Dear ___

Based on our API monitoring, you are using Kubernetes cluster-autoscaler in your Hetzner Cloud projects. The Hetzner provider in current versions of cluster-autoscaler has a bug and relies on the CX11 server type, which we scheduled for removal from our ordering options on 6 September 2024. To prevent any disruptions for you, we kept the CX11 server type available for your account.

The Kubernetes community has now released new versions of cluster-autoscaler that fix this bug. Please upgrade to the these versions before 4 November 2024.

The following versions include the patches:

    ≥ 1.28.7
    ≥ 1.29.5
    ≥ 1.30.2
    ≥ 1.31.1

We will remove your access to the CX11 server type after 4 November 2024. If you are still using unpatched versions of cluster-autoscaler, they will stop working.

If you were using the alternative container images we provided ([docker.io/hetznercloud/cluster-autoscaler](http://docker.io/hetznercloud/cluster-autoscaler)), please switch back to the images built by the Kubernetes community ([registry.k8s.io/autoscaling/cluster-autoscaler](http://registry.k8s.io/autoscaling/cluster-autoscaler)). We will remove the alternative container images on 19 November 2024.

You can find more information at the following links:

    https://docs.hetzner.cloud/changelog#2024-08-30-bug-cx11-removal-will-break-certain-versions-of-cluster-autoscaler
    https://github.com/kubernetes/autoscaler/issues/7210
    https://docs.hetzner.cloud/changelog#2024-06-06-old-server-types-with-shared-intel-vcpus-are-deprecated

We will be happy to help you with any questions. Please write us a support request by logging onto your account: https://console.hetzner.cloud/support

Thank you for your understanding.

Kind regards

Hetzner Online