** Changed in: zfs-linux (Ubuntu)
Status: Confirmed => In Progress
** Changed in: zfs-linux (Ubuntu)
Importance: Undecided => High
** Changed in: zfs-linux (Ubuntu)
Assignee: (unassigned) => Colin Ian King (colin-king)
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https://bugs.launchpad.net/bugs/1741081
Title:
zfs-import-cache.service fails on startup
Status in zfs-linux package in Ubuntu:
In Progress
Bug description:
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
per:
https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/1672749
This patch still exists in bionic, so I assume it will be similarly
broken.
If the goal of the patch is to load the module (and only that), I
think it should create a third unit instead:
zfs-load-module.service
^^ 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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