Recover ZFS pool after having deleted zfs configuration file in /boot

[antonin tessier]

>> Or try 'zpool import -D'.
          -D      Lists destroyed pools only.
    It can help if you mail the output from the commands you run. That might     give other people clues you don't recognize.
Actually, these commands both produce the same result: they simply stop without printing anything ...I noticed that /boot/zfs/ was deleted.
Thank you.