Option to Enable/Disable Cinder Volume Recreation in v1 Heal

https://blueprints.launchpad.net/tacker/+spec/v1-heal-cinder-volume

This specification proposes adding an option to enable or disable Cinder volume recreation when issuing a v1 Heal request.

Problem description

The current v1 Heal request always recreates the specified VNFC instance along with its related Cinder storage resources, which is not flexible for users who want to keep their storage data. The v2 Heal request already provides an option to control this behavior.

Proposed change

The existing additionalParams field in the v1 Heal request will be extended to include a new parameter that allows users to choose whether to recreate the Cinder storage resources.

To achieve this, two new parameters will be added under [vnf_lcm] in tacker.conf. If neither parameter is defined, the existing behavior will remain unchanged.

heal_vnfc_block_storage sets the default behavior. If the Heal request does not specify it, this value is used.

heal_include_block_storage_key sets the parameter name that can be used in the additionalParams field of the Heal request. This allows users to align the request format with v2 or choose a different name if preferred. (Setting this to “all” will match the v2 request format. [1] )

By configuring these two parameters, users can flexibly adjust the behavior to suit their operational requirements.

Example of tacker.conf:

[vnf_lcm]
heal_vnfc_block_storage = false
heal_include_block_storage_key = heal_include_storage  # customized name

In this case, Example of Heal request with tacker-cli and additional-param:

openstack vnflcm heal --vnfc-instance <vnfc_id> --additional-param-file <file_path> -- <vnflcm_id>

{
  "additionalParams":
    {
      "heal_include_storage": true
    }
}

In this case, the storage will only be recreated if explicitly specified in the Heal request. This means it is suitable for environments where most users prefer to keep their storage data during a heal operation.

Alternatives

None

Data model impact

None

REST API impact

None

Security impact

None

Notifications impact

None

Other end user impact

None

Performance Impact

None

Other deployer impact

None

Developer impact

None

Upgrade impact

None

Implementation

Assignee(s)

Primary assignee:

Hitomi Koba <hi-koba@kddi.com>

Work Items

  • Consider making heal_include_block_storage_key configurable, based on ETSI-NFV direction (under discussion).

  • Update Docs (Documentation Impact).

  • Update OpenStack Driver (tacker/nfvo/drivers/vim/openstack_driver.py) to check the heal_vnfc_block_storage and heal_include_block_storage_key config value and branch logic accordingly.

  • Modify other related parts as needed.

Dependencies

None

Testing

Add unit tests.

Documentation Impact

  • Configuration Options [2]

  • ETSI NFV-SOL VNF Healing (v1) [3]

  • NFV Orchestration API Reference (v1) [4]

  • Command-Line Interface Reference (v1) [5]

References