yahoo-eng-team team mailing list archive

[Julien Le Jeune <2085135@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Hi,

When we delete a nova-compute service, the 'mapped' field in
nova_cell1.compute_nodes table stays at 1 instead of 0 while
nova_api.host_mappings related entry is completely removed.

By letting that 'mapped' field to 1, it prevents nova-manage cell_v2
discover_hosts command to create the missing mapping. And that way, we
can't anymore spawn on that compute because it's not linked to any cell.


It may be linked to that bug: https://bugs.launchpad.net/nova/+bug/2077070

To fix, we can use the --by-service option: nova-manage cell_v2 discover_hosts --verbose --by-service
like mentioned here: https://bugs.launchpad.net/nova/+bug/2077070/comments/7

A more global fix would be to set the 'mapped' field to 0 at nova-
compute service deletion.


Environment
===========
- fresh Antelope deployment on Debian12
- self provisioned compute id

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2085135

Title:
  nova fails to map host which has a provisioned node identity after its
  nova-compute service was deleted

Status in OpenStack Compute (nova):
  New

Bug description:
  Hi,

  When we delete a nova-compute service, the 'mapped' field in
  nova_cell1.compute_nodes table stays at 1 instead of 0 while
  nova_api.host_mappings related entry is completely removed.

  By letting that 'mapped' field to 1, it prevents nova-manage cell_v2
  discover_hosts command to create the missing mapping. And that way, we
  can't anymore spawn on that compute because it's not linked to any
  cell.

  
  It may be linked to that bug: https://bugs.launchpad.net/nova/+bug/2077070

  To fix, we can use the --by-service option: nova-manage cell_v2 discover_hosts --verbose --by-service
  like mentioned here: https://bugs.launchpad.net/nova/+bug/2077070/comments/7

  A more global fix would be to set the 'mapped' field to 0 at nova-
  compute service deletion.

  
  Environment
  ===========
  - fresh Antelope deployment on Debian12
  - self provisioned compute id

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