The latter; This may only be a packaging issue in that bionic release of tools don't report an error up through apt, where in focal (and eoan) report an error to apt.
** Changed in: zfs-linux (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Kernel 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; echo $? == 0 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. E: Sub-process /usr/bin/dpkg returned an error code (1) 100 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1862661/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp