Centos 7 配置单机Hadoop

时间：2023-11-09 20:50:38

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
  3. export HADOOP_HOME=/opt/hadoop-2.7.6
  4. export PATH=$PATH:$HADOOP_HOME/bin
  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
  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
  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
  3. cd ~/.ssh
  5. cat id_rsa.pub>>authorized_keys
  7. #如果不能绵密登录，执行以下命令
  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

Centos 7 配置单机Hadoop

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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
  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>

8.2 配置yarn-site.xml

  1. vim yarn-site.xml
  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

Centos 7 配置单机Hadoop

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