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[OpenStack Infra <1757207@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/604495
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=3e902313e9c3117e76d6adf88a2f104bc229374c
Submitter: Zuul
Branch:    master

commit 3e902313e9c3117e76d6adf88a2f104bc229374c
Author: imacdonn <iain.macdonnell@xxxxxxxxxx>
Date:   Sat Sep 22 00:55:36 2018 +0000

    nova-status - don't count deleted compute_nodes
    
    When counting rows in the compute_nodes table to compare against
    resource records, those which have been marked as deleted should
    not be counted, otherwise the result is artificially high.
    
    Change-Id: Ia3fbb9c46c15826fc363286ce48984f59cbe1e62
    Closes-Bug: #1757207


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

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https://bugs.launchpad.net/bugs/1757207

Title:
  compute resource providers not equal to compute nodes in deployment

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) pike series:
  Confirmed
Status in OpenStack Compute (nova) queens series:
  Confirmed
Status in OpenStack Compute (nova) rocky series:
  Confirmed

Bug description:
  Description
  ===========
  When I execute the command `nova-status upgrade check`,
  output:

  nova-status upgrade check
  +----------------------------------------------------------------------+
  | Upgrade Check Results |
  +----------------------------------------------------------------------+
  | Check: Cells v2 |
  | Result: Success |
  | Details: None |
  +----------------------------------------------------------------------+
  | Check: Placement API |
  | Result: Success |
  | Details: None |
  +----------------------------------------------------------------------+
  | Check: Resource Providers |
  | Result: Warning |
  | Details: There are 4 compute resource providers and 15 compute nodes |
  | in the deployment. Ideally the number of compute resource |
  | providers should equal the number of enabled compute nodes |
  | otherwise the cloud may be underutilized. See |
  | http://docs.openstack.org/developer/nova/placement.html |
  | for more details. |
  +----------------------------------------------------------------------+

  Steps to reproduce
  ==================
  How to replicate this?
  Remove the hosts from the openstack controller:
  nova hypervisor-list
  nova service-delete {id}

  Then run:
  su -s /bin/sh -c "nova-manage cell_v2 discover_hosts --verbose" nova
  The deleted compute node will be added again as a new node.
  run:
  nova-status upgrade check

  Expected result
  ===============
  No warning when you run:
  nova-status upgrade check

  Actual result
  =============
  You can find the warning.
  This causes issue with placement of new VM's.
  The compute host which was deleted and added again will not be considered during VM scheduling and placement.

  Environment
  ===========
  OpenStack Pike release
  Neutron Networking which is default.

  Logs and Configs
  ================
  Config as the Openstack documentation.

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