http://www.misdivision.com/blog/create-your-own-dynamic-dns-service-using-powerdns-and-mysql

http://gnudip2.sourceforge.net

Here we provide a dynamic DNS service using PowerDNS and MySQL.

yum install pdns pdns-backend-mysql mysql-server vim-enhanced

chkconfig mysqld on
service mysqld start
mysqladmin -u root password 'new-password'
mysqladmin -u root -h <your-server-fqdn> password 'new-password'