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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

This was regressed in Stein with change
https://review.openstack.org/#/c/603844/.

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

** Tags added: compute ironic neutron

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

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

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

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https://bugs.launchpad.net/bugs/1822801

Title:
  Baremetal port's host_id get updated during instance restart

Status in OpenStack Compute (nova):
  In Progress
Status in OpenStack Compute (nova) stein series:
  Confirmed

Bug description:
  In case of baremetal overcloud, the instance ports gets updated during instance reboot[1] to change host_id
  to be the nova compute host_id.

  This way baremetal ports' host_id will be changed to indicate the nova
  host_id instead of ironic node uuid.

  In case of normal instance or even baremetal instance it wouldn't be a problem but in case of SmartNIC
  baremetal instance the port's host_id is important to communicate with the relevant Neutron agent running on the SmartNIC as the port's host_id contains the SmartNIC host name.

  
  Reproduce:
  - deploy baremetal overcloud 
  - create baremetal instance
  - after creation complete, check port details and notice binding_host_id=overcloud-controller-0.localdomain

  
  [1] https://github.com/openstack/nova/blob/master/nova/compute/manager.py#L7191

  
  Nova version:
  ()[root@overcloud-controller-0 /]# rpm -qa | grep nova
  puppet-nova-14.4.1-0.20190322112825.740f45a.el7.noarch
  python2-nova-19.0.0-0.20190322140639.d7c8924.el7.noarch
  python2-novajoin-1.1.2-0.20190322123935.e8b18c4.el7.noarch
  openstack-nova-compute-19.0.0-0.20190322140639.d7c8924.el7.noarch
  python2-novaclient-13.0.0-0.20190311121537.62bf880.el7.noarch
  openstack-nova-common-19.0.0-0.20190322140639.d7c8924.el7.noarch

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