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[Ed Leafe <ed@xxxxxxxxx>]

Public bug reported:

The InstanceMapping class contains the 'instance_uuid' field. When
mapping instances, they can be done in batches, and in order to do this,
a marker containing the UUID of the last mapped instance is created in
the table. However, since the instance_uuid column has a unique
constraint, the value is munged by replacing the dashes ('-') with
spaces.

The oslo_versionedobjects module was recently updated to enforce the
validity of all values in UUID fields. As a transition, it only emits
warnings, but in the future, it will raise ValueErrors. Tests of the
mapping marker behavior show the warning:

oslo_versionedobjects/fields.py:348: FutureWarning: 655662b2 6573 42f9
abbf de92533e20a8 is an invalid UUID. Using UUIDFields with invalid
UUIDs is no longer supported, and will be removed in a future release.
Please update your code to input valid UUIDs or accept ValueErrors for
invalid UUIDs.

We need to update the InstanceMapping marker code to avoid creating
invalid UUIDs.

** Affects: nova
     Importance: Medium
     Assignee: Ed Leafe (ed-leafe)
         Status: New


** Tags: instancemapping uuid

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https://bugs.launchpad.net/bugs/1742760

Title:
  InstanceMapping uses invalid UUID

Status in OpenStack Compute (nova):
  New

Bug description:
  The InstanceMapping class contains the 'instance_uuid' field. When
  mapping instances, they can be done in batches, and in order to do
  this, a marker containing the UUID of the last mapped instance is
  created in the table. However, since the instance_uuid column has a
  unique constraint, the value is munged by replacing the dashes ('-')
  with spaces.

  The oslo_versionedobjects module was recently updated to enforce the
  validity of all values in UUID fields. As a transition, it only emits
  warnings, but in the future, it will raise ValueErrors. Tests of the
  mapping marker behavior show the warning:

  oslo_versionedobjects/fields.py:348: FutureWarning: 655662b2 6573 42f9
  abbf de92533e20a8 is an invalid UUID. Using UUIDFields with invalid
  UUIDs is no longer supported, and will be removed in a future release.
  Please update your code to input valid UUIDs or accept ValueErrors for
  invalid UUIDs.

  We need to update the InstanceMapping marker code to avoid creating
  invalid UUIDs.

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