kubeasz/roles/kube-node/templates/kubelet-csr.json.j2

{
  "CN": "system:node:{{ inventory_hostname }}",
  "hosts": [
{% for host in groups['kube-node'] %}
    "{{ host }}",
{% endfor %}
    "127.0.0.1"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "HangZhou",
      "L": "XS",
      "O": "system:nodes",
      "OU": "System"
    }
  ]
}