[Bug 1967576] Re: systemd: autopkgtest: tests-in-lxd fails because of remaining snap .mount units

Tue Apr 5 18:08:59 UTC 2022

The autopkgtest regressions blocking systemd 248.3-1ubuntu8.5 in impish-
proposed have been resolved. The regressions were caused either by (1)
network/infrastructure issues and succeeded on retry, or by (2)
unrelated snapd regressions.

This change is verified by the fact that the systemd tests-in-lxd
autopkgtest was fixed.

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

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

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

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https://bugs.launchpad.net/bugs/1967576

Title:
  systemd: autopkgtest: tests-in-lxd fails because of remaining snap
  .mount units

Status in systemd package in Ubuntu:
  New
Status in systemd source package in Impish:
  Fix Committed

Bug description:
  This build log provides an example of the problem:
  https://autopkgtest.ubuntu.com/results/autopkgtest-
  impish/impish/ppc64el/s/systemd/20220331_190433_fdbbe@/log.gz.

  During setup for tests-in-lxd, an attempt is made to purge snapd, but
  this fails:

  [ ... ]
  Purging configuration files for snapd (2.54.3+21.10.1ubuntu0.2) ...
  Stopping snap.lxd.activate.service
  Stopping unit snap.lxd.activate.service
  Waiting until unit snap.lxd.activate.service is stopped [attempt 1]
  snap.lxd.activate.service is stopped.
  Removing snap.lxd.activate.service
  Stopping snap.lxd.daemon.service
  Stopping unit snap.lxd.daemon.service
  Waiting until unit snap.lxd.daemon.service is stopped [attempt 1]
  snap.lxd.daemon.service is stopped.
  Removing snap.lxd.daemon.service
  Stopping snap.lxd.user-daemon.service
  Stopping unit snap.lxd.user-daemon.service
  Waiting until unit snap.lxd.user-daemon.service is stopped [attempt 1]
  snap.lxd.user-daemon.service is stopped.
  Removing snap.lxd.user-daemon.service
  Stopping snap-core20-1378.mount
  Stopping unit snap-core20-1378.mount
  Waiting until unit snap-core20-1378.mount is stopped [attempt 1]
  snap-core20-1378.mount is stopped.
  Removing snap core20 and revision 1378
  Removing snap-core20-1378.mount
  Stopping snap-lxd-22672.mount
  Stopping unit snap-lxd-22672.mount
  Waiting until unit snap-lxd-22672.mount is stopped [attempt 1]
  snap-lxd-22672.mount is stopped.
  Removing snap lxd and revision 22672
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/proc/cpuinfo': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/proc/meminfo': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/proc/stat': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/proc/uptime': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/proc/diskstats': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/proc/swaps': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/proc/loadavg': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/proc/slabinfo': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/cpu0': Operation not permitted
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/cpuidle': Operation not permitted
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/uevent': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/svm': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/hotplug': Operation not permitted
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/offline': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/present': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/power': Operation not permitted
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/dscr_default': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/probe': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/smt': Operation not permitted
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/vulnerabilities': Operation not permitted
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/cpufreq': Operation not permitted
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/isolated': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/kernel_max': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/sys/devices/system/cpu/modalias': Function not implemented
  rm: cannot remove '/var/snap/lxd/common/var/lib/lxcfs/cgroup': Input/output error
  dpkg: error processing package snapd (--purge):
   installed snapd package post-removal script subprocess returned error exit status 1
  [ ... ]

  This appears to result in some snap .mount units being left over in
  /etc/systemd/system. These leftover mount units will now always fail
  because snapd etc. is no longer installed. Thus, the 'test_no_failed'
  test, which checks for any failed units after boot, will fail:

  [ ... ]
  ======================================================================
  FAIL: test_no_failed (__main__.ServicesTest)
  No failed units
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File "/tmp/autopkgtest.s5bwuE/build.2Vb/real-tree/debian/tests/boot-and-services", line 69, in test_no_failed
      self.assertEqual(failed, [])
  AssertionError: Lists differ: ['snap-lxd-22672.mount   loaded failed fai[119 chars]180'] != []

  First list contains 2 additional elements.
  First extra element 0:
  'snap-lxd-22672.mount   loaded failed failed Mount unit for lxd, revision 22672'

  + []
  - ['snap-lxd-22672.mount   loaded failed failed Mount unit for lxd, revision '
  -  '22672',
  -  'snap-snapd-15180.mount loaded failed failed Mount unit for snapd, revision '
  -  '15180']

  ----------------------------------------------------------------------
  Ran 23 tests in 3.771s

  FAILED (failures=1, skipped=7)
  autopkgtest [18:16:43]: test boot-and-services: -----------------------]
  autopkgtest [18:16:44]: test boot-and-services:  - - - - - - - - - - results - - - - - - - - - -
  boot-and-services    FAIL non-zero exit status 1
  autopkgtest [18:16:44]: @@@@@@@@@@@@@@@@@@@@ summary
  boot-and-services    FAIL non-zero exit status 1
  autopkgtest [18:16:52]: test tests-in-lxd: -----------------------]
  autopkgtest [18:16:54]: test tests-in-lxd:  - - - - - - - - - - results - - - - - - - - - -
  tests-in-lxd         FAIL non-zero exit status 1
  [ ... ]

  The underlying snapd bug appears to be related to bug 1903967 and bug 1950864. In the mean time, the test should be fixed so this does not block systemd autopktests.

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