[Bug 2065867] Re: mgr: failed dependency - no module named distutils

[James Page]

Verification completed using a core24 based microceph built with
proposed enabled:

# microceph.ceph -s
  cluster:
    id:     75f7e089-684c-43ad-9c32-1bbfd3d50f9a
    health: HEALTH_OK
 
  services:
    mon: 1 daemons, quorum sunbeam-allinone (age 2m)
    mgr: sunbeam-allinone(active, since 2m)
    osd: 3 osds: 3 up (since 8s), 3 in (since 10s)
 
  data:
    pools:   1 pools, 1 pgs
    objects: 2 objects, 577 KiB
    usage:   83 MiB used, 150 GiB / 150 GiB avail
    pgs:     1 active+clean
 


** Tags removed: verification-needed verification-needed-noble
** Tags added: verification-done verification-done-noble

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https://bugs.launchpad.net/bugs/2065867

Title:
  mgr: failed dependency - no module named distutils

Status in ceph package in Ubuntu:
  Fix Released
Status in ceph source package in Noble:
  Fix Committed
Status in ceph source package in Oracular:
  Fix Released

Bug description:
  [ Impact ]
  dashboard and volume ceph mgr modules fail to activate under Python 3.12 due to use of distutils.

  [ Test Plan ]
  sudo snap install --channel latest/edge/core24 microceph
  sudo microceph cluster bootstrap
  sudo microceph status

  for proposed testing we'll bake a core24-proposed snap to test with.

  [ Where problems could occur ]
  The proposed patch switches to using the vendored distutils in setuptools for the two imports in the ceph mgr modules that exhibit this issue - this is a minimal fix; codebase really needs refactoring to drop all use of distutils but that's outside of the scope on an SRU update.

  Other distutils usage gets caught by the distutils_hack that
  setuptools uses to inject its vendored copy into the distutils module
  location.

  [ Original Bug Report ]
  When running microceph on a core24 base, the ceph-mgr has errors on enabling specific modules - volume and dashboard.

  $ sudo microceph.ceph status
    cluster:
      id:     4e3ff87c-5320-4494-9d3c-42e69cc11398
      health: HEALTH_WARN
              Module 'volumes' has failed dependency: No module named 'distutils'
              OSD count 0 < osd_pool_default_size 3

    services:
      mon: 1 daemons, quorum joplin.glenview.com (age 5s)
      mgr: joplin.glenview.com(active, starting, since 0.942931s)
      osd: 0 osds: 0 up, 0 in

    data:
      pools:   0 pools, 0 pgs
      objects: 0 objects, 0 B
      usage:   0 B used, 0 B / 0 B avail
      pgs:

  distutils as a standalone package was removed from noble - the ceph
  codebase makes quite a bit of use of distuils still which gets picked
  up by the distutils_hack in setuptools but not in the context of the
  mgr daemon.

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