Package: initramfs-tools
Version: 0.118
Severity: wishlist

Dracut, which provides linux-initramfs-tool and is thus an alternative
to initramfs-tools, supports restoring the initrd on shutdown and
pivoting into it:
https://www.kernel.org/pub/linux/utils/boot/dracut/dracut.html#_dracut_on_shutdown

One example where this is needed is a ZFS root filesystem: A clean
shutdown requires unmounting the root filesystem and exporting the
ZFS storage pool containing that filesystem. Dracut modules may
contain shutdown scripts which are called after the system has
pivoted to the initrd. In the case of ZFS, the shutdown script
looks like this:
https://github.com/zfsonlinux/zfs/blob/master/dracut/90zfs/export-zfs.sh.in

This is not specific to ZFS but affects anyone having the root
filesystem on an LVM. Currently, dracut is the only option for
these folks. It would be nice if initramfs-tools supported a
shutdown procedure akin to dracut to give people a choice.


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