How to Create Dynamic DNS in AWS Route 53 Using Python and the AWS SDK

sudo apt update

mkdir ddns && cd ddns

nano ddns.py

sudo apt install python3-boto3
sudo apt install python3-requests

sudo chmod +x ddns.py

python3 ddns.py

sudo nano /etc/systemd/system/update-dns.service

[Unit]
Description=Update Route 53 DNS with Public IP
After=network.target

[Service]
ExecStart=/usr/bin/python3 /home/ubuntu/ddns/ddns.py
WorkingDirectory=/home/ubuntu/
StandardOutput=inherit
StandardError=inherit
Restart=always
User=ubuntu

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload
sudo systemctl enable update-dns.service
sudo systemctl start update-dns.service

crontab -e

*/5 * * * * /usr/bin/python3 /home/ubuntu/ddns/update_dns.py

sudo systemctl enable cron
sudo systemctl start cron

sudo systemctl status cron