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[JK <1378904@xxxxxxxxxxxxxxxxxx>]

CONFIRMED FOR: MITAKA
$ nova-manage --version
13.0.0

# Reproduce Steps:
1) Create a HA/AZ.  ie., "AZ1"
2) Add compute nodes to "AZ1" (Admin->System->Host Aggregates->Manage Hosts)
3) Launch VM in this AZ.
4) Live migrate/migrate VM - will succeed
5) Create a new HA/AZ.  ie., "AZ2"
6) Remove compute nodes from "AZ1"
7) Add compute nodes to "AZ2"
8) Try to migrate VM

Fails with ERROR: Error: No valid host was found. There are not enough
hosts available. compute-1: (AvailabilityZoneFilter) avail zone az1 not
in host AZ: set([u'az2'])

# nova-scheduler.log
2016-11-17 21:08:38.690 168453 INFO nova.filters [req-e9cede77-e888-4553-83d6-4e112a8e44a7 59d4a769c88545acb86f646b2464f4d1 93dd4afc2ddb4bfd88d8b5d13d348998 - - -] AvailabilityZoneFilter: (compute-1) REJECT: avail zone az1 not in host AZ: set([u'az2'])

# nova show <uuid> displays correct AZ for VM
| OS-EXT-AZ:availability_zone          | az2   

# however nova --debug list displays in the RESP BODY:
"OS-EXT-AZ:availability_zone": "az1"

# check the VM in DB, availability_zone is still listed as 'az1' as
well.


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

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https://bugs.launchpad.net/bugs/1378904

Title:
  renaming availability zone doesn't modify host's availability zone

Status in OpenStack Compute (nova):
  New

Bug description:
  Hi,

  After renaming our availability zones via Horizon Dashboard, we
  couldn't migrate any "old" instance anymore, the scheduler returning
  "No valid Host found"...

  After searching, we found in the nova DB `instances` table, the
  "availability_zone" field contains the name of the availability zone,
  instead of the ID ( or maybe it is intentional ;) ).

  So renaming AZ leaves the hosts created prior to this rename orphan
  and the scheduler cannot find any valid host for them...

  Our openstack install is on debian wheezy, with the icehouse
  "official" repository from archive.gplhost.com/debian/, up to date.

  If you need any more infos, I'd be glad to help.

  Cheers

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