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[Balazs Gibizer <balazs.gibizer@xxxxxxxx>]

Public bug reported:


As a non admin:

* Create a server with a qos port. 
* Resize the server to another flavor. 

=> Server goes to ERROR state and the following is logged in the nova-
compute log on the destination host

Oct 24 14:33:42 aio nova-compute[10293]: ERROR oslo_messaging.rpc.server
PortUpdateFailed: Port update failed for port b1593c18-b088-4d5c-
b3c6-bdd5348f3b52: Provider mappings are not available to the compute
service but are required for ports with a resource request.


Triage:

Similarly to bug 1849657 Nova uses a non admin Neutron client to query
the ports[1] at the start of the resize. The the resize operation is not
called by an admin user then the resource_request field of the Neutron
is not filled. This causes that Nova does allocate resources and does
not create port - rp mapping for the qos ports on the destination node.
But when the qos port is being updated on the destination host [2] nova
uses an admin client and therefore sees the resource_request of the qos
ports. As the port - rp mapping is missing for these ports the resize
fails.


[1] https://github.com/openstack/nova/blob/1bfa4626d13d0a73e63745cc4a864ae86d490daf/nova/network/neutronv2/api.py#L2228
[2] https://github.com/openstack/nova/blob/1bfa4626d13d0a73e63745cc4a864ae86d490daf/nova/network/neutronv2/api.py#L3305

** Affects: nova
     Importance: High
     Assignee: Balazs Gibizer (balazs-gibizer)
         Status: In Progress


** Tags: neutron resize

** Tags added: neutron resize

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

** Changed in: nova
     Assignee: (unassigned) => Balazs Gibizer (balazs-gibizer)

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

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https://bugs.launchpad.net/bugs/1849695

Title:
  resize of server with qos ports fails if called by non admin user

Status in OpenStack Compute (nova):
  In Progress

Bug description:
  
  As a non admin:

  * Create a server with a qos port. 
  * Resize the server to another flavor. 

  => Server goes to ERROR state and the following is logged in the nova-
  compute log on the destination host

  Oct 24 14:33:42 aio nova-compute[10293]: ERROR
  oslo_messaging.rpc.server PortUpdateFailed: Port update failed for
  port b1593c18-b088-4d5c-b3c6-bdd5348f3b52: Provider mappings are not
  available to the compute service but are required for ports with a
  resource request.

  
  Triage:

  Similarly to bug 1849657 Nova uses a non admin Neutron client to query
  the ports[1] at the start of the resize. The the resize operation is
  not called by an admin user then the resource_request field of the
  Neutron is not filled. This causes that Nova does allocate resources
  and does not create port - rp mapping for the qos ports on the
  destination node. But when the qos port is being updated on the
  destination host [2] nova uses an admin client and therefore sees the
  resource_request of the qos ports. As the port - rp mapping is missing
  for these ports the resize fails.

  
  [1] https://github.com/openstack/nova/blob/1bfa4626d13d0a73e63745cc4a864ae86d490daf/nova/network/neutronv2/api.py#L2228
  [2] https://github.com/openstack/nova/blob/1bfa4626d13d0a73e63745cc4a864ae86d490daf/nova/network/neutronv2/api.py#L3305

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