[Bug 1994521] Re: HPE3PAR: Failing to clone a volume having children

[Launchpad Bug Tracker]

This bug was fixed in the package cinder - 2:20.3.1-0ubuntu1.2

---------------
cinder (2:20.3.1-0ubuntu1.2) jammy; urgency=medium

  [ Jorge Merlino ]
  * Increase size of volume image metadata values to 65535 bytes
    (LP: #1988942)

  [ Heather Lemon ]
  * Start cinder-volume.service after tgt.service started (LP: #1987663)
    - d/cinder-volume.service.conf: drop-in with 'After=' and 'Wants='
      ('Wants=' is not generated by pkgos-gen-systemd-unit currently).
    - d/cinder-volume.install: ship the systemd service drop-in file.

  [ Seyeong Kim ]
  * HPE3PAR: Failing to clone a volume having children (LP: #1994521):
    - d/p/0001-HPE-3PAR-Fix-umanaged-volumes-snapshots-missing.patch
    - d/p/0002-3PAR-Error-out-if-vol-cannot-be-converted-to-base.patch
    - api 4.0.17 is added as it is in the middle of the main patch
      (4.0.18)

 -- Mauricio Faria de Oliveira <mfo at canonical.com>  Fri, 19 Apr 2024
11:04:46 -0300

** Changed in: cinder (Ubuntu Jammy)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1994521

Title:
  HPE3PAR: Failing to clone a volume having children

Status in Cinder:
  Fix Released
Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive antelope series:
  Triaged
Status in Ubuntu Cloud Archive bobcat series:
  Fix Released
Status in Ubuntu Cloud Archive yoga series:
  In Progress
Status in cinder package in Ubuntu:
  Fix Released
Status in cinder source package in Focal:
  In Progress
Status in cinder source package in Jammy:
  Fix Released
Status in cinder source package in Mantic:
  Fix Released
Status in cinder source package in Noble:
  Fix Released

Bug description:
  [Impact]

  The customer faced issue when they are using nova with 3par storage.
  they can't delete volume if there is children and it is attached to vm.

  it makes sense they can't delete it as the children has attachment but
  nova should expose proper error when trying deletion.

  [Test Case]

  The customer has the required hardware for testing this.

  Volume->Snapshot->Volume2
  Volume2 is attached to some VM.
  and can't delete Volume without proper error msg.

  [Where problems could occur]
  This is related to hpe3par storage.
  snapshot handling could be issue with this patch.
  deleting volume could be issue with this patch.

  [Others]

  Original Desc

  When we try to delete a snapshot, we flatten it's dependent volumes by copying them to a new volume and deleting the original one.
  We fail to copy the volume when it has children and it is not handled in the code.

  : hpe3parclient.exceptions.HTTPConflict: Conflict (HTTP 409) 32 -
  volume has a child

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