[Bug 1835354] Re: disco: ceph-mgr unable to load crash module under py3

[James Page]

Nautilus release includes these commits so marked Fix Released in Eoan
development.

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https://bugs.launchpad.net/bugs/1835354

Title:
  disco: ceph-mgr unable to load crash module under py3

Status in ceph package in Ubuntu:
  Fix Released
Status in ceph source package in Disco:
  Triaged
Status in ceph source package in Eoan:
  Fix Released

Bug description:
  On startup the ceph-mgr daemon fails to load the crash module due to
  invalid Python 3 syntax:

  2019-07-04 04:11:54.533 7f1af75ab300  1 mgr[py] Loading python module 'crash'
  2019-07-04 04:11:54.605 7f1af75ab300 -1 mgr[py] Module not found: 'crash'
  2019-07-04 04:11:54.605 7f1af75ab300 -1 mgr[py] Traceback (most recent call last):

    File "/usr/lib/x86_64-linux-gnu/ceph/mgr/crash/__init__.py", line 1, in <module>
      from .module import Module
    File "/usr/lib/x86_64-linux-gnu/ceph/mgr/crash/module.py", line 48
      def inner((_, meta)):
                ^
  SyntaxError: invalid syntax

  Looking at the history for this module there are a number of
  syntax/compat fixes for Python3:

  https://github.com/ceph/ceph/commit/9aa1d49583ae8fb658967c054247cac6ec2125ab#diff-9433ab33e8bbf1048734205a3a1141ed
  https://github.com/ceph/ceph/commit/bcf0f4df2db8b51c58e5ca4d411d05e2a4d081ab#diff-9433ab33e8bbf1048734205a3a1141ed
  https://github.com/ceph/ceph/commit/6dc95544512362c202535139c323717ec867e20b#diff-9433ab33e8bbf1048734205a3a1141ed

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