Adding this bug as that seems to be the exact issue here - https://github.com/openzfs/zfs/issues/10140
Solution is "Use zfs-mount-generator instead of zfs-mount.service" ... ** Bug watch added: github.com/openzfs/zfs/issues #10140 https://github.com/openzfs/zfs/issues/10140 -- 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/1904764 Title: failed boot mount, and systemd ordering cycle on zfs-import.target Status in zfs-linux package in Ubuntu: Confirmed Bug description: On a new Ubuntu 20.10 ZoL root I frequently get boot failures, and I see these errors: [ 11.353930] systemd[1]: boot.mount: Mount process exited, code=exited, status=1/FAILURE [ 11.353934] systemd[1]: boot.mount: Failed with result 'exit-code'. [ 11.354267] systemd[1]: Failed to mount /boot. [ 11.354307] systemd[1]: Dependency failed for /boot/efi. [ 11.354327] systemd[1]: Dependency failed for /boot/grub. [ 11.354344] systemd[1]: Dependency failed for Local File Systems. [ 11.354365] systemd[1]: local-fs.target: Job local-fs.target/start failed with result 'dependency'. [ 11.354367] systemd[1]: local-fs.target: Triggering OnFailure= dependencies. [ 11.355088] systemd[1]: var-lib.mount: Found ordering cycle on zfs-import.target/start [ 11.355090] systemd[1]: var-lib.mount: Found dependency on zfs-import-cache.service/start [ 11.355091] systemd[1]: var-lib.mount: Found dependency on zfs-load-module.service/start [ 11.355093] systemd[1]: var-lib.mount: Found dependency on cryptsetup.target/start [ 11.355094] systemd[1]: var-lib.mount: Found dependency on systemd-cryptsetup@cryptoswap.service/start [ 11.355096] systemd[1]: var-lib.mount: Found dependency on systemd-random-seed.service/start [ 11.355097] systemd[1]: var-lib.mount: Found dependency on var-lib.mount/start [ 11.355099] systemd[1]: var-lib.mount: Job zfs-import.target/start deleted to break ordering cycle starting with var-lib.mount/start [ 11.355819] systemd[1]: boot-grub.mount: Job boot-grub.mount/start failed with result 'dependency'. [ 11.355823] systemd[1]: boot-efi.mount: Job boot-efi.mount/start failed with result 'dependency'. Journalctl shows "filesystem 'bpool/BOOT/ubuntu_o9gk00' cannot be mounted, unable to open the dataset" for boot.mount I can manually start boot.mount from the console, which then lets the boot process complete. N.B. "zfs list" is NAME USED AVAIL REFER MOUNTPOINT bpool 402M 1.36G 96K /boot bpool/BOOT 401M 1.36G 96K none bpool/BOOT/ubuntu_o9gk00 401M 1.36G 201M /boot rpool 171G 720G 192K / rpool/ROOT 9.26G 720G 192K none rpool/ROOT/ubuntu_ 1.57G 720G 5.16G / rpool/ROOT/ubuntu_o9gk00 7.69G 720G 4.24G / rpool/ROOT/ubuntu_o9gk00/srv 192K 720G 192K /srv rpool/ROOT/ubuntu_o9gk00/usr 1.02M 720G 192K /usr rpool/ROOT/ubuntu_o9gk00/usr/local 852K 720G 388K /usr/local rpool/ROOT/ubuntu_o9gk00/var 2.09G 720G 192K /var rpool/ROOT/ubuntu_o9gk00/var/games 192K 720G 192K /var/games rpool/ROOT/ubuntu_o9gk00/var/lib 1.85G 720G 1.42G /var/lib rpool/ROOT/ubuntu_o9gk00/var/lib/AccountsService 1.39M 720G 496K /var/lib/AccountsService rpool/ROOT/ubuntu_o9gk00/var/lib/NetworkManager 3.39M 720G 292K /var/lib/NetworkManager rpool/ROOT/ubuntu_o9gk00/var/lib/apt 87.2M 720G 78.0M /var/lib/apt rpool/ROOT/ubuntu_o9gk00/var/lib/dpkg 148M 720G 63.6M /var/lib/dpkg rpool/ROOT/ubuntu_o9gk00/var/log 223M 720G 94.2M /var/log rpool/ROOT/ubuntu_o9gk00/var/mail 1.19M 720G 224K /var/mail rpool/ROOT/ubuntu_o9gk00/var/snap 940K 720G 500K /var/snap rpool/ROOT/ubuntu_o9gk00/var/spool 26.7M 720G 5.52M /var/spool rpool/ROOT/ubuntu_o9gk00/var/www 192K 720G 192K /var/www rpool/USERDATA 162G 720G 192K / rpool/USERDATA/chris_hwz0bd 162G 720G 156G /home/chris rpool/USERDATA/root_hwz0bd 2.91M 720G 804K /root rpool/keystore 518M 720G 48.1M - To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1904764/+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
