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[Bug 1861442] Re: QOS minimum bandwidth rejection of non-physnet network and updates should be driver specific

 

Reviewed:  https://review.opendev.org/705695
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=321afc8f897c8132ddc6edd2b59285111d0d73e0
Submitter: Zuul
Branch:    master

commit 321afc8f897c8132ddc6edd2b59285111d0d73e0
Author: Bence Romsics <bence.romsics@xxxxxxxxx>
Date:   Tue Feb 4 14:02:30 2020 +0100

    Move rejection of min-bw rule on non-physnet port to the ovs qos driver
    
    The ovs qos driver only supports the min-bw rule on physnet ports.
    However other (future) qos drivers may support the min-bw rule on
    non-physnet ports too, therefore implementing the rejection of the
    unsupported combination in the qos plugin was a bug.
    
    This change moves the rejection from the qos plugin to the ovs qos
    driver.
    
    Change-Id: I02d77a03c411dc8ab303a7d7b53d7ea93cc9f4c6
    Closes-Bug: #1861442
    Depends-On: https://review.opendev.org/705694
    Related-Bug: #1819029


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1861442

Title:
  QOS minimum bandwidth rejection of non-physnet network and updates
  should be driver specific

Status in neutron:
  Fix Released

Bug description:
  When adding a qos policy to a network or port, there is the following check in the qos_plugin:
              # minimum-bandwidth rule is only supported (independently of
              # drivers) on networks whose first segment is backed by a physnet
              if rule.rule_type == qos_consts.RULE_TYPE_MINIMUM_BANDWIDTH:
                  net = network_object.Network.get_object(
                      context, id=port.network_id)
                  physnet = net.segments[0].physical_network
                  if physnet is None:
                      raise qos_exc.QosRuleNotSupported(rule_type=rule.rule_type,
                                                        port_id=port['id'])
  To my knowledge this statement is simply untrue as it is precisly the reference drivers which have this problem, not necessarily all drivers. This blocks me from creating a qos_driver that does support mimimum bandwidth without a physnet.
  The same goes for min_bw_rule_updates when the port is bound.

  I propose we move those checks to the qos_drivers themselves.

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References