ZooKeeper动态添加或删除节点

@Author  : Spinach | GHB
@Link    : http://blog.youkuaiyun.com/bocai8058

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配置需求

序号	目前配置	myid	需求配置	myid
01	server.1=10.1.3.6:2881:3881	1	server.1=10.1.3.6:2881:3881	1
02	server.2=10.1.3.7:2881:3881	2	server.2=10.1.3.7:2881:3881	2
03	server.3=10.1.3.8:2881:3881	3	server.3=10.1.3.8:2881:3881	3
04			server.4=10.1.3.9:2881:3881	4
05			server.5=10.1.3.10:2881:3881	5

注：server . A = B : C : D【A为第A号服务器；B为客户端端口；C为与leader交换信息端口；D：选举端口】

配置文件有zoo.cfg和myid，如下为server . 1 = 10.1.3.6 : 2881 : 3881 的配置：

######### 路径为./cfg/zoo.cfg ######### 内容如下

# 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/ghb/HadoopCluster/zookeeper001/data
dataLogDir=/home/ghb/HadoopCluster/zookeeper001/logs
# the port at which the clients will connect
clientPort=2181
# 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
server.1=10.1.3.6:2881:3881
server.2=10.1.3.7:2881:3881
server.3=10.1.3.8:2881:3881

######### 路径为./data/myid #########  内容如下

1

动态添加节点

1. 在10.1.3.9和10.1.3.10上解压zookeeper后，进入cfg中；
2. mv zoo_sample.cfg zoo.cfg
3. 在zoo.cfg中添加如下：

# 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/ghb/HadoopCluster/zookeeper004/data
dataLogDir=/home/ghb/HadoopCluster/zookeeper004/logs
# the port at which the clients will connect
clientPort=2181
# 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
server.1=10.1.3.6:2881:3881
server.2=10.1.3.7:2881:3881
server.3=10.1.3.8:2881:3881
server.4=10.1.3.9:2881:3881
server.5=10.1.3.10:2881:3881

4. 建立/home/ghb/HadoopCluster/zookeeper004/data文件夹，并在里面创建myid文件，并添加内容如下：

4

5. 在10.1.3.10上操作类似，修改完后，再回到10.1.3.6，10.1.3.7，10.1.3.8上将zoo.cfg中的内容替换成如下：

server.1=10.1.3.6:2881:3881
server.2=10.1.3.7:2881:3881
server.3=10.1.3.8:2881:3881
# 将上面修改成下面，保持配置相同
server.1=10.1.3.6:2881:3881
server.2=10.1.3.7:2881:3881
server.3=10.1.3.8:2881:3881
server.4=10.1.3.9:2881:3881
server.5=10.1.3.10:2881:3881

动态删除节点

其操作与动态添加节点操作相反，将配置相应移除即可。

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