5.1. ONAP TOSCA VNFD Requirements¶
The following sub-clauses describe the numbered requirements for VNF Descriptor (VNFD) or in other words the VNF Service Template based on the most updated draft of ETSI NFV-SOL001 standard for VNF Descriptor. The ETSI standard specifies a NFV specific data model using TOSCA/YAML data model constructs specified in TOSCA Simple Profile in YAML v.1.2.
The requirements for TOSCA/CSAR based VNF package are described as well and they are based on ETSI NFV-SOL004 standard.
- ETSI GS NFV-SOL001 draft v.0.10.0
- TOSCA SIMPLE Profile in YAML v.1.2
- ETSI GS NFV-SOL004 v.2.5.1
5.1.3. Intended Audience¶
This document is intended for developers of VNF TOSCA templates that will be orchestrated by ONAP. The document is also applicable for creating RFP’s with the list of required TOSCA/YAML features supported by VNF provider.
ONAP implementations of Network Cloud supports TOSCA Templates, also referred to as TOSCA in this document.
ONAP requires the TOSCA Templates to follow a specific format. This document provides the mandatory, recommended, and optional requirements associated with this format.
The document includes three charters to help the VNF providers to use the VNF model design tools and understand the VNF package structure and VNF TOSCA templates.
In the ONAP, VNF Package and VNFD template can be designed by manually or via model designer tools. VNF model designer tools can provide the GUI and CLI tools for the VNF provider to develop the VNF Package and VNFD template.
The VNF package structure is align to the NFV TOSCA protocol, and supports CSAR
The VNFD and VNF package are all align to the NFV TOSCA protocol, which supports multiple TOSCA template yaml files, and also supports self-defined node or other extensions.
5.1.6. VNF CSAR Package¶
22.214.171.124. CSAR Overview¶
TOSCA YAML CSAR file is an archive file using the ZIP file format whose structure complies with the TOSCA Simple Profile YAML v1.2 Specification. The CSAR file may have one of the two following structures:
- CSAR containing a TOSCA-Metadata directory, which includes the TOSCA.meta metadata file providing an entry information for processing a CSAR file.
- CSAR containing a single yaml (.yml or .yaml) file at the root of the archive. The yaml file is a TOSCA definition template that contains a metadata section with template_name and template_version metadata. This file is the CSAR Entry-Definitions file.
126.96.36.199. VNF Package Structure and Format¶
The VNF package MUST be arranged as a CSAR archive as specified in TOSCA Simple Profile in YAML 1.2.
The VNF package provided by a VNF vendor MAY be either with TOSCA-Metadata directory (CSAR Option 1) or without TOSCA-Metadata directory (CSAR Option 2) as specified in ETSI GS NFV-SOL004. On-boarding entity (ONAP SDC) must support both options.
Note: SDC supports only the CSAR Option 1 in Casablanca. The Option 2 will be considered in future ONAP releases,
188.8.131.52. VNF Package Contents¶
The VNF package MUST contain all standard artifacts as specified in ETSI GS NFV-SOL004 including Manifest file, VNFD (or Main TOSCA/YAML based Service Template) and other optional artifacts. CSAR Manifest file as per SOL004 - for example ROOT\ MainServiceTemplate.mf
The VNF package Manifest file MUST contain: VNF package meta-data, a list of all artifacts (both internal and external) entry’s including their respected URI’s, an algorithm to calculate a digest and a digest result calculated on the content of each artifacts, as specified in ETSI GS NFV-SOL004. The VNF Package MUST include VNF Identification Data to uniquely identify the resource for a given VNF provider. The identification data must include: an identifier for the VNF, the name of the VNF as was given by the VNF provider, VNF description, VNF provider, and version.
The VNF provider MUST provide their testing scripts to support testing as specified in ETSI NFV-SOL004 - Testing directory in CSAR
The VNF provider MUST provide the binaries and images needed to instantiate the VNF (VNF and VNFC images) either as:
- Local artifact in CSAR: ROOT\Artifacts\ VNF_Image.bin
- externally referred (by URI) artifact in Manifest file (also may be referred by VNF Descriptor)
Note: Currently, ONAP doesn’t have the capability of Image management, we upload the image into VIM/VNFM manually.
The VNF provider MUST enumerate all of the open source licenses their VNF(s) incorporate. CSAR License directory as per ETSI SOL004.
for example ROOT\Licenses\ License_term.txt
184.108.40.206. VNF Package Authenticity¶
Will be added in future releases.
220.127.116.11. VNF Package ONAP Extensions¶
- TOACA data type extension tosca.datatypes.nfv.injectFile is used for vCPE use case.
- ONAP extensions for VNF package that is currently proposed for Dublin release is VES extension described below.
5.1.7. TOSCA Introduction¶
TOSCA defines a Meta model for defining IT services. This Meta model defines both the structure of a service as well as how to manage it. A Topology Template (also referred to as the topology model of a service) defines the structure of a service. Plans define the process models that are used to create and terminate a service as well as to manage a service during its whole lifetime.
A Topology Template consists of a set of Node Templates and Relationship Templates that together define the topology model of a service as a (not necessarily connected) directed graph. A node in this graph is represented by a Node Template. A Node Template specifies the occurrence of a Node Type as a component of a service. A Node Type defines the properties of such a component (via Node Type Properties) and the operations (via Interfaces) available to manipulate the component. Node Types are defined separately for reuse purposes and a Node Template references a Node Type and adds usage constraints, such as how many times the component can occur.
Figure 1: Structural Elements of Service Template and their Relations
5.1.8. TOSCA Modeling Principles & Data Model¶
This section describing TOSCA modeling principles and data model for NFV, which shall be based on [TOSCA-1.0] and [TOSCA-Simple-Profile-YAML V1.0], or new type based on ETSI NFV requirements, etc.
5.1.9. TOSCA VNF Descriptor¶
The VNF Descriptor (VNFD) provided by VNF vendor MUST comply with TOSCA/YAML based Service template for VNF descriptor specified in ETSI NFV-SOL001.
Note: As the ETSI NFV-SOL001 is work in progress the below tables summarizes the TOSCA definitions agreed to be part of current version of NFV profile and that VNFD MUST comply with in ONAP Release 2+ Requirements.
The VNFD MUST comply with ETSI GS NFV-SOL001 document endorsing the above mentioned NFV Profile and maintaining the gaps with the requirements specified in ETSI GS NFV-IFA011 standard.
The VNFD MAY include TOSCA/YAML definitions that are not part of NFV Profile. If provided, these definitions MUST comply with TOSCA Simple Profile in YAML v.1.2.
A VNFD is a deployment template which describes a VNF in terms of deployment and operational behavior requirements. It contains virtualized resources (nodes) requirements as well as connectivity and interfaces requirements and MUST comply with info elements specified in ETSI GS NFV-IFA 011. The main parts of the VNFD are the following:
- VNF topology: it is modeled in a cloud agnostic way using virtualized containers and their connectivity. Virtual Deployment Units (VDU) describe the capabilities of the virtualized containers, such as virtual CPU, RAM, disks; their connectivity is modeled with VDU Connection Point Descriptors (VduCpd), Virtual Link Descriptors (VnfVld) and VNF External Connection Point Descriptors (VnfExternalCpd);
- VNF deployment aspects: they are described in one or more deployment flavours, including configurable parameters, instantiation levels, placement constraints (affinity / antiaffinity), minimum and maximum VDU instance numbers. Horizontal scaling is modeled with scaling aspects and the respective scaling levels in the deployment flavours;
Note: The deployment aspects (deployment flavour etc.) are postponed for future ONAP releases.
- VNF lifecycle management (LCM) operations: describes the LCM operations supported per deployment flavour, and their input parameters; Note, thatthe actual LCM implementation resides in a different layer, namely referring to additional template artifacts.
The following table defines the major TOSCA Types specified in ETSI NFV-SOL001 standard draft. The VNFD provided by a VNF vendor MUST comply with the below definitions:
From ETSI GS NFV-IFA 011
|Implementation in TOSCA NFV Profile and Endorsement in ETSI GS NFV-SOL001||Derived from||Description||Supported in ONAP Casablanca release|
|VNFD||tosca.nodes.nfv.VNF||tosca.nodes.Root||TOSCA main service template and describes a VNF in terms of deployment and operational behavior requirements, connectivity, interfaces and virtualized resource requirements.||Y|
VDU Compute Descriptor
Represents VNF-C (or VM) with deployment flavours.
Represents the virtual compute part of a VDU entity which it mainly describes the deployment and operational behavior of a VNFC.
Note: Currently not directly supported but allowed via tosca.capabilities.nfv.VirtualCompute
|Y but different way|
|VDU VirtualCompute Descriptor||tosca.capabilities.nfv.VirtualCompute||tosca.capabilities.Root||Represents the virtual compute part of a VDU entity which it mainly describes the deployment and operational behavior of a VNFC||Y|
VDU VirtualStorage Descriptor
Represents a virtual storage entity which it describes the deployment and operational behavior of a virtual storage resources.
Note: This node type is split into three in latest SOL001 draft how the data model uses an older version for Casablanca release.
|Cpd - Connection Point Descriptor||tosca.nodes.nfv.Cp||tosca.nodes.Root||Represents network connectivity to a compute resource or a VL - abstract type used as parent for the various Cpd types.||Y|
|tosca.nodes.nfv.VduCp||tosca.nodes.nfv.Cp||Represents a type of TOSCA Cpd node and describes network connectivity between a VNFC instance (based on this VDU) and an internal VL||Y|
|tosca.nodes.nfv.VnfVirtualLink||tosca.nodes.Root||Node type represents a logical internal virtual link||Y|
VnfExtCpd (External Connection Point)
|tosca.nodes.nfv.VnfExtCp||tosca.nodes.Root||Represents a logical external connection point, exposed by this VNF enabling connecting with Virtual Link,||N|
Artifact type describes the software image which is directly loaded on the Virtualisation container of the VDU or is to be loaded on a virtual storage resource.
Note: Currently not supported in Casablanca release as well as SW image artifact in CSAR
VnfDf info element
|tosca.capabilities.nfv.DeploymentFlavour||tosca.capabilities.Root||Note: Current ONAP release support a single deployment flavour||N|
R-96634 The VNF providerMUSTdescribe scaling capabilities to manage scaling characteristics of the VNF.
|tosca.datatypes.nfv.ScalingAspect||tosca.datatypes.Root||TBD in ETSI NFV-SOL001||N|
18.104.22.168. Data Types¶
The below table includes the data types used by NFV node and is based on TOSCA/YAML constructs specified in draft GS NFV-SOL 001. The node data definitions/attributes used in VNFD MUST comply with the below table.
|Info Element From ETSI GS NFV-IFA 011||Implementation in ETSI NFV-SOL001||Derived from||Description||Supported in ONAP Casablanca release|
|l2AddressData||tosca.datatype.nfv.L2AddressData||tosca.datatypes.Root||Describes the information on the MAC addresses to be assigned to the connection point(s) instantiated from the parent Connection Point Descriptor||Y|
|L3AddressData||tosca.datatypes.nfv.L3AddressData||tosca.datatypes.Root||A complex TOSCA data type describe L3AddressData information element, it provides the information on the IP addresses to be assigned to the connection point instantiated from the parent Connection Point Descriptor||Y|
|AddressData||tosca.datatypes.nfv.AddressData||tosca.datatypes.Root||A complex TOSCA data type describe AddressData information elemen, it provides information on the addresses to be assigned to the connection point(s) instantiated from a Connection Point||Y|
|VirtualNetworkInterfaceRequirements||tosca.datatypes.nfv.VirtualNetworkInterfaceRequirements||tosca.datatypes.Root||A complex TOSCA data type describe VirtualNetworkInterfaceRequirements information element, it provides the information to specify requirements on a virtual network interface realizing the CPs instantiated from this CPD||Y|
|ConnectivityType||tosca.datatypes.nfv.ConnectivityType||tosca.datatypes.Root||A complex TOSCA data type used to describe ConnectivityType information element||Y|
|RequestedAdditionalCapabilityData||tosca.datatypes.nfv.RequestedAdditionalCapability||tosca.datatypes.Root||Describes additional capability for a particular VDU e.g. acceleration||Y|
|VirtualMemoryData||tosca.datatypes.nfv.VirtualMemory||tosca.datatypes.Root||Describes virtual memory for virtualized compute descriptor||Y|
|VirtualCpuData||tosca.datatypes.nfv.VirtualCpu||tosca.datatypes.Root||Describes virtual CPU (s) for virtualized compute descriptor||Y|
|VirtualCpuPinning||tosca.datatypes.nfv.VirtualCpuPinning||tosca.datatypes.Root||Describes CPU pinning configuration for a particular CPU||Y|
|VnfcConfigurableProperties||tosca.datatypes.nfv.VnfcConfigurableProperties||tosca.datatypes.Root||Describes additional configurable properties of a VNFC||Y|
Describes additional instantiation data for a given VDU used in the a specific deployment flavour.
Note: Deployment flavour is not supported in Casablanca release.
Describes additional instantiation data for a given VL used in the a specific deployment flavour.
Note: Deployment flavour is not supported in Casablanca release.
Describes a given level of resources to be instantiated within a deployment flavour in term of the number VNFC instances to be created from each VDU.
Note: Deployment flavour is not supported in Casablanca release.
|VduLevel||tosca.datatypes.nfv.VduLevel||tosca.datatypes.Root||Indicates for a given VDU in a given level the number of instances to deploy||Y|
|ScaleInfo||tosca.datatypes.nfv.ScaleInfo||tosca.datatypes.Root||Indicates for a given Scaling Aspect the corresponding Scaling Level||Y|
|Inject File||tosca.datatypes.nfv.injectFile||tosca.datatypes.Root||Note: ONAP extension used for vCPE use case||Y|
|Link Bit Rate Requirements||tosca.datatypes.nfv.LinkBitRateRequirements||tosca.datatypes.Root||Y|
|Quality of service data (loss ratio etc.)||tosca.datatypes.nfv.Qos||tosca.datatypes.Root||Y|
|Connection point protocol||tosca.datatypes.nfv.CpProtocolData||tosca.datatypes.Root||Y|
|VNF Configurable Properties||tosca.datatypes.nfv.VnfConfigurableProperties||tosca.datatypes.Root||Y|
|VNF Additional Configurable Properties||tosca.datatypes.nfv.VnfAdditionalConfigurableProperties||tosca.datatypes.Root||Y?|
|VnfInfo Modifiable Attributes||tosca.datatypes.nfv.VnfInfoModifiableAttributes||tosca.datatypes.Root||Y|
|VnfInfo Modifiable Attributes Extension||tosca.datatypes.nfv.VnfInfoModifiableAttributesExtensions||tosca.datatypes.Root||Y|
|VnfInfo Modifiable Attributes Metadata||tosca.datatypes.nfv.VnfInfoModifiableAttributesMetadata||tosca.datatypes.Root||Y|
The below table describes the data types used for LCM configuration and is based on TOSCA constructs specified in draft GS NFV-SOL 001. The LCM configuration data elements used in VNFD MUST comply with the below table.
From ETSI GS NFV-IFA 011
|Derived from||Description||Supported in ONAP Casablanca release|
|VnfLcmOperationsConfiguration||tosca.datatypes.nfv.VnfLcmOperationsConfiguration||tosca.datatypes.Root||Represents information to configure lifecycle management operations. Each VNF LCM operation configuration represent as a container for all attributes that effect the invocation of the VNF Lifecycle Management operations ? see below per LCM operation||Y|
|InstantiateVnfOpConfig||tosca.datatypes.nfv.VnfInstantiateOperationConfiguration||tosca.datatypes.Root||Represents information that affect the invocation of the InstantiateVnf operation||Y|
|ScaleVnfOpConfig||tosca.datatypes.nfv.VnfScaleOperationConfiguration||tosca.datatypes.Root||Represents information that affect the invocation of the ScaleVnf operation||Y|
|ScaleVnfToLevelOpConfig||tosca.datatypes.nfv.VnfScaleToLevelOperationConfiguration||tosca.datatypes.Root||Represents information that affect the invocation of the ScaleVnfToLevel operation||Y|
|HealVnfOpConfig||tosca.datatypes.nfv.VnfHealOperationConfiguration||tosca.datatypes.Root||Represents information that affect the invocation of the HealVnf operation||Y|
|TerminateVnfOpConfig||tosca.datatypes.nfv.VnfTerminateOperationConfiguration||tosca.datatypes.Root||Represents information that affect the invocation of the TerminateVnf||Y|
|OperateVnfOpConfig||tosca.datatypes.nfv.VnfOperateOperationConfiguration||tosca.datatypes.Root||Represents information that affect the invocation of the OperateVnf operation||Y|
|ChangeVnfFlavourOpConfig||tosca.datatypes.nfv.VnfChangeFlavourOperationConfiguration||tosca.datatypes.Root||Defines attributes for invocation of ChangeVnfFlavour operation||N|
Defines attributes for invocation of ChangeExtVnfConnectivty operation.
Note: External VNF connectivity is postponed to future ONAP releases.
22.214.171.124. Artifact Types¶
No artifact type is currently supported in ONAP.
126.96.36.199. Capability Types¶
The VNFD provided by VNF vendor may use the below described TOSCA capabilities. An on-boarding entity (ONAP SDC) MUST support them.
tosca.capabilities.nfv.VirtualBindableA node type that includes the VirtualBindable capability indicates that it can be pointed by tosca.relationships.nfv.VirtualBindsTo relationship type.
tosca.capabilities.nfv.VirtualLinkableA node type that includes the VirtualLinkable capability indicates that it can be pointed by tosca.relationships.nfv.VirtualLinksTo relationship.
tosca.capabilities.nfv.ExtVirtualLinkableA node type that includes the ExtVirtualLinkable capability indicates that it can be pointed by tosca.relationships.nfv.VirtualLinksTo relationship.
Note: This capability type is used in Casablanca how it does not exist in the last SOL001 draft
tosca.capabilities.nfv.VirtualCompute and tosca.capabilities.nfv.VirtualStorage includes flavours of VDU
188.8.131.52. Relationship Types¶
The VNFD provided by VNF vendor may use the below described TOSCA relationships. An on-boarding entity (ONAP SDC) MUST support them.
tosca.relationships.nfv.VirtualBindsToThis relationship type represents an association relationship between VDU and CP node types.
tosca.relationships.nfv.VirtualLinksToThis relationship type represents an association relationship between the VduCpd’s and VirtualLinkDesc node types.
184.108.40.206. Interface Types¶
The VNFD provided by VNF vendor may use the below described TOSCA interface types. An on-boarding entity (ONAP SDC) MUST support them.
tosca.interfaces.nfv.vnf.lifecycle.Nfv supports LCM operations
5.1.10. HPA Requirements¶
- SR-IOV Passthrought
Definitions of SRIOV_Port are necessary if VDU supports SR-IOV. Here is an example.
node\_templates: vdu\_vNat: SRIOV\_Port: attributes: tosca\_name: SRIOV\_Port properties: virtual\_network\_interface\_requirements: - name: sriov support\_mandatory: false description: sriov requirement: SRIOV: true role: root description: sriov port layer\_protocol: ipv4 requirements: - virtual\_binding: capability: virtual\_binding node: vdu\_vNat relationship: type: tosca.relationships.nfv.VirtualBindsTo - virtual\_link: node: tosca.nodes.Root type: tosca.nodes.nfv.VduCpd substitution\_mappings: requirements: sriov\_plane: - SRIOV\_Port - virtual\_link node\_type: tosca.nodes.nfv.VNF.vOpenNAT
Definitions of mem_page_size as one property shall be added to Properties and set the value to large if one VDU node supports huagepages. Here is an example.
node\_templates: vdu\_vNat: Hugepages: attributes: tosca\_name: Huge\_pages\_demo properties: mem\_page\_size:large
- NUMA (CPU/Mem)
Likewise, we shall add definitions of numa to requested_additional_capabilities if we wand VUD nodes to support NUMA. Here is an example.
topology\_template: node\_templates: vdu\_vNat: capabilities: virtual\_compute: properties: virtual\_memory: numa\_enabled: true virtual\_mem\_size: 2 GB requested\_additional\_capabilities: numa: support\_mandatory: true requested\_additional\_capability\_name: numa target\_performance\_parameters: hw:numa\_nodes: "2" hw:numa\_cpus.0: "0,1" hw:numa\_mem.0: "1024" hw:numa\_cpus.1: "2,3,4,5" hw:numa\_mem.1: "1024"
Definitions of Hyper-Theading are necessary as one of requested_additional_capabilities of one VUD node if that node supports Hyper-Theading. Here is an example.
topology\_template: node\_templates: vdu\_vNat: capabilities: virtual\_compute: properties: virtual\_memory: numa\_enabled: true virtual\_mem\_size: 2 GB requested\_additional\_capabilities: hyper\_threading: support\_mandatory: true requested\_additional\_capability\_name: hyper\_threading target\_performance\_parameters: hw:cpu\_sockets : "2" hw:cpu\_threads : "2" hw:cpu\_cores : "2" hw:cpu\_threads\_policy: "isolate"
Definitions of ovs_dpdk are necessary as one of requested_additional_capabilities of one VUD node if that node supports dpdk. Here is an example.
topology\_template: node\_templates: vdu\_vNat: capabilities: virtual\_compute: properties: virtual\_memory: numa\_enabled: true virtual\_mem\_size: 2 GB requested\_additional\_capabilities: ovs\_dpdk: support\_mandatory: true requested\_additional\_capability\_name: ovs\_dpdk target\_performance\_parameters: sw:ovs\_dpdk: "true"
5.1.11. VES Requirements¶
Note: ONAP proprietary extensions in ETSI SOL004 standards for VES support in CSAR package need to be manually loaded in R3 (Casablanca) for VNF and PNFs. Platform support will be developed for this in upcoming releases.
5.1.12. NFV TOSCA Type Definition¶
This capability is used with the properties specified in ETSI SOL001 draft.
The NFV Virtualization Deployment Unit (VDU) compute node type represents a VDU entity which it describes the deployment and operational behavior of a VNF component (VNFC), as defined by [ETSI NFV IFA011].
|Type Qualified Name||tosca:VDU.Compute|
|virtual_compute||tosca.capabilities.nfv.VirtualCompute||Describes virtual compute resources capabilities.|
Monitoring parameter, which can be tracked for a VNFC based on this VDU
Examples include: memory-consumption, CPU-utilisation, bandwidth-consumption, VNFC downtime, etc.
editor note: need to create a capability type
|Defines ability of VirtualBindable|
tosca.nodes.nfv.VDU.Compute: derived\_from: tosca.nodes.Compute properties: name: type: string required: true description: type: string required: true boot\_order: type: list # explicit index (boot index) not necessary, contrary to IFA011 entry\_schema: type: string required: false nfvi\_constraints: type: list entry\_schema: type: string required: false configurable\_properties: type: map entry\_schema: type: tosca.datatypes.nfv.VnfcConfigurableProperties required: true attributes: private\_address: status: deprecated public\_address: status: deprecated networks: status: deprecated ports: status: deprecated capabilities: virtual\_compute: type: tosca.capabilities.nfv.VirtualCompute virtual\_binding: type: tosca.capabilities.nfv.VirtualBindable #monitoring\_parameter: # modeled as ad hoc (named) capabilities in VDU node template # for example: #capabilities: # cpu\_load: tosca.capabilities.nfv.Metric # memory\_usage: tosca.capabilities.nfv.Metric host: #Editor note: FFS. How this capabilities should be used in NFV Profile| type: *tosca.capabilities.Container* valid\_source\_types: [*tosca.nodes.SoftwareComponent*] occurrences: [0,UNBOUNDED] endpoint: occurrences: [0,0] os: occurrences: [0,0] scalable: #Editor note: FFS. How this capabilities should be used in NFV Profile type: *tosca.capabilities.Scalable* binding: occurrences: [0,UNBOUND] requirements: - virtual\_storage: capability: tosca.capabilities.nfv.VirtualStorage relationship: tosca.relationships.nfv.VDU.AttachedTo node: tosca.nodes.nfv.VDU.VirtualStorage occurences: [ 0, UNBOUNDED ] - local\_storage: #For NFV Profile, this requirement is deprecated. occurrences: [0,0] artifacts: - sw\_image: file: type: tosca.artifacts.nfv.SwImage
Note: currently not supported.
|SwImage||Yes||tosca.artifacts.nfv.SwImage||Describes the software image which is directly realizing this virtual storage|
The NFV VirtualStorage node type represents a virtual storage entity which it describes the deployment and operational behavior of a virtual storage resources, as defined by [ETSI NFV IFA011].
[editor note] open issue: should NFV profile use the current storage model as described in YAML 1.1. Pending on Shitao proposal (see NFVIFA(17)000110 discussion paper)
[editor note] new relationship type as suggested in Matt presentation. Slide 8. With specific rules of “valid_target_type”
|Type Qualified Name||tosca: VirtualStorage|
|Type Qualified Name||tosca:SwImage|
|name||yes||string||Name of this software image|
|version||yes||string||Version of this software image|
|checksum||yes||string||Checksum of the software image file|
|container_format||yes||string||The container format describes the container file format in which software image is provided.|
|disk_format||yes||string||The disk format of a software image is the format of the underlying disk image|
|min_disk||yes||scalar-unit.size||The minimal disk size requirement for this software image.|
|min_ram||no||scalar-unit.size||The minimal RAM requirement for this software image.|
|Size||yes||scalar-unit.size||The size of this software image|
|sw_image||yes||string||A reference to the actual software image within VNF Package, or url.|
|operating_system||no||string||Identifies the operating system used in the software image.|
|supported_virtualization_enviroment||no||list||Identifies the virtualization environments (e.g. hypervisor) compatible with this software image|
tosca.artifacts.nfv.SwImage: derived\_from: tosca.artifacts.Deployment.Image properties or metadata: #id: # node name name: type: string required: true version: type: string required: true checksum: type: string required: true container\_format: type: string required: true disk\_format: type: string required: true min\_disk: type: scalar-unit.size # Number required: true min\_ram: type: scalar-unit.size # Number required: false size: type: scalar-unit.size # Number required: true sw\_image: type: string required: true operating\_system: type: string required: false supported\_virtualisation\_environments: type: list entry\_schema: type: string required: false