3步在Linux虚拟机搭建Hadoop
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1. 虚拟机环境准备
1.虚拟机环境准备
(1)克隆虚拟机;
(2)配置mac:
配置mac:
vim /etc/udev/rules.d/70-persistent-net.rules
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:50:56:21:7F:7E", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
配置网卡:
vim /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE="eth0"
BOOTPROTO="dhcp"
ONBOOT="yes"
重启网卡服务:
service network restart
(3)修改主机名;
①临时有效:无需重启
hostname NEW_NAME
②永久有效
[ ]
... hadoop
(4)关闭防火墙;
1) 重启后生效
开启:
chkconfig iptables on
关闭:
chkconfig iptables off
2) 即时生效,重启后失效
开启:
service iptables start
关闭:
service iptables stop
(5)创建hadoop用户;
# 创建用户
adduser hadoop
passwd hadoop
输入2次密码
(6)配置hadoop用户具有root权限:
方法1,去井号,赋予root组权限
vim /etc/sudoers
# Allows people in group wheel to run all commands
wheel ALL=(ALL) ALL
usermod -g root hadoop
修改完毕,现在可以用hadoop帐号登录,然后用命令 su – ,即可获得root权限进行操作。
方法2:加一行
vim /etc/sudoers
## Allow root to run any commands anywhere
root ALL=(ALL) ALL
hadoop ALL=(ALL) ALL
修改完毕,现在可以用hadoop帐号登录,然后用命令 sudo – ,即可获得root权限进行操作。
方法3:修改 /etc/passwd 文件
hadoop:x:0:501::/home/hadoop:/bin/bash
(7)用hadoop用户,在/opt目录下创建文件夹 module、software;
sudo mkdir module
sudo mkdir software
修改module、software目录的所有者:
sudo chown hadoop:hadoop module/ software/
2. 安装jdk1.8版本
(1)卸载当前低于1.7的jdk
判断jdk是否安装(显示版本号等信息,说明已经安装)
which java(查看JDK的安装路径)
卸载:
rm -rf JDK地址(卸载JDK)
查看是否卸载完毕:
java -version
java
javac
删除配置的环境变量,至此JDK卸载完毕:
vi /etc/profile
删除JAVA_HOME=...
(2)安装jdk:
从官网下载:jdk-8u251-linux-x64.tar.gz,
上传到/opt/software目录;
解压到/opt/module:
tar -xzvf jdk-8u251-linux-x64.tar.gz -C /opt/module/
配置JDK环境变量:
①获取JDK路径:
[hadoop@hadoop jdk1.8.0_251]$ pwd
/opt/module/jdk1.8.0_251
②配置/etc/profile,添加:
[hadoop@hadoop jdk1.8.0_251]$ sudo vim /etc/profile
export JAVA_HOME=/opt/module/jdk1.8.0_251
export PATH=$PATH:$JAVA_HOME/bin
③让修改后的文件生效(即加载环境变量):
[hadoop@hadoop jdk1.8.0_251]$ source /etc/profile
④验证是否安装成功:
[hadoop@hadoop jdk1.8.0_251]$ java -version
java version "1.8.0_251"
Java(TM) SE Runtime Environment (build 1.8.0_251-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.251-b08, mixed mode)
[hadoop@hadoop jdk1.8.0_251]$
3. 安装Hadoop
(1)官网下载:hadoop-2.7.2.tar.gz,
并上传到虚拟机的/opt/software;
(2)解压到/opt/software:
[hadoop@hadoop software]$ tar -xzvf hadoop-2.7.2.tar.gz -C /opt/module/
(3)将Hadoop添加到环境变量:
[hadoop@hadoop hadoop-2.7.2]$ pwd
/opt/module/hadoop-2.7.2
[hadoop@hadoop hadoop-2.7.2]$ sudo vim /etc/profile
#HADOOP_HOME
export HADOOP_HOME=/opt/module/hadoop-2.7.2
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin
(4)让修改后的文件生效(即加载环境变量):
[hadoop@hadoop hadoop-2.7.2]$ source /etc/profile
(5)测试安装是否成功:
[hadoop@hadoop hadoop-2.7.2]$ hadoop version
Hadoop 2.7.2
Subversion https://git-wip-us.apache.org/repos/asf/hadoop.git -r b165c4fe8a74265c792ce23f546c64604acf0e41
Compiled by jenkins on 2016-01-26T00:08Z
Compiled with protoc 2.5.0
From source with checksum d0fda26633fa762bff87ec759ebe689c
This command was run using /opt/module/hadoop-2.7.2/share/hadoop/common/hadoop-common-2.7.2.jar
[hadoop@hadoop hadoop-2.7.2]$
注:hadoop version执行不对的话,重启虚拟机即可。
附几篇以前文的链接: