OASIS Topology and Orchestration Specification for Cloud Applications (TOSCA) TC

 View Only
Back to discussions
Expand all | Collapse all

Re: [tosca] Artifact property assingments

  • 1.  Re: [tosca] Artifact property assingments

    Posted 02-09-2021 16:24




    Hi Denes,
     
    We discussed today in the WG the artifact property question below. The consensus is that only properties defined in the artifact type shall be assigned, and the example is wrong.
     
    Actually in TOSCA v1.3 there in the Property assignment description in section 3.6.11.2.1 it stated that:

    property_name : represents the name of a property that would be used to select a property definition with the same name within on a TOSCA entity (e.g., Node Template, Relationship Template, etc.,)
    which is declared in its declared type (e.g., a Node Type, Node Template, Capability Type, etc.)
     
    Best regards,
    /Calin
     
     

    From: <tosca@lists.oasis-open.org> on behalf of "Nemeth, Denes (Nokia - HU/Budapest)" <denes.nemeth@nokia.com>
    Date: Tuesday, 26 January 2021 at 09:37
    To: "tosca@lists.oasis-open.org" <tosca@lists.oasis-open.org>
    Subject: [tosca] Artifact property assingments


     

    Dear Tosca Community
     
    Can you help us to clarify artifact property assignments in the Tosca specs 1.3 / 2.0 draft.
     
    In both places the spec states that:




    p roperties


    no


    map of  
    property
    assignments


    The optional map of property assignments associated with the artifact.




     
    It gives the following example
     

    artifacts:

      sw_image:

        description: Image for virtual machine

        type: tosca.artifacts.Deployment.Image.VM

       
    file: http://10.10.86.141/images/Juniper_vSRX_15.1x49_D80_preconfigured.qcow2

        checksum: ba411cafee2f0f702572369da0b765e2

        version: 3.2

        checksum_algorithm: MD5

       
    properties:

          name: vSRX

          container_format: BARE

           disk_format: QCOW2

          min_disk: 1 GB

           size: 649 MB
     
    however
     

    tosca.artifacts.Deployment:

      derived_from:  tosca.artifacts.Root

      description: TOSCA base type for deployment artifacts

    tosca.artifacts.Deployment.Image:

      derived_from:  tosca.artifacts.Deployment

    tosca.artifacts.Deployment.Image.VM:

      derived_from:  tosca.artifacts.Deployment.Image

      description: Virtual Machine (VM) Image
    #no property definitions (or in any of the parents)
     
    So the question would be is it allowed to assign properties that have not been defined.
     
    Maybe it would be nice to add one of the following statements in the 2.0 specs.

    Only defined properties shall be assigned. (& fix example) Even non defined properties may be assigned
     
    Cheers Denes






Related Content