Dnsign is a dynamic DNS updater.
It's a simple command line tool that resolves your public IP address and accordingly updates DNS record on one of the currently supported (Linode, DigitalOcean) DNS services.
gem install dnsign
dnsign --config /path/to/config.yml
Example config:
dns_service: 'DigitalOcean' # [DigitalOcean|Linode]
dns_token: 'your access token from DNS service'
domain: 'foobar.example.com'
interval: 300 # refresh interval in seconds, defaults to 5 minutes
It's important that you already have domain on DNS service. Dnsign will periodically check your public IP and try to update or add DNS record to your domain.
For example above to work, there already must be example.com domain on DNS service and Dnsign will try to add/update A record foobar with currently public IP of the host it's running on.
It should be not to hard to add support for the other DNS services.
Just inherit Dnsign::DnsService and implement update_ip, retrieve_ip and optionally initializer methods. For example take a look at one of the existing services.