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!）
