1、安装JDK
 su grid
 sudo -i
 passwd root

 sudo dpkg -l 
 sudo dpkg -l | grep wget

 cd /usr
 mkdir java

 tar -zxvf eclipse-SDK-4.2-linux-gtk.tar.gz
 cp ~/Desktop/jdk-6u24-linux-i586.bin /usr/java
 ./jdk-6u24-linux-i586.bin

 ln -s /usr/java/jdk-xxx /usr/jdk

 vi /etc/profile 
  JAVA_HOME=/usr/jdk
  CLASSPATH=$JAVA_HOME/lib
  PATH=$PATH:$JAVA_HOME/bin

  export JAVA_HOME CLASSPATH PATH
 source /etc/profile
 
 java -version

2、安装SSH
ssh

1.安装openssh-server
    sudo dpkg -i openssh-client_1%3a5.5p1-4ubuntu6_i386.deb
    sudo dpkg -i openssh-server_1%3a5.5p1-4ubuntu6_i386.deb
   
    如果连网的情况下可以sudo apt-get install openssh-server进行安装
      

2.设置一下ip
    sudo ifconfig eth0 192.168.1.222 netmask 255.255.255.0
   
3. 启动ssh-server。
$ /etc/init.d/ssh restart
service ssh restart
 
4. 确认ssh-server已经正常工作。
$ netstat -tlp
tcp6    0    0 *:ssh                *:*                   LISTEN     -
看到上面这一行输出说明ssh-server已经在运行了。
 
5. 在客户端通过ssh登录服务器。假设服务器的IP地址是192.168.0.103，登录的用户名是hyx。
$ ssh -l hyx 192.168.0.103
接下来会提示输入密码，然后就能成功登录到服务器上了

ssh 192.168.58.133
grid

3、配置hosts
sudo chmod 777 hosts
vi /etc/hosts

192.168.58.131 grid131
192.168.58.132 grid132
192.168.58.133 grid133

C:\Windows\System32\drivers\etc\hosts

4、配置hadoop
hadoop-env.sh
 export JAVA_HOME=/usr/jdk

core-site.xml
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="http://www.mamicode.com/configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>
 <property>
  <name>fs.default.name</name>
  <value>hdfs://grid131:9000</value>
 </property>

 <property>
  <name>hadoop.tmp.dir</name>
  <value>/home/grid/hadoop/tmp</value><!-- 指定零食目录，否则用采用系统的临时目录，而系统的临时目录重启会清空 -->
 </property>

</configuration>

mapred-site.xml
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="http://www.mamicode.com/configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>
 <property>
  <name>mapred.job.tracker</name>
  <value>grid131:9001</value>
 </property>
</configuration>

hdfs-site.xml
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="http://www.mamicode.com/configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>
 <property>
  <name>dfs.replication</name>
  <value>2</value><!-- 复制因子，不能大于slaves配置的节点数 -->
 </property>
</configuration>

masters
grid131   secondNameNode

slaves
grid132   dataNode
grid133   dataNode

5、拷贝hadoop
scp -r  /home/grid/hadoop-1.2.1/ grid132:/home/grid
scp -r  /home/grid/hadoop-1.2.1/ grid133:/home/grid

6、配置SSH免密
ssh-keygen -t rsa
cp id_rsa.pub authorized_keys
scp authorized_keys grid132:/home/grid/.ssh

ssh grid132
cd ~/.ssh
cat id_rsa.pub >> authorized_keys

7、关闭防火墙
centos
 chkconfig iptables off  不重启不会生效：
 service iptables stop  不需要重启

ubuntu
 ufw disable
 sudo iptables -F
 sudo ufw status

8、启动hadoop集群
vi /etc/profile
PATH=$PATH:$JAVA_HOME/bin:/home/grid/hadoop-1.2.1/bin

source /etc/profile

cd ~/hadoop-1.2.1
hadoop namenode -format
start-all.sh

jps

hadoop fs -ls

cd ~
mkdir input
echo ‘hi hadoop‘ > text.txt

hadoop fs -put ~/input/ in33
hadoop fs -ls in33
hadoop fs -cat in33/text.txt

hadoop jar hadoop-examples-1.2.1.jar wordcount in33 out33
hadoop jar WordCount.jar com.test.WordCount input7 output7

http://grid131:50070/dfshealth.jsp

http://grid131:50030/jobtracker.jsp

搭建hadoop1