Embodiments of the invention provide a method and apparatus for resource provisioning for a new virtual machine to be provided in a computer device. In one embodiment, at least one storage subsystem, the computer device, and a storage management server are connected via a network. A unique virtual port name for the new virtual machine is created by one of a first storage subsystem of the at least one storage subsystem or the storage management server. A volume for the new virtual machine is provided in the first storage subsystem. The first storage subsystem includes a unique port name for a port through which the volume for the new virtual machine has I/O connection via the network. The unique virtual port name is assigned to the new virtual machine in the computer device under NPIV (N_Port ID Virtualization).