下载Hadoop和JDK

• 下载Hadoop地址：http://archive.cloudera.com/cdh5/cdh/5/hadoop-2.6.0-cdh5.7.0.tar.gz

• 下载jdk：注册甲骨文账号下载，推荐1.7版本

安装JDK

• 解压jdk压缩包

  tar -zxvf /home/hadoop/software/jdk-7u80-linux-x64.tar.gz -C /usr/java/

• 配置jdk环境变量

  hadoop:root:/usr/java:>vi /etc/profile

  /etc/profile

  System wide environment and startup programs, for login setup

  Functions and aliases go in /etc/bashrc

  It’s NOT a good idea to change this file unless you know what you

  are doing. It’s much better to create a custom.sh shell script in

  /etc/profile.d/ to make custom changes to your environment, as this

  will prevent the need for merging in future updates.

  #add path
  export JAVA_HOME=/usr/java/jdk1.7.0_80
  export PATH= $JAVA_HOME/bin:$PATH
  #show path

  hadoop:root:/usr/java:>source /etc/profile
  hadoop:root:/usr/java:>java -version
  java version “1.7.0_80”
  Java™ SE Runtime Environment (build 1.7.0_80-b15)
  Java HotSpot™ 64-Bit Server VM (build 24.80-b11, mixed mode)

配置shh

hadoop:hadoop:/home/hadoop:>ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/hadoop/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/hadoop/.ssh/id_rsa.
Your public key has been saved in /home/hadoop/.ssh/id_rsa.pub.
The key fingerprint is:
ca:20:e2:68:64:46:e0:f2:62:63:b9:60:71:a5:75:4a hadoop@hadoop
The key's randomart image is:
+--[ RSA 2048]----+
|.    E .         |
|o   = o          |
|.+ o .           |
|o.+              |
|+Xo .   S        |
|@oo. o .         |
|.+    o          |
|.                |
|                 |
+-----------------+
hadoop:hadoop:/home/hadoop:>
hadoop:hadoop:/home/hadoop:>cp .ssh/id_rsa.pub ~/.ssh/authorized_keys
hadoop:hadoop:/home/hadoop:>cd .ssh/
hadoop:hadoop:/home/hadoop/.ssh:>ll
total 12
-rw-r--r-- 1 hadoop hadoop  395 Jan  2 02:16 authorized_keys
-rw------- 1 hadoop hadoop 1675 Jan  2 02:16 id_rsa
-rw-r--r-- 1 hadoop hadoop  395 Jan  2 02:16 id_rsa.pub

安装Hadoop

• 解压Hadoop
  hadoop:hadoop:/home/hadoop/app:>tar -zxvf /home/hadoop/software/hadoop-2.6.0-cdh5.7.0.tar.gz -C /home/hadoop/app/

• 配置环境

  hadoop:hadoop:/home/hadoop:>vi .bash_profile

  .bash_profile

  Get the aliases and functions

  if [ -f ~/.bashrc ]; then
  . ~/.bashrc
  fi

  User specific environment and startup programs

  export HADOOP_HOME=/home/hadoop/app/hadoop-2.6.0-cdh5.7.0
  export PATH= $HADOOP_HOME/bin:$HADOOP_HOME/sbin:$PATH

  hadoop:hadoop:/home/hadoop:>source .bash_profile
  hadoop:hadoop:/home/hadoop:>echo $HADOOP_HOME
  /home/hadoop/app/hadoop-2.6.0-cdh5.7.0

修改配置文件

• hadoop-env.sh

  export JAVA_HOME=/usr/java/jdk1.7.0_80

• core-site.xml

  <configuration> <property> <name>fs.defaultFS</name> <value>hdfs://hadoop:8020</value> </property> <property> <name>hadoop.tmp.dir</name> <value>/home/hadoop/app/tmp</value> </property> </configuration>

• hdfs-site.xml

  <configuration>

      <property>
              <name>dfs.replication</name>
              <value>1</value>
      </property>
  

  </configuration>

• slaves

  hadoop

• mapred-site.xml（正常情况下没有这个文件，可由 mapred-queues.xml.template
  复制而来）

  <configuration> <property> <name>mapreduce.framework.name</name> <value>yarn</value> </property> </configuration>

• yarn-site.xml

  <configuration> <property> <name>yarn.nodemanager.aux-services</name> <value>mapreduce_shuffle</value> </property> </configuration>

格式化Hadoop

   hdfs namenode -format

启动Hadoop

hadoop:hadoop:/home/hadoop/app/hadoop-2.6.0-cdh5.7.0/etc/hadoop:>start-all.sh 
This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
18/01/02 02:49:33 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Starting namenodes on [hadoop]
hadoop: starting namenode, logging to /home/hadoop/app/hadoop-2.6.0-cdh5.7.0/logs/hadoop-hadoop-namenode-hadoop.out
hadoop: starting datanode, logging to /home/hadoop/app/hadoop-2.6.0-cdh5.7.0/logs/hadoop-hadoop-datanode-hadoop.out
Starting secondary namenodes [0.0.0.0]
0.0.0.0: starting secondarynamenode, logging to /home/hadoop/app/hadoop-2.6.0-cdh5.7.0/logs/hadoop-hadoop-secondarynamenode-hadoop.out
18/01/02 02:50:15 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
starting yarn daemons
starting resourcemanager, logging to /home/hadoop/app/hadoop-2.6.0-cdh5.7.0/logs/yarn-hadoop-resourcemanager-hadoop.out
hadoop: starting nodemanager, logging to /home/hadoop/app/hadoop-2.6.0-cdh5.7.0/logs/yarn-hadoop-nodemanager-hadoop.out
hadoop:hadoop:/home/hadoop/app/hadoop-2.6.0-cdh5.7.0/etc/hadoop:>jps
8345 NodeManager
8066 SecondaryNameNode
7820 NameNode
7914 DataNode
8249 ResourceManager
8613 Jps