[Bug 1959712] Re: [SRU] Add iSCSI support to HPE 3PAR driver for Primera 4.2 and higher

[Corey Bryant]

This is in upstream stable/victoria but has not been included in a
stable point release yet. Therefore I will proposed new package versions
with this patch for the victoria cloud archive as well as focal
(ussuri).

** Also affects: cinder (Ubuntu Focal)
   Importance: Undecided
       Status: New

** Changed in: cinder (Ubuntu)
       Status: New => Invalid

** Changed in: cinder (Ubuntu Focal)
       Status: New => Triaged

** Changed in: cinder (Ubuntu Focal)
   Importance: Undecided => Wishlist

** Also affects: cloud-archive
   Importance: Undecided
       Status: New

** Also affects: cloud-archive/victoria
   Importance: Undecided
       Status: New

** Also affects: cloud-archive/ussuri
   Importance: Undecided
       Status: New

** Changed in: cloud-archive
       Status: New => Invalid

** Changed in: cloud-archive/ussuri
       Status: New => Triaged

** Changed in: cloud-archive/victoria
       Status: New => Triaged

** Changed in: cloud-archive/ussuri
   Importance: Undecided => Wishlist

** Changed in: cloud-archive/victoria
   Importance: Undecided => Wishlist

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https://bugs.launchpad.net/bugs/1959712

Title:
  [SRU] Add iSCSI support to HPE 3PAR driver for Primera 4.2 and higher

Status in Ubuntu Cloud Archive:
  Invalid
Status in Ubuntu Cloud Archive ussuri series:
  Triaged
Status in Ubuntu Cloud Archive victoria series:
  Triaged
Status in cinder package in Ubuntu:
  Invalid
Status in cinder source package in Focal:
  Triaged

Bug description:
  [Description]
  OpenStack cinder in Focal (OpenStack Ussuri) is lacking iSCSI support for HPE Primera 4.2 and higher. This is now supported in Cinder and we would like to enable it in Ubuntu Focal as well as OpenStack Ussuri.

  The rationale for this SRU falls under harware enablement for Long
  Term Support releases.

  [Test Case]
  1. Deploy OpenStack with:
   - HPE 3PAR *iSCSI* driver enabled for Cinder
   - with Primera >= 4.2
    as per: https://docs.openstack.org/cinder/latest/configuration/block-storage/drivers/hpe-3par-driver.html
  2. Create a volume
    openstack volume create (--type hpe-primera) --size 10 sru-test-before

  3. Confirm the volume is successfully created while it gave an error
  as "For Primera, only FC is supported. iSCSI cannot be used"
  previously.

  [Regression Potential]
  This is a pretty simple patch. Where the code used to always raise a not implemented error for Primera, it now raises the not implemented error only for < Primera 4.2. Where things could go wrong? It's possible the version checking could have an issue but that code seems standard and the upstream patch has been merged back to stable/victoria [1]. Regression testing will cover that code path as well.
  [1] https://review.opendev.org/c/openstack/cinder/+/820611

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