Upgrade MAAS from 2.4 to 2.5 version - with "Ubuntu extra architectures" changed

[masterpe]

Hi,

As stated on https://discourse.maas.io/t/upgrade-maas-from-2-4-to-2-5-version/ I get an error when upgrading from MAAS 2.4 to 2.5.

from MAAS version: 2.4.2 (7034-g2f5deb8b8-0ubuntu1)
to MAAS version: 2.5.2 (7523-ge4ecbd54d-0ubuntu1~18.04.1)

I get the following error:

Setting up maas-region-controller (2.5.2-7523-ge4ecbd54d-0ubuntu1~18.04.1) ...
Operations to perform:
  Apply all migrations: auth, contenttypes, maasserver, metadataserver, piston3, sessions, sites
Running migrations:
  Applying maasserver.0161_pod_storage_pools... OK
  Applying maasserver.0162_storage_pools_notification... OK
  Applying maasserver.0163_create_new_power_parameters_with_jsonfield... OK
  Applying maasserver.0164_copy_over_existing_power_parameters... OK
  Applying maasserver.0165_remove_and_rename_power_parameters... OK
  Applying maasserver.0166_auto_select_s390x_extra_arches...Traceback (most recent call last):
  File "/usr/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/usr/lib/python3/dist-packages/maasserver/__main__.py", line 9, in <module>
    raise SystemExit(execute_from_command_line())
  File "/usr/lib/python3/dist-packages/maasserver/__init__.py", line 56, in execute_from_command_line
    management.execute_from_command_line()
  File "/usr/lib/python3/dist-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
    utility.execute()
  File "/usr/lib/python3/dist-packages/django/core/management/__init__.py", line 356, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/lib/python3/dist-packages/django/core/management/base.py", line 283, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/usr/lib/python3/dist-packages/django/core/management/base.py", line 330, in execute
    output = self.handle(*args, **options)
  File "/usr/lib/python3/dist-packages/maasserver/management/commands/dbupgrade.py", line 426, in handle
    fake_initial=self._south_was_performed(database))
  File "/usr/lib/python3/dist-packages/django/core/management/__init__.py", line 131, in call_command
    return command.execute(*args, **defaults)
  File "/usr/lib/python3/dist-packages/django/core/management/base.py", line 330, in execute
    output = self.handle(*args, **options)
  File "/usr/lib/python3/dist-packages/django/core/management/commands/migrate.py", line 204, in handle
    fake_initial=fake_initial,
  File "/usr/lib/python3/dist-packages/django/db/migrations/executor.py", line 115, in migrate
    state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
  File "/usr/lib/python3/dist-packages/django/db/migrations/executor.py", line 145, in _migrate_all_forwards
    state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
  File "/usr/lib/python3/dist-packages/django/db/migrations/executor.py", line 244, in apply_migration
    state = migration.apply(state, schema_editor)
  File "/usr/lib/python3/dist-packages/django/db/migrations/migration.py", line 129, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
  File "/usr/lib/python3/dist-packages/django/db/migrations/operations/special.py", line 193, in database_forwards
    self.code(from_state.apps, schema_editor)
  File "/usr/lib/python3/dist-packages/maasserver/migrations/builtin/maasserver/0166_auto_select_s390x_extra_arches.py", line 12, in add_s390x_to_pkg_repository_to_arches
    url='http://ports.ubuntu.com/ubuntu-ports')
  File "/usr/lib/python3/dist-packages/django/db/models/manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/django/db/models/query.py", line 380, in get
    self.model._meta.object_name
__fake__.DoesNotExist: PackageRepository matching query does not exist.
dpkg: error processing package maas-region-controller (--configure):
 installed maas-region-controller package post-installation script subprocess returned error exit status 1
dpkg: dependency problems prevent configuration of maas:
 maas depends on maas-region-controller (= 2.5.2-7523-ge4ecbd54d-0ubuntu1~18.04.1); however:
  Package maas-region-controller is not configured yet.

dpkg: error processing package maas (--configure):
 dependency problems - leaving unconfigured

The steps that I follow to repreduse the failure:
1. Create a new container:
  lxc-create -n maas -t download -- -d ubuntu -a amd64 -r bionic
2. start the container
  lxc-start -n maas
3. Attache the container
  lxc-attach -n maas su
4. update the apt
  apt update
5. install maas
  apt install maas
6. create maas user
7. change the repo
  setting -> "package repositories" -> "Ubuntu extra architectures" set the URL to: http://192.168.1.2/ubuntu

8. install add-apt-repository
  sudo apt-get install software-properties-common
9. add ppa:maas/stable
  add-apt-repository ppa:maas/stable
10. upgrade the packages:
  apt upgrade

root@maas:~# dpkg -l '*maas*'|cat
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===============================-======================================-============-=================================================
iU maas 2.5.2-7523-ge4ecbd54d-0ubuntu1~18.04.1 all "Metal as a Service" is a physical cloud and IPAM
ii maas-cli 2.5.2-7523-ge4ecbd54d-0ubuntu1~18.04.1 all MAAS client and command-line interface
un maas-cluster-controller <none> <none> (no description available)
ii maas-common 2.5.2-7523-ge4ecbd54d-0ubuntu1~18.04.1 all MAAS server common files
ii maas-dhcp 2.5.2-7523-ge4ecbd54d-0ubuntu1~18.04.1 all MAAS DHCP server
un maas-dns <none> <none> (no description available)
ii maas-proxy 2.5.2-7523-ge4ecbd54d-0ubuntu1~18.04.1 all MAAS Caching Proxy
ii maas-rack-controller 2.5.2-7523-ge4ecbd54d-0ubuntu1~18.04.1 all Rack Controller for MAAS
ii maas-region-api 2.5.2-7523-ge4ecbd54d-0ubuntu1~18.04.1 all Region controller API service for MAAS
iF maas-region-controller 2.5.2-7523-ge4ecbd54d-0ubuntu1~18.04.1 all Region Controller for MAAS
un maas-region-controller-min <none> <none> (no description available)
un python-django-maas <none> <none> (no description available)
un python-maas-client <none> <none> (no description available)
un python-maas-provisioningserver <none> <none> (no description available)
ii python3-django-maas 2.5.2-7523-ge4ecbd54d-0ubuntu1~18.04.1 all MAAS server Django web framework (Python 3)
ii python3-maas-client 2.5.2-7523-ge4ecbd54d-0ubuntu1~18.04.1 all MAAS python API client (Python 3)
ii python3-maas-provisioningserver 2.5.2-7523-ge4ecbd54d-0ubuntu1~18.04.1 all MAAS server provisioning libraries (Python 3)

[Adam Beeman (abeeman)]

I hit this issue as well during my upgrade. Since I don't need any other architectures than x86, I edited /usr/lib/python3/dist-packages/maasserver/migrations/builtin/maasserver/0166_auto_select_s390x_extra_arches.py and basically stubbed out the add_s390x_to_pkg_repository_to_arches() function, ran apt-update -y again, and the upgrade finished up just fine.

It's not a "solution" but if you are reading this because you hit the same issue, it's a viable workaround to get you out of trouble.

[Sascha Dewald (sdhd)]

i had a similar problem, when switching back from maas/next ppa to maas/stable

in my case i could fix the issue with:

  $ maas-region makemigrations

  $ apt install --reinstall maas-region-controller

[Jerzy Husakowski (jhusakowski)]

No longer an issue for more recent upgrades, edge case with a trivial workaround.