#!/bin/bash

menu()

{

echo "---欢迎使用hadoop部署管理程序---"

echo "# 1.初始化Linux环境"

echo "# 2.配置jdk"

echo "# 3.配置ntpd时钟服务"

echo "# 4.配置zookeeper环境"

echo "# 5.配置hadoop环境"

echo "# 6.退出程序"

echo "-----------------------------"

}

choice()

{

  read -p "Please choice a menu[1‐9]:" select

}

install_linux(){

    mkdir /usr/app

    dir=/usr/app/software

    if [ ! -d ${dir} ]

    then

       mkdir /usr/app/software -p

    fi

    #设置主机名

    hostnamectl set-hostname cent

    sed -i 's/HOSTNAME=localhost.localdomain/HOSTNAME=cent/g' /etc/sysconfig/network

    echo "192.168.66.128 cent" >> /etc/hosts

    #关闭selinux

    sed -i  '/^SELINUX/s/=.*/=disabled/' /etc/selinux/config

    setenforce 0

    #关闭防火墙

    service iptables stop

    chkconfig iptables off

    #修改Linux系统的最大打开文件数量

    cat >> /etc/security/limits.conf <<EOF

    * soft nofile  65536

    * hard nofile  65536

EOF

}

install_jdk(){

    find /usr/app/software -type -f -name 'jdk*.tar.gz'

    if [ $? -eq 0 ]

    then

       tar xvf /usr/app/software/jdk*.tar.gz -C /usr/app

    mv jdk* jdk

    cat >> /etc/profile <<EOF

    export JAVA_HOME=/usr/app/jdk

    export PATH=$JAVA_HOME/bin:$PATH

    export CLASSPATH=$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib

EOF

    source /etc/profile

   else

      echo "请先上传jdk tar包"

    fi

}

install_ntpd(){

    yum -y install ntp

    service ntpd restart

    #ntpdate -u ntp1.aliyun.com ---配置阿里云时钟

    #如果是离线网络，则需要配置一台ntpd时钟，其他节点的同步这台时钟

}

install_zookeeper(){

   ls -ll /usr/app/software/zookeeper*.tar.gz

   if [ $? -eq 0 ]

   then

     tar xvf /usr/app/software/zookeeper*.tar.gz -C /usr/app

     mv zookeeper* zookeeper

     mv /usr/app/zookeeper/conf/zoo.cfg*  /usr/app/zookeeper/conf/zoo.cfg

     echo>/usr/app/zookeeper/conf/zoo.cfg

     mkdir /usr/app/zookeeper/data

     cat >> /usr/app/zookeeper/conf/zoo.cfg << EOF

     tickTime=2000

     initLimit=10

     syncLimit=5

     dataDir=/usr/app/zookeeper/data

     clientPort=2181

     maxClientCnxns=60

     server.1= cent:2888:3888

EOF

   else

      echo "请先上传zookeeper tar包"

   fi

}

install_hadoop(){

   echo "配置太多（hadoop-env.sh/core-site.xml/hdfs-site.xml/mapred-site.xml/yarn-site.xml/yarn-env.sh），此功能忽略"

}

while :

do

  menu

  choice

case $select in

1)

    install_linux;;

2)

    install_jdk;;

3)

    install_ntpd;;

4)

    install_zookeeper;;

5)

    install_hadoop;;

6)

    exit;;

*)

echo  "您输入的数字没有对应的菜单"

esac

done