#!/bin/bash
#@author：feiyuanxing 【既然笨到家，就要努力到家】
#@date：2017-01-05
#@E-Mail：feiyuanxing@gmail.com
#@TARGET:一键安装hadoop 2.7.1 centos 64位
#@CopyRight:本脚本遵守 未来星开源协议（http://feiyuanxing.com/kaiyuanxieyi/kaiyuanxieyi.html）

#讲解：
#1.请使用root用户执行，软件默认安装在work用户，通常会在linux的/home 挂载一个大型磁盘
#2.软件安装在/home/work/local/hadoop/hadoop 有人问为什么这么深
# 2.1 work目录下local包含所有软件 hadoop安装大数据生态圈其他软件
# 2.2 hadoop的数据安装在 /home/work/data ，此目录由于数量较大，可以单独挂载一个磁盘

INSTALL_HOME=/home/work/local/hadoop
ROOT_HOME=/home/work/local/hadoop/hadoop

#hadoop 数据路径
hadoop_logs=/home/work/data/hadoop/logs
hadoop_tmp=/home/work/data/hadoop/tmp

mkdir -p ${INSTALL_HOME} && cd ${INSTALL_HOME}
mkdir -p ${hadoop_logs} && mkdir -p ${hadoop_tmp} && chown -R work:work /home/work/data/hadoop

function add_work_user(){
adduer work -d /home/work
passwd work

}

function install_jdk(){
# 有jdk
echo $JAVA_HOME

}

#下载hadoop
function download_hodoop(){
wget http://public.feiyuanxing.com/hadoop/hadoop-2.7.1_x64.tar.gz
}

function configuration_ssh(){
#设置本机免密码登录
(echo -e "\n"
sleep 1
echo -e "\n"
sleep 1
echo -e "\n")|ssh-keygen -t rsa
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys

}

function configure_hadoop(){
#最终生成的文件名为install_hadoop.bin而我们的all.tar.gz被>>到该文件后面
#tail -c $size install_hadoop.bin >all.tar.gz
rm -rf hadoop
tar -zxf hadoop-2.7.1_x64.tar.gz
pwd
mv hadoop-2.7.1 hadoop && cd hadoop

echo "正在安装.请稍等..."

#设置环境变量
hadoop_home_test=`echo "${HADOOP_HOME}"`

if [ -z ${hadoop_home_test} ] ;then
echo export HADOOP_HOME=${ROOT_HOME}/hadoop >> /etc/profile
echo export PATH=$PATH:${HADOOP_HOME}/bin:${HADOOP_HOME}/sbin >> /etc/profile
#使得环境变量生效
source /etc/profile
echo "hadoop 环境变量已存在..."
fi

#通过强大的sed命令来修改hadoop的配置文件
jdk_home=`echo $JAVA_HOME`
if [ -z ${jdk_home} ] ;then
#安装JDK
echo "安装JDK"
fi

sed -i "s!\${JAVA_HOME}!$(echo ${jdk_home})!g" ${ROOT_HOME}/etc/hadoop/hadoop-env.sh
sed -i "/<configuration>/a\<property\>\n\<name\>fs.default.name\<\/name\>\n\<value\>hdfs://localhost:9000\<\/value\>\n\<\/property\>\n\<property\>\n\<name\>hadoop.tmp.dir\<\/name\>\n\<value\>$(echo ${hadoop_tmp})\<\/value\>\n\</property\>" ${ROOT_HOME}/etc/hadoop/core-site.xml
cp ${ROOT_HOME}/etc/hadoop/mapred-site.xml.template ${ROOT_HOME}/etc/hadoop/mapred-site.xml
sed -i '/<configuration>/a\<property\>\n\<name\>mapred.job.tracker\</name\>\n\<value\>localhost:9001\</value\>\n\</property\>' ${ROOT_HOME}/etc/hadoop/mapred-site.xml
sed -i '/<configuration>/a\\<property\>\n\<name\>dfs.replication\</name\>\n\<value\>1\</value\>\n\</property\>' ${ROOT_HOME}/etc/hadoop/hdfs-site.xml

chown -R work:work ${INSTALL_HOME}
echo "hadoop安装完成,开始格式化。。。"

}

function start_hadoop(){
#格式化hadoop
hadoop namenode -format
echo "格式化完成..开始运行"
#启动
start-all.sh

}
#add_work_user
download_hodoop;
#configuration_ssh
configure_hadoop;

exit

QQ9715234