其中zoo.cfg 的连接数如下：
maxClientCnxns=1000

具体就不在每个配置文件中写了
如果使用，请加上这个配置

 1 [root@zhang tools]# pwd
 2 /root/tools
 3 [root@zhang tools]# tar xf jdk-8u162-linux-x64.tar.gz 
 4 [root@zhang tools]# ll
 5 total 201392
 6 drwxr-xr-x 8   10  143      4096 Dec 20 13:27 jdk1.8.0_162
 7 -rw-r--r-- 1 root root 189815615 Mar 12 16:47 jdk-8u162-linux-x64.tar.gz
 8 -rw-r--r-- 1 root root  16402010 May 14 00:26 zookeeper-3.4.5.tar.gz
 9 [root@zhang tools]# mv jdk1.8.0_162/ /app/
10 [root@zhang tools]# cd /app/
11 [root@zhang app]# ll
12 total 8
13 drwxr-xr-x  8   10   143 4096 Dec 20 13:27 jdk1.8.0_162
14 [root@zhang app]# ln -s jdk1.8.0_162/ jdk
15 [root@zhang app]# ll
16 total 8
17 lrwxrwxrwx  1 root root    13 May 16 23:19 jdk -> jdk1.8.0_162/
18 drwxr-xr-x  8   10   143 4096 Dec 20 13:27 jdk1.8.0_162

 1 [yun@iZ2zefjy4361ppunik5222Z ~]$ pwd
 2 /app
 3 [yun@iZ2zefjy4361ppunik5222Z ~]$ ll -d jdk*  # 可以根据实际情况选择jdk版本，其中jdk1.8 可以兼容 jdk1.7   
 4 lrwxrwxrwx 1 yun yun   11 Mar 15 14:58 jdk -> jdk1.7.0_71
 5 drwxr-xr-x 8 yun yun 4096 Sep 27  2014 jdk1.7.0_71
 6 drwxr-xr-x 8 yun yun 4096 Dec 20 13:27 jdk1.8.0_162
 7 [yun@iZ2zefjy4361ppunik5222Z profile.d]$ pwd
 8 /etc/profile.d
 9 [yun@iZ2zefjy4361ppunik5222Z profile.d]$ cat jdk.sh # java环境变量   
10 export JAVA_HOME=/app/jdk
11 export JRE_HOME=/app/jdk/jre
12 export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib:$CLASSPATH
13 export PATH=$JAVA_HOME/bin:$PATH

 1 # 路径
 2 [root@zhang app]# pwd
 3 /app
 4 [root@zhang app]# ll
 5 total 4
 6 lrwxrwxrwx  1 root root    13 May 26 06:55 jdk -> jdk1.8.0_112/
 7 drwxr-xr-x  8   10   143  255 Sep 23  2016 jdk1.8.0_112
 8 drwxr-xr-x 10  501 games 4096 Nov  5  2012 zookeeper-3.4.5
 9 
10 # 配置文件
11 [root@zhang conf]# pwd
12 /app/zookeeper-3.4.5/conf
13 [root@zhang conf]# cp -a zoo_sample.cfg zoo.cfg
14 [root@zhang conf]# vim zoo.cfg 
15 # The number of milliseconds of each tick #心跳间隔时间，zookeeper中使用的基本时间单位，毫秒值。每隔2秒发送一个心跳
16 tickTime=2000
17 # The number of ticks that the initial 
18 # synchronization phase can take
19 initLimit=10
20 # The number of ticks that can pass between 
21 # sending a request and getting an acknowledgement
22 syncLimit=5
23 # the directory where the snapshot is stored.
24 # do not use /tmp for storage, /tmp here is just 
25 # example sakes.  数据目录 单独目录存放
26 dataDir=/app/bigdata/zookeeper/data
27 # the port at which the clients will connect
28 clientPort=2181
29 #
30 # Be sure to read the maintenance section of the 
31 # administrator guide before turning on autopurge.
32 #
33 # http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
34 #
35 # The number of snapshots to retain in dataDir
36 #autopurge.snapRetainCount=3
37 # Purge task interval in hours
38 # Set to "0" to disable auto purge feature
39 #autopurge.purgeInterval=1

 1 # 启动服务
 2 [root@zhang bin]# pwd
 3 /app/zookeeper-3.4.5/bin
 4 [root@zhang bin]# ./zkServer.sh start
 5 JMX enabled by default
 6 Using config: /app/zookeeper-3.4.5/bin/../conf/zoo.cfg
 7 Starting zookeeper ... STARTED
 8 [root@zhang bin]# 
 9 [root@zhang bin]# ./zkServer.sh status
10 JMX enabled by default
11 Using config: /app/zookeeper-3.4.5/bin/../conf/zoo.cfg
12 Mode: standalone
13 
14 # 停止服务
15 [root@zhang bin]# ./zkServer.sh stop
16 JMX enabled by default
17 Using config: /app/zookeeper-3.4.5/bin/../conf/zoo.cfg
18 Stopping zookeeper ... STOPPED
19 [root@zhang bin]# ./zkServer.sh status
20 JMX enabled by default
21 Using config: /app/zookeeper-3.4.5/bin/../conf/zoo.cfg
22 Error contacting service. It is probably not running.

 1 [root@zhang app]# pwd
 2 /app
 3 [root@zhang app]# ll
 4 total 16
 5 drwxr-xr-x  3 root root    23 May 26 07:01 bigdata
 6 lrwxrwxrwx  1 root root    13 May 26 06:55 jdk -> jdk1.8.0_112/
 7 drwxr-xr-x  8   10   143  255 Sep 23  2016 jdk1.8.0_112
 8 drwxr-xr-x 11  501 games 4096 May 26 07:04 zookeeper-3.4.5_01
 9 drwxr-xr-x 11  501 games 4096 May 26 07:04 zookeeper-3.4.5_02
10 drwxr-xr-x 11  501 games 4096 May 26 07:04 zookeeper-3.4.5_03

 1 [root@zhang conf]# pwd
 2 /app/zookeeper-3.4.5_01/conf 
 3 [root@zhang conf]# ll
 4 total 20
 5 -rw-r--r-- 1 501 games  535 Oct  1  2012 configuration.xsl
 6 -rw-r--r-- 1 501 games 2161 Oct  1  2012 log4j.properties
 7 -rw-r--r-- 1 501 games  927 May 26 07:06 zoo.cfg
 8 -rw-r--r-- 1 501 games  808 Oct  1  2012 zoo_sample.cfg
 9 [root@zhang conf]# vim zoo.cfg  
10 # The number of milliseconds of each tick
11 tickTime=2000
12 # The number of ticks that the initial 
13 # synchronization phase can take
14 initLimit=10
15 # The number of ticks that can pass between 
16 # sending a request and getting an acknowledgement
17 syncLimit=5
18 # the directory where the snapshot is stored.
19 # do not use /tmp for storage, /tmp here is just 
20 # example sakes.  数据目录 单独目录存放  确保该目录存在
21 dataDir=/app/bigdata/zookeeper1/data
22 # the port at which the clients will connect
23 # 客户端端口  多个实例的端口配置不可重复
24 clientPort=2181
25 #
26 # Be sure to read the maintenance section of the 
27 # administrator guide before turning on autopurge.
28 #
29 # http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
30 #
31 # The number of snapshots to retain in dataDir
32 #autopurge.snapRetainCount=3
33 # Purge task interval in hours
34 # Set to "0" to disable auto purge feature
35 #autopurge.purgeInterval=1
36 
37 #server.NUM=IP:port1:port2  NUM表示本机为第几号服务器；IP为本机ip地址；
38 #port1为leader与follower通信端口；port2为参与竞选leader的通信端口
39 #多个实例的端口配置不能重复，如下：
40 server.1=172.16.1.14:2222:2225
41 server.2=172.16.1.14:3333:3335
42 server.3=172.16.1.14:4444:4445

 1 [root@zhang conf]# pwd
 2 /app/zookeeper-3.4.5_02/conf
 3 [root@zhang conf]# ll
 4 total 16
 5 -rw-r--r-- 1 501 games  535 Oct  1  2012 configuration.xsl
 6 -rw-r--r-- 1 501 games 2161 Oct  1  2012 log4j.properties
 7 -rw-r--r-- 1 501 games 1269 May 26 10:43 zoo.cfg
 8 -rw-r--r-- 1 501 games  808 Oct  1  2012 zoo_sample.cfg
 9 [root@zhang conf]# vim zoo.cfg  
10 # The number of milliseconds of each tick
11 tickTime=2000
12 # The number of ticks that the initial 
13 # synchronization phase can take
14 initLimit=10
15 # The number of ticks that can pass between 
16 # sending a request and getting an acknowledgement
17 syncLimit=5
18 # the directory where the snapshot is stored.
19 # do not use /tmp for storage, /tmp here is just 
20 # example sakes.  数据目录 单独目录存放  确保该目录存在
21 dataDir=/app/bigdata/zookeeper2/data
22 # the port at which the clients will connect
23 # 客户端端口  多个实例的端口配置不可重复
24 clientPort=2182
25 #
26 # Be sure to read the maintenance section of the 
27 # administrator guide before turning on autopurge.
28 #
29 # http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
30 #
31 # The number of snapshots to retain in dataDir
32 #autopurge.snapRetainCount=3
33 # Purge task interval in hours
34 # Set to "0" to disable auto purge feature
35 #autopurge.purgeInterval=1
36 
37 #server.NUM=IP:port1:port2  NUM表示本机为第几号服务器；IP为本机ip地址；
38 #port1为leader与follower通信端口；port2为参与竞选leader的通信端口
39 #多个实例的端口配置不能重复，如下：
40 server.1=172.16.1.14:2222:2225
41 server.2=172.16.1.14:3333:3335
42 server.3=172.16.1.14:4444:4445

 1 [root@zhang conf]# pwd
 2 /app/zookeeper-3.4.5_03/conf
 3 [root@zhang conf]# ll
 4 total 16
 5 -rw-r--r-- 1 501 games  535 Oct  1  2012 configuration.xsl
 6 -rw-r--r-- 1 501 games 2161 Oct  1  2012 log4j.properties
 7 -rw-r--r-- 1 501 games 1268 May 25 23:39 zoo.cfg
 8 -rw-r--r-- 1 501 games  808 Oct  1  2012 zoo_sample.cfg
 9 [root@zhang conf]# vim zoo.cfg  
10 # The number of milliseconds of each tick
11 tickTime=2000
12 # The number of ticks that the initial 
13 # synchronization phase can take
14 initLimit=10
15 # The number of ticks that can pass between 
16 # sending a request and getting an acknowledgement
17 syncLimit=5
18 # the directory where the snapshot is stored.
19 # do not use /tmp for storage, /tmp here is just 
20 # example sakes.  数据目录 单独目录存放
21 dataDir=/app/bigdata/zookeeper3/data
22 # the port at which the clients will connect
23 # 客户端端口  多个实例的端口配置不可重复
24 clientPort=2183
25 #
26 # Be sure to read the maintenance section of the 
27 # administrator guide before turning on autopurge.
28 #
29 # http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
30 #
31 # The number of snapshots to retain in dataDir
32 #autopurge.snapRetainCount=3
33 # Purge task interval in hours
34 # Set to "0" to disable auto purge feature
35 #autopurge.purgeInterval=1
36 
37 #server.NUM=IP:port1:port2  NUM表示本机为第几号服务器；IP为本机ip地址；
38 #port1为leader与follower通信端口；port2为参与竞选leader的通信端口
39 #多个实例的端口配置不能重复，如下：
40 server.1=172.16.1.14:2222:2225
41 server.2=172.16.1.14:3333:3335
42 server.3=172.16.1.14:4444:4445

1 [root@zhang bigdata]# cat /app/bigdata/zookeeper1/data/myid 
2 1
3 [root@zhang bigdata]# cat /app/bigdata/zookeeper2/data/myid 
4 2
5 [root@zhang bigdata]# cat /app/bigdata/zookeeper3/data/myid 
6 3

 1 # 第一台
 2 [root@zhang bin]# pwd
 3 /app/zookeeper-3.4.5_01/bin
 4 [root@zhang bin]# ./zkServer.sh start
 5 JMX enabled by default
 6 Using config: /app/zookeeper-3.4.5_01/bin/../conf/zoo.cfg
 7 Starting zookeeper ... STARTED
 8 
 9 # 第二台
10 [root@zhang bin]# pwd
11 /app/zookeeper-3.4.5_02/bin
12 [root@zhang bin]# ./zkServer.sh start
13 JMX enabled by default
14 Using config: /app/zookeeper-3.4.5_02/bin/../conf/zoo.cfg
15 Starting zookeeper ... STARTED
16 
17 # 第三台
18 [root@zhang bin]# pwd
19 /app/zookeeper-3.4.5_03/bin
20 [root@zhang bin]# ./zkServer.sh start
21 JMX enabled by default
22 Using config: /app/zookeeper-3.4.5_03/bin/../conf/zoo.cfg
23 Starting zookeeper ... STARTED

 1 # 第一台
 2 [root@zhang bin]# pwd
 3 /app/zookeeper-3.4.5_01/bin
 4 [root@zhang bin]# ./zkServer.sh status
 5 JMX enabled by default
 6 Using config: /app/zookeeper-3.4.5_01/bin/../conf/zoo.cfg
 7 Mode: follower
 8 
 9 # 第二台
10 [root@zhang bin]# pwd
11 /app/zookeeper-3.4.5_02/bin
12 [root@zhang bin]# ./zkServer.sh status
13 JMX enabled by default
14 Using config: /app/zookeeper-3.4.5_02/bin/../conf/zoo.cfg
15 Mode: leader
16 
17 # 第三台
18 [root@zhang bin]# pwd
19 /app/zookeeper-3.4.5_03/bin
20 [root@zhang bin]# ./zkServer.sh status
21 JMX enabled by default
22 Using config: /app/zookeeper-3.4.5_03/bin/../conf/zoo.cfg
23 Mode: follower

 1 [root@docker01 conf]# pwd
 2 /app/zookeeper-3.4.5/conf
 3 [root@docker01 conf]# vim zoo.cfg 
 4 # The number of milliseconds of each tick
 5 tickTime=2000
 6 # The number of ticks that the initial 
 7 # synchronization phase can take
 8 initLimit=10
 9 # The number of ticks that can pass between 
10 # sending a request and getting an acknowledgement
11 syncLimit=5
12 # the directory where the snapshot is stored.
13 # do not use /tmp for storage, /tmp here is just 
14 # example sakes.
15 dataDir=/app/bigdata/zookeeper/data
16 # the port at which the clients will connect
17 clientPort=2181
18 #
19 # Be sure to read the maintenance section of the 
20 # administrator guide before turning on autopurge.
21 #
22 # http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
23 #
24 # The number of snapshots to retain in dataDir
25 #autopurge.snapRetainCount=3
26 # Purge task interval in hours
27 # Set to "0" to disable auto purge feature
28 #autopurge.purgeInterval=1
29 
30 # leader和follow通信端口和投票选举端口  
31 server.1=172.16.1.11:2888:3888 
32 server.2=172.16.1.12:2888:3888
33 server.3=172.16.1.13:2888:3888

1 [root@docker01 conf]# cd /app/bigdata/zookeeper/data   #   
2 [root@docker01 data]# vim myid  # 3台机器的myid分别为 1、2、3  # 见开头的主机规划 
3 1

 1 ##### 第1台、2台、3台 依次启动
 2 [root@docker01 bin]# pwd
 3 /app/zookeeper-3.4.5/bin
 4 [root@docker01 bin]# ll
 5 total 60
 6 -rwxr-xr-x 1  501 games   238 Oct  1  2012 README.txt
 7 -rwxr-xr-x 1  501 games  1909 Oct  1  2012 zkCleanup.sh
 8 -rwxr-xr-x 1  501 games  1049 Oct  1  2012 zkCli.cmd
 9 -rwxr-xr-x 1  501 games  1512 Oct  1  2012 zkCli.sh
10 -rwxr-xr-x 1  501 games  1333 Oct  1  2012 zkEnv.cmd
11 -rwxr-xr-x 1  501 games  2599 Oct  1  2012 zkEnv.sh
12 -rwxr-xr-x 1  501 games  1084 Oct  1  2012 zkServer.cmd
13 -rwxr-xr-x 1  501 games  5467 Oct  1  2012 zkServer.sh
14 [root@docker01 bin]# ./zkServer.sh start  
15 JMX enabled by default
16 Using config: /app/zookeeper-3.4.5/bin/../conf/zoo.cfg
17 Starting zookeeper ... STARTED

 1 # 第一台
 2 [root@docker01 bin]# ./zkServer.sh status  
 3 JMX enabled by default
 4 Using config: /app/zookeeper-3.4.5/bin/../conf/zoo.cfg
 5 Mode: follower
 6 
 7 # 第二台
 8 [root@docker02 bin]# ./zkServer.sh status  
 9 JMX enabled by default
10 Using config: /app/zookeeper-3.4.5/bin/../conf/zoo.cfg
11 Mode: leader
12 
13 # 第三台
14 [root@docker03 bin]# ./zkServer.sh status  
15 JMX enabled by default
16 Using config: /app/zookeeper-3.4.5/bin/../conf/zoo.cfg
17 Mode: follower