zookeeper伪分布式集群搭建

1.linux安装包

导入zookeeper-3.4.11.tar.gz 到opt目录下

2.进入到opt目录下 cd /opt

3.解压tar -zxvf zookeeper-3.4.11.tar.gz

4.在opt下创建一个文件夹myzookeeper

5.将解压后的文件拷贝到myzookeeper文件夹中，rf为递归拷贝 cp -rf zookeeper-3.4.11 /opt/myzookeeper/

6.进入到conf 目录下cd zookeeper-3.4.11/conf ，cp zoo_sample.cfg zoo.cfg 拷贝配置文件，养成习惯。

6.启动进入到拷贝后的文件夹下的bin目录下，cd /opt/myzookeeper/zookeeper-3.4.11/bin

7.执行启动命令 ll 查询所有的可执行文件，这里需要启动服务 ./zkServer.sh start（注意前面的./）

8.看启动是否成功 echo ruok | nc 127.0.0.1 2181 （这个zookeeper的默认端口为2181），若回应为imok，则为启动成功

(也可查看状态./zkServer.sh status)

9.客户端连接 ./zkCli.sh（注意前面的./）

[root@liuyuan bin]# ./zkCli.sh
Connecting to localhost:2181
2019-08-03 20:01:53,970 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0, built on 11/01/2017 18:06 GMT
2019-08-03 20:01:53,982 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=liuyuan
2019-08-03 20:01:53,982 [myid:] - INFO  [main:Environment@100] - Client environment:java.version=1.8.0_131
2019-08-03 20:01:53,997 [myid:] - INFO  [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
2019-08-03 20:01:53,998 [myid:] - INFO  [main:Environment@100] - Client environment:java.home=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.131-11.b12.el7.x86_64/jre
2019-08-03 20:01:53,998 [myid:] - INFO  [main:Environment@100] - Client environment:java.class.path=/opt/myzookeeper/zookeeper-3.4.11/bin/../build/classes:/opt/myzookeeper/zookeeper-3.4.11/bin/../build/lib/*.jar:/opt/myzookeeper/zookeeper-3.4.11/bin/../lib/slf4j-log4j12-1.6.1.jar:/opt/myzookeeper/zookeeper-3.4.11/bin/../lib/slf4j-api-1.6.1.jar:/opt/myzookeeper/zookeeper-3.4.11/bin/../lib/netty-3.10.5.Final.jar:/opt/myzookeeper/zookeeper-3.4.11/bin/../lib/log4j-1.2.16.jar:/opt/myzookeeper/zookeeper-3.4.11/bin/../lib/jline-0.9.94.jar:/opt/myzookeeper/zookeeper-3.4.11/bin/../lib/audience-annotations-0.5.0.jar:/opt/myzookeeper/zookeeper-3.4.11/bin/../zookeeper-3.4.11.jar:/opt/myzookeeper/zookeeper-3.4.11/bin/../src/java/lib/*.jar:/opt/myzookeeper/zookeeper-3.4.11/bin/../conf:
2019-08-03 20:01:53,998 [myid:] - INFO  [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2019-08-03 20:01:53,998 [myid:] - INFO  [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2019-08-03 20:01:53,999 [myid:] - INFO  [main:Environment@100] - Client environment:java.compiler=
2019-08-03 20:01:53,999 [myid:] - INFO  [main:Environment@100] - Client environment:os.name=Linux
2019-08-03 20:01:53,999 [myid:] - INFO  [main:Environment@100] - Client environment:os.arch=amd64
2019-08-03 20:01:53,999 [myid:] - INFO  [main:Environment@100] - Client environment:os.version=3.10.0-693.el7.x86_64
2019-08-03 20:01:54,000 [myid:] - INFO  [main:Environment@100] - Client environment:user.name=root
2019-08-03 20:01:54,000 [myid:] - INFO  [main:Environment@100] - Client environment:user.home=/root
2019-08-03 20:01:54,000 [myid:] - INFO  [main:Environment@100] - Client environment:user.dir=/opt/myzookeeper/zookeeper-3.4.11/bin
2019-08-03 20:01:54,008 [myid:] - INFO  [main:ZooKeeper@441] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@42110406
Welcome to ZooKeeper!
2019-08-03 20:01:54,072 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1035] - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
JLine support is enabled
2019-08-03 20:01:54,155 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@877] - Socket connection established to localhost/127.0.0.1:2181, initiating session
2019-08-03 20:01:54,185 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1302] - Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x100001903b00000, negotiated timeout = 30000

WATCHER::

WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0]

10.退出quit

11.接下来操作一下

创建节点，节点由path+data+stat组成

rmr递归删除，delete为普通删除，路径下面不能嵌套路径

这是单机的接下来是集群版的，这里配置了三台服务器

这个和redis集群是有区别的，形式是主从形式，不过实现的效果却是集群的，所以从效果来讲，这属于集群，实际上也是这么叫的，这个会对第一台zookeeper服务作为Leader，也就是master 之后的所有服务器为从服务器Follower,也就是slave（貌似人权原因，这个名字不太好），zookeeper中不论主还是从都保持有所有的数据的，这点和redis集群有区别，

redis集群所有的主或者所有的从服务器共同组成了所有的数据，并且zookeeper主要是管理服务的，不存在并发问题。而redis则不同。

1.递归拷贝

zookeeper-3.4.9.tar.gz解压后拷贝到/myzookeeper目录下并重新名为zk01，再复制zk01形成zk02、zk03，共计3份

2.进入zk01/02/03分别新建文件夹mydata 和mylog

3.编辑zoo.cfg

分别进入zk01-zk03各自的conf文件夹，编辑zoo.cfg

设置自己的数据和log路径

dataDir=/opt/myzookeeper/zk01/mydata

dataLogDir=/opt/myzookeeper/zk01/mylog

# 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/myzookeeper/zk01/mydata
dataLogDir=/opt/myzookeeper/zk01/mylog
# the port at which the clients will connect
clientPort=2191
server.3=127.0.0.1:2993:3993
server.1=127.0.0.1:2991:3991
server.2=127.0.0.1:2992:3992
# 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

以上需要改对应的才可以，这个要特别注意

在各自mydata下面创建myid的文件，在里面写入server的数字

分别启动三个服务器，到对应的解压包下的bin下执行