參考： www.cnblogs.com/forbeat/p/8179877.html

修改主機名：    1、在/etc/hosts 增加 192.168.56.102 hadoopmaster    2、在/etc/sysconfig/network 修改 HOSTNAME=hadoopmaster

重啟centos：reboot

建立使用者：useradd hadoop建立使用者密碼：passwd hadoop 然後根據提示修改密碼建立目錄：mkdir /home/hadoop/program修改許可權：chown -R hadoop:hadoop /home/hadoop配置免密登陸：ssh-keygen -t rsa cd ~/.sshcp id_rsa.pub authorized_keys測試免密登陸：ssh localhost，不用輸入密碼為成功1、jdk安裝配置：

下載：

wget http://download.oracle.com/otn-pub/java/jdk/8u151-b12/e758a0de34e24606bca991d704f6dcbf/jdk-8u151-linux-x64.tar.gz

解壓至/home/hadoop/program：tar -zxvf jdk-8u151-linux-x64.tar.gz配置環境變數（root下）：在/etc/profile 末尾加上：

#set JAVA_HOME
export JAVA_HOME=/home/hadoop/program/jdk1.8.0_151   ## 這裡要注意目錄要換成自己解壓的jdk 目錄
export JRE_HOME=${JAVA_HOME}/jre  
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib  
export PATH=${JAVA_HOME}/bin:$PATH
 

然後讓它生效：source /etc/profile

驗證：java -version

2、hadoop安裝配置：

下載：wget http://mirror.bit.edu.cn/apache/hadoop/common/hadoop-3.0.0/hadoop-3.0.0.tar.gz解壓至/home/hadoop/program:  tar -zxvf hadoop-3.0.0配置環境變數：在/etc/profile 增加 ：

# set HADOOP_HOME
export HADOOP_HOME=/home/hadoop/program/hadoop-3.0.0
export PATH=$PATH:$HADOOP_HOME/sbin:$HADOOP_HOME/bin
export  HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export  HADOOP_OPTS="$HADOOP_OPTS -Djava.library.path=$HADOOP_HOME/lib
 

然後讓它生效：source /etc/profile配置hadoop相關檔案：進入/home/hadoop/program/hadoop-3.0.0/sbinhadoop-env.sh 匯入JAVA_HOME：

    export JAVA_HOME=/home/hadoop/program/jdk1.8.0_151   ## 這裡要注意目錄要換成自己解壓的jdk 目錄

core-site.xml，配置hdfs埠和地址，臨時檔案存放地址

<configuration>
    <property>
        <name>fs.default.name</name>
        <value>hdfs://hadoopmaster:9000</value>
    </property>
    <property>
        <name>hadoop.tmp.dir</name>
        <value>/home/hadoop/hadoop/tmp</value>
</configuration>

修改hdfs-site.xml 配置副本個數以及資料存放的路徑

<configuration>
    <property>
        <name>dfs.replication</name>
        <value>1</value>
    </property>
    <property>
        <name>dfs.namenode.name.dir</name>
        <value>/home/hadoop/hadoop/hdfs/name</value>
    </property>
    <property>
        <name>dfs.namenode.data.dir</name>
        <value>/home/hadoop/hadoop/hdfs/data</value>
    </property>
</configuration>

修改mapred-site.xml，配置使用yarn框架執行mapreduce處理程式，與之前版本多了後面兩部
不配置mapreduce.application.classpath這個引數mapreduce執行時會報錯：
Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster

<configuration>
    <property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
    </property>
    <property>
        <name>mapreduce.application.classpath</name>
        <value>
            /usr/local/hadoop3/etc/hadoop,
            /usr/local/hadoop3/share/hadoop/common/*,
            /usr/local/hadoop3/share/hadoop/common/lib/*,
            /usr/local/hadoop3/share/hadoop/hdfs/*,
            /usr/local/hadoop3/share/hadoop/hdfs/lib/*,
            /usr/local/hadoop3/share/hadoop/mapreduce/*,
            /usr/local/hadoop3/share/hadoop/mapreduce/lib/*,
            /usr/local/hadoop3/share/hadoop/yarn/*,
            /usr/local/hadoop3/share/hadoop/yarn/lib/*
        </value>
    </property>
</configuration>

修改yar-site.xml

<configuration>

<!-- Site specific YARN configuration properties -->
    <property>
        <name>yarn.resourcemanager.hostname</name>
        <value>hadoopmaster</value>
    </property>
    <property>
        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
    </property>
</configuration>

workers檔案裡新增主機名：hadoopmaster

驗證HADOOP：1、namenode格式化：hadoop namenode -format2、啟動Hadoop：start-all.sh3、輸入jps ，顯示NameNode、DataNode、SecondaryNameNode、NodeManager、ResourceManager4、若有缺漏，檢視對應日誌：/home/hadoop/program/hadoop-3.0.0/logs目錄下