参考链接：http://zookeeper.apache.org/
https://www.cnblogs.com/lyhc/p/6560993.html
系统：
乌班图16.04
虚拟机（zk一般要求奇数台节点）：
192.168.0.15 ubuntu15
192.168.0.16 ubuntu16
192.168.0.17 ubuntu17
1、standalone安装：
1、下载：
wget http://apache.osuosl.org/zookeeper/zookeeper-3.4.10/zookeeper-3.4.10.tar.gz
2、解压：
tar -xzvf zookeeper-3.4.6.tar.gz -C /usr/local
3、复制配置文件：
cd conf
cp zoo_sample.cfg zoo.cfg
4、standalone无需配置zoo.cfg，集群注意这里需要配置
5、启动：
sh zkServer.sh start //启动
这里报错：
zkServer.sh: 81: /usr/local/zookeeper-3.4.10/bin/zkEnv.sh: Syntax error: "(" unexpected (expecting "fi")
根据https://blog.csdn.net/u011404265/article/details/72869920提供的解决方案已解决
[email protected]:~# cd /bin/
[email protected]:/bin# ls -l /bin/sh
lrwxrwxrwx 1 root root 4 Dec 23 22:30 /bin/sh -> dash(默认)
[email protected]:/bin# ln -sf bash /bin/sh
[email protected]:/bin# ls -l /bin/sh
lrwxrwxrwx 1 root root 4 Dec 23 22:37 /bin/sh -> bash查看
root@ubuntu:/usr/local/zookeeper-3.4.10/bin# ps -ef | grep 'zookeeper'
root 1215 1 0 23:39 pts/0 00:00:02 java -Dzookeeper.log.dir=. -Dzookeeper.root.logger=INFO,CONSOLE -cp /usr/local/zookeeper-3.4.10/bin/../build/classes:/usr/local/zookeeper-3.4.10/bin/../build/lib/*.jar:/usr/local/zookeeper-3.4.10/bin/../lib/slf4j-log4j12-1.6.1.jar:/usr/local/zookeeper-3.4.10/bin/../lib/slf4j-api-1.6.1.jar:/usr/local/zookeeper-3.4.10/bin/../lib/netty-3.10.5.Final.jar:/usr/local/zookeeper-3.4.10/bin/../lib/log4j-1.2.16.jar:/usr/local/zookeeper-3.4.10/bin/../lib/jline-0.9.94.jar:/usr/local/zookeeper-3.4.10/bin/../zookeeper-3.4.10.jar:/usr/local/zookeeper-3.4.10/bin/../src/java/lib/*.jar:/usr/local/zookeeper-3.4.10/bin/../conf: -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.local.only=false org.apache.zookeeper.server.quorum.QuorumPeerMain /usr/local/zookeeper-3.4.10/bin/../conf/zoo.cfg
root 1444 1177 0 23:53 pts/0 00:00:00 grep --color=auto zookeeper使用：
zkClient:
root@ubuntu:/usr/local/zookeeper-3.4.10/bin# ./zkCli.sh -timeout 5000 -server 192.168.0.17:2181
2、集群安装（3个节点）
因为leader是选举产生，算法原因一般配置奇数个节点
1、安装：分别在三台机器安装zk，博主直接装了一台然后克隆了三台虚拟机。
2、配置zoo.cfg:安装standalone版的时候复制了 conf/zoo.cfg 文件，但是没有进行配置，如果需要搭建集群，则需要对此文件进行配置！这里随便找一台（ubuntu15）对zoo.cfg进行配置：
vim zoo.cfg
dataDir=/usr/local/zk/data
dataLogDir=/usr/local/zk/logs
server.1=0.0.0.0:2881:3881
server.2=ubuntu16:2882:3882
server.3=ubuntu17:2883:3883
autopurge.snapRetainCount=33、根据配置的dataDir 和 dataLogDir 创建目录：
root@ubuntu15:/usr/local/zookeeper-3.4.10/bin# mkdir -p /usr/local/zk/data
root@ubuntu15:/usr/local/zookeeper-3.4.10/bin# mkdir -p /usr/local/zk/logs4、myid设置，因为这是集群中的第一台，这里给它id设置为1
root@ubuntu15:/usr/local/zk/data# touch /usr/local/zk/data/myid
root@ubuntu15:/usr/local/zk/data# echo > /usr/local/zk/data/myid5、这样第一台配置完成，我直接复制第一台的配置文件到其它两台，略作修改后，创建data目录修改节点id
scp -r [email protected]:/usr/local/zookeeper-3.4.10/conf/zoo.cfg ./
a、zoo.cfg 中本机ip需要设为0.0.0.0
b、第二台myid需要设置为2，第三台设置为3.。。。。
6、依次启动三个节点
ubuntu15
root@ubuntu15:/usr/local/zookeeper-3.4.10/bin# sh zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.10/bin/../conf/zoo.cfg
Starting zookeeper ... >>>>>>>>>>>>>>>>>>>>
STARTED
root@ubuntu15:/usr/local/zookeeper-3.4.10/bin# sh zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.10/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.
root@ubuntu15:/usr/local/zookeeper-3.4.10/bin# sh zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.10/bin/../conf/zoo.cfg
Mode: followerubuntu16
root@ubuntu16:/usr/local/zookeeper-3.4.10/bin# sh zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.10/bin/../conf/zoo.cfg
Starting zookeeper ... >>>>>>>>>>>>>>>>>>>>
STARTED
root@ubuntu16:/usr/local/zookeeper-3.4.10/bin# sh zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.10/bin/../conf/zoo.cfg
Mode: leaderubuntu17
root@ubuntu17:/usr/local/zookeeper-3.4.10/bin# sh zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.10/bin/../conf/zoo.cfg
Starting zookeeper ... >>>>>>>>>>>>>>>>>>>>
STARTED
root@ubuntu17:/usr/local/zookeeper-3.4.10/bin# sh zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.10/bin/../conf/zoo.cfg
Mode: follower