Zookeeper复习和安装集群

1.作用，保证分布式环境中数据的一致性

顺序一致性、原子性、单一视图、可靠性、实时性

2.主要就是做数据服务的一致性，实时性

  tar -zxvf 
scp zookeeper-3.4.5.tar.gz 192.168.85.140:/usr/local/software
tar -zxvf zookeeper-3.4.5.tar.gz -C /usr/local/
mv zookeeper-3.4.5 zookeeper


vim /etc/profile


JAVA_HOME=/usr/local/software/jdk1.7
JRE_HOME=/usr/local/software/jdk1.7/jre
ZOOKEEPER_HOME=/usr/local/zookeeper
PATH=$PATH:$JAVA_HOME/bin:$ZOOKEEPER_HOME/bin:$JRE_HOME/bin
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
export JAVA_HOME JRE_HOME PATH CLASSPATH ZOOKEEPER_HOME


source /etc/profile




cd /usr/local/zookeeper/conf
mv zoo_sample.cfg zoo.cfg


vim zoo.cfg
dataDir=/usr/local/zookeeper/data


server.0=192.168.85.138:2888:3888
server.1=192.168.85.139:2888:3888
server.2=192.168.85.140:2888:3888


cd ..
mkdir data
vim myid


zkServer.sh start
zkServer.sh stop
zkServer.sh status
zkServer.sh start-foreground
netstat -anp |grep 2888


报错处理
1.vim /etc/hosts 加入
192.168.85.138 server0
192.168.85.139 server1
192.168.85.140 server2
2.删除data目录下出了myid之外的部相关文件


查询 netstat -ptnl |grep 2181


port 2189