tacker/doc/source/devref/block_storage_usage_guide.rst

Orchestrating VNFs with attached Volumes

To support persistent volumes to VNF, TOSCA NFV profile supports new type of nodes. Tacker has now 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 that needed by Tacker.

VNFD Changes

There are two steps to have volume attached to VDU:

• Create 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

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-0.3.5-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