SolrCloud之搭建Zookeeper集群
一.搭建Zookeeper集群1.下载地址
http://zookeeper.apache.org/releases.html#download
2.解压缩，tar -xvzf zookeeper-3.4.6.tar.gz
复制出3个节点
# cp -r /usr/zht/zookeeper-3.4.6 zookeeper-1
# cp -r /usr/zht/zookeeper-3.4.6 zookeeper-2
# cp -r /usr/zht/zookeeper-3.4.6 zookeeper-3
（本文是在一台机器测试，实际上肯定是要分在几台服务器上部署的，否则没有意义）
3.分别修改配置文件
# cd zookeeper-1/ conf/
# cp zoo_sample.cfg zoo.cfg
修改zoo.cfg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.
dataDir=/usr/local/data/zookeeper/zookeeper-1
dataLogDir=/usr/local/data/zookeeper/logs-1
# the port at which the clients will connect
clientPort=1181
server.1=127.0.0.1:2888:3888
server.2=127.0.0.1:4888:5888
server.3=127.0.0.1:6888:7888
标红部分为需要修改内容，clientPort在多服务器时不必修改
4.给节点分配ID
进入上文配置的dataDir=/usr/local/data/zookeeper/zookeeper-1，新建文件：myid，内容为该节点ID
如：/usr/local/data/zookeeper/zookeeper-1 目录下myid内容为1
5.启动各节点
# ./zkServer.sh start
JMX enabled by default
Using config: /usr/local/zookeeper/zookeeper-1/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
# ./zkServer.sh status
JMX enabled by default
Using config: /usr/local/zookeeper/zookeeper-1/bin/../conf/zoo.cfg
Mode: follower
./zkServer.sh start | stop | status (start:启动 stop:关闭 status:查看状态，如谁是leader)
通过 ./zkCli.sh -server host:port 可以进入zookeeper的控制台。比如使用 ：
# ./zkCli.sh -server 127.0.0.1:1181
就可以登录zookeeper-1控制台
6.常用命令
ls /等命令可以查看zookeeper上面的文件。
例如： ls /live_nodes 查看各节点存活情况
rmr 可以删除文件
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