hadoop环境搭建(linux单机版)

时间:2021-02-01 12:15:27

一、在Ubuntu下创建hadoop用户组合hadoop用户

1、创建hadoop用户组      addgroup hadoop 2、创建hadoop用户      adduser -ingroup hadoop hadoop 3、为hadoop用户添加权限      vim /etc/sudoers hadoop环境搭建(linux单机版)4、切换到hadoop用户     su - hadoop二、ssh安装与设置1、安装ssh      sudo apt-get install openssh-server2、启动服务     sudo /etc/init.d/ssh start3、查看启动     ps -e | grep ssh4、设置免密码登录,生成私钥与公钥     ssh-keygen -t rsa -P ""     此时会在/home/hadoop/.ssh下生成两个文件:id_rsa和id_rsa.pub,前者为私钥,后者为公钥。     将公钥追加到authorized_keys中,它用户保存所有允许以当前用户身份登录到ssh客户端用户的公钥内容。     cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys5、ssh登录     ssh localhost6、退出登录     exit三、安装java环境1、安装java
 sudo apt-get install openjdk-7-jdk
2、查看java版本     java -version3、查看java安装路径    
 update-alternative --config java
四、安装hadoop2.7.1     1、下载hadoop2.7.1.tar.gz     2、解压:sudo tar xzf hadoop-2.7.1.tar.gz     3、复制到:sudo mv hadoop-2.7.1 /usr/local/hadoop     4、权限设置:sudo chmod 774 /usr/local/hadoop     5、配置.bashrc文件
 #HADOOP VARIABLES START
export JAVA_HOME
=/usr/lib/jvm/java-7-openjdk-amd64
export HADOOP_INSTALL
=/usr/local/hadoop
export PATH
=$PATH:$HADOOP_INSTALL/bin
export PATH
=$PATH:$HADOOP_INSTALL/sbin
export HADOOP_MAPRED_HOME
=$HADOOP_INSTALL
export HADOOP_COMMON_HOME
=$HADOOP_INSTALL
export HADOOP_HDFS_HOME
=$HADOOP_INSTALL
export YARN_HOME
=$HADOOP_INSTALL
export HADOOP_COMMON_LIB_NATIVE_DIR
=$HADOOP_INSTALL/lib/native
export HADOOP_OPTS
="-Djava.library.path=$HADOOP_INSTALL/lib"
#HADOOP VARIABLES END
     6、环境变量生效          source ~/.bashrc    7、编辑/usr/local/hadoop/etc/hadoop/hadoop-env.sh     hadoop环境搭建(linux单机版)五、验证测试     1、/usr/local/hadoop路径下创建input文件夹    2、拷贝README.txt到input     3、执行WordCount         bin/hadoop jar share/hadoop/mapreduce/sources/hadoop-mapreduce-examples-2.4.0-sources.jar org.apache.hadoop.examples.WordCount input output     hadoop环境搭建(linux单机版)六、结果演示   hadoop环境搭建(linux单机版) hadoop环境搭建(linux单机版)