[Bug 1585233] Re: Provide -root.tar.xz for bionic and later

[Robert C Jennings]

@daniel-thewatkins, please add '--xattrs' to the tar command in the
root-xz binary hook ala https://code.launchpad.net/~vorlon/livecd-
rootfs/lp.1302192/+merge/352055

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Title:
  Provide -root.tar.xz for bionic and later

Status in cloud-images:
  Confirmed
Status in livecd-rootfs package in Ubuntu:
  Fix Released

Bug description:
  Hi,
  compared to xenial [1], yakkety [2] is missing a -root.tar.xz file.
  The .tar.xz file is quite valuable compared to a -squashfs image for at least the following reasons:

  a.) it is much less common denominator (mac or windows can open it)
  b.) it is much smaller (138M compared to 171M for most recent xenial image)
  c.) it can be "streamed", where the squashfs image must be downloaded in complete before it can be viewed.  This is a significant optimization for for a system that can download and check while extracting.

  [1] http://cloud-images.ubuntu.com/daily/server/xenial/current/
  [2] http://cloud-images.ubuntu.com/daily/server/yakkety/current/

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