#系统:centos6.5	64位#JDK:1.7.0_79#Hadoop:2.4.0 	64位#注：（配置网络，首先配置好一台主机，另外的克隆主机即可）

一、安装SSH

yum install openssh

二、关闭防火墙

chkconfig iptables offsudo gedit /etc/selinux/config  # 改为 SELINUX=disabled

三、修改hosts文件

sudo gedit /etc/hosts

把里面所有的内容使用#注释掉，然后添加主机的ip和主机名

192.168.10.110		Master192.168.10.111		Slave1192.168.10.112		Slave2

四、设置免密码登陆

ssh-keygen -t rsa		#一路空格```					切换到ssh的目录

cd /root/.ssh cat id_rsa.pub >> authorized_keys

测试是否可以免密码登陆

ssh Master

五、配置JDK把JDK 解压到 /usr/java/ 目录下配置JDK的环境变量

sudo gedit /etc/profile #在最后一行增加以下内容： JAVA_HOME=/usr/java/jdk1.7.0_79 JRE_HOME=/usr/java/jdk1.7.0_79/jre PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin CLASSPATH=:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib

五、配置Hadoop解压Hadoop-2.4.0到 /usr/java 的目录下需要配置文件：core-site.xml、hdfs-site.xml、mapred-site.xml、yarn-site.xml、hadoop-env.sh、yarn-env.sh、slaves。1、core-site.xml

<configuration> <property> <name>fs.defaultFS</name> <value>hdfs://Master:9000</value> <description>默认HDFS的路径</description> <final>true</final> </property> <property> <name>hadoop.tmp.dir</name> <value>/usr/java/hadoop-2.4.0/tmp</value> <description>临时文件夹路径</description> </property> <property> <name>io.file.buffer.size</name> <value>131072</value> <description>缓冲区的大小:io.file.buffer.size 默认4KB</description> </property> <property> <name>hadoop.proxyuser.hduser.hosts</name> <value>*</value> </property> <property> <name>hadoop.proxyuser.hduser.groups</name> <value>*</value> </property> </configuration>

2、hdfs-site.xml

<configuration> <property> <name>dfs.namenode.secondary.http-address</name> <value>Master:9001</value> </property> <property> <name>dfs.namenode.name.dir</name> <value>file:/usr/java/hadoop-2.4.0/dfs/namenode</value> </property> <property> <name>dfs.datanode.data.dir</name> <value>file:/usr/java/hadoop-2.4.0/dfs/datanode</value> </property> <property> <name>dfs.replication</name> <value>3</value> </property> <property> <name>dfs.webhdfs.enabled</name> <value>true</value> </property> </configuration>

3、mapred-site.xml

<configuration> <property> <name>mapreduce.framework.name</name> <value>yarn</value> <description>Execution framework set to Hadoop YARN.</description> </property> <property> <name>mapreduce.jobhistory.address</name> <value>Master:10020</value> </property> <property> <name>mapreduce.jobhistory.webapp.address</name> <value>Master:19888</value> </property> </configuration>

4、yarn-site.xml

<configuration> <property> <name>yarn.nodemanager.aux-services</name> <value>mapreduce_shuffle</value> </property> <property> <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name> <value>org.apache.hadoop.mapred.ShuffleHandler</value> </property> <property> <name>yarn.resourcemanager.address</name> <value>Master:8032</value> <description>The address of the applications manager interface in the RM.</description> </property> <property> <name>yarn.resourcemanager.scheduler.address</name> <value>Master:8030</value> <description>The address of the scheduler interface,in order for the RM to obtain the resource from scheduler</description> </property> <property> <name>yarn.resourcemanager.resource-tracker.address</name> <value>Master:8031</value> <description>The address of the resource tracker interface for the nodeManagers</description> </property> <property> <name>yarn.resourcemanager.admin.address</name> <value>Master:8033</value> <description>The address for admin manager</description> </property> <property> <name>yarn.resourcemanager.webapp.address</name> <value>Master:8088</value> <description>The address of the RM web application.</description> </property>

</configuration>

5、hadoop-env.sh     （增加JDK的安装目录）

export JAVA_HOME=/usr/java/jdk1.7.0_79

6、yarn-env.sh     （增加JDK的安装目录）

export JAVA_HOME=/usr/java/jdk1.7.0_79

7、slaves

Slave1 Slave2

六、配置Hadoop的环境变量

sudo gedit /etc/profile

set hadoop path

export HADOOP_HOME=/usr/hadoop export PATH=$PATH :$HADOOP_HOME/bin

七、克隆两台虚拟机，配置好网络。192.168.10.111   192.168.10.112八、互相ping ip地址,看是否可以ping通。互相 ssh ip地址，看是否可以免密码登陆。九、回到Master的主机，切换到Hadoop的目录下执行

[hadoop@Master hadoop]$ bin/hadoop namenode -format [hadoop@Master hadoop]$ bin/start-all.sh

十、打开浏览器，输入 192.168.10.110:50075看是否有两个节点。