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[Surya Seetharaman <1747936@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Presently when a host_mapping is deleted during the nova-manage cell_v2
deleted_cell operation, the compute node record still remains with its
mapped field set to 1. Due to this, if we delete a cell, and later
create a new cell, the discover_hosts command will not work and the
compute node will not get mapped to the new cell.

Solution:

Before the host is deleted during the delete_cell operation, the mapped
field in compute_nodes table should be set to 0.

This bug is similar to this one :
https://bugs.launchpad.net/nova/+bug/1735719, hence what was done for
the delete_host command should be done for the delete_cell command as
well.

** Affects: nova
     Importance: Undecided
     Assignee: Surya Seetharaman (tssurya)
         Status: New


** Tags: cells nova-manage

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https://bugs.launchpad.net/bugs/1747936

Title:
  Host is not unmapped when the host_mapping is deleted during
  delete_cell operation

Status in OpenStack Compute (nova):
  New

Bug description:
  Presently when a host_mapping is deleted during the nova-manage
  cell_v2 deleted_cell operation, the compute node record still remains
  with its mapped field set to 1. Due to this, if we delete a cell, and
  later create a new cell, the discover_hosts command will not work and
  the compute node will not get mapped to the new cell.

  Solution:

  Before the host is deleted during the delete_cell operation, the
  mapped field in compute_nodes table should be set to 0.

  This bug is similar to this one :
  https://bugs.launchpad.net/nova/+bug/1735719, hence what was done for
  the delete_host command should be done for the delete_cell command as
  well.

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