path: root/docs/Chapter5/Tosca.rst

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ONAP TOSCA VNFD Requirements
-----------------------------


Introduction
^^^^^^^^^^^^

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.

References
^^^^^^^^^^^^^^^^^^

  1. ETSI GS NFV-SOL001 draft v.0.10.0
  2. TOSCA SIMPLE Profile in YAML v.1.2
  3. ETSI GS NFV-SOL004 v.2.5.1

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.

Scope
^^^^^^^^^^^^^^^^

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.

Overview
^^^^^^^^^^^^^^^^

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.

VNF CSAR Package
^^^^^^^^^^^^^^^^^^^^

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.

VNF Package Structure and Format
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. req::
    :id: R-51347
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    The VNF package **MUST** be arranged as a CSAR archive as specified in
    TOSCA Simple Profile in YAML 1.2.


.. req::
    :id: R-87234
    :target: VNF
    :keyword: MAY
    :introduced: casablanca

    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,


VNF Package Contents
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. req::
    :id: R-10087
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    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**

.. req::
    :id: R-01123
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    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.

.. req::
    :id: R-21322
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    The VNF provider **MUST** provide their testing scripts to support
    testing as specified in ETSI NFV-SOL004 - Testing directory in CSAR

.. req::
    :id: R-26885
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    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.

.. req::
    :id: R-40820
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    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**


VNF Package Authenticity
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Will be added in future releases.


VNF Package ONAP Extensions
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

1. TOACA data type extension tosca.datatypes.nfv.injectFile is used for vCPE
   use case.
2. ONAP extensions for VNF package that is currently proposed for Dublin
   release is VES extension described below. 

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.

|image1|

Figure 1: Structural Elements of Service Template and their Relations

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.

TOSCA VNF Descriptor 
^^^^^^^^^^^^^^^^^^^^^^^^^

General
~~~~~~~~~~

.. req::
    :id: R-35854
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    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.


.. req::
    :id: R-65486
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    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.


.. req::
    :id: R-17852
    :target: VNF
    :keyword: MAY
    :introduced: casablanca

    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.

.. req::
    :id: R-46527
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    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.

.. req::
    :id: R-15837
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    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:


.. csv-table:: **TOSCA Definition**
   :file: TOSCA_descriptor.csv
   :header-rows: 1
   :align: center
   :widths: auto

Data Types
~~~~~~~~~~~~

.. req::
    :id: R-54356
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    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.


.. csv-table:: **NFV Data Types**
   :file: NFV_data_type.csv
   :header-rows: 1
   :align: center
   :widths: auto

.. req::
    :id: R-54876
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    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.

.. csv-table:: **LCM Configuration**
   :file: LCM_config.csv
   :header-rows: 1
   :align: center
   :widths: auto


Artifact Types
~~~~~~~~~~~~~~~~~~~~~~~~

No artifact type is currently supported in ONAP. 


Capability Types
~~~~~~~~~~~~~~~~~~~~~~~~

.. req::
    :id: R-67895
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    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.VirtualBindable**

        A node type that includes the VirtualBindable capability indicates
        that it can be pointed by **tosca.relationships.nfv.VirtualBindsTo**
        relationship type.

      **tosca.capabilities.nfv.VirtualLinkable**

        A node type that includes the VirtualLinkable capability indicates
        that it can be pointed by **tosca.relationships.nfv.VirtualLinksTo**
        relationship.

      **tosca.capabilities.nfv.ExtVirtualLinkable**

        A 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


Relationship Types
~~~~~~~~~~~~~~~~~~~~~~~~

.. req::
    :id: R-95321
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    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.VirtualBindsTo**

        This relationship type represents an association relationship between
        VDU and CP node types.

      **tosca.relationships.nfv.VirtualLinksTo**

        This relationship type represents an association relationship between
        the VduCpd’s and VirtualLinkDesc node types.


Interface Types
~~~~~~~~~~~~~~~~~~~~~~~~

.. req::
    :id: R-32155
    :target: VNF
    :keyword: MUST
    :introduced: casablanca

    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


+--------------------------------------------------------------------+
| +--------------------------------------------------------------+   |
| | tosca\_definitions\_version: tosca\_simple\_yaml\_1\_0       |   |
| |                                                              |   |
| | description: VNFD TOSCA file demo                            |   |
| |                                                              |   |
| | imports:                                                     |   |
| |                                                              |   |
| | - TOSCA\_definition\_nfv\_1\_0.yaml                          |   |
| |                                                              |   |
| | - TOSCA\_definition\_nfv\_ext\_1\_0.yaml                     |   |
| |                                                              |   |
| | | **node\_types:                                             |   |
| |   tosca.nodes.nfv.VNF.vOpenNAT:                              |   |
| |   derived\_from:** tosca.nodes.nfv.VNF                       |   |
| | | **requirements:                                            |   |
| |   **- **sriov\_plane:                                        |   |
| |   capability:** tosca.capabilities.nfv.VirtualLinkable       |   |
| | | **node:** tosca.nodes.nfv.VnfVirtualLinkDesc               |   |
| | | **relationship:** tosca.relationships.nfv.VirtualLinksTo   |   |
| +--------------------------------------------------------------+   |
+====================================================================+
+--------------------------------------------------------------------+


HPA Requirements
^^^^^^^^^^^^^^^^^^

1. SR-IOV Passthrought

Definitions of SRIOV\_Port are necessary if VDU supports SR-IOV. Here is
an example.

.. code-block:: yaml

  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


2. Hugepages

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.

.. code-block:: yaml

  node\_templates:

  vdu\_vNat:

  Hugepages:

  attributes:

  tosca\_name: Huge\_pages\_demo

  properties:

  mem\_page\_size:large


3. 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.

.. code-block:: yaml

  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"


4. Hyper-Theading

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.

.. code-block:: yaml

  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"


5. OVS+DPDK

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.

.. code-block:: yaml

  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"


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.**


NFV TOSCA Type Definition
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tosca.capabilites.nfv.VirtualCompute
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This capability is used with the properties specified in ETSI SOL001 draft.

tosca.nodes.nfv.VDU.Compute
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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].**

+-----------------------+-------------------------------+
| Shorthand Name        | VDU.Compute                   |
+=======================+===============================+
| Type Qualified Name   | tosca:VDU.Compute             |
+-----------------------+-------------------------------+
| Type URI              | tosca.nodes.nfv.VDU.Compute   |
+-----------------------+-------------------------------+
| derived\_from         | tosca.nodes.Compute           |
+-----------------------+-------------------------------+



Attributes
++++++++++++

None


Capabilities
++++++++++++++

+------------+--------------------+------------+------------------------------+
| Name       | Type               | Constraints| Description                  |
+============+====================+============+==============================+
| virtual\   | tosca.\            |            | Describes virtual compute    |
| _compute   | capabilities.nfv.\ |            | resources capabilities.      |
|            | VirtualCompute     |            |                              |
+------------+--------------------+------------+------------------------------+
| monitoring\| tosca.\            | None       | Monitoring parameter, which  |
| _parameter | capabilities.nfv.\ |            | can be tracked for a VNFC    |
|            | Metric             |            | based on this VDU            |
|            |                    |            |                              |
|            |                    |            | Examples include:            |
|            |                    |            | memory-consumption,          |
|            |                    |            | CPU-utilisation,             |
|            |                    |            | bandwidth-consumption, VNFC  |
|            |                    |            | downtime, etc.               |
+------------+--------------------+------------+------------------------------+
| Virtual\   | tosca.\            |            | Defines ability of           |
| _binding   | capabilities.nfv.\ |            | VirtualBindable              |
|            | VirtualBindable    |            |                              |
|            |                    |            |                              |
|            | editor note: need  |            |                              |
|            | to create a        |            |                              |
|            | capability type    |            |                              |
+------------+--------------------+------------+------------------------------+



Definition
++++++++++++

.. code-block:: yaml

  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


Artifact
++++++++++

Note: currently not supported.

+--------+---------+----------------+------------+------------------------+
| Name   | Required| Type           | Constraints| Description            |
+========+=========+================+============+========================+
| SwImage| Yes     | tosca.\        |            | Describes the software |
|        |         | artifacts.nfv.\|            | image which is directly|
|        |         | SwImage        |            | realizing this virtual |
|        |         |                |            | storage                |
+--------+---------+----------------+------------+------------------------+


|image2|



tosca.nodes.nfv.VDU.VirtualStorage
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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”

+---------------------------+--------------------------------------+
| **Shorthand Name**        | VirtualStorage                       |
+===========================+======================================+
| **Type Qualified Name**   | tosca: VirtualStorage                |
+---------------------------+--------------------------------------+
| **Type URI**              | tosca.nodes.nfv.VDU.VirtualStorage   |
+---------------------------+--------------------------------------+
| **derived\_from**         | tosca.nodes.Root                     |
+---------------------------+--------------------------------------+

tosca.artifacts.nfv.SwImage
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+---------------------------+------------------------------------+
| **Shorthand Name**        | SwImage                            |
+===========================+====================================+
| **Type Qualified Name**   | tosca:SwImage                      |
+---------------------------+------------------------------------+
| **Type URI**              | tosca.artifacts.nfv.SwImage        |
+---------------------------+------------------------------------+
| **derived\_from**         | tosca.artifacts.Deployment.Image   |
+---------------------------+------------------------------------+

Properties
++++++++++++

+-----------------+---------+----------+------------+-------------------------+
| Name            | Required| Type     | Constraints| Description             |
+=================+=========+==========+============+=========================+
| 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\      | yes     | string   |            | The container format    |
| _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-\ |            | The minimal disk size   |
|                 |         | unit.size|            | requirement for this    |
|                 |         |          |            | software image.         |
+-----------------+---------+----------+------------+-------------------------+
| min\_ram        | no      | scalar-\ |            | The minimal RAM         |
|                 |         | unit.size|            | requirement for this    |
|                 |         |          |            | software image.         |
+-----------------+---------+----------+------------+-------------------------+
| Size            | yes     | scalar-\ |            | The size of this        |
|                 |         | unit.size|            | software image          |
+-----------------+---------+----------+------------+-------------------------+
| sw\_image       | yes     | string   |            | A reference to the      |
|                 |         |          |            | actual software image   |
|                 |         |          |            | within VNF Package, or  |
|                 |         |          |            | url.                    |
+-----------------+---------+----------+------------+-------------------------+
| operating\      | no      | string   |            | Identifies the operating|
| _system         |         |          |            | system used in the      |
|                 |         |          |            | software image.         |
+-----------------+---------+----------+------------+-------------------------+
| supported\      | no      | list     |            | Identifies the          |
| _virtualization\|         |          |            | virtualization          |
| _enviroment     |         |          |            | environments (e.g.      |
|                 |         |          |            | hypervisor) compatible  |
|                 |         |          |            | with this software image|
+-----------------+---------+----------+------------+-------------------------+


Definition
+++++++++++

.. code-block:: yaml

  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


.. |image1| image:: ../Image1.png
   :width: 5.76806in
   :height: 4.67161in

.. |image2| image:: ../Image2.png
   :width: 5.40486in
   :height: 2.46042in