系統映象：CentuOS-7-x86_64-Everything-1708

Java環境：JDK-8u181-linux-x64.tar.gz

Hadoop版本：hadoop-2.7.6.tar.gz

1、安裝配置JDK，配置環境變數(路徑很重要，我的路徑是:/usr/local/java/jdk1.8.0_181)

        java環境的具體安裝過程不做記錄，下載好相應的壓縮包，解壓至你想要的路徑就好

        環境變數如下：：

export JAVA_HOME=/usr/local/java/jdk1.8.0_181
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
 

2、下載hadoop

3、解壓到/opt目錄下

tar -zxvf hadoop-2.7.6.tar.gz -C /opt/

4、配置hadoop環境變數：  

vim /etc/profile

export HADOOP_HOME=/opt/hadoop-2.7.6
export PATH=$PATH:$HADOOP_HOME/bin

source /etc/profile

5、配置hadoop

  5.1 配置hadoop-env.sh

vim /opt/hadoop-2.7.6/etc/hadoop/hadoop-env.sh


export JAVA_HOME=/opt/jdk1.8.0_45
 

   5.2 配置core-site.xml

vim /opt/hadoop-2.7.6/etc/hadoop/core-site.xml


<configuration>
<property>
        <name>hadoop.tmp.dir</name>
        <value>file:///opt/hadoop-2.7.6</value>
        <description>Abase for other temporary directories.</description>
    </property>
    <property>
        <name>fs.defaultFS</name>
        <value>hdfs://192.168.139.129:8888</value>
    </property>
</configuration>
 

  5.3 配置 hdfs-site.xml

vim /opt/hadoop-2.7.6/etc/hadoop/hdfs-site.xml

<configuration>
        <property>
        <name>dfs.replication</name>
        <value>1</value>
    </property>
    <property>
        <name>dfs.namenode.name.dir</name>
        <value>file:///opt/hadoop-2.7.6/tmp/dfs/name</value>
    </property>
    <property>
        <name>dfs.datanode.data.dir</name>
        <value>file:///opt/hadoop-2.7.6/tmp/dfs/data</value>
    </property>
</configuration>

6、配置ssh免密碼登入

ssh-keygen -t rsa

cd ~/.ssh

cat id_rsa.pub>>authorized_keys

#如果不能綿密登入，執行以下命令

chmod 710 authorized_keys

 7、啟動

     7.1 格式化HDFS

hdfs namenode -format

     7.2 啟動

./sbin/start-dfs.sh

     7.3 測試 http://192.168.139.129:50070

  如果訪問不成功，請關閉linux系統防火牆，或者開放埠

8、配置yarn

8.1 配置mapred-site.xml

cd /opt/hadoop-2.7.6/etc/hadoop/
cp mapred-site.xml.template mapred-site.xml
vim mapred-site.xml


<configuration>
    <!-- 通知框架MR使用YARN -->
    <property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
    </property>
</configuration>

8.2 配置yarn-site.xml

vim yarn-site.xml


<configuration>
    <!-- reducer取資料的方式是mapreduce_shuffle -->
    <property>
        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
    </property>
</configuration>

8.3啟動

cd /opt/hadoop-2.7.6
./sbin/start-yarn.sh

8.4 測試 http://192.168.139.129:8088