Let me know what I can do to help move this forward. The ubuntu-load-
zfs-unconditionally patch was not a great solution as it results in
systems that install zfsutils-linux to come up in a failed state when
there are no ZFS pools present:
$ systemctl --failed
UNIT LOAD ACTIVE SUB DESCRIPTION
* zfs-import-cache.service loaded failed failed Import ZFS pools by cache file
We use a common system image across a large fleet, some with ZFS pools,
most without - and would prefer not having to do a local override.conf
in our image.
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zfs-import-cache.service fails on startup
Status in zfs-linux package in Ubuntu:
I just noticed on my test VM of artful that zfs-import-cache.service
does not have a ConditionPathExists=/etc/zfs/zpool.cache. Because of
that, it fails on startup, since the cache file does not exist.
This line is being deleted by
debian/patches/ubuntu-load-zfs-unconditionally.patch. This patch seems to exist
This patch still exists in bionic, so I assume it will be similarly
If the goal of the patch is to load the module (and only that), I
think it should create a third unit instead:
^^ runs modprobe zfs
zfs-import-cache.service & zfs-import-scan.service
^^ per upstream minus modprobe plus Requires=zfs-load-module.service
I have tested this manually and it works. I can submit a package patch
if this is the desired solution.
Interestingly, before this change, zfs-import-scan.service wasn't
starting. If started manually, it worked. I had to give it a
`systemctl enable zfs-import-scan.service` to create the Wants
symlinks. Looking at the zfsutils-linux.postinst, I see the correct
boilerplate from dh_systemd, so I'm not sure why this wasn't already
done. Can anyone confirm or deny whether zfs-import-scan.service is
enabled out-of-the-box on their system?
Is the zfs-import-scan.service not starting actually the cause of the
original bug? The design is that *either* zfs-import-cache.service or
zfs-import-scan.service starts. They both call modprobe zfs.
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