Orchestrating VNFs with attached Volumes¶

To support persistent volumes to VNF, the TOSCA NFV profile supports a new type of nodes. Tacker has now the feature of parsing of those new nodes and creation of cinder volumes which are attached to the VDUs.

Prerequisites¶

To have persistent volume support to VDUs, we must enable cinder service in addition to the other services needed by Tacker.

VNFD Changes¶

There are two steps to have volume attached to VDU:

Create volume or Use an existing volume.
Attach Volume to VDU

Create Volume¶

To add volume, we need to add the below node to the VNFD:

VB1:
  type: tosca.nodes.BlockStorage.Tacker
  properties:
    size: 1 GB

Use Existing Volume¶

We can also attach an already created/existing volume with VNF by providing volume_id in input.

topology_template:
  inputs:
    my_vol:
      description: volume id
      type: string

  VB1:
    type: tosca.nodes.BlockStorage.Tacker
    properties:
      volume_id: my_vol

Attach volume to VDU¶

Next attach the created volume to VDU as below:

CB1:
  type: tosca.nodes.BlockStorageAttachment
  properties:
    location: /dev/vdb
    requirements:
      - virtualBinding:
          node: VDU1
      - virtualAttachment:
          node: VB1

With these additions, the new VNFD looks like below:

tosca_definitions_version: tosca_simple_profile_for_nfv_1_0_0
description: Demo example

metadata:
  template_name: sample-tosca-vnfd

topology_template:
  node_templates:
    VDU1:
      type: tosca.nodes.nfv.VDU.Tacker
      capabilities:
        nfv_compute:
          properties:
            num_cpus: 1
            mem_size: 512 MB
            disk_size: 1 GB
      properties:
        image: cirros-0.5.2-x86_64-disk
        availability_zone: nova
        mgmt_driver: noop
        config: |
          param0: key1
          param1: key2

    CP1:
      type: tosca.nodes.nfv.CP.Tacker
      properties:
        management: true
        order: 0
        anti_spoofing_protection: false
      requirements:
        - virtualLink:
            node: VL1
        - virtualBinding:
            node: VDU1

    VB1:
      type: tosca.nodes.BlockStorage.Tacker
      properties:
        size: 1 GB

    CB1:
      type: tosca.nodes.BlockStorageAttachment
      properties:
        location: /dev/vdb
      requirements:
        - virtualBinding:
            node: VDU1
        - virtualAttachment:
            node: VB1

    VL1:
      type: tosca.nodes.nfv.VL
      properties:
        network_name: net_mgmt
        vendor: Tacker

Orchestrating VNFs with attached Volumes