[Bug 1843708] Re: [SRU] Key-pair is not updated during the rebuild

[Ubuntu Foundations Team Bug Bot]

The attachment "bionic.debdiff" seems to be a debdiff.  The ubuntu-
sponsors team has been subscribed to the bug report so that they can
review and hopefully sponsor the debdiff.  If the attachment isn't a
patch, please remove the "patch" flag from the attachment, remove the
"patch" tag, and if you are member of the ~ubuntu-sponsors, unsubscribe
the team.

[This is an automated message performed by a Launchpad user owned by
~brian-murray, for any issue please contact him.]

** Tags added: patch

-- 
You received this bug notification because you are a member of Ubuntu
OpenStack, which is subscribed to Ubuntu Cloud Archive.
https://bugs.launchpad.net/bugs/1843708

Title:
  [SRU] Key-pair is not updated during the rebuild

Status in Ubuntu Cloud Archive:
  New
Status in Ubuntu Cloud Archive rocky series:
  Won't Fix
Status in Ubuntu Cloud Archive stein series:
  Fix Released
Status in Ubuntu Cloud Archive train series:
  Fix Released
Status in Ubuntu Cloud Archive ussuri series:
  Fix Released
Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) queens series:
  Fix Released
Status in OpenStack Compute (nova) rocky series:
  Fix Released
Status in OpenStack Compute (nova) stein series:
  Fix Released
Status in OpenStack Compute (nova) train series:
  Fix Released
Status in OpenStack Compute (nova) ussuri series:
  Fix Released
Status in nova package in Ubuntu:
  New
Status in nova source package in Bionic:
  New
Status in nova source package in Focal:
  Fix Released

Bug description:
  [ Impact ]

   * See the original bug description below

  [ Test Plan ]

   * See the original bug description below

  [ Where problems could occur ]

   * See the original bug description below

  [ Other Info ]
   
   * the fix 6a7a78a44 is already in stable/queens, but not in 17.0.13
   
   
  Original Bug Description
  ===========

  When we want to rebuild an instance and change the keypair we can specified it with :
  openstack --os-compute-api-version 2.54  server rebuild --image "Debian 10" --key-name key1 instance1

  This comes from this implementation :
  https://review.opendev.org/#/c/379128/
  https://specs.openstack.org/openstack/nova-specs/specs/queens/implemented/rebuild-keypair-reset.html

  But when rebuilding the instance, Cloud-Init will set the key in authorized_keys from
  http://169.254.169.254/openstack/latest/meta_data.json

  And this meta_data.json uses the keys from instance_extra tables
  But the keypair will be updated in the 'instances' table but not in the 'instance_extra' table.

  So the keypair is not updated inside the VM

  May be this is the function for saving the keypair, but the save() do nothing :
  https://opendev.org/openstack/nova/src/branch/master/nova/objects/instance.py#L714

  Steps to reproduce
  ==================

  - Deploy a DevStack
  - Boot an instance with keypair key1
  - Rebuild it with key2
  - A nova show will show the key_name key2, keypairs object in table instance_extra is not updated and you cannot connect with key2 to the instance

  Expected result
  ===============
  Connecte to the Vm with the new keypair added during the rebuild call

  Actual result
  =============
  The keypair added during the rebuild call is not set in the VM

  Environment
  ===========
  I tested it on a Devstack from master and we have the behaviour.
  NOVA : commit 5fa49cd0b8b6015aa61b4312b2ce1ae780c42c64

To manage notifications about this bug go to:
https://bugs.launchpad.net/cloud-archive/+bug/1843708/+subscriptions