Hadoop部署方式-本地模式(Local (Standalone) Mode)

　　　　　　　　　　　　Hadoop部署方式-本地模式(Local (Standalone) Mode)

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　作者：尹正杰

版权声明：原创作品，谢绝转载！否则将追究法律责任。

　　Hadoop总共有三种运行方式。本地模式（Local (Standalone) Mode），伪分布式（Pseudo-Distributed Mode），分布式（Fully-Distributed Mode）。本篇博客主要讲解第一种运行方式，即本地运行方式，想要查看伪分布式的小伙伴请参考：https://www.cnblogs.com/yinzhengjie/p/9058415.html，想要查看完全分布式的小伙伴请参考：https://www.cnblogs.com/yinzhengjie/p/9065191.html。

　　需要注意的是，本地运行模式，实际上就是用Linux操作系统，会直接把文件存储在Linux路径上，我们在上传文件的时候要注意权限哟，比如你在搭建好Hadoop本地模式后，直接就提交一个文件到根下的话，可能会报权限错误哟，但是，如果你是root用户的话就另当别论了。

一.下载相应的jdk和Hadoop安装包

　　  jdk：http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

　　Hadoop：http://hadoop.apache.org/releases.html

　　注意，Hadoop官方虽然没有windows版本，但是可用通过“visual studio”编译工具将Linux的运行伪分布式迁移到windows中，建议安装2015版本，网上的教程有很多。遗憾的是，这个工具的使用并不是本篇博客的重点。

二.安装Java环境

1>.创建软件解压目录并授权给普通用户

[yinzhengjie@yinzhengjie ~]$ ll
total
-rw-rw-r--.  yinzhengjie yinzhengjie  Aug   hadoop-2.7..tar.gz
-rw-rw-r--.  yinzhengjie yinzhengjie  May   jdk-8u131-linux-x64.tar.gz
[yinzhengjie@yinzhengjie ~]$ sudo mkdir /soft
[sudo] password for yinzhengjie:
[yinzhengjie@yinzhengjie ~]$ sudo chown yinzhengjie:yinzhengjie /soft/
[yinzhengjie@yinzhengjie ~]$ ll /soft/ -d
drwxr-xr-x.  yinzhengjie yinzhengjie  May  : /soft/
[yinzhengjie@yinzhengjie ~]$ 

2>.解压jdk并配置软连接路径

[yinzhengjie@yinzhengjie ~]$ tar zxf jdk-8u131-linux-x64.tar.gz -C /soft/
[yinzhengjie@yinzhengjie ~]$ cd /soft/
[yinzhengjie@yinzhengjie soft]$ ll
total
drwxr-xr-x.  yinzhengjie yinzhengjie  Mar   jdk1..0_131
[yinzhengjie@yinzhengjie soft]$ ln -s jdk1..0_131/ jdk
[yinzhengjie@yinzhengjie soft]$ ll
total
lrwxrwxrwx.  yinzhengjie yinzhengjie  May  : jdk -> jdk1..0_131/
drwxr-xr-x.  yinzhengjie yinzhengjie  Mar   jdk1..0_131
[yinzhengjie@yinzhengjie soft]$ 

3>.设置Java环境变量

[yinzhengjie@yinzhengjie soft]$ sudo vi /etc/profile
[yinzhengjie@yinzhengjie soft]$ tail - /etc/profile
#Add by yinzhengjie
JAVA_HOME=/soft/jdk/
PATH=$PATH:$JAVA_HOME/bin
[yinzhengjie@yinzhengjie soft]$ . /etc/profile
[yinzhengjie@yinzhengjie soft]$
[yinzhengjie@yinzhengjie soft]$ java -version
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) -Bit Server VM (build 25.131-b11, mixed mode)
[yinzhengjie@yinzhengjie soft]$ 

三.安装Hadoop

1>.解压jdk并配置软连接路径

[yinzhengjie@yinzhengjie ~]$ ll
total
-rw-rw-r--.  yinzhengjie yinzhengjie  Aug   hadoop-2.7..tar.gz
-rw-rw-r--.  yinzhengjie yinzhengjie  May   jdk-8u131-linux-x64.tar.gz
[yinzhengjie@yinzhengjie ~]$ tar zxf hadoop-2.7..tar.gz -C /soft/
[yinzhengjie@yinzhengjie ~]$ ln -s /soft/hadoop-2.7./ /soft/hadoop
[yinzhengjie@yinzhengjie ~]$ ll /soft/
total
lrwxrwxrwx.  yinzhengjie yinzhengjie  May  : hadoop -> /soft/hadoop-2.7./
drwxr-xr-x.  yinzhengjie yinzhengjie  Aug   hadoop-2.7.
lrwxrwxrwx.  yinzhengjie yinzhengjie  May  : jdk -> jdk1..0_131/
drwxr-xr-x.  yinzhengjie yinzhengjie  Mar   jdk1..0_131
[yinzhengjie@yinzhengjie ~]$ 

2>.设置Hadoop的环境变量

[yinzhengjie@yinzhengjie ~]$ sudo vi /etc/profile
[sudo] password for yinzhengjie:
[yinzhengjie@yinzhengjie ~]$ tail - /etc/profile
#Add by yinzhengjie
JAVA_HOME=/soft/jdk/
PATH=$PATH:$JAVA_HOME/bin

#Add HADOOP_HOME
HADOOP_HOME=/soft/hadoop/
PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin
[yinzhengjie@yinzhengjie ~]$
[yinzhengjie@yinzhengjie ~]$ source /etc/profile
[yinzhengjie@yinzhengjie ~]$ grep JAVA_HOME /soft/hadoop/etc/hadoop/hadoop-env.sh | grep -v ^#
export JAVA_HOME=/soft/jdk/
[yinzhengjie@yinzhengjie ~]$ 

3>.验证是否安装完毕（注意，提交的目录当前用户需要有权限，因为本地部署不需要启动服务，它用的就是Linux操作系统，如果普通用户把文件直接提交到根的话肯定会报异常的哟！）

[yinzhengjie@yinzhengjie ~]$ ll
total
-rw-rw-r--.  yinzhengjie yinzhengjie  Aug   hadoop-2.7..tar.gz
-rw-rw-r--.  yinzhengjie yinzhengjie  May   jdk-8u131-linux-x64.tar.gz
-rw-r--r--.  yinzhengjie yinzhengjie  May  : test
[yinzhengjie@yinzhengjie ~]$ rm -rf test
[yinzhengjie@yinzhengjie ~]$
[yinzhengjie@yinzhengjie ~]$
[yinzhengjie@yinzhengjie ~]$ ll
total
-rw-rw-r--.  yinzhengjie yinzhengjie  Aug   hadoop-2.7..tar.gz
-rw-rw-r--.  yinzhengjie yinzhengjie  May   jdk-8u131-linux-x64.tar.gz
[yinzhengjie@yinzhengjie ~]$
[yinzhengjie@yinzhengjie ~]$ hdfs dfs -put hadoop-2.7..tar.gz /home/yinzhengjie/test
[yinzhengjie@yinzhengjie ~]$ tar zxf test
[yinzhengjie@yinzhengjie ~]$ ll
total
drwxr-xr-x.  yinzhengjie yinzhengjie  Aug   hadoop-2.7.
-rw-rw-r--.  yinzhengjie yinzhengjie  Aug   hadoop-2.7..tar.gz
-rw-rw-r--.  yinzhengjie yinzhengjie  May   jdk-8u131-linux-x64.tar.gz
-rw-r--r--.  yinzhengjie yinzhengjie  May  : test
[yinzhengjie@yinzhengjie ~]$