Focus on VDU

VDU is a special resource that represents an infrastructure-level unit of execution environment, carrying the following functions:

ability to host a piece of application-level logic (VNFC)
specifies an image to launch from
concentrates the requirements for infrastructure resources: CPU, memory, IO, storage, networking

ONAP Data Model Normatives

node_types:
  # the very base of the hierarchy of VDU types
  onap.nodes.VDU:
    derived_from: onap.nodes.Resource
    artifacts:
      vdu_image:
        type: tosca.artifacts.Deployment
        description: an image used to launch the VDU
    interfaces:
      Standard:
        start: 
          implementation: vdu_image
    capabilities:
      host:
        type: tosca.capabilities.Container  # the TOSCA Specs type is good enough
        occurrences: [0..UNBOUNDED]
    requirements:
      - cpu:
          capability: onap.capabilities.infrastructure.CPU:
          occurrences: [0..UNBOUNDED]
      - memory:
          capability: onap.capabilities.infrastructure.Memory:
          occurrences: [0..UNBOUNDED]
      - storage:
          capability: onap.capabilities.infrastructure.Storage:
          occurrences: [0..UNBOUNDED]
      - io:
          capability: onap.capabilities.infrastructure.IO:
          occurrences: [0..UNBOUNDED]
      - nic:
          capability: onap.capabilities.infrastructure.NIC:
          occurrences: [0..UNBOUNDED]