This issue is to track the refactoring the certificate management code bits in follow-up PRs:

• Return and handle error for ValidityDuration check.
  refs: https://github.com/etcd-io/etcd-operator/blob/main/internal/controller/utils.go#L572-L574
  https://github.com/etcd-io/etcd-operator/blob/main/internal/controller/utils.go#L605-L607
  Add AutoProvider certificate manager  #227 (comment)
  Fix PR: Handle invalid ValidityDuration user input #253

• Refactor Auto Cert Provider struct to include userAutoConfig
  refs: https://github.com/etcd-io/etcd-operator/blob/main/pkg/certificate/auto/provider.go#L34-L46
  Add AutoProvider certificate manager  #227 (comment)
  Fix PR: Include userAutoConfig in Auto Provider struct #255

• Add parseCert.NotBefore check for the CertManager and Auto provider validity.
  refs: https://github.com/etcd-io/etcd-operator/blob/main/pkg/certificate/cert_manager/provider.go#L145-L147
  https://github.com/etcd-io/etcd-operator/blob/main/pkg/certificate/auto/provider.go#L122-L124
  Add AutoProvider certificate manager  #227 (comment)
  Fix PR: Add parseCert.NotBefore check for certificate validation #254

• Refactor interfaces definition and its usages to pass ctrlruntimeclient.ObjectKey instead of secretName , namespace combination. Refs: Add AutoProvider certificate manager  #227 (comment)
  Fix PR: Refactor interfaces definition to use ctrlruntimeclient.ObjectKey  #252

  • EnsureCertificateSecret: https://github.com/etcd-io/etcd-operator/blob/main/pkg/certificate/interfaces/interface.go#L79
  • ValidateCertificateSecret: https://github.com/etcd-io/etcd-operator/blob/main/pkg/certificate/interfaces/interface.go#L94C2-L94C27
  • DeleteCertificateSecret: https://github.com/etcd-io/etcd-operator/blob/main/pkg/certificate/interfaces/interface.go#L107C2-L107C25
  • RevokeCertificate: https://github.com/etcd-io/etcd-operator/blob/main/pkg/certificate/interfaces/interface.go#L118C2-L118C19
  • GetCertificateConfig: https://github.com/etcd-io/etcd-operator/blob/main/pkg/certificate/interfaces/interface.go#L128C2-L128C22