Centos 7 配置单机Hadoop

Centos 7 配置单机Hadoop

2018年10月11日 09:48:13 GT_Stone 阅读数：82

 

系统镜像：CentuOS-7-x86_64-Everything-1708

Java环境：JDK-8u181-linux-x64.tar.gz

Hadoop版本：hadoop-2.7.6.tar.gz

1、安装配置JDK，配置环境变量(路径很重要，我的路径是:/usr/local/java/jdk1.8.0_181)

java环境的具体安装过程不做记录，下载好相应的压缩包，解压至你想要的路径就好

环境变量如下：：

1.  
   export JAVA_HOME=/usr/local/java/jdk1.8.0_181
2.  
   export JRE_HOME=${JAVA_HOME}/jre
3.  
   export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
4.  
   export PATH=${JAVA_HOME}/bin:$PATH

2、下载hadoop

http://mirror.bit.edu.cn/apache/hadoop/common/

3、解压到/opt目录下

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

4、配置hadoop环境变量：

1.  
   vim /etc/profile
2.  
    
3.  
   export HADOOP_HOME=/opt/hadoop-2.7.6
4.  
   export PATH=$PATH:$HADOOP_HOME/bin
5.  
    
6.  
   source /etc/profile

5、配置hadoop

5.1 配置hadoop-env.sh

1.  
   vim /opt/hadoop-2.7.6/etc/hadoop/hadoop-env.sh
2.  
    
3.  
    
4.  
   export JAVA_HOME=/usr/local/java/jdk1.8.0_181

5.2 配置core-site.xml

1.  
   vim /opt/hadoop-2.7.6/etc/hadoop/core-site.xml
2.  
    
3.  
    
4.  
   <configuration>
5.  
   <property>
6.  
   <name>hadoop.tmp.dir</name>
7.  
   <value>file:///opt/hadoop-2.7.6</value>
8.  
   <description>Abase for other temporary directories.</description>
9.  
   </property>
10.  
    <property>
11.  
    <name>fs.defaultFS</name>
12.  
    <value>hdfs://192.168.139.129:8888</value>
13.  
    </property>
14.  
    </configuration>

5.3 配置 hdfs-site.xml

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

1.  
   <configuration>
2.  
   <property>
3.  
   <name>dfs.replication</name>
4.  
   <value>1</value>
5.  
   </property>
6.  
   <property>
7.  
   <name>dfs.namenode.name.dir</name>
8.  
   <value>file:///opt/hadoop-2.7.6/tmp/dfs/name</value>
9.  
   </property>
10.  
    <property>
11.  
    <name>dfs.datanode.data.dir</name>
12.  
    <value>file:///opt/hadoop-2.7.6/tmp/dfs/data</value>
13.  
    </property>
14.  
    </configuration>

6、配置ssh免密码登录

1.  
   ssh-keygen -t rsa
2.  
    
3.  
   cd ~/.ssh
4.  
    
5.  
   cat id_rsa.pub>>authorized_keys
6.  
    
7.  
   #如果不能绵密登录，执行以下命令
8.  
    
9.  
   chmod 710 authorized_keys

7、启动

7.1 格式化HDFS

hdfs namenode -format

7.2 启动

./sbin/start-dfs.sh

7.3 测试 http://192.168.139.129:50070

如果访问不成功，请关闭linux系统防火墙，或者开放端口

8、配置yarn

8.1 配置mapred-site.xml

1.  
   cd /opt/hadoop-2.7.6/etc/hadoop/
2.  
   cp mapred-site.xml.template mapred-site.xml
3.  
   vim mapred-site.xml
4.  
    
5.  
    
6.  
   <configuration>
7.  
   <!-- 通知框架MR使用YARN -->
8.  
   <property>
9.  
   <name>mapreduce.framework.name</name>
10.  
    <value>yarn</value>
11.  
    </property>
12.  
    </configuration>
13.  
     

8.2 配置yarn-site.xml

1.  
   vim yarn-site.xml
2.  
    
3.  
    
4.  
   <configuration>
5.  
   <!-- reducer取数据的方式是mapreduce_shuffle -->
6.  
   <property>
7.  
   <name>yarn.nodemanager.aux-services</name>
8.  
   <value>mapreduce_shuffle</value>
9.  
   </property>
10.  
    </configuration>

8.3启动

1.  
   cd /opt/hadoop-2.7.6
2.  
   ./sbin/start-yarn.sh

8.4 测试 http://192.168.139.129:8088