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[Gary Kotton <1515311@xxxxxxxxxxxxxxxxxx>]

** Also affects: nova
   Importance: Undecided
       Status: New

** Changed in: nova
       Status: New => Confirmed

** Changed in: nova
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1515311

Title:
  Instance scheduling based on Neutron properties

Status in neutron:
  New
Status in OpenStack Compute (nova):
  Confirmed

Bug description:
  Add support to allow nova scheduler place instances along available
  neutron properties.

  Use case: 
  - Scheduling along physical network: A certain network (e.g. your fast 100Gbit network) is only available to a subset of the nodes (e.g. per rack).
  - Schedulding along QoS attributes: Schedule instances along available bandwidth

  Proposal:
  Integration might be challenging, as also nova needs to be enhanced with a new filter. Ihar talked to nova folks (Nikola Dipanov, Jay Pipes, Sylvain) but they seemed not to be interested in fulfilling this need right now. However they have a vague idea of a scheduler hook to influence scheduling decisions.

  Alternative to nova scheduler hook:
  Today scheduling decision is made on resource data reported from nova-cpu to nova scheduler via the message bus. What would be required is a similar reporting from neutron-agent to nova-scheduler. However such a private path might be against the decoupling of nova and neutron, introduce new message topics and so on. 

  
  Note: This bug is intended to track all information from Neutron side. It's not meant as a requirement against nova.

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