The behavioral and deployment information of a VNF is defined in the VNF descriptor template. The template is based on the libvirt domain XML and is on-boarded in a VNF catalog. The resource requirements for CPU, memory and storage are defined in this screen and the rest of the template is inherited from the VNF Metadata object.


  • cpu_count: Number of CPUs to be allocated VNF instance when deployed
  • name (Mandatory): Name of the VNF Descriptor
  • memory_mb (Mandatory): Memory (in MB) to be allocated for VNF instance when deployed
  • vendor: The vendor generating this VNF Descriptor
  • description: A description of the VNF Descriptor
  • metadata_id (Mandatory): Id of referenced Metadata Object
  • visible: Controls if descriptor visible in catalog to create new VNF
  • entity_scope: Specify if scope of entity is Data center or Enterprise level
  • associated_vnf_threshold_policy_id: The Id of referenced VNF threshold policy
  • storage_gb (Mandatory): Disk storage (in GB) to be allocated VNF instance when deployed
  • external_id: External object ID. Used for integration with third party systems
  • type: Type of virtual network function


class fetcher
numetadata.NUMetadata metadatas
nuglobalmetadata.NUGlobalMetadata global_metadatas
nuvnfinterfacedescriptor.NUVNFInterfaceDescriptor vnf_interface_descriptors