Use certbot ntfy topic for certificate alerts

README.md

@@ -2,60 +2,15 @@
 
 Server-wide maintenance scripts and operational notes for the Silver Cloud Hetzner host.
 
-Suggested repository name:
+This repo is for host-level improvements that are not tied to one specific app or
+service. SSL expiry alerts are the first check in the repo; more server-wide
+maintenance checks can be added here over time.
 
-```text
+## Implemented Checks
-silver-server-ops
+
-```
+- SSL certificate expiry alerts
 
 ## SSL Certificate Expiry Alerts
 
-`scripts/check-cert-expiry.sh` checks every Let's Encrypt certificate under `/etc/letsencrypt/live` and sends an ntfy alert when any certificate expires in less than 14 days.
+`scripts/check-cert-expiry.sh` checks Let's Encrypt certificates and alerts when
-
+any certificate expires in less than 14 days.
-Install on the server:
-
-```bash
-sudo install -m 0755 scripts/check-cert-expiry.sh /opt/scripts/check-cert-expiry.sh
-```
-
-Recommended root cron:
-
-```cron
-15 8 * * * /opt/scripts/check-cert-expiry.sh >/var/log/cert-expiry-check.log 2>&1
-```
-
-Defaults:
-
-```bash
-CERT_DIR=/etc/letsencrypt/live
-EXPIRY_DAYS=14
-NTFY_URL=https://ntfy.silverwal.com/silver
-```
-
-Optional overrides:
-
-```bash
-EXPIRY_DAYS=21 NTFY_URL=https://ntfy.silverwal.com/silver /opt/scripts/check-cert-expiry.sh
-```
-
-If your ntfy topic is protected with an access token:
-
-```bash
-NTFY_TOKEN=your-token /opt/scripts/check-cert-expiry.sh
-```
-
-Manual test:
-
-```bash
-sudo /opt/scripts/check-cert-expiry.sh
-```
-
-The script exits with `0` when all certificates are healthy and `1` when it sends an alert or cannot run the check correctly.
-
-## Notification Notes
-
-ntfy is a good default for this server because it is already self-hosted, simple to call from shell scripts, and supports useful alert metadata such as title, priority, and tags.
-
-For jobs where silence is also a failure, pair ntfy with a dead man's switch such as Healthchecks. ntfy tells you what the script found; Healthchecks tells you when the script did not run at all.
-
-If you later want one notification config that can fan out to ntfy, email, Slack, Discord, Telegram, and similar services, use Apprise as the wrapper and keep ntfy as one destination.

scripts/check-cert-expiry.sh

@@ -4,7 +4,7 @@ set -uo pipefail
 
 CERT_DIR="${CERT_DIR:-/etc/letsencrypt/live}"
 EXPIRY_DAYS="${EXPIRY_DAYS:-14}"
-NTFY_URL="${NTFY_URL:-https://ntfy.silverwal.com/silver}"
+NTFY_URL="${NTFY_URL:-https://ntfy.silverwal.com/certbot}"
 NTFY_TITLE="${NTFY_TITLE:-SSL certificate warning}"
 NTFY_PRIORITY="${NTFY_PRIORITY:-high}"
 NTFY_TAGS="${NTFY_TAGS:-warning,lock}"