development-proposals/gap-analysis/proposed/capacity-management.rst

Capacity Management Gap and Overlap Analysis

Sections in italics are optional.

Quotas, Usage Plans, and Capacity Management

Primary contact

• Hiroaki Kobayashi (NTT, IRC: hiro-kobayashi),
• Bertrand Souville (DOCOMO Euro-Labs, IRC: bertys)
• Masahito Muroi (NTT, Blazar PTL, IRC: masahito)

Gap analysis

• CRM001 As Wei the project owner of a Telco operator, I want to specify my resource usage request (RUR) in a way that will enable automated processing by the CSP, so that my RUR will be handled more quickly and accurately.
  • TBD
• CRM002 As Adrian the infrastructure architect, I want to be able to automate the processing of RURs so that I can meet my user SLAs and gain more timely and accurate data input to my capacity management and planning systems.
  • TBD
• CRM003 As Wei, I want to be able to describe the temporal characteristics of my RUR, so that the CSP can plan capacity more accurately and reduce the chances of a resource request failure. My CSP may also offer me better pricing for more accurate usage prediction. Some examples of time-based RURs:

  • a. I plan to use up to 60 vCPUs and 240 GB of RAM from 6/1/2018 to 8/14/2018.

    * This operation is planned to be supported by Blazar.

    • [blueprint] [Blazar] New instance reservation feature

    https://blueprints.launchpad.net/blazar/+spec/new-instance-reservation

  • b. I plan to use 200GB of object storage starting on 8/14/2016, increasing by 100GB every calendar month thereafter.

    • TBD

  • c. I want guaranteed access to 30 vCPUs and 200GB of RAM for my project. In addition, during October-December, I want to be able to increase my usage to 150 vCPUs and 1TB of RAM.

    • Blazar guarantees access for the requested resource if there is enough capacity at the time of RUR.
    • It is not possible to increase resource capacity.
      • [blueprint] [Blazar] Update reserved resource capacity https://blueprints.launchpad.net/blazar/+spec/update-reserved-capacity

  • d. I want guaranteed access to 4 instances with 1 vCPU and 1GB of RAM and 10GB of disk and a guaranteed minimum bandwidth of 1Gbps between the instances. This example is similar to what would be described in the VNFD.

    * A instance reservation feature used to be supported by Blazar. However,

    it is not available in current release because it depends on Nova API extensions - v2 of which was deprecated in Liberty and the API extension itself was completely removed in Ocata. Alternatively, There is a new instance reservatin blueprint in Blazar.

    • [spec] [Nova] Support nested resource providers https://blueprints.launchpad.net/nova/+spec/nested-resource-providers
    • [spec] [Nova] Remove support for API extensions https://specs.openstack.org/openstack/nova-specs/specs/newton/implemented/api-no-more-extensions.html
    • [blueprint] [Blazar] Get the instance reservation feature back

    https://blueprints.launchpad.net/blazar/+spec/new-instance-reservation

    • Network bandwidth between instances cannot be guaranteed for now.
      • [bug] [Neutron] Minimum bandwidth support (egress) https://bugs.launchpad.net/neutron/+bug/1560963
      • [bug] [Neutron] Strict minimum bandwidth support (egress) https://bugs.launchpad.net/neutron/+bug/1578989
      • [blueprint] [Blazar] Implement Basic network plugin for network resources management https://blueprints.launchpad.net/blazar/+spec/basic-network-plugin
• CRM004 As Wei, I want to be able to submit an updated version of a rolling RUR for my project every month, so that my CSP has accurate information and can give me the best price and SLA.
  • TBD
• CRM005 As Wei, I want to be able to take advantage of pricing and other offers from my CSP in order to meet the business objectives for my project. For example:
  1. I want 60 vCPUs for a minimum of one hour. After that time, the CSP may shut down all my instances if the resources are needed elsewhere. (I assume that the price is lower on such instances.)
     • TBD
  2. I want up to 100 vCPUs for the next 24 hours. Tell me how many I can have.
     • TBD
• CRM006 As Adrian, I want to be able to automate the construction and interpretation of a time-based resource usage plan so that I can schedule the most cost-effective actions to maintain my SLA. Some examples of actions:
  1. Schedule the provisioning of additional infrastructure.
     • TBD
  2. Repurpose existing allocated infrastructure.
     • TBD
  3. Assign a new project to one of a number of regions based on usage projections.
     • TBD
  4. Add “burst capacity” from a federation partner or reseller.
     • TBD
  5. Modify or defer another project.
     • TBD
• CRM007 As Wei, I want to be able to query/update/terminate a RUR at any point in time.
  • Blazar allows RUR to be queried at any point of time.
  • Blazar allows only start/end time of RUR to be updated for now
    • [blueprint] [Blazar] Update reserved resource capacity https://blueprints.launchpad.net/blazar/+spec/update-reserved-capacity
  • Blazar does not allow RUR to be terminated on demand after start time of the RUR.
    • [blueprint] [Blazar] Terminate lease at any time https://blueprints.launchpad.net/blazar/+spec/terminate-lease-at-anytime
• CRM008 As Wei, I want to receive an appropriate error message in case the a RUR is not successful. In case of a failure of RUR I want the environment to be reverted back to pre-RUR state. In other words, RUR transaction should be Atomic. In case of RUR failure, the error message should contain sufficient information such that user can take actions to modify the RUR.
  • Blazar plans to support atomic transactions.
    • [blueprint] [Blazar] Support atomic transactions https://blueprints.launchpad.net/blazar/+spec/atomic-transaction
  • In case of a failure of RUR, information about the cause of error is contained in the response messages from Blazar.