x. 2 1000 1000 4096 Feb 6 11:50 dist-maven
drwxr-xr-x. 6 1000 1000 4096 Feb 6 11:49 docs
-rw-rw-r--. 1 1000 1000 1953 Feb 6 11:46 ivysettings.xml
-rw-rw-r--. 1 1000 1000 3498 Feb 6 11:46 ivy.xml
drwxr-xr-x. 4 1000 1000 4096 Feb 6 11:49 lib
-rw-rw-r--. 1 1000 1000 11938 Feb 6 11:46 LICENSE.txt
-rw-rw-r--. 1 1000 1000 171 Feb 6 11:46 NOTICE.txt
-rw-rw-r--. 1 1000 1000 1770 Feb 6 11:46 README_packaging.txt
-rw-rw-r--. 1 1000 1000 1585 Feb 6 11:46 README.txt
drwxr-xr-x. 5 1000 1000 4096 Feb 6 11:46 recipes
drwxr-xr-x. 8 1000 1000 4096 Feb 6 11:49 src
-rw-rw-r--. 1 1000 1000 1360961 Feb 6 11:46 zookeeper-3.4.8.jar
-rw-rw-r--. 1 1000 1000 819 Feb 6 11:50 zookeeper-3.4.8.jar.asc
-rw-rw-r--. 1 1000 1000 33 Feb 6 11:46 zookeeper-3.4.8.jar.md5
-rw-rw-r--. 1 1000 1000 41 Feb 6 11:46 zookeeper-3.4.8.jar.sha1

 cp下配置文件,

mv conf/zoo_sample.cfg conf/zoo.cfg

  启动zk,

 ./bin/zdServer.sh start

 

4) 使用java 客户端连接ZooKeeper

 ./bin/zkCli.sh -server 127.0.0.1:2181

  然后就可以使用各种命令了,跟文件操作命令很类似,输入help可以看到所有命令。

5)  关闭

./bin/zdServer.sh stop

  

   

分布式模式(Replicated mode)

ZooKeeper集群一般被称为ZooKeeper ensemble,或者 quorum.

因为我们这里只有一台机器,通过不同端口号,做成伪集群的方式,如果你机器比较多,可以在每个机器上安装一个zk,配置方式是类似。

 

所谓 “伪分布式集群” 就是在,在一台PC中,启动多个ZooKeeper的实例。“完全分布式集群” 是每台PC,启动一个ZooKeeper实例。

 

ZooKeeper不存在明显的master/slave关系,各个节点都是服务器,leader挂了,会立马从follower中选举一个出来作为leader.

由于没有主从关系,也不用配置SSH无密码登录了,各个zk服务器是自己启动的,互相之间通过TCP端口来交换数据

 

将zookeeper2,zookeeper3的配置文件改下,因为zookeeper1在我们做单机时候,已经修改过,在zookeeper2,zookeeper3 conf文件夹下,执行

mv zoo_sample.cfg zoo.cfg

  

创建环境目录

切换到var/zookeeper路径下,新建三个文件夹zookeeper1,zookeeper2,zookeeper3....用于存放pid

mkdir /var/zookeeper/zookeeper1
mkdir /var/zookeeper/zookeeper2
mkdir /var/zookeeper/zookeeper3

 

分别在   zookeeper1,zookeeper2,zookeeper3 ,新建三个文件 myid

~ echo "1" > /var/zookeeper/zookeeper1/myid
~ echo "2" > /var/zookeeper/zookeeper2/myid
~ echo "3" > /var/zookeeper/zookeeper3/myid

  注意myid只能为数字,因为我试验了下,包含英文的话zk启动不起来,抛出异常

分别修改配置文件
修改:dataDir,clientPort
增加:集群的实例,server.X,”X”表示每个目录中的myid的值

 vi /usr/zookeeper/zookeeper1/conf/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.
# do not use /tmp for storage, /tmp here is just 
# example sakes.
dataDir=/var/zookeeper/zookeeper1
# the port at which the clients will connect
clientPort=2181
server.1=127.0.0.1:2888:3888
server.2=127.0.0.1:2889:3889
server.3=127.0.0.1:2890:3890
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the 
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1

 

 

以下只贴出不同部分,其他和zk1相同

 vi /usr/zookeeper/zookeeper2/conf/zoo.cfg

 

dataDir=/var/zookeeper/zookeeper2

 

clientPort=2182
 vi /user/zookeeper/zookeeper3/conf/zoo.cfg

  

dataDir=/var/zookeeper/zookeeper3

 

   clientPort=2182


启动每台机器
/usr/zookeeper/zookeeper1/bin/zkServer.sh start
/usr/zookeeper/zookeeper2/bin/zkServer.sh start
/usr/zookeeper/zookeeper3/bin/zkServer.sh start

  

查看启动状态

 

 

 

posted @ 2016-07-08 11:09  justin_xiaoshuai  阅读(278)  评论(0编辑  收藏  举报