keystone/api-ref/source/v3/samples/admin/domain-config-default-response.json

{
    "config": {
        "identity": {
            "driver": "ldap"
        },
        "ldap": {
            "url": "ldap://localhost",
            "user": "",
            "suffix": "cn=example,cn=com",
            ....
        }
    }
}