Linux - Bash - Update AWS Route53 DNS with public IP

update_ip

# Update a DNS record with the public IP
# Use a CRON
# chmod +x update_ip
# Run: source update_ip
#!/bin/bash

current_ip=$CURRENT_IP

new_ip=$(curl -s https://api.ipify.org)
new_ip_validation=$(curl -s https://checkip.amazonaws.com)

if [[ $new_ip == $new_ip_validation && $current_ip != $new_ip ]]
then
    aws route53 change-resource-record-sets \
                --hosted-zone-id <HOSTEZONEID> \
                --change-batch '{"Changes":[{"Action":"UPSERT","ResourceRecordSet":{"Name":"<DNSRECORDNAME>","Type":"[A|CNAME|...]","TTL":60,"ResourceRecords":[{"Value":"'$new_ip'"}]}}]}'
    export CURRENT_IP=$new_ip
fi