Installing PowerDNS (With MySQL Backend) And Poweradmin On Ubuntu 8.10

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Submitted by falko (Contact Author) (Forums) on Wed, 2009-01-28 18:50. :: PowerDNS | Ubuntu | DNS

Installing PowerDNS (With MySQL Backend) And Poweradmin On Ubuntu 8.10

Version 1.0
Author: Falko Timme <ft [at] falkotimme [dot] com>
Last edited 01/15/2009

This article shows how you can install the PowerDNS nameserver (with MySQL backend) and the Poweradmin control panel for PowerDNS on an Ubuntu 8.10 system. PowerDNS is a high-performance, authoritative-only nameserver - in the setup described here it will read the DNS records from a MySQL database (similar to MyDNS), although other backends such as PostgreSQL are supported as well. Poweradmin is a web-based control panel for PowerDNS.

I do not issue any guarantee that this will work for you!

 

1 Preliminary Note

In this example I'm using an Ubuntu 8.10 host with the hostname server1.example.com and the IP address 192.168.0.100, set up according to the first 10 chapters of this tutorial: The Perfect Server - Ubuntu Intrepid Ibex (Ubuntu 8.10).

I will set up just one PowerDNS server in this example (a master); adding PowerDNS slave(s) can easily be achieved by using MySQL database replication from the master to the slave(s), therefore no zone transfers are needed (this again is similar to MyDNS). MySQL database replication can be set up according to this tutorial: How To Set Up Database Replication In MySQL (PowerDNS also supports native zone transfers (for scenarios where you cannot use MySQL replication) - see http://downloads.powerdns.com/documentation/html/replication.html).

Because we must run all the steps from this tutorial with root privileges, we can either prepend all commands in this tutorial with the string sudo, or we become root right now by typing

sudo su

 

2 Installing MySQL

In order to install MySQL, we run

apt-get install mysql-server mysql-client

You will be asked to provide a password for the MySQL root user - this password is valid for the user root@localhost as well as root@server1.example.com, so we don't have to specify a MySQL root password manually later on (as was the case with previous Ubuntu versions):

New password for the MySQL "root" user: <-- yourrootsqlpassword
Repeat password for the MySQL "root" user: <-- yourrootsqlpassword

We want MySQL to listen on all interfaces (this is important for MySQL replication!), not just localhost, therefore we edit /etc/mysql/my.cnf and comment out the line bind-address = 127.0.0.1:

vi /etc/mysql/my.cnf

[...]
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
#bind-address
[...]

Then we restart MySQL:

/etc/init.d/mysql restart

Now check that networking is enabled. Run

netstat -tap | grep mysql

The output should look like this:

root@server1:~# netstat -tap | grep mysql
tcp        0      0 *:mysql                 *:*                     LISTEN      6724/mysqld
root@server1:~#

 

3 Installing PowerDNS

To install PowerDNS, we run

apt-get install pdns-server pdns-backend-mysql

The PowerDNS configuration is located in the /etc/powerdns directory - I'll come to that in a moment.

Now we connect to MySQL:

mysql -u root -p

Type in your MySQL root password, and you should be on the MySQL shell. On the MySQL shell, we create a database for PowerDNS:

CREATE DATABASE powerdns;

Next we create a database user (powerdns) for PowerDNS:

GRANT ALL ON powerdns.* TO 'power_admin'@'localhost' IDENTIFIED BY 'power_admin_password';
GRANT ALL ON powerdns.* TO 'power_admin'@'localhost.localdomain' IDENTIFIED BY 'power_admin_password';
FLUSH PRIVILEGES;

(Replace power_admin_password with a password of your choice.)

Now we create the tables needed by PowerDNS...

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)
);

CREATE UNIQUE INDEX name_index ON domains(name);

CREATE TABLE records (
id INT auto_increment,
domain_id INT DEFAULT NULL,
name VARCHAR(255) DEFAULT NULL,
type VARCHAR(6) DEFAULT NULL,
content VARCHAR(255) DEFAULT NULL,
ttl INT DEFAULT NULL,
prio INT DEFAULT NULL,
change_date INT DEFAULT NULL,
primary key(id)
);

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

CREATE TABLE supermasters (
ip VARCHAR(25) NOT NULL,
nameserver VARCHAR(255) NOT NULL,
account VARCHAR(40) DEFAULT NULL
);

... and finally leave the MySQL shell:

quit;

Now we must configure PowerDNS so that it uses the MySQL backend:

vi /etc/powerdns/pdns.conf

Add the line launch=gmysql to pdns.conf:

[...]
#################################
# launch        Which backends to launch and order to query them in
#
# launch=
launch=gmysql
[...]

Then open /etc/powerdns/pdns.d/pdns.local and make it look as follows:

vi /etc/powerdns/pdns.d/pdns.local

# Here comes the local changes the user made, like configuration of
# the several backends that exists.

gmysql-host=127.0.0.1
gmysql-user=power_admin
gmysql-password=power_admin_password
gmysql-dbname=powerdns

Then restart pdns:

/etc/init.d/pdns restart

That's it, PowerDNS is now ready to be used. To learn more about it, please refer to its documentation: http://downloads.powerdns.com/documentation/html/index.html

 

4 Installing Poweradmin

Now let's install Poweradmin, a web-based control panel for PowerDNS. Poweradmin is written in PHP, so we must install a web server (I'm using Apache2 in this example) and PHP:

apt-get install apache2 libapache2-mod-php5 php5 php5-common php5-curl php5-dev php5-gd php-pear php5-imap php5-mcrypt php5-mhash php5-ming php5-mysql php5-xmlrpc gettext

Poweradmin also requires the following two PEAR packages:

pear install DB

pear install pear/MDB2#mysql

Restart Apache:

/etc/init.d/apache2 restart

Now all prerequisites for Poweradmin are installed, and we can begin with the Poweradmin installation (I will install it in a subdirectory of /var/www - /var/www is the document root of Apache's default web site on Ubuntu; if you've created a vhost with a different document root, please adjust the paths).

Go to https://www.poweradmin.org/trac/wiki/GettingPoweradmin and download the latest Poweradmin package, e.g. as follows:

cd /tmp
wget https://www.poweradmin.org/download/poweradmin-2.1.2.tgz

Then install it to the /var/www/poweradmin directory as follows:

tar xvfz poweradmin-2.1.2.tgz
mv poweradmin-2.1.2 /var/www/poweradmin
touch /var/www/poweradmin/inc/config.inc.php
chown -R www-data:www-data /var/www/poweradmin/

Now open a browser and launch the web-based Poweradmin installer (http://server1.example.com/poweradmin/install or http://192.168.0.100/poweradmin/install).

Select your language (English or Dutch):

Click on the Go to step 3 button to proceed:


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Submitted by Some Guy (not registered) on Wed, 2009-05-27 19:07.

Hello, great article! I would recommend 2 small changes on the create table code however. According to the PowerDNS docs, you will get better performance by using InnoDB. From the page http://doc.powerdns.com/generic-mypgsql-backends.html: In practice, great results are achieved with the 'InnoDB' tables. PowerDNS will silently function with non-transaction aware MySQLs but at one point this is going to harm your database, for example when an incoming zone transfer fails. In order to do this, you would change the domain create statement to read: 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; To create the records table as InnoDB, do the following: CREATE TABLE records ( id INT auto_increment, domain_id INT DEFAULT NULL, name VARCHAR(255) DEFAULT NULL, type VARCHAR(6) DEFAULT NULL, content VARCHAR(255) DEFAULT NULL, ttl INT DEFAULT NULL, prio INT DEFAULT NULL, change_date INT DEFAULT NULL, primary key(id) )engine=InnoDB; Additionally, you can create cascading restraints on different fields... In plain english, you can have MySQL automatically delete records in the records table that are associated with a domain that has been deleted. To add this constraint, instead use the following create statement for the records table: CREATE TABLE records ( id INT auto_increment, domain_id INT DEFAULT NULL, name VARCHAR(255) DEFAULT NULL, type VARCHAR(6) DEFAULT NULL, content VARCHAR(255) DEFAULT NULL, ttl INT DEFAULT NULL, prio INT DEFAULT NULL, change_date INT DEFAULT NULL, primary key(id), CONSTRAINT `records_ibfk_1` FOREIGN KEY (`domain_id`) REFERENCES `domains` (`id`) ON DELETE CASCADE )engine=InnoDB; I have set my environment up this way and have no complaints, but your milage may vary. Either way, I just wanted to give an alternative that people may find useful.