In Huawei Cloud Stack, the information source for which of the following operations does not involve resource management (CMDB)?

After OpenStack introduced P1acement, the scheduling process in Nova evolved to require a pre- screening through P1acement, that is, nova-scheduler sends a request to Placement to obtain the Resource Provider that meets the initial resource requirements and the corresponding resource allocation.

In Huawei Cloud Stack, the basic information, component list, topology view, and current alarms of computing & storage & physical network monitoring are obtained from resource management (CMDB), while the monitored performance indicators are obtained from ().

Nova not only provides life cycle management of computing resources (including bare metal, virtual machines and containers), but is also responsible for the management of the physical hosts hosting virtual machines themselves.

In OpenStack, if an administrator wants to create a resource, which of the following services must be involved?