summaryrefslogtreecommitdiffstats
path: root/docs/Chapter5/Tosca.rst
blob: 2aaae3fa9c4aa17372bc937aabf35b4aa81e51ba (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
.. Modifications Copyright © 2017-2018 AT&T Intellectual Property.

.. Licensed under the Creative Commons License, Attribution 4.0 Intl.
   (the "License"); you may not use this documentation except in compliance
   with the License. You may obtain a copy of the License at

.. https://creativecommons.org/licenses/by/4.0/

.. Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.


TOSCA YAML
----------


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

This reference document is the VNF TOSCA Template Requirements for
ONAP, which provides recommendations and standards for building VNF
TOSCA templates compatible with ONAP initial implementations of
Network Cloud. It has the following features:

1. VNF TOSCA template designer supports GUI and CLI.

2. VNF TOSCA template is aligned to the newest TOSCA protocol, “Working
   Draft 04-Revision 06”.

3. VNF TOSCA template supports HPA features, such as NUMA, Hyper
   Threading, SRIOV, etc.

Intended Audience
^^^^^^^^^^^^^^^^^^

This document is intended for persons developing VNF TOSCA templates
that will be orchestrated by ONAP.

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.

NFV TOSCA Template
^^^^^^^^^^^^^^^^^^^^

TOSCA templates supported by ONAP must follow the requirements
enumerated in this section.

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.

VNF Descriptor Template
^^^^^^^^^^^^^^^^^^^^^^^^^

The VNF Descriptor (VNFD) describes the topology of the VNF by means of
ETSI NFV IFA011 [IFA011] terms such as VDUs, Connection Points, Virtual
Links, External Connection Points, Scaling Aspects, Instantiation Levels
and Deployment Flavours.

The VNFD (VNF Descriptor) is read by both the NFVO and the VNFM. It
represents the contract & interface of a VNF and ensures the
interoperability across the NFV functional blocks.

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 (Vld)
   and VNF External Connection Point Descriptors (VnfExternalCpd);

-  VNF deployment aspects: they are described in one or more deployment
   flavours, including instantiation levels, supported LCM operations,
   VNF LCM operation configuration parameters, placement constraints
   (affinity / antiaffinity), minimum and maximum VDU instance numbers,
   and scaling aspect for horizontal scaling.

The following table defines the TOSCA Type “derived from” values that
SHALL be used when using the TOSCA Simple Profile for NFV version 1.0
specification [TOSCA-Simple-Profile-NFV-v1.0] for NFV VNFD with aggreed
changes from ETSI SOL001 draft.

+---------------------+------------------------------------+-----------------+
| **ETSI NFV Element**| **TOSCA VNFD**                     | **Derived from**|
|                     |                                    |                 |
| **[IFA011]**        | **[TOSCA-Simple-Profile-NFV-v1.0]**|                 |
+=====================+====================================+=================+
| VNF                 | tosca.nodes.nfv.VNF                | tosca.nodes.Root|
+---------------------+------------------------------------+-----------------+
| Cpd (Connection     | tosca.nodes.nfv.Cp                 | tosca.nodes.Root|
| Point)              | tosca.nodes.nfv.Cp                 | tosca.nodes.Root|
+---------------------+------------------------------------+-----------------+
| VduCpd (internal    | tosca.nodes.nfv.VduCp              | tosca.nodes.\   |
| connection point)   |                                    | nfv.Cp          |
+---------------------+------------------------------------+-----------------+
| VnfVirtualLinkDesc  | tosca.nodes.nfv.VnfVirtualLink     | tosca.nodes.Root|
| (Virtual Link)      |                                    |                 |
+---------------------+------------------------------------+-----------------+
| VDU Virtual Storage | tosca.nodes.nfv.VDU.VirtualStorage | tosca.nodes.Root|
+---------------------+------------------------------------+-----------------+
| VDU Virtual Compute | tosca.nodes.nfv.VDU.Compute        | tosca.nodes.Root|
+---------------------+------------------------------------+-----------------+
| Software Image      |                                    |                 |
+---------------------+------------------------------------+-----------------+
| Deployment Flavour  |                                    |                 |
+---------------------+------------------------------------+-----------------+
| Scaling Aspect      |                                    |                 |
+---------------------+------------------------------------+-----------------+
| Element Group       |                                    |                 |
+---------------------+------------------------------------+-----------------+
| Instantiation       |                                    |                 |
| Level               |                                    |                 |
+---------------------+------------------------------------+-----------------+


+--------------------------------------------------------------------+
| +--------------------------------------------------------------+   |
| | 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"


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