1. Install and prepare a virtual machine (vmware, VirtualBox).

2. Use the connection tool to connect (Xshell, electerm and other tools, the electerm tool I use).

use

ip address

or

ip addr

To view the virtual machine address. If you are using a local area network, you need to set a bridging network and copy the physical address. If it is a local virtual machine, you don't need to.

Connect using the connection tool (electerm)

If you see it, the following interface indicates that the connection is successful.

3. Download zookeeper

zookeeper official download address

The 3.6.3 of zookeeper I downloaded here is connected as follows

apache-zookeeper-3.6.3

4. Build environment

Switch to the opt directory

cd /opt

Create the modules directory and the software directory (parent-child relationship, or save it directly to opt without creating it. I made a classification).

mkdir -p /opt/modules/software

Check whether the creation is successful (if not, this step can be omitted)

ls

5. Upload zookeeper file

  6. Unzip the zookeeper package

Switch to software

cd ./modules/software

Check to see if the zookeeper package exists

ls

If it does not exist, it may be uploaded to another path or the upload failed.

Unzip the zookeeper compressed file to / opt/modules

tar -zxvf apache-zookeeper-3.6.3-bin.tar.gz -C /opt/modules/

If there are no errors, the decompression is successful.

7. Deployment and operation

Switch to the installation path of zookeeper

cd /opt/modules

Modify the name of the zookeeper file (the name is too long for easy operation and can not be modified)

mv apache-zookeeper-3.6.3-bin/ zookeeper3.6.3

Switch to the configuration directory of zookeeper

cd zookeeper3.6.3/conf/

Create a data folder

mkdir /opt/modules/zookeeper3.6.3/data

Copy a zoo_sample.cfg configuration file and change its name to zoo_cfg

cp zoo_sample.cfg zoo.cfg

Modify zoo_cfg configuration

vi zoo.cfg

or

vim zoo.cfg

If you use VIM to report centos vim command not found, you can try installing vim

yum install -y vim

Edit again

Modified configuration (optional, or keep the default value)

tickTime = 2000
# Data storage location of zookeeper (recommended modification)
dataDir = /opt/zookeeper3.6.3/data
clientPort = 2181
initLimit = 5
syncLimit = 2

If the current directory is the zookeeper installation directory, you can use the

pwd

Modify after obtaining

Press ESC - > Press Shift +: key in English or half angle status, and enter wq! Exit editing.

Run zookeeper

/opt/modules/zookeeper3.6.3/bin/zkServer.sh start

If you see the following results, the operation is successful

  Connection test via zkCli

/opt/modules/zookeeper3.6.3/bin/zkCli.sh

The following characters will be output

/usr/bin/java
Connecting to localhost:2181
2021-09-29 09:41:25,479 [myid:] - INFO  [main:Environment@98] - Client environment:zookeeper.version=3.6.3--6401e4ad2087061bc6b9f80dec2d69f2e3c8660a, built on 04/08/2021 16:35 GMT
2021-09-29 09:41:25,546 [myid:] - INFO  [main:Environment@98] - Client environment:host.name=zookeeper-standlone
2021-09-29 09:41:25,546 [myid:] - INFO  [main:Environment@98] - Client environment:java.version=1.8.0_302
2021-09-29 09:41:25,548 [myid:] - INFO  [main:Environment@98] - Client environment:java.vendor=Red Hat, Inc.
2021-09-29 09:41:25,548 [myid:] - INFO  [main:Environment@98] - Client environment:java.home=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.302.b08-0.el7_9.x86_64/jre
2021-09-29 09:41:25,548 [myid:] - INFO  [main:Environment@98] - Client environment:java.class.path=/opt/modules/zookeeper3.6.3/bin/../zookeeper-server/target/classes:/opt/modules/zookeeper3.6.3/bin/../build/classes:/opt/modules/zookeeper3.6.3/bin/../zookeeper-server/target/lib/*.jar:/opt/modules/zookeeper3.6.3/bin/../build/lib/*.jar:/opt/modules/zookeeper3.6.3/bin/../lib/zookeeper-prometheus-metrics-3.6.3.jar:/opt/modules/zookeeper3.6.3/bin/../lib/zookeeper-jute-3.6.3.jar:/opt/modules/zookeeper3.6.3/bin/../lib/zookeeper-3.6.3.jar:/opt/modules/zookeeper3.6.3/bin/../lib/snappy-java-1.1.7.jar:/opt/modules/zookeeper3.6.3/bin/../lib/slf4j-log4j12-1.7.25.jar:/opt/modules/zookeeper3.6.3/bin/../lib/slf4j-api-1.7.25.jar:/opt/modules/zookeeper3.6.3/bin/../lib/simpleclient_servlet-0.6.0.jar:/opt/modules/zookeeper3.6.3/bin/../lib/simpleclient_hotspot-0.6.0.jar:/opt/modules/zookeeper3.6.3/bin/../lib/simpleclient_common-0.6.0.jar:/opt/modules/zookeeper3.6.3/bin/../lib/simpleclient-0.6.0.jar:/opt/modules/zookeeper3.6.3/bin/../lib/netty-transport-native-unix-common-4.1.63.Final.jar:/opt/modules/zookeeper3.6.3/bin/../lib/netty-transport-native-epoll-4.1.63.Final.jar:/opt/modules/zookeeper3.6.3/bin/../lib/netty-transport-4.1.63.Final.jar:/opt/modules/zookeeper3.6.3/bin/../lib/netty-resolver-4.1.63.Final.jar:/opt/modules/zookeeper3.6.3/bin/../lib/netty-handler-4.1.63.Final.jar:/opt/modules/zookeeper3.6.3/bin/../lib/netty-common-4.1.63.Final.jar:/opt/modules/zookeeper3.6.3/bin/../lib/netty-codec-4.1.63.Final.jar:/opt/modules/zookeeper3.6.3/bin/../lib/netty-buffer-4.1.63.Final.jar:/opt/modules/zookeeper3.6.3/bin/../lib/metrics-core-3.2.5.jar:/opt/modules/zookeeper3.6.3/bin/../lib/log4j-1.2.17.jar:/opt/modules/zookeeper3.6.3/bin/../lib/json-simple-1.1.1.jar:/opt/modules/zookeeper3.6.3/bin/../lib/jline-2.14.6.jar:/opt/modules/zookeeper3.6.3/bin/../lib/jetty-util-ajax-9.4.39.v20210325.jar:/opt/modules/zookeeper3.6.3/bin/../lib/jetty-util-9.4.39.v20210325.jar:/opt/modules/zookeeper3.6.3/bin/../lib/jetty-servlet-9.4.39.v20210325.jar:/opt/modules/zookeeper3.6.3/bin/../lib/jetty-server-9.4.39.v20210325.jar:/opt/modules/zookeeper3.6.3/bin/../lib/jetty-security-9.4.39.v20210325.jar:/opt/modules/zookeeper3.6.3/bin/../lib/jetty-io-9.4.39.v20210325.jar:/opt/modules/zookeeper3.6.3/bin/../lib/jetty-http-9.4.39.v20210325.jar:/opt/modules/zookeeper3.6.3/bin/../lib/javax.servlet-api-3.1.0.jar:/opt/modules/zookeeper3.6.3/bin/../lib/jackson-databind-2.10.5.1.jar:/opt/modules/zookeeper3.6.3/bin/../lib/jackson-core-2.10.5.jar:/opt/modules/zookeeper3.6.3/bin/../lib/jackson-annotations-2.10.5.jar:/opt/modules/zookeeper3.6.3/bin/../lib/commons-cli-1.2.jar:/opt/modules/zookeeper3.6.3/bin/../lib/audience-annotations-0.5.0.jar:/opt/modules/zookeeper3.6.3/bin/../zookeeper-*.jar:/opt/modules/zookeeper3.6.3/bin/../zookeeper-server/src/main/resources/lib/*.jar:/opt/modules/zookeeper3.6.3/bin/../conf:
2021-09-29 09:41:25,549 [myid:] - INFO  [main:Environment@98] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2021-09-29 09:41:25,549 [myid:] - INFO  [main:Environment@98] - Client environment:java.io.tmpdir=/tmp
2021-09-29 09:41:25,549 [myid:] - INFO  [main:Environment@98] - Client environment:java.compiler=<NA>
2021-09-29 09:41:25,549 [myid:] - INFO  [main:Environment@98] - Client environment:os.name=Linux
2021-09-29 09:41:25,549 [myid:] - INFO  [main:Environment@98] - Client environment:os.arch=amd64
2021-09-29 09:41:25,549 [myid:] - INFO  [main:Environment@98] - Client environment:os.version=3.10.0-1160.42.2.el7.x86_64
2021-09-29 09:41:25,549 [myid:] - INFO  [main:Environment@98] - Client environment:user.name=root
2021-09-29 09:41:25,549 [myid:] - INFO  [main:Environment@98] - Client environment:user.home=/root
2021-09-29 09:41:25,549 [myid:] - INFO  [main:Environment@98] - Client environment:user.dir=/opt/modules/zookeeper3.6.3/conf
2021-09-29 09:41:25,549 [myid:] - INFO  [main:Environment@98] - Client environment:os.memory.free=23MB
2021-09-29 09:41:25,551 [myid:] - INFO  [main:Environment@98] - Client environment:os.memory.max=228MB
2021-09-29 09:41:25,551 [myid:] - INFO  [main:Environment@98] - Client environment:os.memory.total=29MB
2021-09-29 09:41:25,556 [myid:] - INFO  [main:ZooKeeper@1006] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@379619aa
2021-09-29 09:41:25,559 [myid:] - INFO  [main:X509Util@77] - Setting -D jdk.tls.rejectClientInitiatedRenegotiation=true to disable client-initiated TLS renegotiation
2021-09-29 09:41:25,566 [myid:] - INFO  [main:ClientCnxnSocket@239] - jute.maxbuffer value is 1048575 Bytes
2021-09-29 09:41:25,573 [myid:] - INFO  [main:ClientCnxn@1736] - zookeeper.request.timeout value is 0. feature enabled=false
Welcome to ZooKeeper!
2021-09-29 09:41:25,588 [myid:localhost:2181] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1181] - Opening socket connection to server localhost/127.0.0.1:2181.
2021-09-29 09:41:25,588 [myid:localhost:2181] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1183] - SASL config status: Will not attempt to authenticate using SASL (unknown error)
JLine support is enabled
2021-09-29 09:41:25,662 [myid:localhost:2181] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1013] - Socket connection established, initiating session, client: /127.0.0.1:52286, server: localhost/127.0.0.1:2181
2021-09-29 09:41:25,699 [myid:localhost:2181] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1448] - Session establishment complete on server localhost/127.0.0.1:2181, session id = 0x100003ad51e0000, negotiated timeout = 30000

WATCHER::

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

Congratulations, zookeeper single node deployment is successful.

How to stop the zookeeper single node service?

Exit zkCli

quit

Stop zookeeper service

/opt/modules/zookeeper3.6.3/bin/zkServer.sh stop

If you see the following results, the stop is successful.

  So far, the deployment of zookeeper single node in Centos7 has been completed. If this article helps you, please give me a like. Thank you.