基于centos6的Hadoop2.6.5准备与安装

下载需要用到的包

• 下载hadoop的binary包
  wget http://mirrors.tuna.tsinghua.edu.cn/apache/hadoop/common/hadoop-2.6.5/hadoop-2.6.5.tar.gz

• 下载oracleJdk jdk-7u79-linux-x64.tar.gz (jdk1.7.0_79)

• 查看hadoop与jdk的对应版本 http://wiki.apache.org/hadoop/HadoopJavaVersions

开始安装过程

1、卸载centos6自带的openjdk

$rpm -qa|grep java
$yum remove java-1.7.0-openjdk-1.7.0.79-2.5.5.4.el6.x86_64
$yum remove java-1.6.0-openjdk-1.6.0.35-1.13.7.1.el6_6.x86_64
$yum remove tzdata-java-2015e-1.el6.noarch

1.1、安装oracleJdk

$mkdir /usr/local/java
$cp jdk-7u79-linux-x64.tar.gz /usr/local/java
$tar zxvf jdk-7u79-linux-x64.tar.gz

1.2、配置java环境变量

$vi /etc/profile
export JAVA_HOME=/usr/local/java/jdk1.7.0_79
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$JAVA_HOME/bin:$PATH

$source /etc/profile
$java -version

2、ssh

centos自带或 yum install ssh

3、rsync

yum install rsync

4、创建用户和组

$groupadd hadoop
$useradd -g hadoop hduser
$id hduser

5、配置hduser用户的ssh无密码登录

$su hduser
$ssh-keygen -t rsa
$cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

6、解压

$mkdir /usr/local/hadoop
$chown -R hduser:hadoop /usr/local/hadoop
$cp hadoop-2.6.5.tar.gz /usr/local/hadoop/
$chown hduser:hadoop hadoop-2.6.5.tar.gz
$su hduser
$tar zxvf hadoop-2.6.5.tar.gz

7、配置hadoop环境变量

$vi /etc/profile
export HADOOP_PREFIX=/usr/local/hadoop/hadoop-2.6.5
export PATH=$PATH:$HADOOP_PREFIX/bin
$source /etc/profile

vim /usr/local/hadoop/hadoop-2.6.5/etc/hadoop-env.sh #这里也再要配置HADOOP_PREFIX和JAVA_HOME

8、测试是否安装成功

$hadoop
$./sbin/start-yarn.sh
$./sbin/stop-yarn.sh
访问http://localhost:8088