Hadoop 单节点搭建

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

配置ssh

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

这里写图片描述

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 

    
    
    fs.default.name
    hdfs://localhost:9000
    
    

修改yarn-site.xml

sudo gedit yarn-site.xml 

    
    
    
    yarn.nodemanager.aux-services
    mapreduce_shuffle
    
    
    yarn.nodemanager.aux-services.mapreduce.shuffle.class
    org.apache.hadoop.mapred.ShuffleHandler
    
    

修改mapred-site.xml

sudo scp mapred-site.xml.template mapred-site.xml
sudo gedit mapred-site.xml

    
    
    mapreduce.framework.name
    yarn
    
    

修改hdfs-site.xml

sudo gedit hdfs-site.xml 

    
    
    dfs.replication
    3
    
    
    dfs.namenode.name.dir
    file:/usr/local/hadoop/hadoop_data/hdfs/namenode
    
    
    dfs.datanode.data.dir
    file:/usr/local/hadoop/hadoop_data/hdfs/datanode
    
    

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

在浏览器中输入http://localhost:8088查看 Hadoop ResourceManager Web 界面

点击Nodes 查看当前节点

这里写图片描述

在浏览器中输入http://localhost:50070 查看NameNode HDFS Web 界面

这里写图片描述

点击Datanodes 显示当前启动的Datanode

这里写图片描述

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