Bug#951549: systemd-fstab-generator: zfs entries in fstab should require zfs-import-scan or zfs-import-cache

[Peter B]

Package: systemd
Version: 244-3
Severity: normal



-- Package-specific info:

ZFS filesystems can be mounted through fstab, the zpool needs to be
imported before the mount. Currently systemd does not enforce
imports before mounts.

I demonstrably worked around this using this option in fstab:
	'x-systemd.requires=zfs-import-scan.service'

I believe more generically all zfs filesystems in fstab should 'want' to
be 'after' the following services:
	zfs-import-scan.service
	zfs-import-cache.service

The three ways I know to have Debian import zpools:
- systemd: zfs-import-scan.service
- systemd: zfs-import-cache.service
- zfs kernel module parameter: zfs_autoimport_disable=0

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.4.0-1-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1), LANGUAGE=en_US (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages systemd depends on:
ii  adduser          3.118
ii  libacl1          2.2.53-5
ii  libapparmor1     2.13.3-7
ii  libaudit1        1:2.8.5-2+b1
ii  libblkid1        2.34-0.1
ii  libc6            2.29-6
ii  libcap2          1:2.27-1
ii  libcryptsetup12  2:2.2.2-1
ii  libgcrypt20      1.8.5-3
ii  libgnutls30      3.6.11.1-2
ii  libgpg-error0    1.36-7
ii  libidn2-0        2.2.0-2
ii  libip4tc2        1.8.4-1
ii  libkmod2         26-3
ii  liblz4-1         1.9.2-2
ii  liblzma5         5.2.4-1+b1
ii  libmount1        2.34-0.1
ii  libpam0g         1.3.1-5
ii  libpcre2-8-0     10.34-7
ii  libseccomp2      2.4.2-2
ii  libselinux1      3.0-1
ii  libsystemd0      244-3
ii  mount            2.34-0.1
ii  util-linux       2.34-0.1

Versions of packages systemd recommends:
ii  dbus  1.12.16-2

Versions of packages systemd suggests:
ii  policykit-1        0.105-26
pn  systemd-container  <none>

Versions of packages systemd is related to:
pn  dracut           <none>
ii  initramfs-tools  0.135
ii  udev             244-3

-- no debconf information
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# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
UUID=99bc5718-d81c-11e9-ae7d-84349719f1b2	/        	ext4	defaults,noatime,errors=remount-ro	0 1
#UUID=cd07d6e4-7442-4661-90b1-b5fc5057b97a	/home    	ext4	defaults		0 2
zpool0/home					/home		zfs	defaults,noatime,x-systemd.requires=zfs-import-scan.service	0 0
UUID=FE5F-67F7                           	/boot/efi	vfat	umask=0077		0 1

tmpfs						/tmp    	tmpfs	size=25% 	0 0
tmpfs						/var/tmp	tmpfs	size=25% 	0 0

/dev/sr0        /media/cdrom0   udf,iso9660 user,noauto     0       0