bind-dlz结合mysql实现智能DNS

安装mysql

• yum install gcc gcc-c++ openssl-devel wget ncurses-devel make

• groupadd mysql

• useradd -g mysql mysql -s /sbin/nologin

• cd /tmp

• wget http://cdn.mysql.com/Downloads/MySQL-5.1/mysql-5.1.65.tar.gz

• tar xzf mysql-5.1.65.tar.gz

• cd mysql-5.1.65

• ./configure --prefix=/usr/local/mysql/ --without-pthread --with-unix-socket-path=/tmp/mysql.sock --with-extra-charsets=gbk,gb2312,utf8

• make

• make install

• cp support-files/my-medium.cnf /etc/my.cnf

• /usr/local/mysql/bin/mysql_install_db --user=mysql

• chown -R root.mysql /usr/local/mysql

• chown -R mysql /usr/local/mysql/var

• cp support-files/mysql.server /etc/init.d/mysqld

• chown root.root /etc/rc.d/init.d/mysqld

• chmod 755 /etc/rc.d/init.d/mysqld

• chkconfig --add mysqld

• chkconfig  mysqld on

• ln -s /usr/local/mysql/bin/mysql /usr/bin

• ln -s /usr/local/mysql/bin/mysqladmin /usr/bin

• service mysqld start

• mysqladmin -u root password root
  

安装bind

• cd /tmp

• wget http://ftp.isc.org/isc/bind9/cur/9.9/bind-9.9.1-P2.tar.gz

• tar xzf bind-9.9.1-P2.tar.gz

• cd bind-9.9.1-P2

• ./configure --prefix=/usr/local/bind/ --disable-openssl-version-check --with-dlz-mysql=/usr/local/mysql

• make

• make install
  

配置bind

• cd /usr/local/bind/etc

• ../sbin/rndc-confgen -r /dev/urandom >rndc.conf

• tail -n10 rndc.conf | head -n9 | sed -e s/#\//g>named.conf

• 
  

• vi named.conf

• 在后面增加：

• include "/usr/local/bind/etc/CHINANET.acl"; //联通ACL

• include "/usr/local/bind/etc/CNC.acl"; //电信ACL

• include "/usr/local/bind/etc/view.conf"; //DLZ相关的配置
  

下载acl文件：

• wget http://www.centos.bz/wp-content/uploads/2012/02/CHINANET.acl

• wget http://www.centos.bz/wp-content/uploads/2012/02/CNC.acl
  

view.conf内容：
其中需要修改的字段为user=root pass=root，即此处mysql用户为root，密码为root。

• view "CHINANET_view" {

•  match-clients  { CHINANET; };

•  allow-query-cache { none; };

•  allow-recursion { none; };

•  allow-transfer { none; };

•  recursion no;

• 
  

•    dlz "Mysql zone" {

•    database "mysql

•    {host=127.0.0.1 dbname=dns_data ssl=false port=3306 user=root pass=root}

•    {select zone from dns_records where zone = '$zone$' and  view = 'any' limit 1}

•    {select ttl,type,mx_priority,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=(select view from dns_records where zone = '$zone$' and host = '$record$' and (view='CHINANET' or view='any') order by priority asc limit 1)}";

• };

• };

• view "CNC_view" {

•  match-clients  { CNC; };

•  allow-query-cache { none; };

•  allow-recursion { none; };

•  allow-transfer { none; };

•  recursion no;

• 
  

•    dlz "Mysql zone" {

•    database "mysql

•    {host=127.0.0.1 dbname=dns_data ssl=false port=3306 user=root pass=root}

•    {select zone from dns_records where zone = '$zone$' and  view = 'any' limit 1}

•    {select ttl,type,mx_priority,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=(select view from dns_records where zone = '$zone$' and host = '$record$' and (view='CNC' or view='any') order by priority asc limit 1)}";

• };

• };

• view "any_view" {

•  match-clients  { any; };

•  allow-query-cache { none; };

•  allow-recursion { none; };

•  allow-transfer { none; };

•  recursion no;

• 
  

•    dlz "Mysql zone" {

•    database "mysql

•    {host=127.0.0.1 dbname=dns_data ssl=false port=3306 user=root pass=root}

•    {select zone from dns_records where zone = '$zone$' and  view = 'any' limit 1}

•    {select ttl,type,mx_priority,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'}";

• };

• };
  

数据库配置

• mysql>create database dns_data;        //创建数据库名为 dns_data

•   mysql>use dns_data;

•   DROP TABLE IF EXISTS `dns_records`;

• CREATE TABLE `dns_records` (

•   `id` int(10) unsigned NOT NULL auto_increment,

•   `zone` varchar(255) NOT NULL,

•   `host` varchar(255) NOT NULL default '@',

•   `type` enum('MX','CNAME','NS','SOA','A','PTR') NOT NULL,

•   `data` varchar(255) default NULL,

•   `ttl` int(11) NOT NULL default '800',

•   `view` char(20) default 'any',     //any 代表默认，SOA 查询需，其它可以分，CNC……

•   `mx_priority` int(11) default NULL,

•   `priority` int(3) default 255,  //any为255，其它如CNC,CHINANET等线路为200

•   `refresh` int(11) NOT NULL default '3600',

•   `retry` int(11) NOT NULL default '3600',

•   `expire` int(11) NOT NULL default '86400',

•   `minimum` int(11) NOT NULL default '3600',

•   `serial` bigint(20) NOT NULL default '2008082700',

•   `resp_person` varchar(64) NOT NULL default 'root.domain.com.',

•   `primary_ns` varchar(64) NOT NULL default 'ns1.domain.com.',

•   `data_count` int(11) NOT NULL default '0',

•   PRIMARY KEY          (`id`),

•   KEY `type` (`type`),

•   KEY `host` (`host`),

•   KEY `zone` (`zone`)

• ) ENGINE=MyISAM AUTO_INCREMENT=1 DEFAULT CHARSET=gbk;
  

启动bind服务

# /usr/local/bind/sbin/named -uroot -g -d 9 //调试状态，如果没有报错说明环境配置正确。
做成启动服务. Debug 的时候多用此模式启动bind.
# /usr/local/bind/sbin/rndc reload 重载 named.conf 相关配置文件.
# /usr/local/bind/sbin/named -uroot -c /usr/local/bind/etc/named.conf 启动 bind 服务.

#插入记录的sql实例

• --SOA

• 
  

•     INSERT   INTO   `dns_records`   (`zone`,   `host`,   `type`,   `data`,   `ttl`,`mx_priority`,   `refresh`,   `retry`,   `expire`,      `minimum`, `serial`, `resp_person`, `primary_ns`, `data_count`) VALUES    ('centos.bz',     '@',   'SOA',   'ns1.centos.bz.',    10,   NULL,     3600,    3600,   86400,    10,   2008082700, 'root.centos.bz.', 'ns1.centos.bz.', 0);

• 
  

•     --@ NS

• 
  

•     INSERT INTO `dns_records` (`zone`, `host`, `type`, `data`) VALUES      ('centos.bz', '@', 'NS', 'ns1.centos.bz.'),      ('centos.bz', '@', 'NS', 'ns2.centos.bz.');

• 
  

•     --NS A

• 
  

•     INSERT INTO `dns_records` (`zone`, `host`, `type`, `data`) VALUES      ('centos.bz', 'ns1', 'A', '211.100.72.137'),   ('centos.bz', 'ns2', 'A', '219.232.244.11');

• 
  

•     --A

• 
  

•     INSERT INTO `dns_records` (`zone`, `host`, `type`, `data`, `ttl`, `view`,`priority`) VALUES   ('centos.bz', 'www', 'A', '210.51.36.116', 3600, 'CNC',200),      ('centos.bz', 'www', 'A', '221.238.249.178', 3600, 'CHINANET',200),      ('centos.bz', 'www', 'A', '211.103.156.230', 3600, 'any',255);

• 
  

•     --CNAME

• 
  

•     INSERT INTO dns_records (zone,host,type,DATA,view,,priority)      VALUES ('centos.bz', 'man', 'CNAME', 'www','CNC',200),      ('centos.bz', 'man', 'CNAME', 'www','CHINANET',200),  ('centos.bz', 'man', 'CNAME', 'www','any',255);
  

联通acl:http://www.centos.bz/wp-content/uploads/2012/02/CNC.acl
电信acl:http://www.centos.bz/wp-content/uploads/2012/02/CHINANET.acl