1 部署环境

os ip name

rhel5-i386 16.158.49.200 hadoop.master

rhel5-i386 16.158.49.201 hadoop.node1

rhel5-i386 16.158.49.202 hadoop.node2

2 修改/etc/hosts(每台)，可以通过机器名互通

hadoop.master:

127.0.0.1 localhost.localdomain localhost

::1 localhost6.localdomain6 localhost6

16.158.49.201 hadoop.node1

16.158.49.202 hadoop.node2

3 添加hadoop用户(每台)

useradd hadoop

密码:

passwd hadoop

4 配置master到nodeX无密码ssh

a su - hadoop

b ssh-keygen -t rsa（hadoop.master），一路回车

c cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

d scp ~/.ssh/authorized_keys hadoop@hadoop.node1:~/.ssh/authorized_keys

scp ~/.ssh/authorized_keys hadoop@hadoop.node2:~/.ssh/authorized_keys

note: 如果没执行过ssh命令，可能会出现~/.ssh不存在的错误，在那台机器上执行一遍就好了。

5 安装jdk(每台)

a 解压缩jdk压缩包到 /usr/java/下面(root)

b vi /etc/profile

增加：

#jdk

JAVA_HOME=/usr/java/jdk1.7.0_45

CLASSPATH=.:$JAVA_HOME/lib.tools.jar

PATH=$JAVA_HOME/bin:$PATH

export JAVA_HOME CLASSPATH PATH

c source /etc/profile

d java -version

java version "1.7.0_45"

Java(TM) SE Runtime Environment (build 1.7.0_45-b18)

Java HotSpot(TM) Server VM (build 24.45-b08, mixed mode)

6 安装hadoop(hadoop用户做以下操作，只在master上操作)

a 解压缩hadoop压缩包到/home/hadoop下面，解压后路径为/home/hadoop/hadoop-2.2.0

b 修改环境变量:

vi ~/.bashrc

增加：

# User specific aliases and functions

#Hadoop variables

export JAVA_HOME=/usr/java/jdk1.7.0_45

export HADOOP_INSTALL=/home/hadoop/hadoop-2.2.0

export HBASE_HOME=/home/hadoop/hbase-0.96.0-hadoop2

export PATH=$PATH:$HADOOP_INSTALL/bin

export PATH=$PATH:$HADOOP_INSTALL/sbin

export PATH=$PATH:$HBASE_HOME/bin

export HADOOP_MAPRED_HOME=$HADOOP_INSTALL

export HADOOP_COMMON_HOME=$HADOOP_INSTALL

export HADOOP_HDFS_HOME=$HADOOP_INSTALL

export YARN_HOME=$HADOOP_INSTALL

###end of paste

c 修改slaves，指定namenode

vi ~/hadoop-2.2.0/etc/hadoop/slaves

hadoop.node1

hadoop.node2

d 修改core-site.xml

e 修改hdfs-site.xml

f 修改mapred-site.xml

g 修改yarn-site.xml

7 创建dfs/name,dfs/data,mapred/local,mapred/system目录

8 scp -r ~/hadoop-2.2.0 hadoop@hadoop.node1:~/hadoop-2.2.0

scp -r ~/hadoop-2.2.0 hadoop@hadoop.node2:~/hadoop-2.2.0

9 以hadoop用户，在hadoop.master上启动hdfs和yarn

hdfs namenode -format

start-dfs.sh

start-yarn.sh

10 jps验证

hadoop.master上

NameNode

SecondaryNameNode

ResourceManager

hadoop.nodeX上

DataNode

NodeManager

ITPub博客

hadoop2.2.0 安装