Shell脚本实战——DNS主从同步脚本实例

DNS主从同步脚本实例

PS：两个服务器起好后最好两个服务都重启一下

主服务器配置

#!/bin/bash
#DNS主从同步——主服务器

rpm -q bind
if [ $? -ne 0 ];then
    yum install bind -y
    systemctl start named
fi
#判断DNS服务是否安装

read -p "请输入主服务器地址：" zhu
read -p "请输入从服务器地址：" cong
read -p "域名（请带后缀）：" yu
quanju="/etc/named.conf"
quyu="/etc/named.rfc1912.zones"
[ ! -e $quanju.bak ] && cp $quanju $quanju.bak
sed -i -e "13s/127.0.0.1/$zhu/" -e '21s/localhost/any/' $quanju
[ ! -e $quyu.bak ] && cp $quyu $quyu.bak
#备份全局、区域配置文件

grep "$yu" $quyu &> /dev/null
while [ $? -ne 0 ];do
  sed -i "18azone \"$yu\" IN {\n  type master\;\n  file \"$yu.dns\"\;\n  allow-     transfer { $cong\; }\;\n}\;\n" $quyu
  peizhi="/var/named/$yu.dns"
cp -p /var/named/named.localhost $peizhi
done
#判断域名是否存在，如果不存在进行添加

sed -i -e '2d' -e "1a@       IN SOA  "$yu"\. admin\."$yu"\. (" /var/named/$yu.dns
sed -i '8d' /var/named/$yu.dns
sed -i '$d' /var/named/$yu.dns
sed -i -e "7a\      NS      $yu." -e "/A/s/127.0.0.1/$zhu/" /var/named/$yu.dns
#修改区域文件

while [ 1 -ge 0 ];do
read -p "请输入自定义指针(例：www IN A 8.8.8.8)" zhen
  echo $zhen >> /var/named/$yu.dns
  read -p "是否继续添加(y/n)" a
if [ $a != "y" ];then
  break
fi
done
#循环

systemctl stop firewalld.service
setenforce 0
systemctl restart named
jieguo=`systemctl status named | grep "active" &>/dev/null`
if [ $? -eq 0 ];then
  echo "服务启动"
else
  echo "启动失败"
fi
#判断服务是否能正常启动

sed -i -e '3d' -e "2anameserver $zhu" /etc/resolv.conf
#用于自检

从服务器配置

#!/bin/bash
#DNS主从同步——从服务器

rpm -q bind
if [ $? -ne 0 ];then
    yum install bind -y
fi
#判断DNS服务是否安装

read -p "请输入主服务器地址：" zhu
read -p "请输入从服务器地址：" cong
read -p "域名（请带后缀）：" yu
quanju="/etc/named.conf"
quyu="/etc/named.rfc1912.zones"
[ ! -e $quanju.bak ] && cp $quanju $quanju.bak
sed -i -e "13s/127.0.0.1/$cong/" -e '21s/localhost/any/' $quanju
[ ! -e $quyu.bak ] && cp $quyu $quyu.bak
#备份全局、区域配置文件

grep "$yu" $quyu &> /dev/null
while [ $? -ne 0 ];do
  sed -i "18azone \"$yu\" IN {\n  type slave\;\n  file \"slaves\/$yu.dns\"\;\n    masters { $zhu\; }\;\n}\;\n" $quyu
done
#判断域名是否存在，如果不存在进行添加

systemctl restart named
systemctl stop firewalld.service
setenforce 0
jieguo=`systemctl status named | grep "active" &>/dev/null`
if [ $? -eq 0 ];then
  echo "服务启动"
else
  echo "启动失败"
fi
#判断服务是否能正常启动