zookeeper集群搭建 docker+zk集群搭建-白红宇

zookeeper集群搭建 docker+zk集群搭建

阅读量：6101 次

发布时间：2019-06-20

本文共 21368 字，大约阅读时间需要 71 分钟。

环境:

192.168.1.5	zk1
192.168.1.6	zk2
192.168.1.7	zk3

概念不再阐述，直接上步骤，文章结尾处，会有些常用的zookeeper调优参数

一、准备环境

①拷贝环境

[root@kuting1 ~]# cat /etc/hosts

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4::1         localhost localhost.localdomain localhost6 localhost6.localdomain6192.168.1.5 zk1192.168.1.6 zk2192.168.1.7 zk3

[root@kuting1 ~]# ssh-keygen -t rsa

[root@kuting1 ~]# for i in tail -3 /etc/hosts | awk '{print $2}' ; do ssh-copy-id $i ; done

[root@kuting1 ~]# for i in tail -3 /etc/hosts | awk '{print $2}' ; do scp /etc/hosts $i:/etc/hosts ; done

②下载zookeeper安装包

[root@kuting1 ~]# wget https://archive.apache.org/dist/zookeeper/zookeeper-3.4.11/zookeeper-3.4.11.tar.gz

本次搭建实验使用的zk 3.4.11版本

[root@kuting1 ~]# tar zxf zookeeper-3.4.11.tar.gz

[root@kuting1 ~]# mkdir /data/server -p #程序目录

[root@kuting1 ~]# mkdir /data/data/zookeeper/0{0..2} -p #数据目录

[root@kuting1 ~]# mkdir /data/logs/zookeeper/0{0..2} -p #日志目录

③zookeeper环境必须有java环境以及默认的命令路径，部署过程此次省略

二、搭建单机伪分布式zookeeper集群

环境：

①配置zookeeper00

[root@kuting1 ~]# mv zookeeper-3.4.11 /data/server/zookeeper00

[root@kuting1 ~]# cd /data/server/zookeeper00/conf/

[root@kuting1 conf]# cp zoo_sample.cfg zoo.cfg

[root@kuting1 conf]# vim zoo.cfg

# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial # synchronization phase can takeinitLimit=10# The number of ticks that can pass between # sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.# do not use /tmp for storage, /tmp here is just # example sakes.dataDir=/data/data/zookeeper/00dataLogDir=/data/logs/zookeeper/00# 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 featureautopurge.purgeInterval=48server.1=192.168.1.5:2888:3888server.2=192.168.1.5:2889:3889server.3=192.168.1.5:2890:3890

[root@kuting1 ~]# echo 1 > /data/data/zookeeper/00/myid

②配置zookeeper01

[root@kuting1 ~]# cp -rf /data/server/zookeeper/00 /data/server/zookeeper/01

[root@kuting1 ~]# vim /data/server/zookeeper/01/conf/zoo.cfg

# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial # synchronization phase can takeinitLimit=10# The number of ticks that can pass between # sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.# do not use /tmp for storage, /tmp here is just # example sakes.dataDir=/data/data/zookeeper/01     #目录名字dataLogDir=/data/logs/zookeeper/01# the port at which the clients will connectclientPort=2182     #端口号必须要修改# 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 featureautopurge.purgeInterval=48server.1=192.168.1.5:2888:3888server.2=192.168.1.5:2889:3889server.3=192.168.1.5:2890:3890

[root@kuting1 ~]# echo 2 > /data/data/zookeeper/01/myid

③配置zookeeper02

[root@kuting1 ~]# cp -rf /data/server/zookeeper/00 /data/server/zookeeper/02

[root@kuting1 ~]# vim /data/server/zookeeper/02/conf/zoo.cfg

# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial # synchronization phase can takeinitLimit=10# The number of ticks that can pass between # sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.# do not use /tmp for storage, /tmp here is just # example sakes.dataDir=/data/data/zookeeper/02dataLogDir=/data/logs/zookeeper/02# the port at which the clients will connectclientPort=2183# 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 featureautopurge.purgeInterval=48server.1=192.168.1.5:2888:3888server.2=192.168.1.5:2889:3889server.3=192.168.1.5:2890:3890

[root@kuting1 ~]# echo 3 > /data/data/zookeeper/02/myid

④测试运作

启动第一个节点

[root@kuting1 ~]# cd /data/server/zookeeper00/bin

[root@kuting1 bin]# ./zkServer.sh start

ZooKeeper JMX enabled by defaultUsing config: /data/server/zookeeper00/bin/../conf/zoo.cfgStarting zookeeper ... STARTED

[root@kuting1 bin]# ss -anpt | grep java

LISTEN     0      50          :::2181                    :::*                   users:(("java",pid=13285,fd=25))LISTEN     0      50          :::46475                   :::*                   users:(("java",pid=13285,fd=19))LISTEN     0      50      ::ffff:192.168.1.5:3888                    :::*                   users:(("java",pid=13285,fd=26))

启动第二个节点

[root@kuting1 bin]# ../../zookeeper01/bin/zkServer.sh start

启动第三个节点

[root@kuting1 bin]# ../../zookeeper02/bin/zkServer.sh start

[root@kuting1 bin]# ss -anpt | grep java

LISTEN     0      50          :::37985                   :::*                   users:(("java",pid=14163,fd=19))LISTEN     0      50          :::2181                    :::*                   users:(("java",pid=13285,fd=25))LISTEN     0      50          :::2182                    :::*                   users:(("java",pid=14163,fd=25))LISTEN     0      50          :::2183                    :::*                   users:(("java",pid=14207,fd=25))LISTEN     0      50      ::ffff:192.168.1.5:2889                    :::*                   users:(("java",pid=14163,fd=28))LISTEN     0      50          :::46475                   :::*                   users:(("java",pid=13285,fd=19))LISTEN     0      50      ::ffff:192.168.1.5:3888                    :::*                   users:(("java",pid=13285,fd=26))LISTEN     0      50      ::ffff:192.168.1.5:3889                    :::*                   users:(("java",pid=14163,fd=26))LISTEN     0      50      ::ffff:192.168.1.5:3890                    :::*                   users:(("java",pid=14207,fd=26))LISTEN     0      50          :::42517                   :::*                   users:(("java",pid=14207,fd=19))ESTAB      0      0       ::ffff:192.168.1.5:41592               ::ffff:192.168.1.5:3888                users:(("java",pid=14207,fd=27))ESTAB      0      0       ::ffff:192.168.1.5:38194               ::ffff:192.168.1.5:2889                users:(("java",pid=14207,fd=29))ESTAB      0      0       ::ffff:192.168.1.5:41080               ::ffff:192.168.1.5:3889                users:(("java",pid=14207,fd=28))ESTAB      0      0       ::ffff:192.168.1.5:41584               ::ffff:192.168.1.5:3888                users:(("java",pid=14163,fd=27))ESTAB      0      0       ::ffff:192.168.1.5:3889                ::ffff:192.168.1.5:41080               users:(("java",pid=14163,fd=30))ESTAB      0      0       ::ffff:192.168.1.5:2889                ::ffff:192.168.1.5:38194               users:(("java",pid=14163,fd=31))ESTAB      0      0       ::ffff:192.168.1.5:38188               ::ffff:192.168.1.5:2889                users:(("java",pid=13285,fd=28))ESTAB      0      0       ::ffff:192.168.1.5:2889                ::ffff:192.168.1.5:38188               users:(("java",pid=14163,fd=29))ESTAB      0      0       ::ffff:192.168.1.5:3888                ::ffff:192.168.1.5:41584               users:(("java",pid=13285,fd=27))ESTAB      0      0       ::ffff:192.168.1.5:3888                ::ffff:192.168.1.5:41592               users:(("java",pid=13285,fd=29))

⑤测试创建一些znode

登陆到第一个节点，客户端端口为2181，创建znode

[root@kuting1 00]# ./zkCli.sh -server 127.0.0.1:2181

[zk: 127.0.0.1:2181(CONNECTED) 0] ls /

[zookeeper]

[zk: 127.0.0.1:2181(CONNECTED) 1] create /data test-data

Created /data

[zk: 127.0.0.1:2181(CONNECTED) 2] ls /

[zookeeper, data]

[zk: 127.0.0.1:2181(CONNECTED) 3] quit

登陆到第二个节点，客户端端口为2182，查看znode是否同步

[root@kuting1 bin]# ./zkCli.sh -server 127.0.0.1:2182

[zk: 127.0.0.1:2182(CONNECTED) 0] ls /

[zookeeper, data]

[zk: 127.0.0.1:2182(CONNECTED) 1] get /data

test-data #数据是一致的

cZxid = 0x100000002

ctime = Sat Aug 04 18:31:39 CST 2018

mZxid = 0x100000002

mtime = Sat Aug 04 18:31:39 CST 2018

pZxid = 0x100000002

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 9

numChildren = 0

[zk: 127.0.0.1:2182(CONNECTED) 2] quit

登陆到第三个节点，客户端端口为2183，查看znode是否同步

[root@kuting1 bin]# ./zkCli.sh -server 127.0.0.1:2183

[zk: 127.0.0.1:2183(CONNECTED) 0] ls /

[zookeeper, data]

[zk: 127.0.0.1:2183(CONNECTED) 1] get /data

test-data

cZxid = 0x100000002

ctime = Sat Aug 04 18:31:39 CST 2018

mZxid = 0x100000002

mtime = Sat Aug 04 18:31:39 CST 2018

pZxid = 0x100000002

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 9

numChildren = 0

[zk: 127.0.0.1:2183(CONNECTED) 2] quit

⑥查看集群状态

查看集群的状态、主从信息需要使用 ./zkServer.sh status 命令，但是多个节点的话，逐个查看有些费劲，所以我们写一个简单的shell脚本来批量执行命令。如下

[root@kuting1 ~]# cat checkzk.sh

#!/bin/bashn=(0 1 2)for i in ${n[@]};doecho $i/data/server/zookeeper0$i/bin/zkServer.sh statusdone

[root@kuting1 ~]# chmod +x checkzk.sh

[root@kuting1 ~]# ./checkzk.sh

0ZooKeeper JMX enabled by defaultUsing config: /data/server/zookeeper00/bin/../conf/zoo.cfgMode: follower1ZooKeeper JMX enabled by defaultUsing config: /data/server/zookeeper01/bin/../conf/zoo.cfgMode: leader2ZooKeeper JMX enabled by defaultUsing config: /data/server/zookeeper02/bin/../conf/zoo.cfgMode: follower

看到其中有节点已经当选为follower，数据已经同步，完成了单机伪分布式集群搭建

三、搭建分布式zookeeper集群

①环境准备

在搭建单机版之前已经拷贝过环境，关闭防火墙，三台机器均必须拥有java环境

将单机版删除，保留一个节点拷贝到其他机器

[root@kuting1 ~]# rm -rf /data/server/zookeeper0{1..2}

[root@kuting1 ~]# mv /data/server/zookeeper00/ /data/server/zookeeper

在其他节点上创建/data/server预程序目录、/data/data/zookeeper数据目录、/data/logs/zookeeper程序日志目录

[root@kuting1 ~]# rsync -az /data/server/zookeeper zk2:/data/server/zookeeper

[root@kuting1 ~]# rsync -az /data/server/zookeeper zk3:/data/server/zookeeper

逐个设置变量，添加在/etc/profile尾部，source加载一下

export ZOOKEEPER_HOME=/data/server/zookeeperexport JAVA_HOME=/data/server/javaexport PATH=$PATH:/data/server/java/bin:/data/server/zookeeper/bin

②配置zookeeper1

[root@kuting1 ~]# vim /data/server/zookeeper/conf/zoo.cfg

# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial # synchronization phase can takeinitLimit=10# The number of ticks that can pass between # sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.# do not use /tmp for storage, /tmp here is just # example sakes.dataDir=/data/data/zookeeper/dataLogDir=/data/logs/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 dataDirautopurge.snapRetainCount=3# Purge task interval in hours# Set to "0" to disable auto purge featureautopurge.purgeInterval=48server.1=192.168.1.5:2888:3888server.2=192.168.1.6:2888:3888server.3=192.168.1.7:2888:3888

默认server.1为master节点

[root@kuting2 ~]# echo 1 > /data/data/zookeeper/myid

③配置zookeeper2

[root@kuting1 ~]# vim /data/server/zookeeper/conf/zoo.cfg

# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial # synchronization phase can takeinitLimit=10# The number of ticks that can pass between # sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.# do not use /tmp for storage, /tmp here is just # example sakes.dataDir=/data/data/zookeeper/dataLogDir=/data/logs/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 dataDirautopurge.snapRetainCount=3# Purge task interval in hours# Set to "0" to disable auto purge featureautopurge.purgeInterval=48server.1=192.168.1.5:2888:3888server.2=192.168.1.6:2888:3888server.3=192.168.1.7:2888:3888

[root@kuting2 ~]# echo 2 > /data/data/zookeeper/myid

④配置zookeeper3

[root@kuting1 ~]# vim /data/server/zookeeper/conf/zoo.cfg

# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial # synchronization phase can takeinitLimit=10# The number of ticks that can pass between # sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.# do not use /tmp for storage, /tmp here is just # example sakes.dataDir=/data/data/zookeeper/dataLogDir=/data/logs/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 dataDirautopurge.snapRetainCount=3# Purge task interval in hours# Set to "0" to disable auto purge featureautopurge.purgeInterval=48server.1=192.168.1.5:2888:3888server.2=192.168.1.6:2888:3888server.3=192.168.1.7:2888:3888

[root@kuting2 ~]# echo 3 > /data/data/zookeeper/myid

⑤测试启动zookeeper集群

[root@kuting1 conf]# zkServer.sh start

[root@kuting2 conf]# zkServer.sh start

[root@kuting3 conf]# zkServer.sh start

查看三节点的集群状态(在启动之后有节点选举的过程，注意关闭防火墙)

[root@kuting1 zookeeper]# zkServer.sh status

ZooKeeper JMX enabled by defaultUsing config: /data/server/zookeeper/bin/../conf/zoo.cfgMode: leader

[root@kuting2 conf]# zkServer.sh status

ZooKeeper JMX enabled by defaultUsing config: /data/server/zookeeper/bin/../conf/zoo.cfgMode: follower

[root@kuting3 conf]# zkServer.sh status

ZooKeeper JMX enabled by defaultUsing config: /data/server/zookeeper/bin/../conf/zoo.cfgMode: follower

⑥测试创建znode，查看是否同步

[root@kuting3 zookeeper]# zkCli.sh -server 192.168.1.7:2181

[zk: 192.168.1.7:2181(CONNECTED) 0] ls /

[zookeeper]

[zk: 192.168.1.7:2181(CONNECTED) 1] create /real-culster real-data

Created /real-culster

[zk: 192.168.1.7:2181(CONNECTED) 2] ls /

[zookeeper, real-culster]

[zk: 192.168.1.7:2181(CONNECTED) 3] get /real-culster

real-data

cZxid = 0x100000002

ctime = Sat Sep 29 11:09:40 CST 2018

mZxid = 0x100000002

mtime = Sat Sep 29 11:09:40 CST 2018

pZxid = 0x100000002

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 9

numChildren = 0

[zk: 192.168.1.7:2181(CONNECTED) 4] quit

[root@kuting3 zookeeper]# zkCli.sh -server 192.168.1.5:2181

[zk: 192.168.1.5:2181(CONNECTED) 0] ls /

[zookeeper, real-culster]

[zk: 192.168.1.5:2181(CONNECTED) 1] get /real-culster

real-data

cZxid = 0x100000002

ctime = Sat Sep 29 11:09:40 CST 2018

mZxid = 0x100000002

mtime = Sat Sep 29 11:09:40 CST 2018

pZxid = 0x100000002

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 9

numChildren = 0

[zk: 192.168.1.5:2181(CONNECTED) 2] quit

[root@kuting3 zookeeper]# zkCli.sh -server 192.168.1.6:2181

[zk: 192.168.1.6:2181(CONNECTED) 0] ls /

[zookeeper, real-culster]

[zk: 192.168.1.6:2181(CONNECTED) 1] get /real-culster

real-data

cZxid = 0x100000002

ctime = Sat Sep 29 11:09:40 CST 2018

mZxid = 0x100000002

mtime = Sat Sep 29 11:09:40 CST 2018

pZxid = 0x100000002

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 9

numChildren = 0

[zk: 192.168.1.6:2181(CONNECTED) 2] quit

发现两个follower节点已经同步znode

⑦测试集群选举高可用

停止leader节点

[root@kuting1 zookeeper]# zkServer.sh status

ZooKeeper JMX enabled by defaultUsing config: /data/server/zookeeper/bin/../conf/zoo.cfgMode: leader

[root@kuting1 zookeeper]# zkServer.sh stop

ZooKeeper JMX enabled by defaultUsing config: /data/server/zookeeper/bin/../conf/zoo.cfgStopping zookeeper ... STOPPED

这时去到follower节点看看有没有被选举到leader

[root@kuting2 ~]# zkServer.sh status

ZooKeeper JMX enabled by defaultUsing config: /data/server/zookeeper/bin/../conf/zoo.cfgMode: leader

[root@kuting2 ~]# ip a | grep inet | grep ens33$

inet 192.168.1.6/24 brd 192.168.1.255 scope global noprefixroute ens33

[root@kuting1 conf]# zkServer.sh status

ZooKeeper JMX enabled by defaultUsing config: /data/server/zookeeper/bin/../conf/zoo.cfgMode: followe

[root@kuting1 conf]# ip a | grep inet | grep ens33$

inet 192.168.1.5/24 brd 192.168.1.255 scope global noprefixroute ens33

发现已经有follower节点被选举被leader，之后将停掉的zk启动起来

[root@kuting3 zookeeper]# zkServer.sh start

[root@kuting3 zookeeper]# zkServer.sh status

ZooKeeper JMX enabled by defaultUsing config: /data/server/zookeeper/bin/../conf/zoo.cfgMode: follower

发现他不会成为leader，而是扮演follower角色

[root@kuting2 ~]# zkServer.sh  status ZooKeeper JMX enabled by defaultUsing config: /data/server/zookeeper/bin/../conf/zoo.cfgMode: leader

leader角色没有改变，所以只有在选举的时候集群中的节点才会切换角色

四、使用docker搭建zookeeper集群

①下载docker以及docker-compose工具

②配置docker-compose.yml文件搭建zk集群

[root@kuting1 ~]# docker pull zookeeper

[root@kuting1 ~]# mkdir -p /data/docker/docker-compose/zookeeper-cluster

[root@kuting1 ~]# cd $!

[root@kuting1 zookeeper-cluster]# vim docker-compose.yml

version: '2'services:  zoo1:    image: zookeeper    restart: always    container_name: zk1    ports:      - "2181:2181"    environment:      ZOO_MY_ID: 1      ZOO_SERVERS: server.1=zk1:2888:3888 server.2=zk2:2888:3888 server.3=zk3:2888:3888  zk2:    image: zookeeper    restart: always    container_name: zk2    ports:      - "2182:2181"    environment:      ZOO_MY_ID: 2      ZOO_SERVERS: server.1=zk1:2888:3888 server.2=zk2:2888:3888 server.3=zk3:2888:3888  zk3:    image: zookeeper    restart: always    container_name: zk3    ports:      - "2183:2181"    environment:      ZOO_MY_ID: 3      ZOO_SERVERS: server.1=zk1:2888:3888 server.2=zk2:2888:3888 server.3=zk3:2888:3888

[root@kuting1 zookeeper-cluster]# docker-compose up -d

[root@kuting1 zookeeper-cluster]# docker-compose ps

Name              Command               State                     Ports                   ------------------------------------------------------------------------------------------zk1    /docker-entrypoint.sh zkSe ...   Up      0.0.0.0:2181->2181/tcp, 2888/tcp, 3888/tcpzk2    /docker-entrypoint.sh zkSe ...   Up      0.0.0.0:2182->2181/tcp, 2888/tcp, 3888/tcpzk3    /docker-entrypoint.sh zkSe ...   Up      0.0.0.0:2183->2181/tcp, 2888/tcp, 3888/tcp

③检查zookeeper集群状态

[root@kuting1 zookeeper-cluster]# echo stat | nc 127.0.0.1 2182

Zookeeper version: 3.4.13-2d71af4dbe22557fda74f9a9b4309b15a7487f03, built on 06/29/2018 04:05 GMTClients: /172.18.0.1:40116[0](queued=0,recved=1,sent=0)Latency min/avg/max: 0/0/0Received: 1Sent: 0Connections: 1Outstanding: 0Zxid: 0x100000002Mode: followerNode count: 4

[root@kuting1 zookeeper-cluster]# echo stat | nc 127.0.0.1 2181

Zookeeper version: 3.4.13-2d71af4dbe22557fda74f9a9b4309b15a7487f03, built on 06/29/2018 04:05 GMTClients: /172.18.0.1:55510[0](queued=0,recved=1,sent=0)Latency min/avg/max: 0/33/66Received: 3Sent: 2Connections: 1Outstanding: 0Zxid: 0x100000002Mode: followerNode count: 4

[root@kuting1 zookeeper-cluster]# echo stat | nc 127.0.0.1 2183

Zookeeper version: 3.4.13-2d71af4dbe22557fda74f9a9b4309b15a7487f03, built on 06/29/2018 04:05 GMTClients: /172.18.0.1:34678[0](queued=0,recved=1,sent=0)Latency min/avg/max: 0/0/0Received: 1Sent: 0Connections: 1Outstanding: 0Zxid: 0x100000002Mode: leaderNode count: 4Proposal sizes last/min/max: 32/32/36

④检查znode数据同步

[root@kuting1 ~]# zkCli.sh -server 127.0.0.1:2181 #2181端口为zk1，根据yml文件中的映射关系依次类推

[zk: 127.0.0.1:2181(CONNECTED) 3] create /data test-data

[root@kuting1 ~]# zkCli.sh -server 127.0.0.1:2182

[zk: 127.0.0.1:2182(CONNECTED) 0] ls /

[zookeeper, data]

[root@kuting1 ~]# zkCli.sh -server 127.0.0.1:2183

[zk: 127.0.0.1:2183(CONNECTED) 0] ls /

[zookeeper, data]

发现集群状态与数据都已经正常，搭建完毕

五、关于常用的zookeeper优化

①
tickTime:CS通信心跳数，Zookeeper 服务器之间或客户端与服务器之间维持心跳的时间间隔，也就是每个 tickTime时间就会发送一个心跳。tickTime以毫秒为单位。该参数用来定义心跳的间隔时间，zookeeper的客户端和服务端之间也有和web开发里类似的session的概念，而zookeeper里最小的session过期时间就是tickTime的两倍

②initLimit：LF初始通信时限，集群中的follower服务器(F)与leader服务器(L)之间初始连接时能容忍的最多心跳数（tickTime的数量）。此配置表示，允许 follower （相对于 leader 而言的“客户端”）连接并同步到leader 的初始化连接时间，它以 tickTime 的倍数来表示。当超过设置倍数的 tickTime 时间，则连接失败

③syncLimit：LF同步通信时限，集群中的follower服务器(F)与leader服务器(L)之间请求和应答之间能容忍的最多心跳数（tickTime的数量）。此配置表示， leader 与 follower 之间发送消息，请求和应答时间长度。如果 follower 在设置的时间内不能与leader 进行通信，那么此 follower 将被丢弃

④4lw.commands.whitelist：命令的白名单，没有在的会禁止。4lw.commands.whitelist=stat,ruok, conf, isro

⑤服务器名称与地址：集群信息（服务器编号，服务器地址，LF通信端口，选举端口）

⑥这个配置项的书写格式比较特殊，规则如下：
server.N=YYY:A:B
server.1=itcast05:2888:3888
server.2=itcast06:2888:3888
server.3=itcast07:2888:3888