Add external kubeadm node to Talos cluster

node-bootstrup.sh

VIP="192.168.100.5"

mkdir -p /etc/kubernetes/pki
talosctl -n "$VIP" cat /etc/kubernetes/kubeconfig-kubelet > /etc/kubernetes/kubelet.conf
talosctl -n "$VIP" cat /etc/kubernetes/bootstrap-kubeconfig > /etc/kubernetes/bootstrap-kubelet.conf
talosctl -n "$VIP" cat /etc/kubernetes/pki/ca.crt > /etc/kubernetes/pki/ca.crt

sed -i "/server:/ s|:.*|: https://${VIP}:6443|g" \
  /etc/kubernetes/kubelet.conf \
  /etc/kubernetes/bootstrap-kubelet.conf


clusterDomain=$(talosctl -n "$VIP" get kubeletconfig -o jsonpath="{.spec.clusterDomain}")
clusterDNS=$(talosctl -n "$VIP" get kubeletconfig -o jsonpath="{.spec.clusterDNS}")
cat > /var/lib/kubelet/config.yaml <<EOT
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
authentication:
  anonymous:
    enabled: false
  webhook:
    enabled: true
  x509:
    clientCAFile: /etc/kubernetes/pki/ca.crt
authorization:
  mode: Webhook
clusterDomain: "$clusterDomain"
clusterDNS: $clusterDNS
runtimeRequestTimeout: "0s"
cgroupDriver: systemd
EOT