在Ubuntu上搭建Zookeeper集群

新建data文件夹

cd /usr/local/zookeeper/
mkdir data

分别设定在各主机使用一个命令表示id

这里直接在各个主机分别输入（echo "1" > /usr/local/zookeeper/data/myid    中的1是第一台主机，其余的主机往后递增）

echo "1" > /usr/local/zookeeper/data/myid

测试：

1.启动ZooKeeper

在各个主机都输入：

cd /usr/local/zookeeper/bin/
./zkServer.sh start

显示如下

ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

2查看状态

在各个主机都输入：

./zkServer.sh status

观察各个主机的Mode显示有一台主机是leader和多台主机是follower就是成功了

检测是否成功启动，在客户端连接下服务端

./zkCli.sh -server slave1:2181

显示如下：

Connecting to slave1:2181
2020-10-17 01:51:39,229 [myid:] - INFO  [main:Environment@109] - Client environment:zookeeper.version=3.5.8-f439ca583e70862c3068a1f2a7d4d068eec33315, built on 05/04/2020 15:07 GMT
2020-10-17 01:51:39,233 [myid:] - INFO  [main:Environment@109] - Client environment:host.name=master
2020-10-17 01:51:39,233 [myid:] - INFO  [main:Environment@109] - Client environment:java.version=1.8.0_265
2020-10-17 01:51:39,236 [myid:] - INFO  [main:Environment@109] - Client environment:java.vendor=Private Build
2020-10-17 01:51:39,236 [myid:] - INFO  [main:Environment@109] - Client environment:java.home=/usr/lib/jvm/java-8-openjdk-amd64/jre
2020-10-17 01:51:39,236 [myid:] - INFO  [main:Environment@109] - Client environment:java.class.path=/usr/local/zookeeper/bin/../zookeeper-server/target/classes:/usr/local/zookeeper/bin/../build/classes:/usr/local/zookeeper/bin/../zookeeper-server/target/lib/*.jar:/usr/local/zookeeper/bin/../build/lib/*.jar:/usr/local/zookeeper/bin/../lib/zookeeper-jute-3.5.8.jar:/usr/local/zookeeper/bin/../lib/zookeeper-3.5.8.jar:/usr/local/zookeeper/bin/../lib/slf4j-log4j12-1.7.25.jar:/usr/local/zookeeper/bin/../lib/slf4j-api-1.7.25.jar:/usr/local/zookeeper/bin/../lib/netty-transport-native-unix-common-4.1.48.Final.jar:/usr/local/zookeeper/bin/../lib/netty-transport-native-epoll-4.1.48.Final.jar:/usr/local/zookeeper/bin/../lib/netty-transport-4.1.48.Final.jar:/usr/local/zookeeper/bin/../lib/netty-resolver-4.1.48.Final.jar:/usr/local/zookeeper/bin/../lib/netty-handler-4.1.48.Final.jar:/usr/local/zookeeper/bin/../lib/netty-common-4.1.48.Final.jar:/usr/local/zookeeper/bin/../lib/netty-codec-4.1.48.Final.jar:/usr/local/zookeeper/bin/../lib/netty-buffer-4.1.48.Final.jar:/usr/local/zookeeper/bin/../lib/log4j-1.2.17.jar:/usr/local/zookeeper/bin/../lib/json-simple-1.1.1.jar:/usr/local/zookeeper/bin/../lib/jline-2.11.jar:/usr/local/zookeeper/bin/../lib/jetty-util-9.4.24.v20191120.jar:/usr/local/zookeeper/bin/../lib/jetty-servlet-9.4.24.v20191120.jar:/usr/local/zookeeper/bin/../lib/jetty-server-9.4.24.v20191120.jar:/usr/local/zookeeper/bin/../lib/jetty-security-9.4.24.v20191120.jar:/usr/local/zookeeper/bin/../lib/jetty-io-9.4.24.v20191120.jar:/usr/local/zookeeper/bin/../lib/jetty-http-9.4.24.v20191120.jar:/usr/local/zookeeper/bin/../lib/javax.servlet-api-3.1.0.jar:/usr/local/zookeeper/bin/../lib/jackson-databind-2.10.3.jar:/usr/local/zookeeper/bin/../lib/jackson-core-2.10.3.jar:/usr/local/zookeeper/bin/../lib/jackson-annotations-2.10.3.jar:/usr/local/zookeeper/bin/../lib/commons-cli-1.2.jar:/usr/local/zookeeper/bin/../lib/audience-annotations-0.5.0.jar:/usr/local/zookeeper/bin/../zookeeper-*.jar:/usr/local/zookeeper/bin/../zookeeper-server/src/main/resources/lib/*.jar:/usr/local/zookeeper/bin/../conf:.:/usr/share/java/jdk1.8.0_261/lib:/lib
2020-10-17 01:51:39,236 [myid:] - INFO  [main:Environment@109] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib
2020-10-17 01:51:39,237 [myid:] - INFO  [main:Environment@109] - Client environment:java.io.tmpdir=/tmp
2020-10-17 01:51:39,237 [myid:] - INFO  [main:Environment@109] - Client environment:java.compiler=<NA>
2020-10-17 01:51:39,237 [myid:] - INFO  [main:Environment@109] - Client environment:os.name=Linux
2020-10-17 01:51:39,237 [myid:] - INFO  [main:Environment@109] - Client environment:os.arch=amd64
2020-10-17 01:51:39,237 [myid:] - INFO  [main:Environment@109] - Client environment:os.version=4.15.0-120-generic
2020-10-17 01:51:39,237 [myid:] - INFO  [main:Environment@109] - Client environment:user.name=hadoop
2020-10-17 01:51:39,237 [myid:] - INFO  [main:Environment@109] - Client environment:user.home=/home/hadoop
2020-10-17 01:51:39,237 [myid:] - INFO  [main:Environment@109] - Client environment:user.dir=/usr/local/zookeeper/bin
2020-10-17 01:51:39,238 [myid:] - INFO  [main:Environment@109] - Client environment:os.memory.free=25MB
2020-10-17 01:51:39,239 [myid:] - INFO  [main:Environment@109] - Client environment:os.memory.max=228MB
2020-10-17 01:51:39,239 [myid:] - INFO  [main:Environment@109] - Client environment:os.memory.total=31MB
2020-10-17 01:51:39,242 [myid:] - INFO  [main:ZooKeeper@868] - Initiating client connection, connectString=slave1:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@726f3b58
2020-10-17 01:51:39,249 [myid:] - INFO  [main:X509Util@79] - Setting -D jdk.tls.rejectClientInitiatedRenegotiation=true to disable client-initiated TLS renegotiation
2020-10-17 01:51:39,259 [myid:] - INFO  [main:ClientCnxnSocket@237] - jute.maxbuffer value is 4194304 Bytes
2020-10-17 01:51:39,268 [myid:] - INFO  [main:ClientCnxn@1653] - zookeeper.request.timeout value is 0. feature enabled=
Welcome to ZooKeeper!
2020-10-17 01:51:39,386 [myid:slave1:2181] - INFO  [main-SendThread(slave1:2181):ClientCnxn$SendThread@1112] - Opening socket connection to server slave1/192.168.58.129:2181. Will not attempt to authenticate using SASL (unknown error)
JLine support is enabled
2020-10-17 01:51:39,570 [myid:slave1:2181] - INFO  [main-SendThread(slave1:2181):ClientCnxn$SendThread@959] - Socket connection established, initiating session, client: /192.168.58.128:48134, server: slave1/192.168.58.129:2181
2020-10-17 01:51:39,748 [myid:slave1:2181] - INFO  [main-SendThread(slave1:2181):ClientCnxn$SendThread@1394] - Session establishment complete on server slave1/192.168.58.129:2181, sessionid = 0x200005f99630000, negotiated timeout = 30000

WATCHER::

WatchedEvent state:SyncConnected type:None path:null
[zk: slave1:2181(CONNECTED) 0]

现在就可以通过客户端执行基本命令 ls /

[zk: slave2:2181(CONNECTED) 0] create /test 111
Created /test
[zk: slave2:2181(CONNECTED) 1] ls /
[test, zookeeper]
[zk: slave2:2181(CONNECTED) 2] get /test
111

验证数据是否同步

[zk: slave1:2181(CONNECTED) 0] get /test
111
[zk: slave1:2181(CONNECTED) 1] 

通过验证可以看出 在服务slave2上创建的节点，在slave1上也可以获取到，说明集群部署是OK的.

配置环境变量（进入管理员）（在每台主机上执行相同的操作）

su
vim /etc/profile

在最后添加：

export ZOOKEEPER_HOME=/usr/local/zookeeper
export PATH=$PATH:$ZOOKEEPER_HOME/bin

保存退出（:wq!）