Graduate AdditionalCertificateOutputFormats feature gate

[erikgb]

Is your feature request related to a problem? Please describe.

The feature gate AdditionalCertificateOutputFormats was introduced in cert-manager 1.7.0 and we have been using it since then without any issues. I also have a feeling it unlocks a feature needed by multiple cert-manager users. We are heavy users of Kafka, and to avoid the pesky keystores/truststores we need this feature to provide an alternative PEM "keystone" format accepted by Kafka.

We try to avoid enabling feature gates, especially features marked as alpha features. But in this case we had no choice.

Describe the solution you'd like

I would like to see this feature gate graduated, ref. https://cert-manager.io/docs/installation/featureflags/#graduation. First to Beta and enabled by default and eventually removed.

Describe alternatives you've considered

Additional context

Environment details (remove if not applicable):

• Kubernetes version:
• Cloud-provider/provisioner:
• cert-manager version:
• Install method: e.g. helm/static manifests

/kind feature

[inteon]

Feel free to create a PR to promote this feature to beta. See #6298 as example.

[jetstack-bot]

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[erikgb]

/remove-lifecycle stale

I am (still) planning to do this. 😅

[jetstack-bot]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.
If this issue is safe to close now please do so with /close.
/lifecycle stale

[inteon]

/remove-lifecycle stale