How to expose kind cluster over external IP

This requires kind to be installed in the machine. If it is not installed, please follow this tutorial.

Following configuration allows you to expose kind cluster over an external IP.

kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
networking:
  ipFamily: ipv6
  apiServerAddress: 0.0.0.0
  apiServerPort: 6443
nodes:
- role: control-plane
  kubeadmConfigPatches:
  - |
    kind: InitConfiguration
    nodeRegistration:
      kubeletExtraArgs:
        node-labels: "ingress-ready=true"
        authorization-mode: "AlwaysAllow"
  kubeadmConfigPatchesJSON6902:
  - group: kubeadm.k8s.io
    version: v1beta3
    kind: ClusterConfiguration
    patch: |
      - op: add
        path: /apiServer/certSANs/-
        value: <external-ip>

This configuration binds the port of kind cluster's API server to port 0.0.0.0:6443 and the certSans adds the external IP to the list of CNs.