vendor/github.com/coreos/etcd/hack/tls-setup/config/req-csr.json

{
  "CN": "etcd",
  "hosts": [
    "localhost"
  ],
  "key": {
    "algo": "ecdsa",
    "size": 384
  },
  "names": [
    {
      "O": "autogenerated",
      "OU": "etcd cluster",
      "L": "the internet"
    }
  ]
}