Hadoop--HDFS 安装_引入hadoop-hdfs包。-优快云博客

本文详细介绍如何在多个节点上搭建Hadoop集群，包括JAVA环境的安装与配置，Hadoop的下载、解压及环境变量设置，配置文件的修改，SSH免密码登录的设置，以及Hadoop的完全分布式配置与启动。

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1.删除原系统上的JAVA

rpm -qa|grep jdk

rpm -qa|grep gcj

yum -y remove java-1.7.0-openjdk-1.7.0.99-2.6.5.1.el6.x86_64

yum -y remove ldapjdk-4.18-6.el6.x86_64

yum -y remove java-1.8.0-openjdk-1.8.0.91-1.b14.el6.x86_64

yum -y remove java-1.6.0-openjdk-1.6.0.38-1.13.10.4.el6.x86_64

yum -y remove java-1.8.0-openjdk-headless-1.8.0.91-1.b14.el6.x86_64

yum -y remove java-1.5.0-gcj-1.5.0.0-29.1.el6.x86_64

yum -y remove libgcj-4.4.7-17.el6.x86_64

2. 重新安装JAVA

2.1 新建/soft, /download目录

# mkdir /soft

# mkdir /download

2.2 download JAVA安装程式 (jdk-8u65-linux-x64.tar.gz)

2.3 tar JAVA 到 /soft

# tar -zxvf jdk-8u65-linux-x64.tar.gz

# mv /download/jdk1.8.0_65/ /soft

2.4 check java version

#>cd /soft/jdk/bin

#>./java –version

2.4 建立 ln for java

# ln -s /soft/jdk1.8.0_65/ /soft/jdk

2.5 建立java环境变量

# vim /etc/profile

export JAVA_HOME=/soft/jdk

export PATH=$PATH:$JAVA_HOME/bin

# source /etc/source

# java -version //check执行JAVA

3.关闭firewall和Selinux

3.1 关闭firewall

# chkconfig --list iptables

# service iptables stop

# service iptables status

# chkconfig iptables off

3.2 关闭selinux

# vim /etc/selinux/config

SELINUX 改为disable

设定后重启主机

4.在其它Node上执行第1，第2 ,第3

5.修改各Node的主机名

#vim /etc/sysconfig/network

HOSTNAME=S101

6. 修改hosts文件

# vim /etc/hosts

7. setup ssh

7.1 在S101上执行# ssh-keygen –t rsa

7.2 # cd /root/.ssh/

# cat id_rsa.pub >> authorized_keys

7.3 copy authorized_keys 到各node的/root/.ssh中

7.4 在S101上执行ssh s101, ssh S102 …以确认ssh有效

8. 下载和解压hadoop 2.7.3

8.1 download Hadoop 2.7.3到download目录hadoop-2.7.3.tar.gz

8.2 # tar –zxvf hadoop-2.7.3.tar.gz

8.3 # mv /download/hadoop-2.7.3 /soft

8.4 # vim /etc/profile

添加：

export HADOOP_HOME=/soft/hadoop

export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin

# source /etc/profile

8.5 # ln –s /soft/hadoop-2.7.3 /soft/hadoop

1. 在各node上执行8.1-8.5

9. 配置hadoop，使用符号连接的方式，让三种配置形态共存。

9.1 创建三个配置目录,内容等同于hadoop目录

cp -r /soft/Hadoop/etc/hadoop /soft/Hadoop/etc/local

cp -r /soft/Hadoop/etc/hadoop /soft/Hadoop/etc/pesudo

cp -r /soft/Hadoop/etc/hadoop /soft/Hadoop/etc/full

${hadoop_home}/etc/local

${hadoop_home}/etc/pesudo

${hadoop_home}/etc/full

9.2 # rm –rf /soft/Hadoop/etc/Hadoop

# cd /soft/hadoop/etc

# ln –s /soft/Hadoop/etc/full Hadoop

10. 配置完全分布式(${hadoop_home}/etc/hadoop/)

[core-site.xml]

<?xml version="1.0" encoding="UTF-8"?>

<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<name>fs.defaultFS</name>

</property>

</configuration>

[hdfs-site.xml]

<?xml version="1.0" encoding="UTF-8"?>

<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<name>dfs.replication</name>

</property>

</configuration>

[mapred-site.xml]

<?xml version="1.0"?>

<name>mapreduce.framework.name</name>

</property>

</configuration>

[yarn-site.xml]

<?xml version="1.0"?>

<name>yarn.resourcemanager.hostname</name>

</property>

<name>yarn.nodemanager.aux-services</name>

<value>mapreduce_shuffle</value>

</property>

</configuration>

#vim slaves

S102

S103

S104

[hadoop-env.sh]

...

export JAVA_HOME=/soft/jdk

11.将full目录内容分发给各node

# cd /soft/Hadoop/etc

# scp –r full s102:/soft/Hadoop/etc

# scp –r full s103:/soft/Hadoop/etc

# scp –r full s104:/soft/Hadoop/etc

12.格式化文件系统

$>hadoop namenode -format

13.启动hadoop进程

$>start-all.sh

14. web确认

http://101:50070/