zfs-dkms install fail on debian buster

[loozhengyuan]

System information

Type	Version/Name
Distribution Name	Debian
Distribution Version	10 Buster
Linux Kernel	4.19.0-6-amd64
Architecture	x86_64
ZFS Version	0.8.2-2~bpo10+1
SPL Version	-

Describe the problem you're observing

Installation fails consistently on Debian 10

Describe how to reproduce the problem

sudo apt install linux-headers-amd64
sudo apt install dkms
sudo apt install zfs-dkms zfsutils-linux

Include any warning/errors/backtraces from the system logs

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libnvpair1linux libuutil1linux libzfs2linux libzpool2linux python3-distutils
  python3-lib2to3 zfs-zed
Suggested packages:
  nfs-kernel-server samba-common-bin zfs-initramfs | zfs-dracut
The following NEW packages will be installed:
  libnvpair1linux libuutil1linux libzfs2linux libzpool2linux python3-distutils
  python3-lib2to3 zfs-dkms zfs-zed zfsutils-linux
0 upgraded, 9 newly installed, 0 to remove and 0 not upgraded.
Need to get 3,637 kB of archives.
After this operation, 20.4 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://deb.debian.org/debian buster-backports/contrib amd64 libnvpair1linux amd64 0.8.2-2~bpo10+1 [55.1 kB]
Get:2 http://deb.debian.org/debian buster-backports/contrib amd64 libuutil1linux amd64 0.8.2-2~bpo10+1 [48.1 kB]
Get:3 http://deb.debian.org/debian buster-backports/contrib amd64 libzfs2linux amd64 0.8.2-2~bpo10+1 [215 kB]
Get:4 http://deb.debian.org/debian buster-backports/contrib amd64 libzpool2linux amd64 0.8.2-2~bpo10+1 [811 kB]
Get:5 http://deb.debian.org/debian buster/main amd64 python3-lib2to3 all 3.7.3-1 [76.7 kB]
Get:6 http://deb.debian.org/debian buster/main amd64 python3-distutils all 3.7.3-1 [142 kB]
Get:7 http://deb.debian.org/debian buster-backports/contrib amd64 zfs-dkms all 0.8.2-2~bpo10+1 [1,859 kB]
Get:8 http://deb.debian.org/debian buster-backports/contrib amd64 zfsutils-linux amd64 0.8.2-2~bpo10+1 [361 kB]
Get:9 http://deb.debian.org/debian buster-backports/contrib amd64 zfs-zed amd64 0.8.2-2~bpo10+1 [68.3 kB]
Fetched 3,637 kB in 0s (23.8 MB/s)
Preconfiguring packages ...
Selecting previously unselected package libnvpair1linux.
(Reading database ... 66711 files and directories currently installed.)
Preparing to unpack .../0-libnvpair1linux_0.8.2-2~bpo10+1_amd64.deb ...
Unpacking libnvpair1linux (0.8.2-2~bpo10+1) ...
Selecting previously unselected package libuutil1linux.
Preparing to unpack .../1-libuutil1linux_0.8.2-2~bpo10+1_amd64.deb ...
Unpacking libuutil1linux (0.8.2-2~bpo10+1) ...
Selecting previously unselected package libzfs2linux.
Preparing to unpack .../2-libzfs2linux_0.8.2-2~bpo10+1_amd64.deb ...
Unpacking libzfs2linux (0.8.2-2~bpo10+1) ...
Selecting previously unselected package libzpool2linux.
Preparing to unpack .../3-libzpool2linux_0.8.2-2~bpo10+1_amd64.deb ...
Unpacking libzpool2linux (0.8.2-2~bpo10+1) ...
Selecting previously unselected package python3-lib2to3.
Preparing to unpack .../4-python3-lib2to3_3.7.3-1_all.deb ...
Unpacking python3-lib2to3 (3.7.3-1) ...
Selecting previously unselected package python3-distutils.
Preparing to unpack .../5-python3-distutils_3.7.3-1_all.deb ...
Unpacking python3-distutils (3.7.3-1) ...
Selecting previously unselected package zfs-dkms.
Preparing to unpack .../6-zfs-dkms_0.8.2-2~bpo10+1_all.deb ...
Unpacking zfs-dkms (0.8.2-2~bpo10+1) ...
Selecting previously unselected package zfsutils-linux.
Preparing to unpack .../7-zfsutils-linux_0.8.2-2~bpo10+1_amd64.deb ...
Unpacking zfsutils-linux (0.8.2-2~bpo10+1) ...
Selecting previously unselected package zfs-zed.
Preparing to unpack .../8-zfs-zed_0.8.2-2~bpo10+1_amd64.deb ...
Unpacking zfs-zed (0.8.2-2~bpo10+1) ...
Setting up libuutil1linux (0.8.2-2~bpo10+1) ...
Setting up libnvpair1linux (0.8.2-2~bpo10+1) ...
Setting up python3-lib2to3 (3.7.3-1) ...
Setting up python3-distutils (3.7.3-1) ...
Setting up zfs-dkms (0.8.2-2~bpo10+1) ...
Loading new zfs-0.8.2 DKMS files...
Building for 4.19.0-6-amd64
Building initial module for 4.19.0-6-amd64
Done.

zavl.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/4.19.0-6-amd64/updates/dkms/

znvpair.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/4.19.0-6-amd64/updates/dkms/

zunicode.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/4.19.0-6-amd64/updates/dkms/

zcommon.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/4.19.0-6-amd64/updates/dkms/

zfs.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/4.19.0-6-amd64/updates/dkms/

icp.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/4.19.0-6-amd64/updates/dkms/

zlua.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/4.19.0-6-amd64/updates/dkms/

spl.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/4.19.0-6-amd64/updates/dkms/

depmod.....

DKMS: install completed.
Setting up libzpool2linux (0.8.2-2~bpo10+1) ...
Setting up zfsutils-linux (0.8.2-2~bpo10+1) ...
Created symlink /etc/systemd/system/zfs-import.target.wants/zfs-import-cache.service → /lib/systemd/system/zfs-import-cache.service.
Created symlink /etc/systemd/system/zfs.target.wants/zfs-import.target → /lib/systemd/system/zfs-import.target.
Created symlink /etc/systemd/system/zfs.target.wants/zfs-mount.service → /lib/systemd/system/zfs-mount.service.
Created symlink /etc/systemd/system/zfs.target.wants/zfs-share.service → /lib/systemd/system/zfs-share.service.
Created symlink /etc/systemd/system/zfs-volumes.target.wants/zfs-volume-wait.service → /lib/systemd/system/zfs-volume-wait.service.
Created symlink /etc/systemd/system/zfs.target.wants/zfs-volumes.target → /lib/systemd/system/zfs-volumes.target.
Created symlink /etc/systemd/system/multi-user.target.wants/zfs.target → /lib/systemd/system/zfs.target.
zfs-import-scan.service is a disabled or a static unit, not starting it.
Job for zfs-mount.service failed because the control process exited with error code.
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 (/lib/systemd/system/zfs-mount.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Mon 2019-10-14 23:59:22 +08; 8ms ago
     Docs: man:zfs(8)
  Process: 101657 ExecStart=/sbin/zfs mount -a (code=exited, status=1/FAILURE)
 Main PID: 101657 (code=exited, status=1/FAILURE)

Oct 14 23:59:22 lab3 systemd[1]: Starting Mount ZFS filesystems...
Oct 14 23:59:22 lab3 zfs[101657]: The ZFS modules are not loaded.
Oct 14 23:59:22 lab3 zfs[101657]: Try running '/sbin/modprobe zfs' as root to load them.
Oct 14 23:59:22 lab3 systemd[1]: zfs-mount.service: Main process exited, code=exited, status=1/FAILURE
Oct 14 23:59:22 lab3 systemd[1]: zfs-mount.service: Failed with result 'exit-code'.
Oct 14 23:59:22 lab3 systemd[1]: Failed to start Mount ZFS filesystems.
dpkg: error processing package zfsutils-linux (--configure):
 installed zfsutils-linux package post-installation script subprocess returned error exit status 1
dpkg: dependency problems prevent configuration of zfs-zed:
 zfs-zed depends on zfsutils-linux (>= 0.8.2-2~bpo10+1); however:
  Package zfsutils-linux is not configured yet.

dpkg: error processing package zfs-zed (--configure):
 dependency problems - leaving unconfigured
Processing triggers for systemd (241-7~deb10u1) ...
Processing triggers for man-db (2.8.5-2) ...
Processing triggers for libc-bin (2.28-10) ...
Errors were encountered while processing:
 zfsutils-linux
 zfs-zed
E: Sub-process /usr/bin/dpkg returned an error code (1)

So yes, running sudo /sbin/modprobe zfs then rerunning the failed install step sudo apt install zfs-dkms zfsutils-linux does work. Not sure if this is a known issue or anything, but it did not seem normal to me.

[loozhengyuan]

Duplicate of #6083

[loozhengyuan]

FYI, for anyone that stumbled upon this. I was having problems with this as an ansible play, so an error like this is not ideal. What I later found was that apt install zfs-dkms will include the installation of zfsutils-linux, which causes that install step to fail. The solution I have was to:

sudo apt install dkms
sudo apt install zfs-dkms —no-install-recommends
sudo modprobe zfs
sudo apt install zfsutils-linux