Scale of VNF instantiated according to the procedure of "ETSI NFV-SOL VNF Deployment as VM with TOSCA[1]" fails.
This is because, the scale process determines whether or not the scale can be set,  but vnf_instantiated_info.scale_status is not set in VNF deployment with TOSCA.

* Instantiated VNF information
```
$ openstack vnflcm list
+--------------------------------------+------------------------------------------+---------------------+--------------+----------------------+------------------+--------------------------------------+
| ID                                   | VNF Instance Name                        | Instantiation State | VNF Provider | VNF Software Version | VNF Product Name | VNFD ID                              |
+--------------------------------------+------------------------------------------+---------------------+--------------+----------------------+------------------+--------------------------------------+
| 2c1f7511-5035-4cc7-b3b9-f05290a0eb45 | vnf-2c1f7511-5035-4cc7-b3b9-f05290a0eb45 | INSTANTIATED        | Company      | 1.0                  | Sample VNF       | b1bb0ce7-ebca-4fa7-95ed-4840d7000010 |
+--------------------------------------+------------------------------------------+---------------------+--------------+----------------------+------------------+--------------------------------------+
```

* Error when executing Scale command
```
$ openstack vnflcm scale --type SCALE_OUT --aspect-id VDU1_scale 2c1f7511-5035-4cc7-b3b9-f05290a0eb45
409-tackerFault
```

* Error logs
```
tacker-server[1000]: 2021-02-10 16:44:19.131 INFO tacker.wsgi [req-4fb1a060-6f5d-4d59-b675-c2d7a0fc1012 nfv_user nfv] POST http://127.0.0.1:9890/vnflcm/v1/vnf_instances/2c1f7511-5035-4cc7-b3b9-f05290a0eb45/scale
tacker-server[1000]: 2021-02-10 16:44:19.134 DEBUG tacker.db.vnfm.vnfm_db [req-4fb1a060-6f5d-4d59-b675-c2d7a0fc1012 nfv_user nfv] vnf_db <tacker.db.vnfm.vnfm_db.VNF[object at 7ff1429171f0] {tenant_id='4b8e276e25fc4e658050621d57a6c349', id='2c1f7511-5035-4cc7-b3b9-f05290a0eb45', created_at=datetime.datetime(2021, 2, 10, 7, 38, 11), updated_at=datetime.datetime(2021, 2, 10, 7, 39, 17), deleted_at=datetime.datetime(1, 1, 1, 0, 0), vnfd_id='b1bb0ce7-ebca-4fa7-95ed-4840d7000010', name='vnf-2c1f7511-5035-4cc7-b3b9-f05290a0eb45', description=None, instance_id='2cf6ffd0-530c-4f72-ab6d-c9270d18a9c8', mgmt_ip_address=None, status='ACTIVE', vim_id='d0728d23-f47f-4789-8011-78b966ad3e50', placement_attr={'regions': ['RegionOne']}, error_reason=None}> _make_vnf_dict /usr/local/lib/python3.8/dist-packages/tacker/db/vnfm/vnfm_db.py:227
tacker-server[1000]: 2021-02-10 16:44:19.136 DEBUG tacker.db.vnfm.vnfm_db [req-4fb1a060-6f5d-4d59-b675-c2d7a0fc1012 nfv_user nfv] vnf_db attributes [<tacker.db.vnfm.vnfm_db.VNFAttribute[object at 7ff142917790] {id='34616d0b-9180-433a-8e99-cee6708788b9', vnf_id='2c1f7511-5035-4cc7-b3b9-f05290a0eb45', key='heat_template', value="heat_template_version: 2013-05-23\ndescription: 'Simple deployment flavour for Sample VNF\n\n  '\nparameters:\n  descriptor_id:\n    type: string\n    default: b1bb0ce7-ebca-4fa7-95ed-4840d7000010\n  descriptor_version:\n    type: string\n    default: 1.0\n  provider:\n    type: string\n    default: Company\n  product_name:\n    type: string\n    default: Sample VNF\n  software_version:\n    type: string\n    default: 1.0\n  vnfm_info:\n    type: comma_delimited_list\n    default:\n    - Tacker\n  flavour_id:\n    type: string\n    default: simple\n  flavour_description:\n    type: string\n    default: A simple flavour\nresources:\n  VDU1_flavor:\n    type: OS::Nova::Flavor\n    properties:\n      ram: 488\n      vcpus: 1\n      disk: 1\n  VDU1_scale:\n    type: OS::Heat::AutoScalingGroup\n    properties:\n      min_size: 1\n      max_size: 3\n      desired_capacity: 1\n      resource:\n        type: VDU1_scale.hot.yaml\n        properties:\n          internalvl1_id:\n            get_resource: internalVL1\n          internalvl2_id:\n            get_resource: internalVL2\n          internalvl3_id:\n            get_resource: internalVL3\n          vdu1_flavor_id:\n            get_resource: VDU1_flavor\n  VDU2:\n    type: OS::Nova::Server\n    properties:\n      flavor:\n        get_resource: VDU2_flavor\n      name: VDU2\n      image: e7dcaa37-15a3-4166-b4de-5cc4fe435420\n      networks:\n      - port:\n          get_resource: VDU2_CP3\n      - port:\n          get_resource: VDU2_CP4\n      - port:\n          get_resource: VDU2_CP5\n      scheduler_hints:\n        group:\n          get_resource: policy_antiaffinity_vdu2\n  VDU2_CP3:\n    type: OS::Neutron::Port\n    properties:\n      network:\n        get_resource: internalVL1\n  VDU2_CP4:\n    type: OS::Neutron::Port\n    properties:\n      network:\n        get_resource: internalVL2\n  VDU2_CP5:\n    type: OS::Neutron::Port\n    properties:\n      network:\n        get_resource: internalVL3\n  internalVL1:\n    type: OS::Neutron::Net\n    properties:\n      qos_policy:\n        get_resource: internalVL1_qospolicy\n  internalVL2:\n    type: OS::Neutron::Net\n    properties:\n      qos_policy:\n        get_resource: internalVL2_qospolicy\n  internalVL3:\n    type: OS::Neutron::Net\n    properties:\n      qos_policy:\n        get_resource: internalVL3_qospolicy\n  policy_antiaffinity_vdu1:\n    type: OS::Nova::ServerGroup\n    properties:\n      name: policy_antiaffinity_vdu1\n      policies:\n      - affinity\n  policy_antiaffinity_vdu2:\n    type: OS::Nova::ServerGroup\n    properties:\n      name: policy_antiaffinity_vdu2\n      policies:\n      - affinity\n  VDU1_scale_scale_out:\n    type: OS::Heat::ScalingPolicy\n    properties:\n      scaling_adjustment: 1\n      auto_scaling_group_id:\n        get_resource: VDU1_scale\n      adjustment_type: change_in_capacity\n  VDU1_scale_scale_in:\n    type: OS::Heat::ScalingPolicy\n    properties:\n      scaling_adjustment: -1\n      auto_scaling_group_id:\n        get_resource: VDU1_scale\n      adjustment_type: change_in_capacity\n  VDU2_flavor:\n    type: OS::Nova::Flavor\n    properties:\n      ram: 488\n      vcpus: 1\n      disk: 1\n  internalVL1_subnet:\n    type: OS::Neutron::Subnet\n    properties:\n      ip_version: 4\n      network:\n        get_resource: internalVL1\n      cidr: 33.33.0.0/24\n  internalVL1_qospolicy:\n    type: OS::Neutron::QoSPolicy\n  internalVL1_bandwidth:\n    type: OS::Neutron::QoSBandwidthLimitRule\n    properties:\n      policy:\n        get_resource: internalVL1_qospolicy\n      max_kbps: 1024.0\n  internalVL2_subnet:\n    type: OS::Neutron::Subnet\n    properties:\n      ip_version: 4\n      network:\n        get_resource: internalVL2\n      cidr: 33.34.0.0/24\n  internalVL2_qospolicy:\n    type: OS::Neutron::QoSPolicy\n  internalVL2_bandwidth:\n    type: OS::Neutron::QoSBandwidthLimitRule\n    properties:\n      policy:\n        get_resource: internalVL2_qospolicy\n      max_kbps: 1024.0\n  internalVL3_subnet:\n    type: OS::Neutron::Subnet\n    properties:\n      ip_version: 4\n      network:\n        get_resource: internalVL3\n      cidr: 33.35.0.0/24\n  internalVL3_qospolicy:\n    type: OS::Neutron::QoSPolicy\n  internalVL3_bandwidth:\n    type: OS::Neutron::QoSBandwidthLimitRule\n    properties:\n      policy:\n        get_resource: internalVL3_qospolicy\n      max_kbps: 1024.0\noutputs: {}\n"}>, <tacker.db.vnfm.vnfm_db.VNFAttribute[object at 7ff142906fd0] {id='567e896b-c2a6-4224-a266-e5ff7e0f51d8', vnf_id='2c1f7511-5035-4cc7-b3b9-f05290a0eb45', key='placement_attr', value="{'regions': ['RegionOne']}"}>, <tacker.db.vnfm.vnfm_db.VNFAttribute[object at 7ff142906d00] {id='636f2057-f843-41c1-8094-22d47e8cd664', vnf_id='2c1f7511-5035-4cc7-b3b9-f05290a0eb45', key='param_values', value="{'flavour_description': 'A simple flavour', 'descriptor_id': 'b1bb0ce7-ebca-4fa7-95ed-4840d7000010', 'descriptor_version': '1.0', 'provider': 'Company', 'product_name': 'Sample VNF', 'software_version': '1.0', 'vnfm_info': ['Tacker'], 'flavour_id': 'simple'}"}>, <tacker.db.vnfm.vnfm_db.VNFAttribute[object at 7ff1429069d0] {id='afdb7557-2a69-49d3-9266-424a76000553', vnf_id='2c1f7511-5035-4cc7-b3b9-f05290a0eb45', key='stack_name', value='vnf-2c1f7511-5035-4cc7-b3b9-f05290a0eb45'}>, <tacker.db.vnfm.vnfm_db.VNFAttribute[object at 7ff142906d60] {id='bf267080-749c-4c98-8aaa-73f4bf80b5ac', vnf_id='2c1f7511-5035-4cc7-b3b9-f05290a0eb45', key='VDU1_scale.hot.yaml', value='heat_template_version: 2013-05-23\ndescription: Scaling template\nparameters:\n  vdu1_flavor_id:\n    type: string\n  internalvl1_id:\n    type: string\n  internalvl2_id:\n    type: string\n  internalvl3_id:\n    type: string\nresources:\n  VDU1:\n    type: OS::Nova::Server\n    properties:\n      flavor:\n        get_param: vdu1_flavor_id\n      name: VDU1\n      block_device_mapping_v2:\n      - volume_id:\n          get_resource: VirtualStorage\n      networks:\n      - port:\n          get_resource: VDU1_CP3\n      - port:\n          get_resource: VDU1_CP4\n      - port:\n          get_resource: VDU1_CP5\n  VirtualStorage:\n    type: OS::Cinder::Volume\n    properties:\n      size: 1\n      image: 92b071a7-8779-481f-9868-675dafa540d3\n  VDU1_CP3:\n    type: OS::Neutron::Port\n    properties:\n      network:\n        get_param: internalvl1_id\n  VDU1_CP4:\n    type: OS::Neutron::Port\n    properties:\n      network:\n        get_param: internalvl2_id\n  VDU1_CP5:\n    type: OS::Neutron::Port\n    properties:\n      network:\n        get_param: internalvl3_id\n'}>] _make_vnf_dict /usr/local/lib/python3.8/dist-packages/tacker/db/vnfm/vnfm_db.py:228
tacker-server[1000]: 2021-02-10 16:44:19.146 ERROR tacker.api.vnflcm.v1.controller [req-4fb1a060-6f5d-4d59-b675-c2d7a0fc1012 nfv_user nfv] NOT SCALE VNF
tacker-server[1000]: 2021-02-10 16:44:19.146 INFO tacker.wsgi [req-4fb1a060-6f5d-4d59-b675-c2d7a0fc1012 nfv_user nfv] http://127.0.0.1:9890/vnflcm/v1/vnf_instances/2c1f7511-5035-4cc7-b3b9-f05290a0eb45/scale returned with HTTP 409
tacker-server[1000]: 2021-02-10 16:44:19.146 INFO tacker.wsgi [req-4fb1a060-6f5d-4d59-b675-c2d7a0fc1012 nfv_user nfv] 127.0.0.1 - - [10/Feb/2021 16:44:19] "POST /vnflcm/v1/vnf_instances/2c1f7511-5035-4cc7-b3b9-f05290a0eb45/scale HTTP/1.1" 409 280 0.048298
```

* Source code returning an error response
https://opendev.org/openstack/tacker/src/branch/master/tacker/api/vnflcm/v1/controller.py
```
    def scale(self, request, id, body):
        context = request.environ['tacker.context']
        context.can(vnf_lcm_policies.VNFLCM % 'scale')

        try:
            vnf_info = self._vnfm_plugin.get_vnf(context, id)
            if vnf_info['status'] != constants.ACTIVE:
                return self._make_problem_detail(
                    'VNF IS NOT ACTIVE', 409, title='VNF IS NOT ACTIVE')
            vnf_instance = self._get_vnf_instance(context, id)
            if not vnf_instance.instantiated_vnf_info.scale_status:
                return self._make_problem_detail(
                    'NOT SCALE VNF', 409, title='NOT SCALE VNF')
            return self._scale(context, vnf_info, vnf_instance, body)
```

* Error reason
Vnf_instantiated_info.scale_status is not set for VNF instantiated with "ETSI NFV-SOL VNF Deployment as VM with TOSCA".
Since the scale process determines whether or not the scale can be set, it is necessary to add a process to set vnf_instantiated_info.scale_status even in VNF deployment with TOSCA.
```
mysql> select scale_status from vnf_instantiated_info where id="2c1f7511-5035-4cc7-b3b9-f05290a0eb45";
+--------------+
| scale_status |
+--------------+
| []           |
```

* Expected vnf_instantiated_info information("ETSI NFV-SOL VNF Deployment as VM with LCM operation user data[2]" result)
```
mysql> select scale_status from vnf_instantiated_info;
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| scale_status                                                                                                                                                                                                                                                        |
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| [{"tacker_object.data": {"deleted": false, "aspect_id": "VDU1_scale", "scale_level": 0}, "tacker_object.name": "ScaleInfo", "tacker_object.changes": ["scale_level", "deleted", "aspect_id"], "tacker_object.version": "1.0", "tacker_object.namespace": "tacker"}] |
```

[1]:https://docs.openstack.org/tacker/latest/user/etsi_vnf_deployment_as_vm_with_tosca.html
[2]:https://docs.openstack.org/tacker/latest/user/etsi_vnf_deployment_as_vm_with_user_data.html