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cyrusboadway/google-domains-dynamic-dns-update.sh

Created February 20, 2016 17:21
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Script to update a Google Domains DNS record
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google-domains-dynamic-dns-update.sh
#!/bin/bash
### Google Domains provides an API to update a DNS "Syntheitc record". This script
### updates a record with the script-runner's public IP, as resolved using a DNS
### lookup.
###
### Google Dynamic DNS: https://support.google.com/domains/answer/6147083
### Synthetic Records: https://support.google.com/domains/answer/6069273
USERNAME=""
PASSWORD=""
HOSTNAME="yoursubdomain.yourdomain.here"
# Resolve current public IP
IP=$( dig +short myip.opendns.com @resolver1.opendns.com )
# Update Google DNS Record
URL="https://${USERNAME}:${PASSWORD}@domains.google.com/nic/update?hostname=${HOSTNAME}&myip=${IP}"
curl -s $URL
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