Scaling with static ip should be handled properly

1. Create a vnfd with following template file.

tosca_definitions_version: tosca_simple_profile_for_nfv_1_0_0

description: VNF TOSCA template with input parameters

metadata:
  template_name: sample-tosca-vnfd

topology_template:
  inputs:
    image_name:
      type: string
      description: Image Name

    flavor:
      type: string
      description: Flavor Information

    zone:
      type: string
      description: Zone Information

    network:
      type: string
      description: mgmt network

    management:
      type: string
      description: management network

    ip_ad:
      type: string
      description: Ip address

    pkt_in_network:
      type: string
      description: In network

    pkt_out_network:
      type: string
      description: Out network

    vendor:
      type: string
      description: Vendor information

    incr:
      type: string
      description: increment number

    cool_down:
      type: string
      description: cool down seconds

    min_inst:
      type: string
      description: minimum instances

    max_inst:
      type: string
      description: maximum instances

  node_templates:
    VDU1:
      type: tosca.nodes.nfv.VDU.Tacker
      properties:
        image: { get_input: image_name}
        flavor: {get_input: flavor}
        availability_zone: { get_input: zone }
        mgmt_driver: noop
        config: |
          param0: key1
          param1: key2

    CP1:
      type: tosca.nodes.nfv.CP.Tacker
      properties:
        management: { get_input: management }
        anti_spoofing_protection: true
        ip_address: { get_input: ip_ad}
      requirements:
        - virtualLink:
            node: VL1
        - virtualBinding:
            node: VDU1

    CP2:
      type: tosca.nodes.nfv.CP.Tacker
      properties:
        anti_spoofing_protection: false
      requirements:
        - virtualLink:
            node: VL2
        - virtualBinding:
            node: VDU1

    CP3:
      type: tosca.nodes.nfv.CP.Tacker
      properties:
        anti_spoofing_protection: false
      requirements:
        - virtualLink:
            node: VL3
        - virtualBinding:
            node: VDU1

    VL1:
      type: tosca.nodes.nfv.VL
      properties:
        network_name: { get_input: network }
        vendor: {get_input: vendor}

    VL2:
      type: tosca.nodes.nfv.VL
      properties:
        network_name: { get_input: pkt_in_network }
        vendor: {get_input: vendor}

    VL3:
      type: tosca.nodes.nfv.VL
      properties:
        network_name: { get_input: pkt_out_network }
        vendor: {get_input: vendor}

  policies:
    - SP2:
        type: tosca.policy.tacker.Scaling
        properties:
          increment: 1
          cooldown: 60
          min_instances: 1
          max_instances: 3
          default_instances: 1
          targets: [VDU1]

2. Create a vnfd with above template and below param file.
{
 image_name: 'cirros-0.3.4-x86_64-uec',
 flavor: 'm1.tiny',
 zone: 'nova',
 network: 'net_mgmt',
 management: 'true',
 pkt_in_network: 'net0',
 pkt_out_network: 'net1',
 vendor: 'tacker',
 incr: '1',
 cool_down: '60',
 min_inst: '1',
 max_inst: '3',
 ip_ad: '192.168.120.225'

3. When we scale out, scaling should not be allowed or handled properly and VDU1 should not get none ip.

Logs:
vyatta@os-dev-06:/opt/stack/tacker$
vyatta@os-dev-06:/opt/stack/tacker$ tacker vnf-list
+-----------------------+------+-----------------------+-----------------------+--------+-----------------------+------------------------+--------------+
| id | name | description | mgmt_url | status | vim_id | placement_attr | error_reason |
+-----------------------+------+-----------------------+-----------------------+--------+-----------------------+------------------------+--------------+
| 4e41310f-2f39-4875 | vnf2 | VNF TOSCA template | {"VDU1": | ACTIVE | 1acba1d4-69c7-406b-88 | {u'vim_name': u'VIM0'} | |
| -a54e-1f49a099f545 | | with input parameters | ["192.168.120.225"]} | | 09-0f60f197bbc5 | | |
+-----------------------+------+-----------------------+-----------------------+--------+-----------------------+------------------------+--------------+
vyatta@os-dev-06:/opt/stack/tacker$
vyatta@os-dev-06:/opt/stack/tacker$ tacker vnf-scale --vnf-id 4e41310f-2f39-4875-a54e-1f49a099f545 --scaling-policy-name SP2 --scaling-type out

vyatta@os-dev-06:/opt/stack/tacker$ tacker vnf-list
+--------------------+------+--------------------+--------------------+-------------------+--------------------+------------------------+--------------+
| id | name | description | mgmt_url | status | vim_id | placement_attr | error_reason |
+--------------------+------+--------------------+--------------------+-------------------+--------------------+------------------------+--------------+
| 4e41310f-2f39-4875 | vnf2 | VNF TOSCA template | {"VDU1": ["192.168 | PENDING_SCALE_OUT | 1acba1d4-69c7-406b | {u'vim_name': u'VIM0'} | |
| -a54e-1f49a099f545 | | with input | .120.225"]} | | -8809-0f60f197bbc5 | | |
| | | parameters | | | | | |
+--------------------+------+--------------------+--------------------+-------------------+--------------------+------------------------+--------------+
vyatta@os-dev-06:/opt/stack/tacker$ tacker vnf-list
+-----------------------+------+-----------------------+-----------------------+--------+-----------------------+------------------------+--------------+
| id | name | description | mgmt_url | status | vim_id | placement_attr | error_reason |
+-----------------------+------+-----------------------+-----------------------+--------+-----------------------+------------------------+--------------+
| 4e41310f-2f39-4875 | vnf2 | VNF TOSCA template | {"VDU1": [null, | ACTIVE | 1acba1d4-69c7-406b-88 | {u'vim_name': u'VIM0'} | |
| -a54e-1f49a099f545 | | with input parameters | "192.168.120.225"]} | | 09-0f60f197bbc5 | | |
+-----------------------+------+-----------------------+-----------------------+--------+-----------------------+------------------------+--------------+
vyatta@os-dev-06:/opt/stack/tacker$
vyatta@os-dev-06:/opt/stack/tacker$

}