Hadoop完全分布式配置（测试通过）

网络配置 hosts 防火墙关闭

#vim /etc/hosts
192.168.1.200 master
192.168.1.201 slave1
192.168.1.202 slave2
192.168.1.203 slave3#window hosts文件修改
192.168.1.200 master
192.168.1.201 slave1
192.168.1.202 slave2
192.168.1.203 slave3service iptables stop
chkconfig iptables off

时间同步(NN SNN DN 同步时间)

### s1a.time.du.cn 时间同步服务器
ntpdate s1a.time.du.cn

免密钥设置

ssh-keygen -t rsa&＃xff08;master主机上&＃xff09;
ssh-copy-id -i ~/.ssh/id_rsa.pub root&＃64;master&＃xff08;master主机上&＃xff09;
ssh-copy-id -i ~/.ssh/id_rsa.pub root&＃64;slave1&＃xff08;master主机上&＃xff09;
ssh-copy-id -i ~/.ssh/id_rsa.pub root&＃64;slave2&＃xff08;master主机上&＃xff09;
ssh-copy-id -i ~/.ssh/id_rsa.pub root&＃64;slave3&＃xff08;master主机上&＃xff09;###测试访问
ssh slave1

jdk 配置环境变量

#cd /tmp/
#tar xf hadoop-2.5.1_x64.tar.gz
#mv hadoop-2.5.1 /opt/hadoop
#vim /etc/profile 添加&＃xff08;hadoop环境变量所有机器都需要&＃xff09;
export JAVA_HOME&＃61;/usr/java/default
export PATH&＃61;$PATH:$JAVA_HOME/bin
export HADOOP_HOME&＃61;/opt/hadoop
export PATH&＃61;$PATH:$HADOOP_HOME/bin:$PATH:$HADOOP_HOME/sbin
#source /etc/profile
测试
#echo $JAVA_HOME
#echo $HADOOP_HOME


修改各项配置文件

etc/hadoop/core-site.xml:
fs.defaultFShdfs://master:9000hadoop.tmp.dir/opt/hadoop-tmp
etc/hadoop/hdfs-site.xml:
dfs.replication3dfs.namenode.secondary.http-addressslave1:50090
#vim etc/hadoop/masters--手动创建
slave1#vim etc/hadoop/slaves-手动创建
slave1
slave2
slave3

同步配置文件然后格式化

###同步master机器上hadoop所有配置文件&＃xff08;*&＃xff09;
scp -r /opt/hadoop-2.5.1/ root&＃64;slave1:/opt/
scp -r /opt/hadoop-2.5.1/ root&＃64;slave2:/opt/
scp -r /opt/hadoop-2.5.1/ root&＃64;slave3:/opt/###格式化namenode&＃xff08;master主机上&＃xff09;
hdfs namenode -formatstart-dfs.sh
通过浏览器访问&＃xff1a;http://192.168.1.200:50070