Dynamic DNS updater for Cloudflare

Dynamically update DNS on Cloudflare through their API.

See the Cloudflare API documentation for information about how to get the values for your account

Make a file called ~/.ddns/cloudflare with the correct values for your DNS in this format:

API_ID="your_cloudflare_login@example.com"
API_AUTH_KEY="1234567890foo1234567890" # Get this from the API tokens tab in your account page
ZONE_NAME="your.domain.com"
ZONE_ID="123456789012345678901234567890" # Get this from your domain's overview page
DNSREC_ID="123456789012345678901234567890" # Get this by running this script with --list

The DNSREC_ID is the API's id of the record you want to update. You can find it if you look at all the records in your DNS zone through the API. One way of doing that is to run this script with the --list parameter:

ddns-cloudflare.sh --list

This script assumes jq is installed. Installation instructions for jq are beyond the scope of this README but, for example, on Ubuntu you'd type:

sudo snap install jq

Most of this script is cribbed from netphantm's miscellaneous scripts repository.