[Bug] cluster-dns-ip not supported for bottlerocket settings

[kramuenke-catch]

Hi all,

we are trying to use cluster-dns-ip setting for a bottlerocket nodegroup. When using

  bottlerocket:
    settings:
      kubernetes:
        cluster-dns-ip: ["169.254.20.10","172.20.0.10"]

we get the following error:

Error:
 could not create cluster provider from options: invalid Bottlerocket 
setting: use nodeGroups[0].clusterDNS instead 
(path=nodeGroups[0].kubernetes.cluster-dns-ip)

Since we aim to use both node-local-dns ip and cluster ip we can not use nodeGroups[0].clusterDNS as an alternative.

[github-actions]

Hello kramuenke-catch 👋 Thank you for opening an issue in eksctl project. The team will review the issue and aim to respond within 1-5 business days. Meanwhile, please read about the Contribution and Code of Conduct guidelines here. You can find out more information about eksctl on our website

[kramuenke-catch]

e.g. is it possible to revisit treating this as an overlap error since cluster-dns-ip supports a single IP and a list of IPs and clusterDNS only supports a single IP.

[cPu1]

@kramuenke-catch this is a valid issue. Since kubernetes.cluster-dns-ip allows specifying a set of nameserver IPs, and nodeGroup.clusterDNS does not, eksctl should allow setting kubernetes.cluster-dns-ip if clusterDNS is not specified. We'll work on a fix soon.