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这篇文章主要为大家展示了“Hadoop如何实现单节点搭建”,内容简而易懂,条理清晰,希望能够帮助大家解决疑惑,下面让小编带领大家一起研究并学习一下“Hadoop如何实现单节点搭建”这篇文章吧。
#Hadoop 单节点搭建
环境: VirtualBox Unbuntu14.04 LTS
##安装JDK #####查看当前java版本 java -version #####更新最新的软件包信息 sudo apt-get updata #####安装JDK sudo apt-get install default-jdk #####再查看java版本 java -version ##安装SSH #####sudo apt-get install ssh ##安装rsync sudo apt-get install rsync
ssh-keygen -t dsa -p '' -f ~/.ssh/id_dsa # 产生密钥 ll ~/.ssh # 查看是否存在 id_dsa.pub文件 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys # 将公钥添加到许可证文件中
##安装Hadoop ####首先保证虚拟机可以链接网络 可以将虚拟机改为 网络地址转换NAT #####Hadoop官网 https://archive.apache.org/dist/hadoop/common #####选择2.6.0的话 复制该文件的链接使用wget 命令下载 wget https://archive.apache.org/dist/hadoop/common/hadoop-2.6.0/hadoop-2.6.0.tar.gz #####解压 sudo tar -zxvf hadoop-2.6.0.tar.gz #####移动到指定路径 sudo mv hadoop-2.6.0 /usr/local/hadoop #####查看文件是否完整 ####设置环境变量 sudo gedit ~/.bashrc export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64 #java 路径 export HADOOP_HOME=/usr/local/hadoop #hadoop 路径 export PATH=$PATH:$HADOOP_HOME/bin export PATH=$PATH:$HADOOP_HOME/sbin export HADOOP_MAPRED_HOME=$HADOOP_HOME export HADOOP_COMMON_HOME=$HADOOP_HOME export HADOOP_HDFS_HOME=$HADOOP_HOME export YARN_HOME=$HADOOP_HOME export HADOOP_COMMON_HOME=$HADOOP_HOME export HADOOP_HDFS_HOME=$HADOOP_HOME export YARN_HOME=$HADOOP_HOME export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native #链接库 export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib" #链接库 export JAVA_LIBRARY_PATH=$HADOOP_HOME/lib/native:$JAVA_LIBRARY_PATH ######使环境变量生效 重启或输入 source ~/.bashrc ####修改hadoop配置文件 #####修改hadoop-env.sh sudo gedit hadoop-env.sh
# The java implementation to use. export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64
#####修改core-site.xml sudo gedit core-site.xml
<configuration> <property> <name>fs.default.name</name> <value>hdfs://localhost:9000</value> </property> </configuration>
#####修改yarn-site.xml sudo gedit yarn-site.xml
<configuration> <!-- Site specific YARN configuration properties --> <property> <name>yarn.nodemanager.aux-services</name> <value>mapreduce_shuffle</value> </property> <property> <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name> <value>org.apache.hadoop.mapred.ShuffleHandler</value> </property> </configuration>
#####修改mapred-site.xml sudo scp mapred-site.xml.template mapred-site.xml sudo gedit mapred-site.xml
<configuration> <property> <name>mapreduce.framework.name</name> <value>yarn</value> </property> </configuration>
#####修改hdfs-site.xml sudo gedit hdfs-site.xml
<configuration> <property> <name>dfs.replication</name> <value>3</value> </property> <property> <name>dfs.namenode.name.dir</name> <value>file:/usr/local/hadoop/hadoop_data/hdfs/namenode</value> </property> <property> <name>dfs.datanode.data.dir</name> <value>file:/usr/local/hadoop/hadoop_data/hdfs/datanode</value> </property> </configuration>
####创建相应的目录 sudo mkdir -p /usr/local/hadoop/hadoop_data/hdfs/namenode # NameNode存储目录 sudo mkdir -p /usr/local/hadoop/hadoop_data/hdfs/datanode # DataNode 存储目录 sudo chown hduser:hduser -R /usr/local/hadoop # 修改目录所有者 ####格式化namenode hadoop namenode -format ####启动hadoop start-dfs.sh start-yarn.sh ####查看
点击Nodes 查看当前节点
#####在浏览器中输入http://localhost:50070 查看NameNode HDFS Web 界面 点击Datanodes 显示当前启动的Datanode
##全部命令参考
1 cd /usr/local/ 2 ll 3 rm -rf hadoop/ 4 sudo rm -rf hadoop/ 5 ll 6 update-alternatives --display java 7 java -version 8 sudo apt-get update 9 sudo apt-get install default-jdk 10 java -version 11 update-alternatives --display java # 查看java安装路径 12 sudo apt-get install ssh 13 sudo apt-get install rsync 14 ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa 15 ll ~/.ssh 16 cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys 17 wget https://archive.apache.org/dist/hadoop/common/hadoop-2.6.0/hadoop-2.6.0.tar.gz 18 ll 19 sudo tar -zxvf hadoop-2.6.0.tar.gz 20 sudo mv hadoop-2.6.0 /usr/local/hadoop 21 ll /usr/local/hadoop 22 ll 23 cd /usr/local 24 ls 25 cd hadoop/ 26 ll 27 cd / 28 cd 29 wget https://archive.apache.org/dist/hadoop/common/hadoop-2.6.0/hadoop-2.6.0.tar.gz.md5 30 wget https://archive.apache.org/dist/hadoop/common/hadoop-2.6.0/hadoop-2.6.0.tar.gz.mds 31 ll 32 ./hadoop-2.6.0.tar.gz.mds 33 sudo ./hadoop-2.6.0.tar.gz.mds 34 cd /usr/local/hadoop/ 35 ll 36 cd ~ 37 ll 38 wget https://archive.apache.org/dist/hadoop/common/hadoop-2.6.0/hadoop-2.6.0.tar.gz.md5 39 ll 40 md5sum -c hadoop-2.6.0.tar.gz.md5 #检查下载的文件是否完整 41 md5sum -c hadoop-2.6.0.tar.gz.mds 42 md5sum -c hadoop-2.6.0.tar.gz.md5 43 rm -f hadoop-2.6.0.tar.gz 44 rm -f hadoop-2.6.0.tar.gz.1 45 rm -f hadoop-2.6.0.tar.gz.mds 46 ll 47 wget https://archive.apache.org/dist/hadoop/common/hadoop-2.6.0/hadoop-2.6.0.tar.gz 48 sudo tar -zxvf hadoop-2.6.0.tar.gz 49 sudo mv hadoop-2.6.0 /usr/local/hadoop 50 ll /usr/local/ 51 cd hadoop 52 ll /usr/local/hadoop/ 53 md5sum -c hadoop-2.6.0.tar.gz.md5 54 sudo gedit ~/.bashrc 55 source ~/.bashrc 56 cd /usr/local/hadoop/etc/hadoop/ 57 ll 58 sudo gedit hadoop-env.sh 59 sudo gedit core-site.xml 60 sudo gedit yarn-site.xml 61 sudo scp mapred-site.xml.template mapred-site.xml 62 sudo gedit mapred-site.xml 63 sudo gedit hdfs-site.xml 64 sudo mkdir -p /usr/local/hadoop/hadoop_data/hdfs/namenode 65 sudo mkdir -p /usr/local/hadoop/hadoop_data/hdfs/datanode 66 sudo chown hduser:hduser -R /usr/local/hadoop 67 hadoop namenode -format 68 start-dfs.sh 69 start-yarn.sh 70 jps 71 history
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