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[melanie witt <1877189@xxxxxxxxxxxxxxxxxx>]

** Also affects: nova/wallaby
   Importance: Undecided
       Status: New

** Also affects: nova/ussuri
   Importance: Undecided
       Status: New

** Also affects: nova/victoria
   Importance: Undecided
       Status: New

** Also affects: nova/train
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1877189

Title:
  nova.task_log database records are never deleted

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) train series:
  New
Status in OpenStack Compute (nova) ussuri series:
  New
Status in OpenStack Compute (nova) victoria series:
  New
Status in OpenStack Compute (nova) wallaby series:
  New

Bug description:
  nova.task_log database records are related to the server usage audit
  log API [1] which is dependent on the [DEFAULT]/instance_usage_audit
  config option being set to True (it defaults to False). Enablement of
  the config option causes nova-compute to emit notifications which are
  consumed by OpenStack Telemetry. When the config option is enabled,
  records will be periodically created in the nova.task_log table. And
  there is no cleanup of the records in nova.

  I started a ML thread about the server usage audit log API awhile back
  [2] and the conclusion was that deprecating or removing the API isn't
  practical as there are systems in the wild still using it, so the best
  action to take for now is to create a nova-manage command for cleaning
  up old nova.task_log records.

  I brought up the proposal in a nova meeting [3] and in the nova
  channel [4] and the consensus was to treat it as a Wishlist bug so
  that it can be backported upstream.

  So this is a bug for the work to add a new 'nova-manage db
  purge_task_log' command that offers a --before <datetime> option.

  [1] http://eavesdrop.openstack.org/irclogs/%23openstack-nova/%23openstack-nova.2019-09-06.log.html#t2019-09-06T14:19:50
  [2] http://lists.openstack.org/pipermail/openstack-discuss/2019-September/009245.html
  [3] http://eavesdrop.openstack.org/meetings/nova/2019/nova.2019-10-17-14.00.log.html#l-306
  [4] http://eavesdrop.openstack.org/irclogs/%23openstack-nova/%23openstack-nova.2019-10-17.log.html#t2019-10-17T14:54:39

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