Shell脚本 - 快速部署正反向解析DNS服务

#!/bin/bash
#获取IP地址
export getIP=`ifconfig | grep "inet" | awk 'NR==1 {print $2}'`
export getcIP=`cIPUntil`
#检测光盘挂载
function cdrom(){
    
    
  df -h | grep "sr0" &> /dev/null
  if [ $? -eq 1 ];then
     mount /dev/cdrom /mnt &> /dev/null
	 bind=`ls /mnt/Packages | egrep "^bind-"[0-9]`
	 rpm /mnt/Packages/$bind
	 main
  else
     main
  fi
}
#检测DNS安装包
function dns(){
    
    
  rpm -q bind &> /dev/null
  if [ $? -eq 1 ];then
     yum -y install bind &> /dev/null
	 main
  else
     main
  fi
}
#检测网络
function network(){
    
    
  local timeout=1
  local target=www.baidu.com
  local status=`curl -I -s --connect-timeout ${
     
     timeout} ${
     
     target} -w %{
     
     http_code} | tail -n1`
  if [ "x$status" = "x200" ]; then
     return 1
  else
     return 0
  fi
  return 0
}
#IP反向解析库
function cIPUntil(){
    
    
	array=(`echo $getIP | tr "." " "`)
	length=${#array[@]}
	for ((i=0;i<length/2;i++)){
    
    
		backup=${array[$i]}
		array[$i]=${array[$length-$i-1]}
		array[$length-$i-1]=$backup
		unset array[3]
	}
	cIP=`echo ${
     
     array[@]} | tr " " "."`
	echo $cIP
}
#主代码
function main(){
    
    

	cp -p /etc/named.conf named.conf.bak
	sed -i 's/127.0.0.1/any/g' /etc/named.conf 
	sed -i 's/localhost/any/g' /etc/named.conf
	
	#用户输入
	read -p "请输入域名：" domain
	
	#正向解析
	echo -e "
	zone \"$domain\" IN {
	\ttype master;
	\tfile \"$domain.zone\";
	\tallow-update { none; };
	};
	" >> /etc/named.rfc1912.zones
	cd /var/named
	echo -e "$TTL 1D
@       IN SOA  $domain. admin.$domain. (
                                        0       ; serial
                                        1D      ; refresh
                                        1H      ; retry
                                        1W      ; expire
                                        3H )    ; minimum
        NS      $domain.
        A       $getIP
www IN  A       $getIP
	" > $domain.zone
	chown root:named $domain.zone
	
	#反向解析
	array=(`echo $getIP | tr "." " "`)
	last=${array[3]}
	echo -e "
	zone \"$getcIP.in-addr.arpa\" IN {
	\ttype master;
	\tfile \"$domain.local\";
	\tallow-update { none; };
	};
	" >> /etc/named.rfc1912.zones
	cd /var/named
	echo -e "$TTL 1D
@       IN SOA  $domain. admin.$domain. (
                                        0       ; serial
                                        1D      ; refresh
                                        1H      ; retry
                                        1W      ; expire
                                        3H )    ; minimum
        NS      $domain.
        A       $getIP
$last IN  A       www.$domain
	" > $domain.zone
	chown root:named $domain.zone
	
	systemctl start named
	echo "反向解析已经部署完毕！"
}
#################执行####################
network
if [ $? -eq 0 ];then
	cdrom
else
    dns
fi