Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: zfs-linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/2043253
Title:
zfs-mount-generator results in ZFS Boot Stuck - Please Give Root
Password or Press CTRL+D to Continue
Status in zfs-linux package in Ubuntu:
Confirmed
Bug description:
System Boot is Abnormal. Gives the message "Give root password for
maintenance or press CTRL+D to continue".
I installed Ubuntu 23.10 on NVME using debootstrap (UEFI install).
I tried to re-generate the zfs cache and that seems to be set
correctly in /etc/zfs/zfs-list.cache/rpool.
It is possible that the /root, /var/log, /home/ folders contained some
data already. I tried to empty them and reboot, to make sure that ZFS
would mount correctly.
Strangely enough zfs mount -a quickly finishes (without errors) while
mount -a seems to enter an infinite loop.
The culprit issue seems to be (based on log files):
```
Nov 10 14:00:04 UbuntuWorkstation11 systemd[1]: Reloading requested from
client PID 1743 (unit emergency.service)...
Nov 10 14:00:04 UbuntuWorkstation11 systemd[1]: Reloading...
Nov 10 14:00:04 UbuntuWorkstation11 (sd-execu[1747]:
/usr/lib/systemd/system-generators/zfs-mount-generator.orig failed with exit
status 1.
Nov 10 14:00:04 UbuntuWorkstation11 (sd-execu[1747]:
/usr/lib/systemd/system-generators/zfs-mount-generator failed with exit status
1.
Nov 10 14:00:04 UbuntuWorkstation11 ERROR: zfs-mount-generator failed and you
requested a revert:
Nov 10 14:00:04 UbuntuWorkstation11 systemd[1]: Reloading finished in 469 ms.
Nov 10 14:00:04 UbuntuWorkstation11 systemd[1]: Reloading requested from
client PID 1807 (unit emergency.service)...
Nov 10 14:00:04 UbuntuWorkstation11 systemd[1]: Reloading...
Nov 10 14:00:04 UbuntuWorkstation11 (sd-execu[1811]:
/usr/lib/systemd/system-generators/zfs-mount-generator failed with exit status
1.
Nov 10 14:00:04 UbuntuWorkstation11 (sd-execu[1811]:
/usr/lib/systemd/system-generators/zfs-mount-generator.orig failed with exit
status 1.
Nov 10 14:00:04 UbuntuWorkstation11 ERROR: zfs-mount-generator failed and you
requested a revert:
Nov 10 14:00:05 UbuntuWorkstation11 systemd[1]: Reloading finished in 466 ms.
Nov 10 14:00:05 UbuntuWorkstation11 systemd[1]: Reloading requested from
client PID 1733 (unit emergency.service)...
Nov 10 14:00:05 UbuntuWorkstation11 systemd[1]: Reloading...
Nov 10 14:00:05 UbuntuWorkstation11 (sd-execu[1873]:
/usr/lib/systemd/system-generators/zfs-mount-generator failed with exit status
1.
Nov 10 14:00:05 UbuntuWorkstation11 (sd-execu[1873]:
/usr/lib/systemd/system-generators/zfs-mount-generator.orig failed with exit
status 1.
Nov 10 14:00:05 UbuntuWorkstation11 ERROR: zfs-mount-generator failed and you
requested a revert:
Nov 10 14:00:05 UbuntuWorkstation11 systemd[1]: Reloading finished in 467 ms.
Nov 10 14:00:12 UbuntuWorkstation11 systemd[1]: Stopped target
emergency.target - Emergency Mode.
```
It's difficult to know where the issue lies exactly, if the script/program
doesn't return more informations on where it's actually failing.
```
root@UbuntuWorkstation11:/# zfs list
NAME USED AVAIL REFER MOUNTPOINT
rpool 7.30G 1.75T 96K none
rpool/ROOT 7.29G 1.75T 96K none
rpool/ROOT/ubuntu 7.29G 1.75T 6.81G /
rpool/ROOT/ubuntu/srv 96K 1.75T 96K /srv
rpool/ROOT/ubuntu/tmp 408K 1.75T 136K /tmp
rpool/ROOT/ubuntu/usr 424K 1.75T 96K /usr
rpool/ROOT/ubuntu/usr/local 328K 1.75T 192K /usr/local
rpool/ROOT/ubuntu/var 262M 1.75T 96K /var
rpool/ROOT/ubuntu/var/games 96K 1.75T 96K /var/games
rpool/ROOT/ubuntu/var/lib 259M 1.75T 56.4M /var/lib
rpool/ROOT/ubuntu/var/lib/AccountsService 224K 1.75T 96K
/var/lib/AccountsService
rpool/ROOT/ubuntu/var/lib/NetworkManager 236K 1.75T 116K
/var/lib/NetworkManager
rpool/ROOT/ubuntu/var/lib/apt 123M 1.75T 122M /var/lib/apt
rpool/ROOT/ubuntu/var/lib/dpkg 77.9M 1.75T 65.7M /var/lib/dpkg
rpool/ROOT/ubuntu/var/log 1.64M 1.75T 236K /var/log
rpool/ROOT/ubuntu/var/mail 96K 1.75T 96K /var/mail
rpool/ROOT/ubuntu/var/spool 264K 1.75T 144K /var/spool
rpool/ROOT/ubuntu/var/www 96K 1.75T 96K /var/www
rpool/USERDATA 524K 1.75T 96K none
rpool/USERDATA/root 276K 1.75T 140K /root
rpool/USERDATA/stefano 152K 1.75T 96K /home/stefano
```
The mounting order to /root, /home/stefano and /var/tmp is suspicious. And I
have a feeling that ZFS keeps trying to automount since e.g. the journalctl log
file that I created in /root/ quickly disappeared after creation.
```
root@UbuntuWorkstation11:/# cat /etc/fstab
# /boot Partition
UUID=8ce455bf-bc4e-4fe4-8a53-c488af3bb89c /boot ext4 auto 0 1
# /boot/efi Data
UUID=C39A-FFBB /boot/efi vfat umask=0022,fmask=0022,dmask=0022 0 1
# Tools over NFS
nas.home:/export/tools /tools_nfs nfs
rw,user=tools,auto,nfsvers=3 0 0
```
Tried ZFS 2.2.0 ("final") from mantic-proposed repository, but same
issue happens. It seems zfs-mount-generator causes the boot process to
fail, thus systemd requests Root Password or CTRL+D to continue.
```
root@UbuntuWorkstation02:/# zfs version
zfs-2.2.0-0ubuntu1~23.10
zfs-kmod-2.2.0-0ubuntu1~23.10
```
The bug is also reported upstream, however it's very likely to be
Ubuntu-specific, since no other person complained about it.
Upstream bug report: https://github.com/openzfs/zfs/issues/15512
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