Network service management device, network service management method, and network service management program

A network service management method of a network service management apparatus that uses resources included in a network functions virtualization infrastructure to provide a network service, the network service management method comprising:

• by the network service management apparatus, defining resources that satisfy a resource requirement of a virtual network function constituting the network service and are allocated to the virtual network function, and making a first reservation of the resources that are defined;
• by the network service management apparatus, securing first resources including the resources reserved by the first reservation, activating the virtual network function on the first resources that are secured, and generating the network service;
• by the network service management apparatus, when there are resources that are failed to be secured among the resources reserved by the first reservation,
• defining, for a virtual network function to which the resources that are failed to be secured are allocated, a new instance of resources that satisfy a resource requirement of the virtual network function to which the resources that are failed to be secured are allocated and are allocated to the virtual network function to which the resources that are failed to be secured are allocated;
• and
• making a second reservation of the new instance of the resources;
• and
• by the network service management apparatus, securing second resources including the resources reserved by the first reservation other than the resources that are failed to be secured and the resources reserved by the second reservation, activating a virtual network function on the second resources that are secured, and generating the network service.

A network service management program causing a computer to execute methods comprising:

• defining resources that satisfy a resource requirement of a virtual network function constituting the network service and are allocated to the virtual network function, and making a first reservation of the resources that are defined;
• securing first resources including the resources reserved by the first reservation, activating the virtual network function on the first resources that are secured, and generating the network service;
• when there are resources that are failed to be secured among the resources reserved by the first reservation,
• defining, for a virtual network function to which the resources that are failed to be secured are allocated, a new instance of resources that satisfy a resource requirement of the virtual network function to which the resources that are failed to be secured are allocated and are allocated to the virtual network function to which the resources that are failed to be secured are allocated;
• and
• making a second reservation of the new instance of the resources;
• and
• securing second resources including the resources reserved by the first reservation other than the resources that are failed to be secured and the resources reserved by the second reservation, activating a virtual network function on the second resources that are secured, and generating the network service.