[Bug 1988081] Re: jammy-yoga neutron-db-manage results in AttributeError: module 'collections' has no attribute 'MutableMapping'

[Corey Bryant]

I don't think this is a package issue as the code in the jammy+
dnspython packages includes the collections.abc fix. Also note the
subtle difference in the traceback:

usr/local/lib/python3.10/dist-packages/dns/namedict.py

There is a pip installed package on the unit as well as an apt installed
package and the pip-installed version is getting picked up which causes
the issue:

ubuntu at juju-c42f04-zaza-e3abc6e946c3-6:/var/lib/juju/agents/unit-neutron-api-0/charm$ pip freeze|grep -i dns
dnspython==1.16.0

ubuntu at juju-c42f04-zaza-e3abc6e946c3-6:/var/lib/juju/agents/unit-neutron-api-0/charm$ apt policy python3-dnspython
python3-dnspython:
  Installed: 2.1.0-1ubuntu1
  Candidate: 2.1.0-1ubuntu1
  Version table:
 *** 2.1.0-1ubuntu1 500
        500 http://nova.clouds.archive.ubuntu.com/ubuntu jammy/main amd64 Packages


Running the neutron-db-manage command is successful after 'pip uninstall dnspython'.

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Title:
  jammy-yoga neutron-db-manage results in AttributeError: module
  'collections' has no attribute 'MutableMapping'

Status in dnspython package in Ubuntu:
  New
Status in neutron package in Ubuntu:
  New

Bug description:
  neutron-db-manage --config-file /etc/neutron/neutron.conf --config-
  file /etc/neutron/plugins/ml2/ml2_conf.ini upgrade head

  results in traceback: https://paste.ubuntu.com/p/SZgSHmmnym/plain/

  Pasting traceback here too:

  Traceback (most recent call last):
    File "/usr/bin/neutron-db-manage", line 10, in <module>
      sys.exit(main())
    File "/usr/lib/python3/dist-packages/neutron/db/migration/cli.py", line 661, in main
      return_val |= bool(CONF.command.func(config, CONF.command.name))
    File "/usr/lib/python3/dist-packages/neutron/db/migration/cli.py", line 183, in do_upgrade
      run_sanity_checks(config, revision)
    File "/usr/lib/python3/dist-packages/neutron/db/migration/cli.py", line 645, in run_sanity_checks
      script_dir.run_env()
    File "/usr/lib/python3/dist-packages/alembic/script/base.py", line 563, in run_env
      util.load_python_file(self.dir, "env.py")
    File "/usr/lib/python3/dist-packages/alembic/util/pyfiles.py", line 92, in load_python_file
      module = load_module_py(module_id, path)
    File "/usr/lib/python3/dist-packages/alembic/util/pyfiles.py", line 108, in load_module_py
      spec.loader.exec_module(module)  # type: ignore
    File "<frozen importlib._bootstrap_external>", line 883, in exec_module
    File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
    File "/usr/lib/python3/dist-packages/neutron/db/migration/alembic_migrations/env.py", line 16, in <module>
      from neutron_lib.db import model_base
    File "/usr/lib/python3/dist-packages/neutron_lib/__init__.py", line 17, in <module>
      from neutron_lib.db import api  # noqa
    File "/usr/lib/python3/dist-packages/neutron_lib/db/api.py", line 18, in <module>
      from oslo_concurrency import lockutils
    File "/usr/lib/python3/dist-packages/oslo_concurrency/lockutils.py", line 28, in <module>
      import fasteners
    File "/usr/lib/python3/dist-packages/fasteners/__init__.py", line 23, in <module>
      from fasteners.lock import locked  # noqa
    File "/usr/lib/python3/dist-packages/fasteners/lock.py", line 31, in <module>
      import eventlet
    File "/usr/lib/python3/dist-packages/eventlet/__init__.py", line 17, in <module>
      from eventlet import convenience
    File "/usr/lib/python3/dist-packages/eventlet/convenience.py", line 7, in <module>
      from eventlet.green import socket
    File "/usr/lib/python3/dist-packages/eventlet/green/socket.py", line 21, in <module>
      from eventlet.support import greendns
    File "/usr/lib/python3/dist-packages/eventlet/support/greendns.py", line 66, in <module>
      setattr(dns, pkg, import_patched('dns.' + pkg))
    File "/usr/lib/python3/dist-packages/eventlet/support/greendns.py", line 61, in import_patched
      return patcher.import_patched(module_name, **modules)
    File "/usr/lib/python3/dist-packages/eventlet/patcher.py", line 132, in import_patched
      return inject(
    File "/usr/lib/python3/dist-packages/eventlet/patcher.py", line 109, in inject
      module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
    File "/usr/local/lib/python3.10/dist-packages/dns/namedict.py", line 35, in <module>
      class NameDict(collections.MutableMapping):
  AttributeError: module 'collections' has no attribute 'MutableMapping'

  
  The issue looks to be in the dnspython package. It needs to be using collections.abc.MutableMapping

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