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update metrics catalog: add nginx.ssl.certificate.expiry.time metric #2276

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vivki merged 1 commit into from
Sep 10, 2026
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update metrics catalog: add nginx.ssl.certificate.expiry.time metric #2276

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3 changes: 3 additions & 0 deletions content/includes/nginxaas/metrics-catalog.md
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Expand Up @@ -95,9 +95,12 @@ server {
| ------ | ------ | ---- | ----------- | ------------|
| nginx.ssl.handshakes | nginxaas_organization_object_id, nginxaas_namespace, nginxaas_deployment_object_id, nginxaas_deployment_name, nginxaas_deployment_location, nginx_ssl_status, nginx_ssl_handshake_reason | count | The total number of SSL handshakes (successful and failed). | deployment |
| nginx.ssl.certificate.verify_failures | nginxaas_organization_object_id, nginxaas_namespace, nginxaas_deployment_object_id, nginxaas_deployment_name, nginxaas_deployment_location, nginx_ssl_verify_failure_reason | count | The total number of SSL certificate verification failures, categorized by reason. | deployment |
| nginx.ssl.certificate.expiry.time | nginxaas_organization_object_id, nginxaas_namespace, nginxaas_deployment_object_id, nginxaas_deployment_name, nginxaas_deployment_location, file_path, public_key_algorithm, serial_number, subject_common_name | gauge | The Unix timestamp, in seconds, at which an SSL/TLS certificate expires. | deployment |

{{< /table >}}

{{< call-out class="note" >}} The `nginx.ssl.certificate.expiry.time` metric reports the expiry time of the certificate as an absolute Unix timestamp. To chart or alert on the time remaining, subtract the current time. For example, in PromQL: `nginx.ssl.certificate.expiry.time - time()`. {{< /call-out >}}

### NGINX cache statistics

To collect cache metrics, configure caching in your NGINX configuration using the `proxy_cache_path` and `proxy_cache` directives.
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