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[Balazs Gibizer <1903545@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

This bug report is theoretic right now as I don't have actual data for a
failure scenario. Please add details below if you have one.

Nova supports rolling upgrade of nova-compute services by keeping the
compute RPC interface compatible between N and N - 1 (where N is a nova
major release, like Wallaby). Still nova does not prevent to have a
deployment with older than N - 1 computes. Some operations will still
work but some will fail with hard to debug errors, or even leave your
deployment in an inconsistent state.

Nova should prevent such inconsistencies.

** Affects: nova
     Importance: Low
     Assignee: Balazs Gibizer (balazs-gibizer)
         Status: Fix Released

** Affects: nova/train
     Importance: Undecided
         Status: New

** Affects: nova/ussuri
     Importance: Undecided
         Status: New

** Affects: nova/victoria
     Importance: Undecided
     Assignee: Balazs Gibizer (balazs-gibizer)
         Status: In Progress


** Tags: upgrade

** Changed in: nova
     Assignee: (unassigned) => Balazs Gibizer (balazs-gibizer)

** Tags added: upgrade

** Changed in: nova
       Status: New => Confirmed

** Changed in: nova
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1903545

Title:
  Nova does not support older than N - 1 computes but does not prevent
  such error situation either

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:
  In Progress

Bug description:
  This bug report is theoretic right now as I don't have actual data for
  a failure scenario. Please add details below if you have one.

  Nova supports rolling upgrade of nova-compute services by keeping the
  compute RPC interface compatible between N and N - 1 (where N is a
  nova major release, like Wallaby). Still nova does not prevent to have
  a deployment with older than N - 1 computes. Some operations will
  still work but some will fail with hard to debug errors, or even leave
  your deployment in an inconsistent state.

  Nova should prevent such inconsistencies.

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