> I believe the zed systemd unit should at the very least be modified
not to start inside containers
That can be done with ConditionVirtualization=!container
> (b) there were an /etc/default/zed which enabled one to disable zed
altogether.
Please don't do that. /etc/default files should never have been mis-used
for enabling/disabling services -- there already is update-rc.d
enable/disable for that (or the more direct systemctl enable/disable
now).
> we could have a unit list "RequiresFilesystem" with "zfs" and so have
zfs-zed kick in as soon as any zfs mount occurs
There is no direct way to express this; but IMHO a sufficient
approximation is to start it if a zfs file system exists? That can be
done with an udev rule like
ACTION!="remove", SUBSYSTEM=="block", ENV{ID_FS_TYPE}=="zfs",
ENV{SYSTEMD_WANTS}+="zed.service"
Note that I don't know the precise value of ID_FS_TYPE for zpools, and
the precise name of the service you want to start.
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https://bugs.launchpad.net/bugs/1624540
Title:
please have lxd recommend zfs
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