[Hadoop]单机尝试安装并测试Hadoop2.7.1(附带注释脚本)

还算是比较顺利，在代码中注释写得已经比较详细了。附上脚本，有兴趣的朋友可以尝试一下。注意bashrc中添加的环境变量名的修改，否则会出现找不到主类等问题。

 1 ###ubuntu 14.04 LTS
 2
 3 ##make hadoop account
 4 sudo addgroup hadoop    #make a group named hadoop
 5 sudo adduser -ingroup hadoop hadoop    #add an user named hadoop
 6 sudo vi /etc/sudoers    #add hadoop into sudoers(hadoop=root)
 7
 8 ##change your account
 9 sudo su hadoop
10
11 ##install ssh
12 sudo apt-get install openssh-server    #install openssh-server
13 sudo /etc/init.d/ssh start    #start ssh server
14 ps -e | grep ssh    #check whether ssh is started or not
15
16 ##log in without password
17 ssh-keygen -t rsa -P ""    #log in without password generate rsa & rsa.pub
18 cp ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys    #add authorized_keys to realize ‘log in without password‘
19 ssh localhost    #check
20 exit    #check
21
22 ##install java environment
23 sudo apt-get install openjdk-7-jdk    #install jdk
24 java -version    #check whether java is installed or not
25
26 ##get & install hadoop 2.7.1    (under user : hadoop)
27 cd ~
28 mkdir hadoop
29 sudo wget http://mirror.bit.edu.cn/apache/hadoop/common/hadoop-2.7.1/hadoop-2.7.1.tar.gz    #get hadoop2.7.1
30 sudo tar xzf hadoop-2.7.1.tar.gz    #unzip the hadoop-*.*.*.tar.gz
31 sudo rm hadoop-2.7.1.tar.gz    #remove the zip
32 sudo mv hadoop-2.7.1 /usr/local/    #install hadoop at local
33 sudo chmod 774 /usr/local/hadoop     #granted permissions to users (r&w)
34
35 ##configure ~/.bashrc
36 update-alternatives --config java    #get java‘s path (stared one. such as ‘/usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java‘. but we just need ‘/usr/lib/jvm/java-7-openjdk-amd64‘ this shorter path to set up JAVA_HOME environment variables)
37 sudo vi ~/.bashrc    #edit bashrc file
38
39 ##add the content below to the end of bashrc
40 #--------------------------------------------------------------#
41
42 #HADOOP VARIABLES START
43 export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64
44 export HADOOP_INSTALL=/usr/local/hadoop-2.7.1
45 export PATH=$PATH:$HADOOP_INSTALL/bin
46 export PATH=$PATH:$HADOOP_INSTALL/sbin
47 export HADOOP_MAPRED_HOME=$HADOOP_INSTALL
48 export HADOOP_COMMON_HOME=$HADOOP_INSTALL
49 export HADOOP_HDFS_HOME=$HADOOP_INSTALL
50 export YARN_HOME=$HADOOP_INSTALL
51 export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_INSTALL/lib/native
52 export HADOOP_OPTS="-Djava.library.path=$HADOOP_INSTALL/lib"
53 #HADOOP VARIABLES END
54
55 #--------------------------------------------------------------#
56 source ~/.bashrc    #make the environment variables come into effect
57
58 ##configure hadoop
59 sudo vi /usr/local/hadoop-2.7.1/etc/hadoop/hadoop-env.sh     #edit hadoop-env.sh
60 ?JAVA_HOME    #(in vim) locate JAVA_HOME
61 #change ‘export JAVA_HOME=${JAVA_HOME}‘ into ‘export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64‘
62 source /usr/local/hadoop-2.7.1/etc/hadoop/hadoop-env.sh #update
63
64 ##test
65 cd /usr/local/hadoop-2.7.1/    #go there
66 sudo mkdir test
67 sudo cp README.txt test
68 bin/hadoop jar share/hadoop/mapreduce/sources/hadoop-mapreduce-examples-2.7.1-sources.jar org.apache.hadoop.examples.WordCount input output