Add metrics for certificate expiration date #131
Merged
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What this PR does / why we need it:
A new metrics named
cert_management_cert_object_expire
has been added. It provides the expiration date as Unix time (the number of seconds elapsed since January 1, 1970 UTC) for eachCertificate
object.If the metrics is collected by Prometheus, the remaining days before expiration can be calculated with PromQL expression
Which issue(s) this PR fixes:
Fixes #130
Special notes for your reviewer:
Release note: