fabric-samples/test-network/organizations/cfssl/peer-csr-template.json

{
    "CN": "{USER}",
    "key": {
        "algo": "ecdsa",
        "size": 256
    },
    "names": [
        {
            "C": "IN",
            "ST": "Delhi",
            "L": "Aero city",
            "O": "cfssl",
            "OU": "peer"
        }
    ],
    "hosts": [
        "{USER}",
        "localhost",
        "127.0.0.1",
        "0.0.0.0"
    ]
}