Multiple privateAddress (node InternalIP)

[Sensei-CHO]

I'm trying to deploy a k0s cluster using k0sctl with dualStack ipv4/ipv6. My goal is to use cilium and make use of nodes InternalIPs.

k0sctl.yaml:

apiVersion: k0sctl.k0sproject.io/v1beta1
kind: Cluster
metadata:
  name: magi
spec:
  hosts:
  - role: controller+worker
    privateInterface: eth0
    ssh:
      address: 192.168.1.50
      user: root
      keyPath: ~/.ssh/id_rsa
    noTaints: true
  - role: worker
    privateInterface: eth0
    ssh:
      address: 192.168.1.60
      user: root
      keyPath: ~/.ssh/id_rsa
  - role: worker
    privateInterface: eth0
    ssh:
      address: 192.168.1.70
      user: root
      keyPath: ~/.ssh/id_rsa
  k0s:
    version: v1.27.1+k0s.0
    config:
      apiVersion: k0s.k0sproject.io/v1beta1
      kind: ClusterConfig
      metadata:
        name: magi
      spec:
        network:
          podCIDR: "10.244.0.0/16"
          serviceCIDR: "10.96.0.0/12"
          provider: custom
          dualStack:
            enabled: true
            IPv6podCIDR: "fd00::/108"
            IPv6serviceCIDR: "fd01::/108"

Each node have an IPv4 and and IPv6 address, the problem is that when I deploy my cluster, my nodes only have the IPv4 InternalIP.

Is there any way to set multiples InternalIP on cluster deployment?

UPDATE: I achieve to get this working by modifying manually the k0scontroller.service:

ExecStart=/usr/local/bin/k0s controller --config=/etc/k0s/k0s.yaml --enable-worker=true --no-taints=true --kubelet-extra-args=--node-ip=192.168.1.x,2a12:xxxx:xxxx:xxxx::x

The --node-ip kubelet argument can take multiple IP addresses separated with commas, but k0sctl cannot:

spec:
  hosts:
  - role: controller+worker
    privateAddress: 192.168.1.50,2a12:xxxx:xxxx:xxxx::x

FATA configuration validation failed: spec: (hosts: host #1: privateAddress: must be a valid IP address..).

[kke]

Requires some changes, but it's doable.

[jnummelin]

This needs a bit more thought I think. currently (as fas as I remember) this k0sctl field also maps to some k0s.yaml fields. Like for example the etcd peering address. So if we have multiple addresses, which one should be used for etcd?