⚠️ Action Required: Replace Deprecated gcr.io/kubebuilder/kube-rbac-proxy

[camilamacedo86]

Description

⚠️ The image gcr.io/kubebuilder/kube-rbac-proxy is deprecated and will become unavailable.
You must move as soon as possible, sometime from early 2025, the GCR will go away.

Unfortunately, we're unable to provide any guarantees regarding timelines or potential extensions at this time. Images provided under GRC will be unavailable from March 18, 2025, as per announcement. However, gcr.io/kubebuilder/may be unavailable before this date due to efforts to deprecate infrastructure.

• If your project uses gcr.io/kubebuilder/kube-rbac-proxy, it will be affected.
  Your project may fail to work if the image cannot be pulled. You must take action as soon as possible.

• However, if your project is no longer using this image, no action is required, and you can close this issue.

Using the image gcr.io/kubebuilder/kube-rbac-proxy?

kube-rbac-proxy was historically used to protect the metrics endpoint. However, its usage has been discontinued in Kubebuilder. The default scaffold now leverages the WithAuthenticationAndAuthorization feature provided by Controller-Runtime.

This feature provides integrated support for securing metrics endpoints by embedding authentication (authn) and authorization (authz) mechanisms directly into the controller manager's metrics server, replacing the need for (https://github.com/brancz/kube-rbac-proxy) to secure metrics endpoints.

What To Do?

You must replace the deprecated image gcr.io/kubebuilder/kube-rbac-proxy with an alternative approach. For example:

• Update your project to use WithAuthenticationAndAuthorization:

  You can fully upgrade your project to use the latest scaffolds provided by the tool or manually make the necessary changes. Refer to the FAQ and Discussion for detailed instructions on how to manually update your project and test the changes.

• Alternatively, replace the image with another trusted source at your own risk, as its usage has been discontinued in Kubebuilder.

For further information, suggestions, and guidance:

• 📖 FAQ and Discussion
• 💬 Join the Slack channel: #kubebuilder.

NOTE: This issue was opened automatically as part of our efforts to identify projects that might be affected and to raise awareness about this change within the community. If your project is no longer using this image, feel free to close this issue.

We sincerely apologize for any inconvenience this may cause.

Thank you for your cooperation and understanding! 🙏

[MStokluska]

Thank you, we are not using it https://github.com/3scale/apicast-operator/blob/master/config/default/kustomization.yaml#L31

[camilamacedo86]

Hi @MStokluska,

How do you protect your metrics endpoint? Unprotected metrics endpoints can expose sensitive data, such as system performance and application behavior, leading to potential security vulnerabilities.

I strongly recommend ensuring that you protect it accordingly.

Please review the following discussion for more details: GitHub Discussion - kubebuilder #3907.

Additionally, I suggest waiting for the upcoming release, 4.4.0, which will include support for Kubernetes 1.32. If feasible, consider fully upgrading your project using the latest scaffold provided in the new release. This upgrade will ensure a default implementation (similar to kube-rbac-proxy) with options to improve production readiness, such as securely configuring certificates. You can find more details on this feature in the discussion linked above.

Upgrading also allows you to leverage other improvements, bug fixes, and the latest updates. Ensure your project layout addresses all breaking changes introduced by controller-runtime v0.20.0 that affect webhooks.

Note that for the next release, you will either have an option just to enable the certs provided by certmanager to be used within, see the PR: kubernetes-sigs/kubebuilder#4400

Let me know if you have any questions!

Best regards,