dynamically set a GoDaddy DNS record

check-and-set-ip.sh

#!/bin/bash

domain="example.com"
aname="subdomain"
key="your_key"
secret="your_secret"

myip=`curl -s -X GET http://api.ipify.org?format=json | jq -r .ip`

recip=`curl -s -X GET "https://api.godaddy.com/v1/domains/$domain/records/A/$aname" -H "accept: application/json" -H "Authorization: sso-key $key:$secret" | jq -r .[0].data`

echo "my ip is $myip"
echo "A rec is $recip"

if [ "$myip" != "$recip" ]; then

    echo "ip does not match"
    newdata="[{\"data\":\"$myip\",\"ttl\":600}]"
    echo "new data is: $newdata"

    curl -s -X PUT "https://api.godaddy.com/v1/domains/$domain/records/A/$aname" -H "accept: application/json" -H "Content-Type: application/json" -H "Authorization: sso-key $key:$secret" -d "$newdata"

fi