Hadoop安装与部署

Hadoop安装与部署

Hadoop安装与部署

1.下载hadoop、jdk安装包到hadoop用户家目录

[root@server1 ~]# ls
hadoop-2.7.3.tar.gz  jdk-7u79-linux-x64.tar.gz
[root@server1 ~]# useradd -u 800 hadoop
[root@server1 ~]# id hadoop
uid=800(hadoop) gid=800(hadoop) groups=800(hadoop)
[root@server1 ~]# mv * /home/hadoop/

2.解压配置软链接（方便hadoop、jdk更新，只更改软链接即可）

[root@server1 ~]# su - hadoop
[hadoop@server1 ~]$ ls
hadoop-2.7.3.tar.gz  jdk-7u79-linux-x64.tar.gz
[hadoop@server1 ~]$ tar zxf jdk-7u79-linux-x64.tar.gz 
[hadoop@server1 ~]$ tar zxf hadoop-2.7.3.tar.gz 
[hadoop@server1 ~]$ ls
hadoop-2.7.3  hadoop-2.7.3.tar.gz  jdk1.7.0_79  jdk-7u79-linux-x64.tar.gz
[hadoop@server1 ~]$ ln -s jdk1.7.0_79/ java
[hadoop@server1 ~]$ ln -s hadoop-2.7.3 hadoop

3.配置java环境变量

[hadoop@server1 hadoop]$ pwd
/home/hadoop/hadoop/etc/hadoop
[hadoop@server1 hadoop]$ vim hadoop-env.sh 25 export JAVA_HOME=/home/hadoop/java

4.通过执行hadoop自带实例验证是否安装成功

将input中以dfs开头的文件输出到output目录，其中output目录不必创建

[hadoop@server1 hadoop]$ pwd
/home/hadoop/hadoop
[hadoop@server1 hadoop]$ mkdir input
[hadoop@server1 hadoop]$ cp etc/hadoop/* input/
[hadoop@server1 hadoop]$ bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.3.jar grep input output 'dfs[a-z.]+'   
[hadoop@server1 hadoop]$ cat output/*

示图：output目录中以dfs开头的文件，则安装成功