Orchestrating VNFs with attached Volumes

updated: 2019-04-10 00:59

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

updated: 2019-04-10 00:59

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