Centos 搭建 zookeeper

network

安装
　　zookeeper-3.4.9.tar.gz

下载：
https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/stable/zookeeper-3.4.9.tar.gz

为了方便管理，我放在目录/opt/中
　　解压:
tar zxf zookeeper-3.4.9.tar.gz　　
进入配置目录：
cd zookeeper-3.4.9/conf创建配置(直接clone样例配置)：
cp zoo_sample.cfg zoo.cfg注：zoo_sample.cfg是一个用来demo的例子配置


先配置单机模式：



修改配置：
# 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.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=/opt/zookeeper-3.4.9/data
// 日志文件
dataLogDir=/opt/zookeeper-3.4.9/logs
# the port at which the clients will connect
clientPort=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 feature
#autopurge.purgeInterval=1配置环境变量:
打开系统配置文件：
vim /etc/profile加入：
export ZOOKEEPER_HOME=/opt/zookeeper-3.4.9/追加到环境变量$Path中：
export PATH=$PATH:….$ZOOKEEPER_HOME/bin/退出：
:wq重新激活环境变量配置：
[root@centos_105_239 bin]# source /etc/profile启动ZooKeeper:
[root@centos_105_239 bin]# zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.9/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED查询zk的状态：
[root@centos_105_239 bin]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.9/bin/../conf/zoo.cfg
Mode: standalone关闭ZooKeeper:
[root@centos_105_239 bin]# zkServer.sh stop
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.9/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED重启ZooKeeper(由于当前是关闭状态，所以会有下面no zookeeper的信息):
[root@centos_105_239 bin]# zkServer.sh restart
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.9/bin/../conf/zoo.cfg
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.9/bin/../conf/zoo.cfg
Stopping zookeeper ... no zookeeper to stop (could not find file /opt/zookeeper-3.4.9/data
/opt/zookeeper-3.4.9/logs/zookeeper_server.pid)
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.9/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED客户端测试链接服务端：
[root@centos_105_239 bin]# zkCli.sh -server 127.0.0.1:2181
Connecting to 127.0.0.1:2181
2016-11-01 22:20:40,226 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.9-1757313, built on 08/23/2016 06:50 GMT
2016-11-01 22:20:40,229 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=
2016-11-01 22:20:40,229 [myid:] - INFO  [main:Environment@100] - Client environment:java.version=1.8.0_111
2016-11-01 22:20:40,230 [myid:] - INFO  [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
2016-11-01 22:20:40,231 [myid:] - INFO  [main:Environment@100] - Client environment:java.home=/usr/java/jdk1.8.0_111/jre
2016-11-01 22:20:40,231 [myid:] - INFO  [main:Environment@100] - Client environment:java.class.path=/opt/zookeeper-3.4.9/bin/../build/classes:/opt/zookeeper-3.4.9/bin/../build/lib/*.jar:/opt/zookeeper-3.4.9/bin/../lib/slf4j-log4j12-1.6.1.jar:/opt/zookeeper-3.4.9/bin/../lib/slf4j-api-1.6.1.jar:/opt/zookeeper-3.4.9/bin/../lib/netty-3.10.5.Final.jar:/opt/zookeeper-3.4.9/bin/../lib/log4j-1.2.16.jar:/opt/zookeeper-3.4.9/bin/../lib/jline-0.9.94.jar:/opt/zookeeper-3.4.9/bin/../zookeeper-3.4.9.jar:/opt/zookeeper-3.4.9/bin/../src/java/lib/*.jar:/opt/zookeeper-3.4.9/bin/../conf:
2016-11-01 22:20:40,231 [myid:] - INFO  [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2016-11-01 22:20:40,231 [myid:] - INFO  [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2016-11-01 22:20:40,231 [myid:] - INFO  [main:Environment@100] - Client environment:java.compiler=
2016-11-01 22:20:40,231 [myid:] - INFO  [main:Environment@100] - Client environment:os.name=Linux
2016-11-01 22:20:40,231 [myid:] - INFO  [main:Environment@100] - Client environment:os.arch=amd64
2016-11-01 22:20:40,231 [myid:] - INFO  [main:Environment@100] - Client environment:os.version=3.10.0-327.el7.x86_64
2016-11-01 22:20:40,231 [myid:] - INFO  [main:Environment@100] - Client environment:user.name=root
2016-11-01 22:20:40,231 [myid:] - INFO  [main:Environment@100] - Client environment:user.home=/root
2016-11-01 22:20:40,231 [myid:] - INFO  [main:Environment@100] - Client environment:user.dir=/opt/zookeeper-3.4.9/bin
2016-11-01 22:20:40,232 [myid:] - INFO  [main:ZooKeeper@438] - Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@446cdf90
Welcome to ZooKeeper!
JLine support is enabled
2016-11-01 22:20:40,345 [myid:] - INFO  [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1032] - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
2016-11-01 22:20:40,505 [myid:] - WARN  [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1162] - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)解决：重启Zookeeper服务 - zkServer.sh restart



重新测试客户端链接服务端：
[root@centos_105_239bin]# zkCli.sh
Connecting tolocalhost:2181
2016-11-0217:16:01,054 [myid:] - INFO [main:Environment@100] - Clientenvironment:zookeeper.version=3.4.9-1757313, built on 08/23/2016 06:50 GMT
2016-11-0217:16:01,062 [myid:] - INFO [main:Environment@100] - Client environment:host.name=Centos_105_239
2016-11-0217:16:01,062 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.8.0_111
2016-11-0217:16:01,066 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=OracleCorporation
2016-11-0217:16:01,066 [myid:] - INFO [main:Environment@100] - Clientenvironment:java.home=/usr/java/jdk1.8.0_111/jre
2016-11-0217:16:01,066 [myid:] - INFO [main:Environment@100] - Clientenvironment:java.class.path=/opt/zookeeper-3.4.9/bin/../build/classes:/opt/zookeeper-3.4.9/bin/../build/lib/*.jar:/opt/zookeeper-3.4.9/bin/../lib/slf4j-log4j12-1.6.1.jar:/opt/zookeeper-3.4.9/bin/../lib/slf4j-api-1.6.1.jar:/opt/zookeeper-3.4.9/bin/../lib/netty-3.10.5.Final.jar:/opt/zookeeper-3.4.9/bin/../lib/log4j-1.2.16.jar:/opt/zookeeper-3.4.9/bin/../lib/jline-0.9.94.jar:/opt/zookeeper-3.4.9/bin/../zookeeper-3.4.9.jar:/opt/zookeeper-3.4.9/bin/../src/java/lib/*.jar:/opt/zookeeper-3.4.9/bin/../conf:
2016-11-0217:16:01,067 [myid:] - INFO [main:Environment@100] - Clientenvironment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2016-11-0217:16:01,067 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2016-11-0217:16:01,067 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=
2016-11-0217:16:01,067 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux
2016-11-0217:16:01,067 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64
2016-11-0217:16:01,067 [myid:] - INFO [main:Environment@100] - Clientenvironment:os.version=3.10.0-327.el7.x86_64
2016-11-0217:16:01,068 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root
2016-11-0217:16:01,068 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root
2016-11-0217:16:01,068 [myid:] - INFO [main:Environment@100] - Clientenvironment:user.dir=/opt/zookeeper-3.4.9/bin
2016-11-0217:16:01,073 [myid:] - INFO [main:ZooKeeper@438] - Initiating client connection,connectString=localhost:2181 sessionTimeout=30000watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@446cdf90
Welcome toZooKeeper!
JLine support isenabled
2016-11-0217:16:06,165 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1032] - Openingsocket connection to server localhost/127.0.0.1:2181. Will not attempt toauthenticate using SASL (unknown error)
2016-11-0217:16:06,306 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@876] - Socketconnection established to localhost/127.0.0.1:2181, initiating session
2016-11-0217:16:06,328 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1299] - Sessionestablishment complete on server localhost/127.0.0.1:2181, sessionid =0x15823b834e60008, negotiated timeout = 30000
WATCHER::
WatchedEventstate:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED)0]#见到最后一行才算是成功。
测试

创建一个节点
[zk:localhost:2181(CONNECTED) 3] create /node helloword
Created /node
[zk:localhost:2181(CONNECTED) 4] ls /
[node, zookeeper]获取节点
[zk:localhost:2181(CONNECTED) 8] get /node
helloword
cZxid = 0x17
ctime = Wed Nov 0217:17:25 CST 2016
mZxid = 0x17
mtime = Wed Nov 0217:17:25 CST 2016
pZxid = 0x17
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 9
numChildren = 0设置节点
[zk:localhost:2181(CONNECTED) 9] set /node helloword!
cZxid = 0x17
ctime = Wed Nov 0217:17:25 CST 2016
mZxid = 0x1d
mtime = Wed Nov 0217:19:40 CST 2016
pZxid = 0x17
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 10
numChildren = 0再次获取节点，看看变化：
[zk:localhost:2181(CONNECTED) 10] get /node
helloword!
cZxid = 0x17
ctime = Wed Nov 0217:17:25 CST 2016
mZxid = 0x1d
mtime = Wed Nov 0217:19:40 CST 2016
pZxid = 0x17
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 10
numChildren = 0测试删除节点：
[zk:localhost:2181(CONNECTED) 14] ls /
[node, zookeeper,test]
[zk:localhost:2181(CONNECTED) 15] delete /test
[zk:localhost:2181(CONNECTED) 16] ls /
[node, zookeeper]配置集群
　　再搭建三个同样的虚拟环境，最简单的是直接clone上面的单机，不过要记住重新初始化网卡信息，具体的不再讲怎么操作了，有问题请直接留言。
　　

　　修改zookeeper的参数：

# 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
server.1=192.168.1.156:2888:3888
server.2=192.168.1.158:2888:3888
server.3=192.168.1.159:2888:3888　　

　　端口用途：
2888：集群中服务器的通讯
3888：选领导


具体的测试就不再叙述，在搭建中遇到的问题，请参阅《zookeeper环境搭建中遇到的问题》




参考：http://www.ibm.com/developerworks/cn/opensource/os-cn-zookeeper/#ibm-pcon