rally-openstack/samples/tasks/scenarios/keystone/create-and-get-role.json

{
    "KeystoneBasic.create_and_get_role": [
    {
           "args": {},
           "runner": {
                "type": "constant",
                "times": 10,
                "concurrency": 2
            },
            "context": {
                "users": {
                    "tenants": 3,
                    "users_per_tenant": 2
                }
            },
            "sla": {
                "failure_rate": {
                    "max": 0
                }
            }
        }
    ]
}