machine_setup/nix/kubernetes/keys/package/k8s-controller-proxy/files/controller1-proxy-csr.json

{
  "CN": "system:node:controller1",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "US",
      "L": "Portland",
      "O": "system:nodes",
      "OU": "Kubernetes The Hard Way",
      "ST": "Oregon"
    }
  ]
}