DNS服务作为生产环境的中必备的两个服务之一,是必须要部署的。在centos的base仓库中带有的bind可以做到简单的DNS服务的实现。但是PowerDns提供了一个非常通俗易懂的web界面,即使是没有部署过的小白用户也能够轻易上手。PowerDNS 是一个跨平台的开源DNS服务组件,它是高性能的域名服务器,除了支持普通的BIND配置文件,PowerDNS还可以从MySQL,Oracle,PostgreSQL等的数据库读取数据等。

部署环境准备

关闭selinux和防火墙

[root@dns ~]#setenforce 0
[root@dns ~]#systemctl stop firewalld
[root@dns ~]#systemctl disable firewalld

配置yum源

[root@dns ~]#mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
[root@dns ~]#wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
[root@dns ~]#yum install -y epel-release

部署Mariadb数据库存储PowerDNS的后端数据

安装mariadb服务

[root@dns ~]#yum install -y mariadb-server

修改配置文件

[root@dns ~]#vim /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
symbolic-links=0
#更改字符集和禁止主机名解析
init_connect='SET collation_connection = utf8_unicode_ci'
init_connect='SET NAMES utf8'
character-set-server=utf8
collation-server=utf8_unicode_ci
skip-character-set-client-handshake
skip_name_resolve=on

[mysqld_safe]
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid
!includedir /etc/my.cnf.d

启动服务

[root@dns ~]#systemctl enable mariadb.service
[root@dns ~]#systemctl start mariadb.service

查看字符集是否修改成功

[root@dns ~]#mysql
MariaDB [(none)]> show variables like "%character%";show variables like "%collation%";
+--------------------------+----------------------------+
| Variable_name            | Value                      |
+--------------------------+----------------------------+
| character_set_client     | utf8                       |
| character_set_connection | utf8                       |
| character_set_database   | utf8                       |
| character_set_filesystem | binary                     |
| character_set_results    | utf8                       |
| character_set_server     | utf8                       |
| character_set_system     | utf8                       |
| character_sets_dir       | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)

+----------------------+-----------------+
| Variable_name        | Value           |
+----------------------+-----------------+
| collation_connection | utf8_unicode_ci |
| collation_database   | utf8_unicode_ci |
| collation_server     | utf8_unicode_ci |
+----------------------+-----------------+

创建powerdns数据库

MariaDB [(none)]> CREATE DATABASE powerdns;
MariaDB [(none)]> GRANT ALL ON powerdns.* TO 'powerdns'@'localhost' IDENTIFIED BY 'centos';
MariaDB [(none)]> FLUSH PRIVILEGES;

创建必要的数据库表

#以下全部复制至数据库命令行中即可
MariaDB [(none)]>use powerdns;
CREATE TABLE domains (
  id                    INT AUTO_INCREMENT,
  name                  VARCHAR(255) NOT NULL,
  master                VARCHAR(128) DEFAULT NULL,
  last_check            INT DEFAULT NULL,
  type                  VARCHAR(6) NOT NULL,
  notified_serial       INT DEFAULT NULL,
  account               VARCHAR(40) DEFAULT NULL,
  PRIMARY KEY (id)
) Engine=InnoDB;

CREATE UNIQUE INDEX name_index ON domains(name);

CREATE TABLE records (
  id                    BIGINT AUTO_INCREMENT,
  domain_id             INT DEFAULT NULL,
  name                  VARCHAR(255) DEFAULT NULL,
  type                  VARCHAR(10) DEFAULT NULL,
  content               VARCHAR(64000) DEFAULT NULL,
  ttl                   INT DEFAULT NULL,
  prio                  INT DEFAULT NULL,
  change_date           INT DEFAULT NULL,
  disabled              TINYINT(1) DEFAULT 0,
  ordername             VARCHAR(255) BINARY DEFAULT NULL,
  auth                  TINYINT(1) DEFAULT 1,
  PRIMARY KEY (id)
) Engine=InnoDB;

CREATE INDEX nametype_index ON records(name,type);
CREATE INDEX domain_id ON records(domain_id);
CREATE INDEX recordorder ON records (domain_id, ordername);

CREATE TABLE supermasters (
  ip                    VARCHAR(64) NOT NULL,
  nameserver            VARCHAR(255) NOT NULL,
  account               VARCHAR(40) NOT NULL,
  PRIMARY KEY (ip, nameserver)
) Engine=InnoDB;

CREATE TABLE comments (
  id                    INT AUTO_INCREMENT,
  domain_id             INT NOT NULL,
  name                  VARCHAR(255) NOT NULL,
  type                  VARCHAR(10) NOT NULL,
  modified_at           INT NOT NULL,
  account               VARCHAR(40) NOT NULL,
  comment               VARCHAR(64000) NOT NULL,
  PRIMARY KEY (id)
) Engine=InnoDB;

CREATE INDEX comments_domain_id_idx ON comments (domain_id);
CREATE INDEX comments_name_type_idx ON comments (name, type);
CREATE INDEX comments_order_idx ON comments (domain_id, modified_at);

CREATE TABLE domainmetadata (
  id                    INT AUTO_INCREMENT,
  domain_id             INT NOT NULL,
  kind                  VARCHAR(32),
  content               TEXT,
  PRIMARY KEY (id)
) Engine=InnoDB;

CREATE INDEX domainmetadata_idx ON domainmetadata (domain_id, kind);

CREATE TABLE cryptokeys (
  id                    INT AUTO_INCREMENT,
  domain_id             INT NOT NULL,
  flags                 INT NOT NULL,
  active                BOOL,
  content               TEXT,
  PRIMARY KEY(id)
) Engine=InnoDB;

CREATE INDEX domainidindex ON cryptokeys(domain_id);

CREATE TABLE tsigkeys (
  id                    INT AUTO_INCREMENT,
  name                  VARCHAR(255),
  algorithm             VARCHAR(50),
  secret                VARCHAR(255),
  PRIMARY KEY (id)
) Engine=InnoDB;

CREATE UNIQUE INDEX namealgoindex ON tsigkeys(name, algorithm);

flush privileges;

检查所有的表是否创建成功

MariaDB [powerdns]> show tables;
+--------------------+
| Tables_in_powerdns |
+--------------------+
| comments           |
| cryptokeys         |
| domainmetadata     |
| domains            |
| records            |
| supermasters       |
| tsigkeys           |
+--------------------+

检查下使用powerdns是否正常登录

[root@dns ~]#mysql -upowerdns -hlocalhost -pcentos;
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 5
Server version: 5.5.56-MariaDB MariaDB Server

Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| powerdns           |
+--------------------+
2 rows in set (0.00 sec)

MariaDB [(none)]> use powerdns;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
MariaDB [powerdns]> show tables;
+--------------------+
| Tables_in_powerdns |
+--------------------+
| comments           |
| cryptokeys         |
| domainmetadata     |
| domains            |
| records            |
| supermasters       |
| tsigkeys           |
+--------------------+
7 rows in set (0.00 sec)

安装并配置PowerDNS

安装PowerDNS

[root@dns ~]#yum install -y pdns pdns-backend-mysql

更改配置文件

[root@dns ~]#vim /etc/pdns/pdns.conf
launch=gmysql
gmysql-host=localhost
gmysql-port=3306
gmysql-dbname=powerdns
gmysql-user=powerdns
gmysql-password=centos

启动服务

[root@dns ~]#systemctl enable pdns.service
[root@dns ~]#systemctl start pdns.service

安装PowerAdmin来管理PowerDNS

安装必要的软件包

[root@dns ~]#yum -y install httpd php php-devel php-gd php-mcrypt php-imap php-ldap php-mysql php-odbc php-pear php-xml php-xmlrpc php-mbstring php-mcrypt php-mhash gettext

启动http服务

[root@dns ~]#systemctl start httpd.service
[root@dns ~]#systemctl enable httpd.service

下载poweradmin放置到http的工作目录中

[root@dns ~]#cd /var/www/html/
[root@dns ~]#wget http://downloads.sourceforge.net/project/poweradmin/poweradmin-2.1.7.tgz
[root@dns ~]#tar xf poweradmin-2.1.7.tgz
[root@dns html]#mv poweradmin-2.1.7 dns

安装poweradmin,访问网页http://192.168.8.134/dns/install/
Centos7.6下部署PowerDNS
Centos7.6下部署PowerDNS
Centos7.6下部署PowerDNS
Centos7.6下部署PowerDNS
Centos7.6下部署PowerDNS
Centos7.6下部署PowerDNS
把上面的文件写入到文件中

[root@dns html]#vim dns/inc/config.inc.php
<?php

$db_host        = 'localhost';
$db_user        = 'poweradmin';
$db_pass        = 'poweradmin';
$db_name        = 'powerdns';
$db_type        = 'mysql';
$db_layer       = 'PDO';

$session_key        = 'Be@K~!&IN8i58qlp2B(bEMTxZ3DmdHJYIqOref%C&u@$yh';

$iface_lang     = 'en_EN';

$dns_hostmaster     = '';
$dns_ns1        = '192.168.8.134';
$dns_ns2        = '192.168.8.134';

删除安装目录

[root@dns html]#rm dns/install/* -rf

登录界面

账号admin,密码为上面设置的密码123456
Centos7.6下部署PowerDNS
Centos7.6下部署PowerDNS