update_dynamic_ip_route53.sh

#!/bin/sh
#
# FILE: update_dynamic_ip_route53.sh
# AUTHOR: Miguel Salvá
# ABSTRACT: This script request the current external IP address to the ipify API and updates it on the AWS Route53 service
#
# This script requires the AWS CLI installed/configured and the $DOMAIN and $HOSTED_ZONE variables defined to run 


DOMAIN=""  # AWS domain to be updated
HOSTED_ZONE_ID=""  # AWS hosted zone ID of the domain to be updated

JSON_FILE="$HOME/update_route53.json"
IP=$(curl -s https://api.ipify.org)


echo "The public IP address is: $IP"

echo "{" > $JSON_FILE
echo "	"\""Comment"\"": "\""UPSERT a record "\""," >> $JSON_FILE
echo "	"\""Changes"\"": [{" >> $JSON_FILE
echo "		"\""Action"\"": "\""UPSERT"\""," >> $JSON_FILE
echo "		"\""ResourceRecordSet"\"": {" >> $JSON_FILE
echo "			"\""Name"\"": "\""$DOMAIN"\""," >> $JSON_FILE
echo "			"\""Type"\"": "\""A"\""," >> $JSON_FILE
echo "			"\""TTL"\"": 300," >> $JSON_FILE
echo "			"\""ResourceRecords"\"": [{ "\""Value"\"": "\""$IP"\""}]" >> $JSON_FILE
echo "	}}]" >> $JSON_FILE
echo "}" >> $JSON_FILE

aws route53 change-resource-record-sets --hosted-zone-id $HOSTED_ZONE_ID --change-batch file://$JSON_FILE
echo "The domain $DOMAIN has been successfully updated"