Overview
The script [update_dynamic_ip.py] is designed to manage syncing the external ip address (that is, the ip address the world sees, as viewed from myexternalip.com) of the machine the script is run on with a google cloud dns managed zone.
Requirements
- google-api-python-client
- Google Cloud Platform Project (with CloudDNS enabled)
- Valid client secrets json file (instructions)
Getting Started
- Run the script once to setup OAuth permissions
- Schedule the script to run (cron)
Usage
usage: update_dynamic_ip.py project_name zone sub_domain
Program Flow
- List all records in the managed zone
- Check that there is an SOA record
- Check if there is an existing sub-domain record
- Query for external ip address from myexternalip.com
- Check to see if our ip has changed
- Create a new SOA record (with increased serial number)
- Create new A record for the given subdomain
- Send change request