During FusionAccess virtual desktop provisioning, when a VM is being created, which of the following components checks whether the specified VM group and desktop group exist?

The Huawei Desktop Controller (HDC) is the core management component of the FusionAccess solution. It is responsible for the entire lifecycle management of virtual desktops, including user access control, desktop group management, and provisioning policies. When a request to create a VM is initiated, the HDC orchestrates the process. As part of its validation checks before instructing the virtualization platform (FusionCompute) to create the VM, the HDC verifies that the specified logical entities, such as the VM group and desktop group, exist in its configuration database (GaussDB).

B. GaussDB is the database that stores configuration data; it does not perform the logical checks. The HDC queries the database to perform the check.
C. The HDA (Huawei Desktop Agent) is software installed inside the guest OS of the VM and is not involved in the VM creation and validation process.
D. HDP (Huawei Desktop Protocol) is the remote display protocol used for user sessions and is unrelated to the backend provisioning workflow.

- Huawei FusionAccess Desktop Solution Product Documentation, "Technical White Paper", Section: "Architecture", Subsection: "Management Components". This document describes the HDC as the core management and control component responsible for resource management and scheduling.

- Huawei HCIA-Cloud Computing V4.0 Training Material, Chapter: "Huawei Desktop Cloud Solution Introduction", Section: "FusionAccess Components". The material explicitly defines the HDC's role in managing desktop groups and executing provisioning tasks.