Comment 9 for bug 1950406

I think you are indenting the `conf` parameter wrong in your file.

`conf: null`

The `nova` and `overrides` are inside `conf`:

conf:
  nova:
    PCI:
      alias:
        type: multistring
        values:
        - '{"vendor_id": "8086", "product_id": "1533","device_type":"type-PCI","name": "h210-1"}'
      passthrough_whitelist:
        type: multistring
        values:
        - '{"class_id": "8086", "product_id":"1533"}'
  overrides:
    nova_compute:
      hosts:
      - conf:
          nova:
            DEFAULT:
              my_ip: 192.168.206.2
              shared_pcpu_map: '""'
              vcpu_pin_set: '"2-5"'
            libvirt:
              images_type: default
              live_migration_inbound_addr: 192.168.206.2
            PCI:
              passthrough_whitelist:
                type: multistring
                values:
                - '{"class_id": "8086", "product_id": "1533"}'
            vnc:
              vncserver_listen: 0.0.0.0
              vncserver_proxyclient_address: 192.168.206.2
        name: controller-0