hadoop集群搭建(ip设置和jdk安装)

刚刚学习hadoop，安装有点吃力，希望通过记录过程能够给遇到同样问题的人一个答案。话不多说直接进入主题。

 

在公司拿来了三台电脑首先安装linux系统，这里不多说细节，唯一注意的ip设置好就可以了。下面介绍我建起hadoop集群的过程(非常详细因为是菜鸟，高手就不用看了)：

 

1.配置ip：

可以写文件，也可以用界面方式安装，这里我用的是setup命令（因为方便），运行setup出现如下界面：

进入Networkconfiguration（可用Tab键切换到run Tool）：

配置eth0网卡(到Use DHCP时按‘空格’即可编写ip地址)：

配置完成后退出；执行

[root@localhost~]# /etc/init.d/network restart

出现如下则说明重启ip成功

Shutting downinterface eth0:  [  OK  ]

Shutting downloopback interface:  [  OK  ]

Bringing uploopback interface:  [  OK  ]

Bringing upinterface eth0:  [  OK  ]

2.安装jdk：

安装jdk1.7版本，这里有点麻烦因为安装linux存在一个java版本为1.4，而hadoop需要最低版本为1.6所以我们要先卸掉原有的java版本：

 

[root@localhostbin]# rpm -qa |grep -i java      查看存在java安装情况

java-1.4.2-gcj-compat-1.4.2.0-40jpp.115

 

[root@localhost bin]# yum removejava-1.4.2-gcj-compat 删除原有的java安装

Loaded plugins: rhnplugin, security

This system is not registered with RHN.

RHN support will be disabled.

Setting up Remove Process

Resolving Dependencies

--> Running transaction check

---> Package java-1.4.2-gcj-compat.i3860:1.4.2.0-40jpp.115 set to be erased

--> Processing Dependency:java-gcj-compat for package: antlr

--> Processing Dependency:java-gcj-compat for package: antlr

--> Processing Dependency:java-gcj-compat >= 1.0.64 for package: gjdoc

--> Processing Dependency:java-gcj-compat >= 1.0.64 for package: gjdoc

--> Running transaction check

---> Package antlr.i386 0:2.7.6-4jpp.2set to be erased

---> Package gjdoc.i386 0:0.7.7-12.el5set to be erased

--> Finished Dependency Resolution

 

Dependencies Resolved

 

================================================================================

 Package                   Arch     Version                 Repository     Size

================================================================================

Removing:

 java-1.4.2-gcj-compat     i386    1.4.2.0-40jpp.115      installed      441

Removing for dependencies:

 antlr                     i386     2.7.6-4jpp.2            installed    2.5 M

 gjdoc                     i386     0.7.7-12.el5            installed     1.7 M

 

Transaction Summary

================================================================================

Remove        3 Package(s)

Reinstall     0 Package(s)

Downgrade     0 Package(s)

 

Is this ok [y/N]: y                #########是否删除级联packages(输入Y)

Downloading Packages:

Running rpm_check_debug

Running Transaction Test

Finished Transaction Test

Transaction Test Succeeded

Running Transaction

 Erasing        : antlr                                                   1/3

 Erasing        : gjdoc                                                   2/3

 Erasing        :java-1.4.2-gcj-compat                                    3/3

 

Removed:

 java-1.4.2-gcj-compat.i386 0:1.4.2.0-40jpp.115                               

 

Dependency Removed:

 antlr.i386 0:2.7.6-4jpp.2             gjdoc.i386 0:0.7.7-12.el5            

 

Complete!      ##########安装完成

 

安装新版本jdk 下载地址

http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u1-download-513651.html

下载完成后：执行

rpm -ivhjdk-7u1-linux-i586.rpm   ###安装jdk

 

等待完成后默认的jdk目录为：

[root@localhostjava]# ll /usr/java/

total 4

lrwxrwxrwx  1 root root  16 Dec  2 00:57 default ->/usr/java/latest

drwxr-xr-x 10root root 4096 Dec  2 00:57 jdk1.7.0_01   ###jdk

lrwxrwxrwx  1 root root  21 Dec  2 00:57 latest ->/usr/java/jdk1.7.0_01

 

如果要删除rpm可以：

[root@localhostjava]# rpm -qa |grep jdk   ###查看jdk包信息

jdk-1.7.0_01-fcs

[root@localhostjava]# rpm -e jdk-1.7.0_01-fcs ###删除jdk

 

查看java版本信息：

         [root@localhostjava]# java -version

java version"1.7.0_01"

Java(TM) SERuntime Environment (build 1.7.0_01-b08)

Java HotSpot(TM)Server VM (build 21.1-b02, mixed mode)

 

[root@localhostjava]# javac -version

javac 1.7.0_01