1. Mapping between NFV model and TOSCA
Shitao li (huawei)
Matt Rutkowski (IBM)
John Crandall (Brocade)

2. NFV model Definition of VDU in NFV003
The NFV model of VDU and VNFD are fully aligned with TOSCA composition concept.
2018/2/9

3. Vdu concept = From the infrastructure point of view VM Virtual storageCP VM
Virtual storage CP
+image
+image
2018/2/9

4. Vdu concept In IFA model In tosca VDU CP VM Virtual storage CP +image
In UML model, this means aggregation (VduCpd, VirtualConputeDesc and VirtualStorageDesc belong to VDU)
In TOSCA, node templates are the components of a service template. This is a usual way in TOSCA to describe composition.
2018/2/9

5. TOSCA normative node definition
Virtual container (VM)
Virtual storage
AttachesTo
ConnectsTo
Compute Node
ObjectStorage
BlockStorage
tosca.capabilities.compute.Container:
derived_from: tosca.capabilities.Compute
name
size
maxsize
size
volume_id
snapshot_id
num_cpus
cpu_frequency
disk_size
mem_size
capabilities:
attachment:
type: tosca.capabilities.Attachment
capabilities:
storage_endpoint:
type: tosca.capabilities.Endpoint
2018/2/9

6. VDU mapping option 1 X VM aggregation AttachesTo or ConnectsTo
Virtual Storage
2018/2/9

7. VDU mapping option 2 (suggested way to go)
virtualComputeDesc M 1
Identifier (reference to VirtualComputeDesc)
Describes CPU, Memory and acceleration requirements of the Virtualisation Container realizing this Vdu. See clause
virtualStorageDesc
0..N
Identifier (reference to VirtualStorageDesc)
Describes storage requirements for a VirtualStorage instance attached to the virtualisation container created from virtualComputeDesc defined for this Vdu. See clause
VDU contains:
1 or more internal connection points
Reference to 1 virtual compute descriptor
Reference to 0 or more virtual storage descriptors
Zero or 1 SW image descriptor
One set of VNFC configurable properties
virtualComputeDescId
requestAdditionalCapabilities
virtualMemory
virtualCpu
VDU
AttachesTo or
ConnectsTo VM
Virtual Storage
2018/2/9

8. Proposal VDU internalCpd virtualCompute Description property req
virtualStorage
Descriptor.Block
VDU
internalCpd
virtualCompute
Description
VduCpd
VirtualStorageDescriptor
property
req
cap
req
VirtualComputeDescriptor
property
VirtualLinkable
cap
cap
AttachesTo
property
Attachment
req
Nfv_compute
input
property
VirtualBindable
input
req
VirtualBindsTo
virtualStorage
Descriptor.Object
Attachment
Connect
cap
VirtualStorageDescriptor
req
Substitution mappings
VirtualBindable
ConnectsTo
artifact
cap
swImageDescriptor
Connect
2018/2/9

9. Attributes of the VNFD information element
Attributes of the Vdu information element
Attribute
Qualifier
Cardinality
Content
vnfdId M 1
Identifier
vnfProvider
String
vnfProductName
vnfSoftwareVersion
Version
vnfdVersion
vnfProductInfoName
0..1
vnfProductInfoDescription
vnfmInfo
1..N
localizationLanguage
0..N
Not specified
defaultLocalizationLanguage
vdu
Vdu
virtualComputeDesc
VirtualComputeDesc
virtualStorageDesc
VirtualStorageDesc
intVirtualLinkDesc
VnfVirtualLinkDesc
vnfExtCpd
VnfExtCpd
deploymentFlavour
VnfDf
configurableProperties
VnfConfigurableProperties
modifiableAttributes
VnfInfoModifiableAttributes
lifeCycleManagementScript
LifeCycleManagementScript
elementGroup
VnfdElementGroup
vnfIndicator
VnfIndicator
autoScale
Rule
Attribute
Qualifier
Cardinality
Content
vduId M 1
Identifier
name
String
description
intCpd
1..N
VduCpd
virtualComputeDesc
Identifier (reference to VirtualComputeDesc)
virtualStorageDesc
0..N
Identifier (reference to VirtualStorageDesc)
bootOrder
KeyValuePair
swImageDesc
0..1
SwImageDesc
nfviConstraint
monitoringParameter
MonitoringParameter
configurableProperties
VnfcConfigurableProperties
reference
reference
2018/2/9

10. Mapping between VNFD model defined in NFV and TOSCA
Attribute
Qualifier
Cardinality
Content
TOSCA model
vnfdId M 1
Identifier
Metadata or properties
vnfProvider
String
vnfProductName
vnfSoftwareVersion
Version
vnfdVersion
vnfProductInfoName
0..1
vnfProductInfoDescription
vnfmInfo
1..N
localizationLanguage
0..N
Not specified
defaultLocalizationLanguage
vdu
Vdu
Node template (corresponding note type is defined by a service template)
virtualComputeDesc
VirtualComputeDesc
Data type in DSL_definition
virtualStorageDesc
VirtualStorageDesc
intVirtualLinkDesc
VnfVirtualLinkDesc
Node template
vnfExtCpd
VnfExtCpd
Node type
deploymentFlavour
VnfDf ?
configurableProperties
VnfConfigurableProperties
properties
modifiableAttributes
VnfInfoModifiableAttributes
lifeCycleManagementScript
LifeCycleManagementScript
interface
elementGroup
VnfdElementGroup
Group
vnfIndicator
VnfIndicator
Properties or attributes
autoScale
Rule
Properties or policy

11. Mapping between VDU model defined in NFV and TOSCA
Attribute
Qualifier
Cardinality
Content
TOSCA Model
vduId M 1
Identifier
Metadata or properties
name
String
description
intCpd
1..N
VduCpd
Node type
virtualComputeDesc
Identifier (reference to VirtualComputeDesc)
virtualStorageDesc
0..N
Identifier (reference to VirtualStorageDesc)
bootOrder
KeyValuePair
properties
swImageDesc
0..1
SwImageDesc
Artifact
nfviConstraint
monitoringParameter
MonitoringParameter ?
configurableProperties
VnfcConfigurableProperties

12. tosca.capabilities.Compute
The definition of VirtualComputeDesc in NFV much more align with tosca.capabilities.Compute
tosca.capabilities.Compute
2018/2/9

13. Combining three tables for VirtualComputeDesc together
2018/2/9

14. Defining a new capability tosca.capabilities.nfv.Compute.Container
2018/2/9

15. VirtualComputeDescriptor note type
2018/2/9

16. VirtualStorageDescriptor note type
2018/2/9

17. VDU service template and node type example
2018/2/9

18. 2018/2/9

19. Suggestion
1，using a service template to describe a VDU, and using the substitution mapping feature to abstract the VDU to be a new VDU node type.
2, Defining virtualComputeDesc and virtualStorageDesc in the DSL_definitions section in a VNFD service template, so multiple VDUs can reference the same virtualComputeDesc or virtualStorageDesc.
3, Defining swImageDesc as a artifact in a VDU.

20. Thank you!
2018/2/9

21. If substitution mapping is not usedVL
InternalCpd
InternalCpd
VDU1
VDU2
VirtualComputeDesc
VirtualComputeDesc
attachsTo
attachsTo
attachsTo
VirtualStorageDesc
VirtualStorageDesc
VirtualStorageDesc
2018/2/9

22. Scaling should based on VDU, adding or delete VDU instances (VNFCs).
In NFV, VDU is the smallest unit of VNF, for VNF lifecycle management, it has to based on VDU level, all the lifecycle management operation can not directly target to virtualComputeDesc or virtualStorageDesc. E.g.
Scaling should based on VDU, adding or delete VDU instances (VNFCs).
2018/2/9

23. Remaining issues Issue:
In TOSCA, only compute node can contain an artifact. We don’t have the mechanism to describe how to store a software image into a virtual storage.
Proposal:
Option 1: allow virtual storage to have an artifact.
2018/2/9