原文连接：https://www.cnblogs.com/rwxwsblog/p/5806075.html

zookeeper集群搭建（三台）

注意关闭机器防火墙！

配置ip别名：编辑文件 

#  /etc/hosts

加入内容：

192.168.1.80 c1

192.168.1.81 c2

192.168.1.82 c3

zookeeper安装

#  mkdir -p /var/download && cd /var/download

#  wget -c http://www.eu.apache.org/dist/zookeeper/zookeeper-3.4.6/zookeeper-3.4.6.tar.gz

#  tar zxvf zookeeper-3.4.6.tar.gz

#   mkdir -p /var/local/server

#   mv zookeeper-3.4.6 /var/local/server/zookeeper

#   cd /var/local/server/zookeeper/conf

#   touch zoo.cfg

配置 zoo.cfg，添加内容

tickTime=2000

dataDir=/var/data/zookeeper

dataLogDir=/var/local/server/zookeeper/log

clientPort=2181

initLimit=5

syncLimit=2

server.1=c1:2888:3888

server.2=c2:2888:3888

server.3=c3:2888:3888

创建数据目录和日志目录：

# mkdir -p /var/data/zookeeper

# mkdir -p /var/local/server/zookeeper/log

创建myid文件， id 与 zoo.cfg 中的序号对应，位置在数据目录下，c1为1、c2为2 、 c3为3

# echo 1 > /var/data/zookeeper/myid

常用命令：

启动

/var/local/server/zookeeper/bin/zkServer.sh start

查看状态

/var/local/server/zookeeper/bin/zkServer.sh status

重启

/var/local/server/zookeeper/bin/zkServer.sh restart

关闭

/var/local/server/zookeeper/bin/zkServer.sh stop
在其中一台用客户端连接
/var/local/server/zookeeper/bin/zkCli.sh -server c1:2181

操作实例：

  • 启动：/var/local/server/zookeeper/bin/zkServer.sh start
[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh start

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Starting zookeeper ... STARTED
  • 查看状态：/var/local/server/zookeeper/bin/zkServer.sh status
[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Error contacting service. It is probably not running.

此时发现zookeeper并没有正常运行。

查看日志more zookeeper.out，发现如下异常：

2016-08-25 09:55:54,088 [myid:1] - WARN  [WorkerSender[myid=1]:QuorumCnxManager@382] - Cannot open channel to 2 at election address c2/192.168.1.81:3888

java.net.NoRouteToHostException: No route to host

        at java.net.PlainSocketImpl.socketConnect(Native Method)

        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)

        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)

        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)

        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

        at java.net.Socket.connect(Socket.java:579)

        at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:368)

        at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:341)

        at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:449)

        at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:430)

        at java.lang.Thread.run(Thread.java:745)

2016-08-25 09:55:54,101 [myid:1] - WARN  [WorkerSender[myid=1]:QuorumCnxManager@382] - Cannot open channel to 3 at election address c3/192.168.1.82:3888

java.net.ConnectException: Connection refused

        at java.net.PlainSocketImpl.socketConnect(Native Method)

        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)

        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)

        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)

        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

        at java.net.Socket.connect(Socket.java:579)

        at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:368)

        at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:341)

        at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:449)

        at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:430)

        at java.lang.Thread.run(Thread.java:745)

2016-08-25 09:55:54,287 [myid:1] - WARN  [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@382] - Cannot open channel to 2 at election address c2/192.168.1.81:3888

java.net.NoRouteToHostException: No route to host

        at java.net.PlainSocketImpl.socketConnect(Native Method)

        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)

        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)

        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)

        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

        at java.net.Socket.connect(Socket.java:579)

        at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:368)

        at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:402)

        at org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:840)

        at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:762)

这是由于2、3号机器没有正常配置导致。可以在zoo.cfg中将其注释后再次尝试。

tickTime=2000

dataDir=/var/data/zookeeper

dataLogDir=/var/local/server/zookeeper/log

clientPort=2181

initLimit=5

syncLimit=2

server.1=c1:2888:3888

#server.2=c2:2888:3888

#server.3=c3:2888:3888

正常启动效果：[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh start

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Starting zookeeper ... STARTED

[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: standalone

测试

在 c1 上连接 c1 上的 zookeeper

/var/local/server/zookeeper/bin/zkCli.sh -server c1:2181

[root@sso conf]# /var/local/server/zookeeper/bin/zkCli.sh -server c1:2181

Connecting to c1:2181

2016-08-25 10:06:30,235 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.6-1569965, built on 02/20/2014 09:09 GMT

2016-08-25 10:06:30,244 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=sso.xxx.com

2016-08-25 10:06:30,244 [myid:] - INFO  [main:Environment@100] - Client environment:java.version=1.7.0_79

2016-08-25 10:06:30,250 [myid:] - INFO  [main:Environment@100] - Client environment:java.vendor=Oracle Corporation

2016-08-25 10:06:30,251 [myid:] - INFO  [main:Environment@100] - Client environment:java.home=/usr/local/jdk1.7.0_79/jre

2016-08-25 10:06:30,251 [myid:] - INFO  [main:Environment@100] - Client environment:java.class.path=/var/local/server/zookeeper/bin/../build/classes:/var/local/server/zookeeper/bin/../build/lib/*.jar:/var/local/server/zookeeper/bin/../lib/slf4j-log4j12-1.6.1.jar:/var/local/server/zookeeper/bin/../lib/slf4j-api-1.6.1.jar:/var/local/server/zookeeper/bin/../lib/netty-3.7.0.Final.jar:/var/local/server/zookeeper/bin/../lib/log4j-1.2.16.jar:/var/local/server/zookeeper/bin/../lib/jline-0.9.94.jar:/var/local/server/zookeeper/bin/../zookeeper-3.4.6.jar:/var/local/server/zookeeper/bin/../src/java/lib/*.jar:/var/local/server/zookeeper/bin/../conf:

2016-08-25 10:06:30,251 [myid:] - INFO  [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib

2016-08-25 10:06:30,252 [myid:] - INFO  [main:Environment@100] - Client environment:java.io.tmpdir=/tmp

2016-08-25 10:06:30,252 [myid:] - INFO  [main:Environment@100] - Client environment:java.compiler=<NA>

2016-08-25 10:06:30,252 [myid:] - INFO  [main:Environment@100] - Client environment:os.name=Linux

2016-08-25 10:06:30,252 [myid:] - INFO  [main:Environment@100] - Client environment:os.arch=amd64

2016-08-25 10:06:30,253 [myid:] - INFO  [main:Environment@100] - Client environment:os.version=3.10.0-327.10.1.el7.x86_64

2016-08-25 10:06:30,253 [myid:] - INFO  [main:Environment@100] - Client environment:user.name=root

2016-08-25 10:06:30,253 [myid:] - INFO  [main:Environment@100] - Client environment:user.home=/root

2016-08-25 10:06:30,254 [myid:] - INFO  [main:Environment@100] - Client environment:user.dir=/var/local/server/zookeeper/conf

2016-08-25 10:06:30,257 [myid:] - INFO  [main:ZooKeeper@438] - Initiating client connection, connectString=c1:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@194d62f1

Welcome to ZooKeeper!

2016-08-25 10:06:30,335 [myid:] - INFO  [main-SendThread(sso.xxx.com:2181):ClientCnxn$SendThread@975] - Opening socket connection to server sso.xxx.com/192.168.1.80:2181. Will not attempt to authenticate using SASL (unknown error)

JLine support is enabled

2016-08-25 10:06:30,349 [myid:] - INFO  [main-SendThread(sso.xxx.com:2181):ClientCnxn$SendThread@852] - Socket connection established to sso.xxx.com/192.168.1.80:2181, initiating session

2016-08-25 10:06:30,412 [myid:] - INFO  [main-SendThread(sso.xxx.com:2181):ClientCnxn$SendThread@1235] - Session establishment complete on server sso.xxx.com/192.168.1.80:2181, sessionid = 0x156bf70d7580000, negotiated timeout = 30000

WATCHER::

WatchedEvent state:SyncConnected type:None path:null

[zk: c1:2181(CONNECTED) 0]

添加一个根节点目录zookeeper_project

create /project zookeeper_project

[zk: c1:2181(CONNECTED) 0] create /project  zookeeper_project

Created /project

[zk: c1:2181(CONNECTED) 1] get /project

zookeeper_project

cZxid = 0x2

ctime = Thu Aug 25 10:09:09 CST 2016

mZxid = 0x2

mtime = Thu Aug 25 10:09:09 CST 2016

pZxid = 0x2

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 17

numChildren = 0

此时说明单机配置成功

多机集群

取消zoo.cfg中server.2和server.3的注释，最后zoo.cfg配置文件如下：

tickTime=2000

dataDir=/var/data/zookeeper

dataLogDir=/var/local/server/zookeeper/log

clientPort=2181

initLimit=5

syncLimit=2

server.1=c1:2888:3888

server.2=c2:2888:3888

server.3=c3:2888:3888

在c2和c3中执行类似的操作

多机联合测试

c1运行结果：

[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: leader

c2运行结果：

[root@cas zookeeper]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: follower

c3运行结果：

[root@localhost zookeeper]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: follower

同步测试

c1上执行：

create /c1project c1projecttest和get /c1project

[zk: c1:2181(CONNECTED) 2] create /c1project c1projecttest

Created /c1project

[zk: c1:2181(CONNECTED) 1] get /c1project

c1projecttest

cZxid = 0x100000013

ctime = Thu Aug 25 11:03:49 CST 2016

mZxid = 0x100000013

mtime = Thu Aug 25 11:03:49 CST 2016

pZxid = 0x100000013

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 13

numChildren = 0

c2上查看同步结果：

get /c1project

[zk: c2:2181(CONNECTED) 0] get /c1project

c1projecttest

cZxid = 0x100000013

ctime = Thu Aug 25 11:03:49 CST 2016

mZxid = 0x100000013

mtime = Thu Aug 25 11:03:49 CST 2016

pZxid = 0x100000013

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 13

numChildren = 0

c3上查看同步结果：

[zk: c3:2181(CONNECTED) 4] get /c1project

c1projecttest

cZxid = 0x100000013

ctime = Thu Aug 25 11:03:49 CST 2016

mZxid = 0x100000013

mtime = Thu Aug 25 11:03:49 CST 2016

pZxid = 0x100000013

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 13

numChildren = 0

此时说明zookeeper集群配置成功。

从节点主动升级和接管成为主节点

leader和follower的自动切换，前面我们知道c1是leader，当leader down掉后是否有从节点升级为leader。

c1上执行

/var/local/server/zookeeper/bin/zkServer.sh stop

c2上查看状态

[root@cas ~]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: follower

可以发现c2仍然为从节点

再看看c3

[root@localhost ~]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: leader

此时c3升级为了主节点

再次启动c1，并查看状态

[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh start

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Starting zookeeper ... STARTED

[root@sso conf]#

[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: follower

发现c1作为了从节点。

zookeeper部署及集群测试

 

zookeeper部署及集群测试

环境

三台测试机

  • 操作系统: centos7 ; hostname: c1 ; ip: 192.168.1.80
  • 操作系统: centos7 ; hostname: c2 ; ip: 192.168.1.81
  • 操作系统: centos7 ; hostname: c3 ; ip: 192.168.1.82

备注

注意要关闭防火墙

查看磁盘状况

为了避免磁盘使用不均而导致系统问题，因而先查看磁盘的分布情况。

[root@sso conf]# df -lh

Filesystem               Size  Used Avail Use% Mounted on

/dev/mapper/centos-root   50G   18G   33G  36% /

devtmpfs                 7.8G     0  7.8G   0% /dev

tmpfs                    7.8G     0  7.8G   0% /dev/shm

tmpfs                    7.8G   65M  7.7G   1% /run

tmpfs                    7.8G     0  7.8G   0% /sys/fs/cgroup

/dev/mapper/centos-var   900G  529M  900G   1% /var

/dev/mapper/centos-home   66G   12G   55G  18% /home

/dev/sda1                497M  168M  330M  34% /boot

tmpfs                    1.6G     0  1.6G   0% /run/user/0

[root@sso conf]#

/var目录共900G，只使用了1%不到，因此可以将后续的所有文件和程序存放在此目录下。当然，这要根据你的实际情况而定。

zookeeper安装

安装

 mkdir -p /var/download && cd /var/download

 wget -c http://www.eu.apache.org/dist/zookeeper/zookeeper-3.4.6/zookeeper-3.4.6.tar.gz

 tar zxvf zookeeper-3.4.6.tar.gz

 mkdir -p /var/local/server

 mv zookeeper-3.4.6 /var/local/server/zookeeper

 cd /var/local/server/zookeeper/conf

 touch zoo.cfg

编辑zoo.cfg中加入如下内容：

tickTime=2000

dataDir=/var/data/zookeeper

dataLogDir=/var/local/server/zookeeper/log

clientPort=2181

initLimit=5

syncLimit=2

server.1=c1:2888:3888

server.2=c2:2888:3888

server.3=c3:2888:3888

保存

创建数据目录和日志目录：

mkdir -p /var/data/zookeeper

mkdir -p /var/local/server/zookeeper/log

如不创建启动时会报如下异常：

[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Error contacting service. It is probably not running.

创建myid文件， id 与 zoo.cfg 中的序号对应

echo 1 > /var/data/zookeeper/myid

注意：

  • 注意，如果是c2和c3中进行相应的修改
  • c2上应改为：echo 2 > /var/data/zookeeper/myid
  • c3上应改为：echo 3 > /var/data/zookeeper/myid

配置hosts文件：编辑/etc/hosts，加入如下内容：

192.168.1.80 c1

192.168.1.81 c2

192.168.1.82 c3

常用命令

启动

/var/local/server/zookeeper/bin/zkServer.sh start

查看状态

/var/local/server/zookeeper/bin/zkServer.sh status

重启

/var/local/server/zookeeper/bin/zkServer.sh restart

关闭

/var/local/server/zookeeper/bin/zkServer.sh stop

在其中一台用客户端连接

/var/local/server/zookeeper/bin/zkCli.sh -server c1:2181

操作实例：

  • 启动：/var/local/server/zookeeper/bin/zkServer.sh start
[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh start

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Starting zookeeper ... STARTED
  • 查看状态：/var/local/server/zookeeper/bin/zkServer.sh status
[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Error contacting service. It is probably not running.

此时发现zookeeper并没有正常运行。

查看日志more zookeeper.out，发现如下异常：

2016-08-25 09:55:54,088 [myid:1] - WARN  [WorkerSender[myid=1]:QuorumCnxManager@382] - Cannot open channel to 2 at election address c2/192.168.1.81:3888

java.net.NoRouteToHostException: No route to host

        at java.net.PlainSocketImpl.socketConnect(Native Method)

        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)

        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)

        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)

        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

        at java.net.Socket.connect(Socket.java:579)

        at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:368)

        at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:341)

        at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:449)

        at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:430)

        at java.lang.Thread.run(Thread.java:745)

2016-08-25 09:55:54,101 [myid:1] - WARN  [WorkerSender[myid=1]:QuorumCnxManager@382] - Cannot open channel to 3 at election address c3/192.168.1.82:3888

java.net.ConnectException: Connection refused

        at java.net.PlainSocketImpl.socketConnect(Native Method)

        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)

        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)

        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)

        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

        at java.net.Socket.connect(Socket.java:579)

        at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:368)

        at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:341)

        at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:449)

        at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:430)

        at java.lang.Thread.run(Thread.java:745)

2016-08-25 09:55:54,287 [myid:1] - WARN  [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:QuorumCnxManager@382] - Cannot open channel to 2 at election address c2/192.168.1.81:3888

java.net.NoRouteToHostException: No route to host

        at java.net.PlainSocketImpl.socketConnect(Native Method)

        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)

        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)

        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)

        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

        at java.net.Socket.connect(Socket.java:579)

        at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:368)

        at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:402)

        at org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:840)

        at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:762)

这是由于2、3号机器没有正常配置导致。可以在zoo.cfg中将其注释后再次尝试。

tickTime=2000

dataDir=/var/data/zookeeper

dataLogDir=/var/local/server/zookeeper/log

clientPort=2181

initLimit=5

syncLimit=2

server.1=c1:2888:3888

#server.2=c2:2888:3888

#server.3=c3:2888:3888

正常启动效果：

[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh start

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Starting zookeeper ... STARTED

[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: standalone

测试

在 c1 上连接 c1 上的 zookeeper

/var/local/server/zookeeper/bin/zkCli.sh -server c1:2181

[root@sso conf]# /var/local/server/zookeeper/bin/zkCli.sh -server c1:2181

Connecting to c1:2181

2016-08-25 10:06:30,235 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.6-1569965, built on 02/20/2014 09:09 GMT

2016-08-25 10:06:30,244 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=sso.xxx.com

2016-08-25 10:06:30,244 [myid:] - INFO  [main:Environment@100] - Client environment:java.version=1.7.0_79

2016-08-25 10:06:30,250 [myid:] - INFO  [main:Environment@100] - Client environment:java.vendor=Oracle Corporation

2016-08-25 10:06:30,251 [myid:] - INFO  [main:Environment@100] - Client environment:java.home=/usr/local/jdk1.7.0_79/jre

2016-08-25 10:06:30,251 [myid:] - INFO  [main:Environment@100] - Client environment:java.class.path=/var/local/server/zookeeper/bin/../build/classes:/var/local/server/zookeeper/bin/../build/lib/*.jar:/var/local/server/zookeeper/bin/../lib/slf4j-log4j12-1.6.1.jar:/var/local/server/zookeeper/bin/../lib/slf4j-api-1.6.1.jar:/var/local/server/zookeeper/bin/../lib/netty-3.7.0.Final.jar:/var/local/server/zookeeper/bin/../lib/log4j-1.2.16.jar:/var/local/server/zookeeper/bin/../lib/jline-0.9.94.jar:/var/local/server/zookeeper/bin/../zookeeper-3.4.6.jar:/var/local/server/zookeeper/bin/../src/java/lib/*.jar:/var/local/server/zookeeper/bin/../conf:

2016-08-25 10:06:30,251 [myid:] - INFO  [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib

2016-08-25 10:06:30,252 [myid:] - INFO  [main:Environment@100] - Client environment:java.io.tmpdir=/tmp

2016-08-25 10:06:30,252 [myid:] - INFO  [main:Environment@100] - Client environment:java.compiler=<NA>

2016-08-25 10:06:30,252 [myid:] - INFO  [main:Environment@100] - Client environment:os.name=Linux

2016-08-25 10:06:30,252 [myid:] - INFO  [main:Environment@100] - Client environment:os.arch=amd64

2016-08-25 10:06:30,253 [myid:] - INFO  [main:Environment@100] - Client environment:os.version=3.10.0-327.10.1.el7.x86_64

2016-08-25 10:06:30,253 [myid:] - INFO  [main:Environment@100] - Client environment:user.name=root

2016-08-25 10:06:30,253 [myid:] - INFO  [main:Environment@100] - Client environment:user.home=/root

2016-08-25 10:06:30,254 [myid:] - INFO  [main:Environment@100] - Client environment:user.dir=/var/local/server/zookeeper/conf

2016-08-25 10:06:30,257 [myid:] - INFO  [main:ZooKeeper@438] - Initiating client connection, connectString=c1:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@194d62f1

Welcome to ZooKeeper!

2016-08-25 10:06:30,335 [myid:] - INFO  [main-SendThread(sso.xxx.com:2181):ClientCnxn$SendThread@975] - Opening socket connection to server sso.xxx.com/192.168.1.80:2181. Will not attempt to authenticate using SASL (unknown error)

JLine support is enabled

2016-08-25 10:06:30,349 [myid:] - INFO  [main-SendThread(sso.xxx.com:2181):ClientCnxn$SendThread@852] - Socket connection established to sso.xxx.com/192.168.1.80:2181, initiating session

2016-08-25 10:06:30,412 [myid:] - INFO  [main-SendThread(sso.xxx.com:2181):ClientCnxn$SendThread@1235] - Session establishment complete on server sso.xxx.com/192.168.1.80:2181, sessionid = 0x156bf70d7580000, negotiated timeout = 30000

WATCHER::

WatchedEvent state:SyncConnected type:None path:null

[zk: c1:2181(CONNECTED) 0]

添加一个根节点目录zookeeper_project

create /project zookeeper_project

[zk: c1:2181(CONNECTED) 0] create /project  zookeeper_project

Created /project

[zk: c1:2181(CONNECTED) 1] get /project

zookeeper_project

cZxid = 0x2

ctime = Thu Aug 25 10:09:09 CST 2016

mZxid = 0x2

mtime = Thu Aug 25 10:09:09 CST 2016

pZxid = 0x2

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 17

numChildren = 0

此时说明单机配置成功

多机集群

取消zoo.cfg中server.2和server.3的注释，最后zoo.cfg配置文件如下：

tickTime=2000

dataDir=/var/data/zookeeper

dataLogDir=/var/local/server/zookeeper/log

clientPort=2181

initLimit=5

syncLimit=2

server.1=c1:2888:3888

server.2=c2:2888:3888

server.3=c3:2888:3888

在c2和c3中执行类似的操作

多机联合测试

c1运行结果：

[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: leader

c2运行结果：

[root@cas zookeeper]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: follower

c3运行结果：

[root@localhost zookeeper]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: follower

同步测试

c1上执行：

create /c1project c1projecttest和get /c1project

[zk: c1:2181(CONNECTED) 2] create /c1project c1projecttest

Created /c1project

[zk: c1:2181(CONNECTED) 1] get /c1project

c1projecttest

cZxid = 0x100000013

ctime = Thu Aug 25 11:03:49 CST 2016

mZxid = 0x100000013

mtime = Thu Aug 25 11:03:49 CST 2016

pZxid = 0x100000013

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 13

numChildren = 0

c2上查看同步结果：

get /c1project

[zk: c2:2181(CONNECTED) 0] get /c1project

c1projecttest

cZxid = 0x100000013

ctime = Thu Aug 25 11:03:49 CST 2016

mZxid = 0x100000013

mtime = Thu Aug 25 11:03:49 CST 2016

pZxid = 0x100000013

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 13

numChildren = 0

c3上查看同步结果：

[zk: c3:2181(CONNECTED) 4] get /c1project

c1projecttest

cZxid = 0x100000013

ctime = Thu Aug 25 11:03:49 CST 2016

mZxid = 0x100000013

mtime = Thu Aug 25 11:03:49 CST 2016

pZxid = 0x100000013

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 13

numChildren = 0

此时说明zookeeper集群配置成功。

从节点主动升级和接管成为主节点

leader和follower的自动切换，前面我们知道c1是leader，当leader down掉后是否有从节点升级为leader。

c1上执行

/var/local/server/zookeeper/bin/zkServer.sh stop

c2上查看状态

[root@cas ~]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: follower

可以发现c2仍然为从节点

再看看c3

[root@localhost ~]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: leader

此时c3升级为了主节点

再次启动c1，并查看状态

[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh start

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Starting zookeeper ... STARTED

[root@sso conf]#

[root@sso conf]# /var/local/server/zookeeper/bin/zkServer.sh status

JMX enabled by default

Using config: /var/local/server/zookeeper/bin/../conf/zoo.cfg

Mode: follower

发现c1作为了从节点。

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