今天闲来无事，重新安装zookeeper 环境。由于个人有几台虚拟主机。总共四台服务器。
其中选择三台做zookeeper集群。具体ip如下：
| IP地址 | 主机名称 |
| 100.xx.xx.31 | master |
| 100.xx.xx.72 | slave1 |
| 100.xx.xx.122 | slave2 |
如合配置主机名，可以修改linux hosts文件。具体文件路径： /var/hosts,内容如下：
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 100.xx.xx.31 xxxx-xxxx 100.xx.xx.31 master 100.xx.xx.72 slave1 100.xx.xx.122 slave2 ~修改完上述配置过后，下载zookeeper, 我下载的版本：zookeeper-3.4.9
下载完成，直接解压，zookeeper 目录结构：
drwxr-xr-x 10 1001 1001 4096 Aug 23 15:42 .
drwxr-xr-x 6 root root 4096 Dec 4 12:20 .. drwxr-xr-x 2 1001 1001 4096 Dec 4 02:07 bin -rw-rw-r-- 1 1001 1001 83539 Aug 23 15:39 build.xml -rw-rw-r-- 1 1001 1001 90824 Aug 23 15:39 CHANGES.txt drwxr-xr-x 2 1001 1001 4096 Dec 4 02:04 conf drwxr-xr-x 10 1001 1001 4096 Aug 23 15:39 contrib drwxr-xr-x 2 1001 1001 4096 Aug 23 15:44 dist-maven drwxr-xr-x 6 1001 1001 4096 Aug 23 15:40 docs -rw-rw-r-- 1 1001 1001 1953 Aug 23 15:39 ivysettings.xml -rw-rw-r-- 1 1001 1001 3499 Aug 23 15:39 ivy.xml drwxr-xr-x 4 1001 1001 4096 Aug 23 15:40 lib -rw-rw-r-- 1 1001 1001 11938 Aug 23 15:39 LICENSE.txt -rw-rw-r-- 1 1001 1001 171 Aug 23 15:39 NOTICE.txt -rw-rw-r-- 1 1001 1001 1770 Aug 23 15:39 README_packaging.txt -rw-rw-r-- 1 1001 1001 1585 Aug 23 15:39 README.txt drwxr-xr-x 5 1001 1001 4096 Aug 23 15:39 recipes drwxr-xr-x 8 1001 1001 4096 Aug 23 15:40 src -rw-rw-r-- 1 1001 1001 1368238 Aug 23 15:39 zookeeper-3.4.9.jar -rw-rw-r-- 1 1001 1001 819 Aug 23 15:42 zookeeper-3.4.9.jar.asc -rw-rw-r-- 1 1001 1001 33 Aug 23 15:39 zookeeper-3.4.9.jar.md5 -rw-rw-r-- 1 1001 1001 41 Aug 23 15:39 zookeeper-3.4.9.jar.sha1找到conf 目录
cp zoo_sample.cfg zoo.cfg
修改zoo.cfg 文件：
# 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/work/data/zookeeper # the port at which the clients will connectclientPort=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=1server.1=master:2888:3888 server.2=slave1:2888:3888 server.3=slave2:2888:3888 ~根据需要调整你要修改标好的配置。
需要说明下zookeeper 几个端口的意思：
zookeeper监听三个端口: 2181用来监听zookeeper客户端连接, 2888, 如果是领导者, 用来监听跟随者连接, 3888用来在选举领导者阶段, 用来监听其他服务器的连接。
配置文件修改完成后，需要创建myid 文件，myid 文件存在data目录下，本次安装data目录：/var/work/data/zookeeper
根据zoo.cfg 配置，分别在不同server 上myid写入：1，2，3 。
ok， 基本搞定，接下来启动zookeeper .
[root bin]# ./zkServer.sh start
停用zookeeper
[root bin]# ./zkServer.sh stoo
大功告成，下次我们再分享zookeeper 详细配置。