首先准备三个节点
192.168.1.127
192.168.1.128
192.168.1.129

先安装zookeeper
cd /usr/local/src/
wget http://apache.fayea.com/zookeeper/zookeeper-3.5.1-alpha/zookeeper-3.5.1-alpha.tar.gztar zxf zookeeper-3.5.1-alpha.tar.gz
mv zookeeper-3.5.1-alpha /usr/local/zookeeper

更改三个节点配置
server.1=192.168.1.127:2008:6008
server.服务器编号=服务器地址:LF通信端口:选举端口

cd /usr/local/zookeeper && mkdir -p /data/zookeeper
vim conf/zoo.cfg

    tickTime=2000
    initLimit=10
    syncLimit=5
    dataDir=/data/zookeeper
    clientPort=2181
    server.1=192.168.1.127:2008:6008
    server.2=192.168.1.128:2008:6008
    server.3=192.168.1.129:2008:6008

启动前两个节点

     ./bin/zkServer.sh start
    ZooKeeper JMX enabled by default
    /usr/bin/java
    Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
    Starting zookeeper ... STARTED

你会发现有报错是因为其他节点没有起来

    2016-05-14 12:05:18,540 [myid:3] - WARN  [QuorumPeer[myid=3](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):QuorumCnxManager@459] - Cannot open channel to 2 at election address /192.168.199.22
    2:6008
    java.net.ConnectException: Connection refused
            at java.net.PlainSocketImpl.socketConnect(Native Method)
            at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
            at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
            at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
            at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
            at java.net.Socket.connect(Socket.java:589)
            at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:444)
            at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:485)
            at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:513)
            at org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
            at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1040)

查看集群状态

echo 'stat'|nc 192.168.1.128 2181

Zookeeper version: 3.5.1-alpha-1693007, built on 07/28/2015 07:19 GMT
Clients:
/192.168.1.128:182810

Latency min/avg/max: 0/0/0
Received: 1

Sent: 0
Connections: 1
Outstanding: 0
Zxid: 0x100000000
Mode: follower
Node count: 5

查看节点角色[root@test-node4 zookeeper]# ./bin/zkServer.sh status
ZooKeeper JMX enabled by default
/usr/bin/java
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: leader
zookeeper

zookeeper源码安装

00-zookeeper启动报错: myid file is missing 和 Problem starting AdminServer

02-zookeeper集群搭建

介绍

zookeeper是一个管理分布式服务协调的开源服务，它本身亦是分布式服务。
是hadoop，Hbase,codis服务的重要组件，为分布式应用提供一致性服务：配置维护，域名服务，分布式同步，组服务等。

下载安装包

    yum -y install openjdk
     wget http://apache.fayea.com/zookeeper/zookeeper-3.5.1-alpha/zookeeper-3.5.1-alpha.tar.gz
    tar zxf zookeeper-3.5.1-alpha.tar.gz 
    cd zookeeper-3.5.1-alpha

配置文件

这里先使用默认设置

cat ./conf/zoo.cfg

tickTime=2000                           单位毫秒，用来做两次心跳最低超时时间间隔
initLimit=10                  集群中的follower服务器(F)与leader服务器(L)之间初始连接时能容忍的最多心跳数（tickTime的数量）。
syncLimit=5                              F节点和L节点最多心跳失败5次。
dataDir=/data/zookeeper       内存数据快照到本地的数据，除非特别说明，否则将是更新事物日志。
clientPort=2181                        客户端端口

启动服务

zookeeper默认会占用2181，8080，55144三个端口

    [root@salt-master zookeeper-3.5.1-alpha]# ./bin/zkServer.sh 
    ZooKeeper JMX enabled by default
    Using config: /usr/local/src/zookeeper-3.5.1-alpha/bin/../conf/zoo.cfg
    Usage: ./bin/zkServer.sh [--config <conf-dir>] {start|start-foreground|stop|restart|status|print-cmd}

    [root@salt-master zookeeper-3.5.1-alpha]# ./bin/zkServer.sh start
    ZooKeeper JMX enabled by default
    Using config: /usr/local/src/zookeeper-3.5.1-alpha/bin/../conf/zoo.cfg
    Starting zookeeper ... STARTED

连接测试

 ./bin/zkCli.sh -server 192.168.1.115:2181
Connecting to 192.168.1.115:2181
WATCHER::
WatchedEvent state:SyncConnected type:None path:null
[zk: 192.168.1.115:2181(CONNECTED) 1] ls /
[zookeeper]
[zk: 192.168.1.115:2181(CONNECTED) 4] ls2 /zookeeper
'ls2' has been deprecated. Please use 'ls [-s] path' instead.
[config, quota]
cZxid = 0x0
ctime = Thu Jan 01 08:00:00 CST 1970
mZxid = 0x0
mtime = Thu Jan 01 08:00:00 CST 1970
pZxid = 0x0
cversion = -2
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 2

查看zookeeper服务信息

    [root@salt-master codis]# echo stat | nc 192.168.1.115 2181 
    Zookeeper version: 3.5.1-alpha-1693007, built on 07/28/2015 07:19 GMT
    Clients:
     /192.168.1.115:56637[0](queued=0,recved=1,sent=0)
     /192.168.1.115:56608[1](queued=0,recved=160,sent=160)

    Latency min/avg/max: 0/0/22
    Received: 162
    Sent: 161
    Connections: 2
    Outstanding: 0
    Zxid: 0x1
    Mode: standalone
    Node count: 5