USE CASE · Web operations / platform reliability
SSL certificate monitoring
Catch an expiring certificate, an invalid chain or a hostname mismatch before browsers turn it into a customer-facing outage.
What good looks like
Certificate expiry is a scheduled maintenance task, not an incident. The team has enough warning to rotate the certificate, verify the chain and confirm the public path before customers see a browser warning.
What goes wrong without one
The application is healthy but every browser refuses the connection. The dashboard says green because it only checked a TCP port, while customers see an unsafe-site interstitial.
What this workload actually needs
An HTTPS monitor for the real public URL with SSL monitoring enabled, plus a separate DNS record check when certificate renewal depends on DNS validation or a CDN-managed hostname.
Rollout checklist
- 01Monitor the customer-facing hostname, not only the origin that sits behind a CDN or load balancer.
- 02Set an expiry threshold that gives the certificate owner time to rotate across every environment.
- 03Include certificate failures in the same alert route as endpoint downtime; both block customers from using the service.
- 04Document the certificate owner and renewal path in the incident runbook before the alert is needed.
Set up a ssl certificate monitoring status page in two minutes.
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