This setup lets you run your Ansible playbook automatically (for example, via a daily cron job) and receive notifications from your ntfy.sh server about the status.

To do this, the we can use the callback plugin Ansible feature.

You can run the playbook and set the required environment variables however you like.
I chose to do it in a bash script ansible-playbook.sh, and run that script in my cron job.

This will configure an Asustor NAS to use a Let's Encrypt certificate without exposing it to the internet.
To achieve this, we use Certbot with the DNS-01 challenge via Cloudflare.

I'm placing my configuration in /volume1/system. Feel free to change this to whatever location you prefer.

1. Set up Cloudflare credentials.

mkdir /volume1/system/letsencrypt

The goal is to configure Synology NAS to use letsencrypt certificate without exposing it to the internet.
To achieve this we use certbot with DNS-01 challenge to Cloudflare.

1. Run install.sh to install pip and certbot. You may need to run this again after DSM upgrades.

2. Setup cloudflare secret.