Public bug reported:

1) 
# lsb_release -rd
Description:    Ubuntu Focal Fossa (development branch)
Release:        20.04

2)
# apt-cache policy zfsutils-linux
zfsutils-linux:
  Installed: (none)
  Candidate: 0.8.3-1ubuntu3
  Version table:
     0.8.3-1ubuntu3 500
        500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages

3) apt install zfsutils-linux installs successfully
4) apt install zfsutils-linux installs but apt returns error code due to zfs 
services failing to start successfully

See "systemctl status zfs-mount.service" and "journalctl -xe" for details.
invoke-rc.d: initscript zfs-mount, action "start" failed.
● zfs-mount.service - Mount ZFS filesystems
     Loaded: loaded 
(]8;;file://f2/lib/systemd/system/zfs-mount.service/lib/systemd/system/zfs-mount.service]8;;;
 enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Mon 2020-02-10 16:18:04 UTC; 23ms 
ago
       Docs: ]8;;man:zfs(8)man:zfs(8)]8;;
    Process: 1672 ExecStart=/sbin/zfs mount -a (code=exited, status=1/FAILURE)
   Main PID: 1672 (code=exited, status=1/FAILURE)

Feb 10 16:18:04 f2 systemd[1]: Starting Mount ZFS filesystems...
Feb 10 16:18:04 f2 zfs[1672]: /dev/zfs and /proc/self/mounts are required.
Feb 10 16:18:04 f2 zfs[1672]: Try running 'udevadm trigger' and 'mount -t proc 
proc /proc' as root.
Feb 10 16:18:04 f2 systemd[1]: zfs-mount.service: Main process exited, 
code=exited, status=1/FAILURE
Feb 10 16:18:04 f2 systemd[1]: zfs-mount.service: Failed with result 
'exit-code'.
Feb 10 16:18:04 f2 systemd[1]: Failed to start Mount ZFS filesystems.

I'm inside a LXD unpriv container.  By default, there are no permissions
to mount proc, modprobe modules, etc.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: zfsutils-linux 0.8.3-1ubuntu3
ProcVersionSignature: Ubuntu 5.4.0-9.12-generic 5.4.3
Uname: Linux 5.4.0-9-generic x86_64
ApportVersion: 2.20.11-0ubuntu16
Architecture: amd64
Date: Mon Feb 10 15:50:42 2020
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=C.UTF-8
SourcePackage: zfs-linux
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: zfs-linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug curtin focal uec-images

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Packages, which is subscribed to zfs-linux in Ubuntu.
https://bugs.launchpad.net/bugs/1862661

Title:
  zfs-mount.service and others fail inside unpriv containers

Status in zfs-linux package in Ubuntu:
  New

Bug description:
  1) 
  # lsb_release -rd
  Description:  Ubuntu Focal Fossa (development branch)
  Release:      20.04

  2)
  # apt-cache policy zfsutils-linux
  zfsutils-linux:
    Installed: (none)
    Candidate: 0.8.3-1ubuntu3
    Version table:
       0.8.3-1ubuntu3 500
          500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages

  3) apt install zfsutils-linux installs successfully
  4) apt install zfsutils-linux installs but apt returns error code due to zfs 
services failing to start successfully

  See "systemctl status zfs-mount.service" and "journalctl -xe" for details.
  invoke-rc.d: initscript zfs-mount, action "start" failed.
  ● zfs-mount.service - Mount ZFS filesystems
       Loaded: loaded 
(]8;;file://f2/lib/systemd/system/zfs-mount.service/lib/systemd/system/zfs-mount.service]8;;;
 enabled; vendor preset: enabled)
       Active: failed (Result: exit-code) since Mon 2020-02-10 16:18:04 UTC; 
23ms ago
         Docs: ]8;;man:zfs(8)man:zfs(8)]8;;
      Process: 1672 ExecStart=/sbin/zfs mount -a (code=exited, status=1/FAILURE)
     Main PID: 1672 (code=exited, status=1/FAILURE)

  Feb 10 16:18:04 f2 systemd[1]: Starting Mount ZFS filesystems...
  Feb 10 16:18:04 f2 zfs[1672]: /dev/zfs and /proc/self/mounts are required.
  Feb 10 16:18:04 f2 zfs[1672]: Try running 'udevadm trigger' and 'mount -t 
proc proc /proc' as root.
  Feb 10 16:18:04 f2 systemd[1]: zfs-mount.service: Main process exited, 
code=exited, status=1/FAILURE
  Feb 10 16:18:04 f2 systemd[1]: zfs-mount.service: Failed with result 
'exit-code'.
  Feb 10 16:18:04 f2 systemd[1]: Failed to start Mount ZFS filesystems.

  I'm inside a LXD unpriv container.  By default, there are no
  permissions to mount proc, modprobe modules, etc.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: zfsutils-linux 0.8.3-1ubuntu3
  ProcVersionSignature: Ubuntu 5.4.0-9.12-generic 5.4.3
  Uname: Linux 5.4.0-9-generic x86_64
  ApportVersion: 2.20.11-0ubuntu16
  Architecture: amd64
  Date: Mon Feb 10 15:50:42 2020
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=C.UTF-8
  SourcePackage: zfs-linux
  UpgradeStatus: No upgrade log present (probably fresh install)

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