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[wanghaojue <1907775@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Description
===========

After change Host's Availability Zone, the deployed VMs Availability
Zone data(in request_specs table) can not be updated

Steps to reproduce
==================
1.Create host aggregates block_az, add two hosts into this host aggregates, also set availability_zone to block_az.
2.Deploy a VM, named: rhel82-official-block-az
3.Now remove 2 hosts from block_az host aggregates, these 2 hosts are in "Default_Group" AZ
4. openstack server show rhel82-official-block-az, the availability_zone is correct
+-------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------+
| Field                               | Value                                                                                                                                |
+-------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------+
| OS-DCF:diskConfig                   | MANUAL                                                                                                                               |
| OS-EXT-AZ:availability_zone         | Default_Group                                                                                                                        |
| OS-EXT-SRV-ATTR:host                | kvmperf2.icic.boe                                                                                                                    |
| OS-EXT-SRV-ATTR:hostname            | rhel82-official-block-az                                                                                                             |
| OS-EXT-SRV-ATTR:hypervisor_hostname | kvmperf2.icic.boe

5.From novaapi.request_specs table, the AZ is still the original
"block_az" and is incorrect.

MariaDB [novaapi]> select * from request_specs where instance_uuid
='5f4c292b-30b4-4bce-b204-5304306248cb';

 "availability_zone": "block_az", "flavor": .....


Expected result
===============
 "availability_zone" in novaapi.request_specs table can be updated when vm's host is changed.

Actual result
=============
 "availability_zone" in novaapi.request_specs table is updated when vm's host is changed.

Environment
===========
Ussuri release

** Affects: nova
     Importance: Undecided
         Status: New

** Summary changed:

- After change Host's Availability Zone, the deployed VMs Availability Zone data(in request_specs table) can not be updated
+ After change Host's Availability Zone, the deployed VMs Availability Zone data(in novaapi.request_specs table) can not be updated

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https://bugs.launchpad.net/bugs/1907775

Title:
  After change Host's Availability Zone, the deployed VMs Availability
  Zone data(in novaapi.request_specs table) can not be updated

Status in OpenStack Compute (nova):
  New

Bug description:
  Description
  ===========

  After change Host's Availability Zone, the deployed VMs Availability
  Zone data(in request_specs table) can not be updated

  Steps to reproduce
  ==================
  1.Create host aggregates block_az, add two hosts into this host aggregates, also set availability_zone to block_az.
  2.Deploy a VM, named: rhel82-official-block-az
  3.Now remove 2 hosts from block_az host aggregates, these 2 hosts are in "Default_Group" AZ
  4. openstack server show rhel82-official-block-az, the availability_zone is correct
  +-------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------+
  | Field                               | Value                                                                                                                                |
  +-------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------+
  | OS-DCF:diskConfig                   | MANUAL                                                                                                                               |
  | OS-EXT-AZ:availability_zone         | Default_Group                                                                                                                        |
  | OS-EXT-SRV-ATTR:host                | kvmperf2.icic.boe                                                                                                                    |
  | OS-EXT-SRV-ATTR:hostname            | rhel82-official-block-az                                                                                                             |
  | OS-EXT-SRV-ATTR:hypervisor_hostname | kvmperf2.icic.boe

  5.From novaapi.request_specs table, the AZ is still the original
  "block_az" and is incorrect.

  MariaDB [novaapi]> select * from request_specs where instance_uuid
  ='5f4c292b-30b4-4bce-b204-5304306248cb';

   "availability_zone": "block_az", "flavor": .....


  Expected result
  ===============
   "availability_zone" in novaapi.request_specs table can be updated when vm's host is changed.

  Actual result
  =============
   "availability_zone" in novaapi.request_specs table is updated when vm's host is changed.

  Environment
  ===========
  Ussuri release

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