标签：env select can 分布 file limit 功能 not leader
ZooKeeper是一个分布式的，开放源码的分布式应用程序协调服务，是Google的Chubby一个开源的实现，是Hadoop和Hbase的重要组件。它是一个为分布式应用提供一致性服务的软件，提供的功能包括：配置维护、域名服务、分布式同步、组服务等。由于ZooKeeper的开源特性，后来我们的开发者在分布式锁的基础上，摸索了出了其他的使用方法：配置维护、组服务、分布式消息队列、分布式通知/协调等。
ZooKeeper是可以集群复制的，通过Zab(Zookeeper Atomic Broadcast)协议保持数据一致性，协议主要包括两个阶段：leader selection和Atomic broadcast。集群中有一个leader，通过broadcast更新其余的follower。当leader崩溃或者失去多数follower，则leader会面临重选。
1. 进入到/usr目录，wget http://mirror.bit.edu.cn/apache/zookeeper/zookeeper-3.4.10/zookeeper-3.4.10.tar.gz
[root@Server1 Downloads]# cd /usr [root@Server1 usr]# ls bin etc games include lib lib64 libexec local sbin share src tmp [root@Server1 usr]# wget http://mirror.bit.edu.cn/apache/zookeeper/zookeeper-3.4.10/zookeeper-3.4.10.tar.gz --2017-05-24 23:37:12-- http://mirror.bit.edu.cn/apache/zookeeper/zookeeper-3.4.10/zookeeper-3.4.10.tar.gz Resolving mirror.bit.edu.cn (mirror.bit.edu.cn)... 202.204.80.77, 2001:da8:204:2001:250:56ff:fea1:22 Connecting to mirror.bit.edu.cn (mirror.bit.edu.cn)|202.204.80.77|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 35042811 (33M) [application/octet-stream] Saving to: ??òzookeeper-3.4.10.tar.gz??? 31% [====================> ] 11,160,899 494KB/s eta 42s
2.解压缩下载的文件，并重命名为zookeeper文件夹
[root@Server1 usr]# tar -xvf zookeeper-3.4.10.tar.gz [root@Server1 usr]# mv zookeeper-3.4.10 zookeeper
3.修改环境变量,vi /etc/profile，在文件尾部追加如下
export ZOOKEEPER_HOME=/usr/zookeeper
export PATH=$PATH:$ZOOKEEPER_HOME/bin
4.创建zookeeper配置文件
[root@Server1 zookeeper]# cd conf/ [root@Server1 conf]# ls configuration.xsl log4j.properties zoo_sample.cfg [root@Server1 conf]# cp zoo_sample.cfg zoo.cfg
5.配置zookeeper的数据目录和日志目录，把这两个目录存放在/tmp/zookeeper下面
[root@Server1 ~]# cd /tmp [root@Server1 tmp]# ls hogsuspend systemd-private-3ff79a0765994743931501169ad962cf-cups.service-uQcMzj systemd-private-3ff79a0765994743931501169ad962cf-vmtoolsd.service-aovBEQ [root@Server1 tmp]# mkdir zookeeper [root@Server1 tmp]# cd zookeeper/ [root@Server1 zookeeper]# mkdir log [root@Server1 zookeeper]# mkdir data [root@Server1 zookeeper]# ls data log
6.配置zoo.cfg文件如下
# 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=/tmp/zookeeper/data dataLogDir=/tmp/zookeeper/log # 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
7.启动zookeeper,进入到/usr/zookeeper/bin目录
[root@Server1 bin]# pwd /usr/zookeeper/bin [root@Server1 bin]# ls README.txt zkCleanup.sh zkCli.cmd zkCli.sh zkEnv.cmd zkEnv.sh zkServer.cmd zkServer.sh [root@Server1 bin]# ./zkServer.sh start ZooKeeper JMX enabled by default Using config: /usr/zookeeper/bin/../conf/zoo.cfg Starting zookeeper ... STARTED
标签：env select can 分布 file limit 功能 not leader
原文地址：http://www.cnblogs.com/qizhelongdeyang/p/6901560.html
