ZooKeeper concept and environment deployment. MD

Deploy

• apt-get install openjdk-8-jre
• cd /opt< /li>
• wget http://mirror.bit.edu.cn/apache/zookeeper/stable/zookeeper-3.4.10.tar.gz
• tar -zxvf zookeeper-3.4.10. tar.gz
• mv zookeeper-3.4.10 zookeeper
• cd zookeeper/conf/
• cp zoo_sample.cfg zoo.cfg
• mkdir /var/zookeeper
• Modify zoo.cfg (stand-alone)
  
  

  dataDir=/var/zookeeper

• < p>Increase environment variables

  vi ~/.bashrc
  export PATH=/opt/zookeeper/bin:$PATH
  source ~/.bashrc

• Start

  zkServer.sh start

• Status

  < blockquote>

  zkServer.sh status

• Access

  zkCli.sh -server 127.0.0.1:2181

[zk: 127.0.0.1:2181(CONNECTED) 1] ls[zk: 127.0.0.1:2181(CONNECTED) 2] create /k1 v1Created /k1[zk: 127.0.0.1:2181(CONNECTED) 3] get /k1v1cZxid = 0x2ctime = Sat Oct 14 19:05:40 CST 2017mZxid = 0x2mtime = Sat Oct 14 19:05:40 CST 2017pZxid = 0x2cversion = 0dataVersion = 0aclVersion = 0ephemeralOwner = 0x0dataLength = 2numChildren = 0

Other

< li>As long as more than half of the nodes can be accessed, the cluster is normal
• var/zookeeper/zookeeper_server.out View error log