1. What is the zookeeper?
Official website: ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services .
Coordination of services is a simple point is zookeeper distributed services
zookeeper manage distributed services
zookeeper's design goals: easy to use, reusability, fast ..
For details, please see the official document: http: //zookeeper.apache.org/doc/current/zookeeperOver.html
2. Installation standalone mode
1) to view the conf directory there is a zoo_sample.cfg, he will change into a zoo.cfg
mv ./zoo_sample.cfg ./zoo.cfg
2) Edit zoo.cfg
# Basic time unit interaction between the server and the client (ms)
tickTime=2000
# Save the zookeeper data
dataDir = / home / java / apache-zookeeper-3.5.5 / data (their specified directory)
The number of clients # zookeeper acceptable
initLimit = 5
# Between server and client requests and response time interval
syncLimit=2
# Client and interact with one another zookeeper port
clientPort = 2181
server1=master:2888:3888
Explanation:
We only started on a single machine
3) You can configure environment variables zookeeper
vim /etc/profile
#zookeeper
export ZOOKEEPER=/home/hadoop/zookeeper-3.4.10
export PATH=$PATH:$ZOOKEEPER/bin
Refresh variables
source /etc/profile
4) Start zookeeper
Came to the bin directory
Execution ./zkServer.sh start
See how it works with the jps command java program
The program found no zookeeper
来到目录的logs目录下查看日志
在zookeeper根目录下执行mvn install -DskipTests
再次执行./zkServer.sh start
3.连接zookeeper
目录下执行bin/zkCli.sh
简单的体验一下zookeeper
