Detected cluster health issues in your AWS account 808842816990

[dims]

We got an automated message from Amazon EKS folks

The following is a list of affected clusters with their cluster arns, cluster health status and corresponding cluster health issues(s):
arn:aws:eks:us-east-2:808842816990:cluster/k8s-infra-kops-prow-build : IMPAIRED : Not Enough Free IP Addresses In Subnet.

The health of an EKS cluster is a shared responsibility between AWS and customers. You must resolve these issues to maintain operational stability for your EKS cluster(s). Cluster health issues can prevent Amazon EKS from patching your clusters or prevent you from upgrading to newer Kubernetes versions.

Starting on 2024-04-15, Amazon EKS will patch clusters to the latest supported platform version [1]. Clusters that are unstable due to outstanding health issues may experience loss in connectivity between the Kubernetes control plane instances and worker nodes where your workload runs. To avoid this, we recommend that you resolve outstanding cluster health issues [2] before this date.

You can also view your affected clusters in the 'Affected resources' tab in your AWS Health Dashboard or by using the DescribeCluster API [3].

[1] https://docs.aws.amazon.com/eks/latest/userguide/platform-versions.html
[2] https://docs.aws.amazon.com/eks/latest/userguide/troubleshooting.html#cluster-health-status
[3] https://docs.aws.amazon.com/eks/latest/APIReference/API_DescribeCluster.html

[dims]

cc @xmudrii

[ameukam]

Working on this currently. I'll take a look next week.
/assign @ameukam

[ameukam]

/sig k8s-infra
/kind bug
/area infra/aws
/milestone v1.30

[ameukam]

we also get alerts from e2e-shared account. Looks like it's not specific to an EKS cluster