bind9+mysql搭建高可用DNS解析服务

bind9+mysql搭建DNS解析服务

基本的架构图如下：

安装步骤：

1. 安装依赖服务：

yum install wget cmake ncurses boost zlib gcc libuv libuv-devel libnghttp2 libnghttp2-devel openssl-devel libcap-devel mysql mysql-devel -y

1. 安装mysql
   此处省略安装配置mysql主从~~
   mysql安装完成后需要添加环境变量，编译bind时会用到

export CPPFLAGS="-I/usr/lib64/mysql $CPPFLAGS"
export LDFLAGS="-L/usr/lib64/mysql $LDFLAGS"
export LD_LIBRARY_PATH="/usr/lib64/mysql"

mysql建表命令

CREATE TABLE IF NOT EXISTS `dns_records` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `zone` varchar(255) NOT NULL,
  `host` varchar(255) NOT NULL DEFAULT '@',
  `type` enum('A','MX','CNAME','NS','SOA','PTR','TXT','AAAA','SVR','URL') NOT NULL,
  `data` varchar(255) DEFAULT NULL,
  `ttl` int(11) NOT NULL DEFAULT '3600',
  `mx_priority` int(11) DEFAULT NULL,
  `view`  enum('any', 'Telecom', 'Unicom', 'CMCC', 'ours') NOT NULL  DEFAULT "any" ,
  `priority` tinyint UNSIGNED NOT NULL DEFAULT '255',
  `refresh` int(11) NOT NULL DEFAULT '28800',
  `retry` int(11) NOT NULL DEFAULT '14400',
  `expire` int(11) NOT NULL DEFAULT '86400',
  `minimum` int(11) NOT NULL DEFAULT '86400',
  `serial` bigint(20) NOT NULL DEFAULT '2022022317',
  `resp_person` varchar(64) NOT NULL DEFAULT 'localhost',
  `primary_ns` varchar(64) NOT NULL DEFAULT 'localhost.',
  PRIMARY KEY (`id`),
  KEY `type` (`type`),
  KEY `host` (`host`),
  KEY `zone` (`zone`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

后续添加DNS解析的命令

insert into dns_bind.dns_records (zone, host, type, data, ttl) VALUES ('testinfo.local', 'aaa', 'A', 'xxx.xxx.xxx.xxx', '600');

1. 编译安装bind服务
   下载安装包

cd /usr/local/src/
wget https://www.cpan.org/src/5.0/perl-5.34.0.tar.gz
wget wget https://ftp.isc.org/isc/bind9/9.16.26/bind-9.16.26.tar.xz

编译安装perl ， 这里make test的时候会报一个错误，无视他，继续make install就行

tar -zxvf perl-5.34.0.tar.gz
cd perl-5.34.0
cp configure.gnu configure
./configure -des -Dprefix=/usr/local/perl
make
make test
make install

编译安装bind服务

tar -xvf bind-9.16.26.tar.xz
cd bind-9.16.26
./configure --prefix=/data/bind/ --with-dlz-mysql=yes --enable-largefile --with-openssl=no --without-python --disable-ipv6
make
make install

注意：bind9.16是最后支持mysql的版本，9.17开始就移除了mysql模块

1. 生成rndc.conf和named.conf

cd /data/bind/etc/
/data/bind/sbin/rndc-confgen > rndc.conf
tail -10 rndc.conf | head -9 | sed s/#\ //g > named.conf
../bin/dig > named.root

1. 配置named.conf
   配置options

options {
        listen-on port 53 { any; };
        directory       "/data/bind";
        dump-file       "/data/bind/data/cache_dump.db";
        statistics-file "/data/bind/data/named_stats.txt";
        memstatistics-file "/data/bind/data/named_mem_stats.txt";
        Pid-file "/data/bind/var/run/named/named.pid";
        allow-query     { any; };
        recursion yes;
        version "0";
        serial-query-rate 1;
        dnssec-enable no;
        dnssec-validation no;
        dnssec-lookaside auto;
        managed-keys-directory "/data/bind/dynamic";
        forwarders { 223.5.5.5;223.6.6.6; };
};

配置zone

dlz "mysql zone" {
database "mysql
{host=XXX.XXX.XXX.XXX dbname=dns_bind ssl=false port=3306 user=root pass=XXXXXXXX}
{select zone from dns_records where zone = '$zone$' and  view = 'any' limit 1}
{select ttl,type,if(mx_priority>0,mx_priority,NULL),case when lower(type)='txt' then concat('\"',data,'\"') when lower(type)    =  'soa'  then   concat_ws(' ',  data,  resp_person,  serial,  refresh,  retry,  expire,  minimum)   else   data   end   as   mydata   from   dns_records where zone = '$zone$'   and host = '$record$' and view = 'any'}";
};

到这里就安装完成了。

附1：bind检测配置文件命令

/usr/local/bind/sbin/named -c /usr/local/bind/etc/named.conf -g

附2：bind启动脚本

#!/bin/bash
##########################################################################################
#  Info:
#  start dns server
##########################################################################################
#  Auther: Yin Jiang
#  Changelog:
#  20220223   jiangyin  initial create
##########################################################################################

##########################################################################################

if [ `id -u` -ne 0 ]
then
echo "ERROR:Must run as root."
exit 1
fi

function start() {
  /data/bind/sbin/named -c /data/bind/etc/named.conf -4
  echo . && echo 'DNS server started.'
}

function stop() {
  kill `cat /data/bind/var/run/named/named.pid`
  echo . && echo 'DNS server stopped.'
}

function reload() {
  /data/bind/sbin/rndc reload
}

function status() {
  /data/bind/sbin/rndc status
}

case "$1" in
  start)
  start
  ;;
  stop)
  stop
  ;;
  restart)
  stop
  sleep 2
  start
  ;;
  reload)
  reload
  ;;
  status)
  status
  ;;
  *)
  echo "Please use these command (start | stop | restart | status | reload)"
  ;;
esac