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apmec/doc/source/reference/block_storage_usage_guide.rst
Tung Doan 6f5e1d7338 Update APMEC code
2018-05-07 13:25:56 +02:00

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Orchestrating MEAs with attached Volumes

To support persistent volumes to MEA, TOSCA MEC profile supports new type of nodes. Apmec 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 Apmec.

MEAD 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 MEAD:

VB1:
  type: tosca.nodes.BlockStorage.Apmec
  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 MEAD looks like below:

tosca_definitions_version: tosca_simple_profile_for_mec_1_0_0
description: Demo example

metadata:
  template_name: sample-tosca-mead

topology_template:
  node_templates:
    VDU1:
      type: tosca.nodes.mec.VDU.Apmec
      capabilities:
        mec_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.mec.CP.Apmec
      properties:
        management: true
        order: 0
        anti_spoofing_protection: false
      requirements:
        - virtualLink:
            node: VL1
        - virtualBinding:
            node: VDU1

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

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

    VL1:
      type: tosca.nodes.mec.VL
      properties:
        network_name: net_mgmt
        vendor: Apmec