[Feature]: Expose private ip addresses of LKE control plane

[fegger-ducksify]

Description

I would like isolate LKE cluster from other datacenter instances in private network 192.168.128.0/17 with firewalling. So I created the following ressources where local.private_ips is the private ip of my worker nodes

resource "linode_firewall" "firewall" {
  label = "lke"

  inbound {
    label    = "Kubelet"
    action = "ACCEPT"
    protocol  = "TCP"
    ports     = "10250"
    ipv4 = local.private_ips
  }
  inbound {
    label    = "Wireguard"
    action = "ACCEPT"
    protocol  = "UDP"
    ports     = "51820"
    ipv4 = local.private_ips
  }

  inbound {
    label    = "Calico"
    action = "ACCEPT"
    protocol  = "TCP"
    ports     = "179"
    ipv4 = local.private_ips
  }

  inbound {
    label    = "Nodeports"
    action = "ACCEPT"
    protocol  = "TCP"
    ports     = "32136"
    ipv4 = ["0.0.0.0/0"]
  }
inbound {
    label    = "ClusterIP_PodsIP"
    action = "ACCEPT"
    protocol  = "TCP"
    ports     = "1-65535"
    ipv4 = ["10.128.0.0/16", "10.2.0.0/16"]
  }

The problem is control plane needs to communicate with nodes on port 10250 (kubectl exec for example) And actually I don't have the possibility to get private IPs addresses of control plane.

A netstat on nodes show me

 length 135
09:42:40.999909 IP 192.168.178.23.28658 > 192.168.143.54.10250: Flags [R], seq 536968721, win 0, length 0
09:42:40.999965 IP 192.168.178.23.28658 > 192.168.143.54.10250: Flags [R], seq 536968721, win 0, length 0

So I would like retrieve these two IP addresses via ressource linode_lke_cluster to integrate them in a fw rule.

Is that make sense?

New or Affected Terraform Resources

linode_lke_cluster

Potential Terraform Configuration

No response