Case 1:
1) Install master.
2) Install plugin (attached)
3) Modify /var/www/nailgun/plugins/vip_plugin-1.0/network_roles.yaml file:
- id: "public/vip"
  # Role mapping to network
  properties:
    # List of VIPs to be allocated
    vip:
         # Unique VIP name
       - name: "super_vip_name"
         # Optional linux namespace for VIP
         namespace: "haproxy"
4) Create a cluster and enable plugin.
5) Add one (for example) node with controller role
6) Deploy env for netconfig stage for example:
     fuel node --node 1 --end netconfig
7) Navigate to the node-1 and check /etc/hiera/astute.yaml

Actual result:
New vip resource is created:
root@node-1:~# pcs resource show vip__super_vip_name
 Resource: vip__super_vip_name (class=ocf provider=fuel type=ns_IPaddr2)
  Attributes: bridge=br-ex base_veth=v_super_vi_a610 ns_veth=b_super_vi_a610 ip=10.109.1.4 iflabel=ka cidr_netmask=24 ns=haproxy gateway_metric=10 gateway=10.109.1.1 
  Meta Attrs: migration-threshold=3 failure-timeout=60 resource-stickiness=1 
  Operations: monitor interval=5 timeout=20 (vip__super_vip_name-monitor-5)
              start interval=0 timeout=30 (vip__super_vip_name-start-0)
              stop interval=0 timeout=30 (vip__super_vip_name-stop-0)

root@node-1:~# ip netns exec haproxy ip -4 -o a| grep super
25: b_super_vi_a610    inet 10.109.1.4/24 scope global b_super_vi_a610\       valid_lft forever preferred_lft forever

New network role is not created.

Case 2:
1) Install master.
2) Install plugin (attached)
3) Modify /var/www/nailgun/plugins/vip_plugin-1.0/network_roles.yaml file:
- id: "public/vip"
  default_mapping: "public"
  properties:
    subnet: true
    gateway: false
    vip:
       - name: "super_vip_name"
         namespace: "haproxy"
4) Create a cluster and enable plugin.
5) Add one (for example) node with controller role
6) Deploy env for netconfig stage for example:
     fuel node --node 1 --end netconfig
7) Navigate to the node-1 and check /etc/hiera/astute.yaml

Result:
Deploy is failed. Because we try override subnet and gateway with values from network_roles.yaml.

2015-11-23T17:06:25 debug: [613] Process message from worker queue:
"null"
2015-11-23T17:06:26 debug: [613] Got message with payload
"null"
2015-11-23T17:06:26 err: [613] Error on sending message 'task in orchestrator': undefined method `[]' for nil:NilClass

Case 3:
1) Install master.
2) Install plugin (attached)
3) Modify /var/www/nailgun/plugins/vip_plugin-1.0/network_roles.yaml file:
- id: "public/vip2"
  # Role mapping to network
  default_mapping: "public"
  properties:
    # Should be true if network role requires subnet being set
    subnet: true
    # Should be true if network role requires gateway being set
    gateway: false
    # List of VIPs to be allocated
    vip:
         # Unique VIP name
       - name: "super_vip_name"
         # Optional linux namespace for VIP
         namespace: "haproxy"
4) Create a cluster and enable plugin.
5) Add one (for example) node with controller role
6) Deploy env for netconfig stage for example:
     fuel node --node 1 --end netconfig
7) Navigate to the node-1 and check /etc/hiera/astute.yaml

Actual result:
There is a new vip at new network role public/vip2 under the same subnet as public/vip network role:

Section with vips contains the new one vip.

root@node-1:~# grep "vip" /etc/hiera/astute.yaml 
        public/vip: 10.109.1.4
        public/vip2: 10.109.1.4
        mgmt/vip: 10.109.2.3
  vips:
      network_role: public/vip
      network_role: mgmt/vip
      network_role: public/vip
      network_role: mgmt/vip
    super_vip_name:
      network_role: public/vip2
    public/vip: br-ex
    public/vip2: br-ex
    mgmt/vip: br-mgmt
vip_plugin:
  vip_plugin_text: Set default value
    label: Title for vip_plugin plugin

root@node-1:~# grep "super_vip" /etc/hiera/astute.yaml -A6
    super_vip_name:
      network_role: public/vip2
      node_roles:
      - controller
      - primary-controller
      namespace: haproxy
      ipaddr: 10.109.1.5

Fuel used:
release_versions:
  2015.1.0-8.0:
    VERSION:
      api: '1.0'
      astute_sha: 959b06c5ef8143125efd1727d350c050a922eb12
      build_id: '166'
      build_number: '166'
      feature_groups:
      - mirantis
      fuel-agent_sha: 2750600e946e96701099dfef5a7d69017f2e9956
      fuel-createmirror_sha: e34a0dd080fe6c133bcc75a00c31b27934ba51bc
      fuel-library_sha: 0d210dc3851ac6c74b3914ef4df0139defc8d117
      fuel-nailgun-agent_sha: 3e9d17211d65c80bf97c8d83979979f6c7feb687
      fuel-nailgun_sha: a5f4c44d08715f3be6b200a69032b30d347ac911
      fuel-ostf_sha: 9690a2de829d3b063ed1e64b0b10dde39f711dc0
      fuel-upgrade_sha: 1e894e26d4e1423a9b0d66abd6a79505f4175ff6
      fuelmain_sha: 266f9b374934c64629a84b5146632cc0de70ac91
      fuelmenu_sha: 06bbcebed6c8d0b0f9279e2997d2f958c800e98c
      network-checker_sha: a57e1d69acb5e765eb22cab0251c589cd76f51da
      openstack_version: 2015.1.0-8.0
      production: docker
      python-fuelclient_sha: e685d68c1c0d0fa0491a250f07d9c3a8d0f9608c
      release: '8.0'
      shotgun_sha: 25dd78a3118267e3616df0727ce746e7dead2d67
shotgun_sha: 25dd78a3118267e3616df0727ce746e7dead2d67