Start initialises the Prometheus endpoint if metrics have been configured.

ActionAttemptedCount counts actions taken by a spec.

ActionFailedCount counts failed actions taken by a spec.

ManagerInterval is set to the interval at which a cert manager wakes up and does its checks.

SpecCheckCount counts the number of PKI regeneration taken by a spec.

SpecExpires contains the time of the next certificate expiry.

SpecExpiresBeforeThreshold exports how much lead time we give for trying to renew a cert before it expires.

SpecLoadCount counts the number of times a spec was loaded from disk.

SpecLoadFailureCount counts the number of times a spec couldn't be loaded from disk.

SpecRefreshCount counts the number of PKI regeneration taken by a spec.

SpecRequestFailureCount counts the number of times a spec failed to request a certificate from upstream.

SpecWatchCount counts the number of specs being watched.

SpecWriteCount contains the number of times the PKI on disk was written.

SpecWriteFailureCount contains the number of times the PKI on disk failed to be written.