This question pertains to OpenStack, a common virtualization platform in Huawei’s HCIP-Data Center

Network curriculum, where components collaborate to create and manage virtual machines (VMs).

Let’s analyze each component’s role in providing computing, storage, and network resources during

VM creation:

A. Nova: Nova is the compute service in OpenStack, responsible for managing VM lifecycles,

including provisioning CPU and memory resources. It’s essential for providing computing resources

during VM creation. Required.

B. Neutron: Neutron is the networking service, handling virtual network creation, IP allocation, and

connectivity (e.g., VXLAN or VLAN) for VMs. It’s critical for providing network resources during VM

creation. Required.

C. Ceilometer: Ceilometer is the telemetry service, used for monitoring, metering, and collecting

usage data (e.g., CPU utilization, disk I/O) of VMs. While useful for billing or optimization, it does not

directly provide computing, storage, or network resources during VM creation. Not Required.

D. Cinder: Cinder is the block storage service, providing persistent storage volumes for VMs (e.g., for

OS disks or data). It’s essential for providing storage resources during VM creation if a volume is

attached. Required.

Thus, C (Ceilometer) is not required to provision the core resources (computing, storage, network)

for VM creation, as its role is monitoring, not resource allocation.

Reference: Huawei HCIP-Data Center Network Training – OpenStack Architecture; OpenStack Official

Documentation – Service Overview.