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[OpenStack Infra <1720130@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/510844
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=eaa3023502d84502059573e492dac1aa39877207
Submitter: Zuul
Branch:    master

commit eaa3023502d84502059573e492dac1aa39877207
Author: Surya Seetharaman <suryaseetharaman.9@xxxxxxxxx>
Date:   Tue Oct 10 11:40:06 2017 +0200

    nova-manage map_instances is not using the cells info from the API database
    
    In order to map instances, nova-manage takes the database info of the cell from
    the config file (so by default this points to cell0 in nova.conf) and so for
    every new cell created, in order to do the map_instances, the correct --config-file
    has to be specified in addition to the --cell_uuid option that is provided.
    
    So it is better if this info is taken from the cell_mappings table inside the
    nova-api database using the provided --cell_uuid.
    
    Change-Id: Ib86e25bf8c4cd4008eae43c49c74f24b1b63518a
    Closes-Bug: #1720130


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

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https://bugs.launchpad.net/bugs/1720130

Title:
  nova-manage map_instances is not using the cells info from the API
  database

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  In order to map instances, nova-manage takes the DB info of the cells
  from the config file (so by default this points to cell0 in nova.conf)
  and so for every new cell created, in order to do the map_instances,
  the correct config file has to be specified in addition to the
  --cell_uuid option that is provided i.e like this :

  nova-manage --config-file /etc/nova/nova_cell2.conf cell_v2
  map_instances --cell_uuid ""

  So it is better if this info is taken from the cell_mappings table
  inside the API database. Basically query for the database_connection
  column value of the cell provided, from the cell_mappings table in
  nova-api DB and map the unmapped instances to the --cell_uuid that is
  provided.

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