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[Bug 1571241] Re: ZFS initrd script does not import zpool using /dev/disk/by-id device paths


** Also affects: zfs-linux (Ubuntu Yakkety)
   Importance: Undecided
       Status: Fix Released

** Also affects: zfs-linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

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  ZFS initrd script does not import zpool using /dev/disk/by-id device

Status in zfs-linux package in Ubuntu:
  Fix Released
Status in zfs-linux source package in Xenial:
Status in zfs-linux source package in Yakkety:
  Fix Released

Bug description:
  Ubuntu 16.04 includes initrd zfs support, but the provided script does
  not allow zpools to be imported using the /dev/disk/by-id paths. As a
  result, the pool will be imported using "/dev/sdX" device names, which
  is not the preferred way.

  Tested and validated solution/proof of concept:

   - extract system generated initrd
   - edit scripts/zfs file: replace "zpool import -o readonly=on -N" with "zpool import -o readonly=on -d /dev/disk/by-id -N"
   - manually generate initrd using the altered script (using cpio)
   - replace system generated initrd with altered one

  I'd suggest adding a variable to /etc/default/zfs that would be
  reflected in the initrd zfs script, but perhaps the ZoL folks are
  better suited to give advice on this.

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