medium10 pts · first answer countsprometheustls

Catching certificate expiry

Last year a TLS certificate expired and caused an outage. How can you alert on this ahead of time with Prometheus?

A.Probe the endpoint with the blackbox exporter and alert when probe_ssl_earliest_cert_expiry - time() is less than about 14 daysB.Alert when http_requests_total drops to zeroC.Grep the application logs for "certificate" once a monthD.Set the certificate validity to 100 years

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Catching certificate expiry

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