Summary of common commands for building ZooKeeper3.4 middleware under centos7

1. Download and decompress

1. Introduction to Zookeeper

As a distributed service framework, Zookeeper is mainly used to solve the consistency problem of application systems in distributed clusters. It can provide data storage based on a directory node tree similar to the file system. However, Zookeeper is not used to store data specifically. Its main function is to maintain and monitor the status changes of the data you store. By monitoring the changes in these data states, data-based cluster management can be achieved.

2. Download

Environment Version

centos7
zookeeper 3.4.14

[root@localhost mysoft]$ cd /usr/local/mysoft/
[root@localhost mysoft]$
wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.4.14/zookeeper-3.4.14.tar.gz
[root@localhost mysoft]# tar -zxvf zookeeper-3.4.14.tar.gz
[root@localhost mysoft]# mv zookeeper-3.4.14 zookeeper3.4

2. Modify the configuration file

1. Data and log directories

[root@localhost /]# mkdir -p data/log/zkp1.log
[root@localhost /]# mkdir -p data/zkpdata/zkp1

2. Modify the configuration

[root@localhost mysoft]# cd zookeeper3.4/conf/
[root@localhost conf]# cp zoo_sample.cfg zoo.cfg
[root@localhost conf]# vim zoo.cfg
# Modify the following two contents, the other default dataDir=/data/zkpdata/zkp1
dataLogDir=/data/log/zkp1.log

3. Configuration file description

1) tickTime
The time of the heartbeat check.
2) initLimit
The maximum number of heartbeats (number of tickTimes) that can be tolerated during the initial connection between the slave servers in the cluster and the master server.
3) syncLimit
The maximum number of heartbeats that can be tolerated between requests and responses from the slave server and the master server in the cluster.
4) dataDir
Data storage directory.
5) dataLogDir
Log storage directory.
6) clientPort
The client connection interface, the port that the client connects to the zookeeper server. The server will listen to this port, the default is 2181.

3. Start operation

1. Start the server [root@localhost bin]# pwd
/usr/local/mysoft/zookeeper3.4/bin
[root@localhost bin]# /usr/local/mysoft/zookeeper3.4/bin/zkServer.sh start /usr/local/mysoft/zookeeper3.4/conf/zoo.cfg

ZooKeeper JMX enabled by default
Using config: /usr/local/mysoft/zookeeper3.4/conf/zoo.cfg
Starting zookeeper ... STARTED
[root@localhost bin]# ps -aux |grep zookeeper
2. Start the client [root@localhost /]# cd /usr/local/mysoft/zookeeper3.4/bin/
[root@localhost bin]# ./zkCli.sh 
Connecting to localhost:2181

4. Common operation commands

## Create a node [zk: localhost:2181(CONNECTED) 2] create /cicada cicada-smile1
Created /cicada
[zk: localhost:2181(CONNECTED) 8] create /cicada2 cicada-smile2
Created /cicada2
[zk: localhost:2181(CONNECTED) 4] get /cicada
cicada-smile1
## View the directory [zk: localhost:2181(CONNECTED) 5] ls /
[zookeeper, cicada, cicada2] 
## View the specified directory [zk: localhost:2181(CONNECTED) 17] ls / zookeeper
[com.ptp.user.service.UserService]
## Delete node [zk: localhost:2181(CONNECTED) 10] delete /cicada
## Delete all directories [zk: localhost:2181(CONNECTED) 18] rmr /cicada2
[zk: localhost:2181(CONNECTED) 19] ls /cicada2
Node does not exist: /cicada2
## View the remaining nodes [zk: localhost:2181(CONNECTED) 13] ls /
[zookeeper]

5. Source code address

GitHub address: Zhiyixiao
https://github.com/cicadasmile
Code Cloud Address: Zhilixiao
https://gitee.com/cicadasmile

Summarize

The above is a summary of the common commands for building ZooKeeper3.4 middleware under centos7 introduced by the editor. I hope it will be helpful to everyone. If you have any questions, please leave me a message and the editor will reply to you in time!

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