zookeeper源码安装

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··

    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··

cat ./conf/zoo.cfg

tickTime=2000                           单位毫秒，用来做两次心跳最低超时时间间··
initLimit=10                  集群中的follower服务··(F)与leader服务··(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··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··

启动服务

zookeeper默认会占··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